WO2021075405A1 - 樹脂組成物および成形品 - Google Patents
樹脂組成物および成形品 Download PDFInfo
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- WO2021075405A1 WO2021075405A1 PCT/JP2020/038504 JP2020038504W WO2021075405A1 WO 2021075405 A1 WO2021075405 A1 WO 2021075405A1 JP 2020038504 W JP2020038504 W JP 2020038504W WO 2021075405 A1 WO2021075405 A1 WO 2021075405A1
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- ZJOLCKGSXLIVAA-UHFFFAOYSA-N ethene;octadecanamide Chemical compound C=C.CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(N)=O ZJOLCKGSXLIVAA-UHFFFAOYSA-N 0.000 description 1
- 125000005677 ethinylene group Chemical group [*:2]C#C[*:1] 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000004464 hydroxyphenyl group Chemical group 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 125000006178 methyl benzyl group Chemical group 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 102200082816 rs34868397 Human genes 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000002109 single walled nanotube Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Definitions
- the present invention relates to a resin composition and a molded product obtained by molding the resin composition.
- Camera module parts having image sensors such as CCD (Charge Coupled Device) and CMOS (Complementary Metal Oxide Semiconductor) are used in mobile phones, game machines, personal computers, in-vehicle cameras, mobile phone terminals, and the like. In recent years, further miniaturization and higher performance have been promoted, and development of small camera module parts has been promoted.
- CCD Charge Coupled Device
- CMOS Complementary Metal Oxide Semiconductor
- the motor inside the lens is moved to adjust the focus and prevent blurring.
- a mechanism is incorporated into a camera module, rubbing and friction occur between the camera module parts or between the camera module parts and other parts, so that the surface of the camera module parts has a small dynamic friction coefficient. That (sliding) is required.
- the surface of the image sensor and the surface of the lens in the camera module may easily cause black scratches and stains even with a small amount of dust, and the camera performance may deteriorate.
- the camera module parts may be scraped off due to rubbing or rubbing between the camera module parts or the camera module parts with other parts, and fine resin pieces may cause dust and adhere to the lens surface. It accumulates between the camera module parts and interferes with the operation of the mechanical parts. Therefore, the resin material constituting the camera module component is required to suppress the generation of debris, dust, and dust during manufacturing and use (dust generation resistance).
- the molecular weight of the resin does not decrease so much by molding (molding stability). It is also required that the molded product has excellent mechanical strength. Further, it is also required that the surface of the molded product has a smooth surface (appearance) without the filler such as silica rising.
- Patent Document 1 a resin composition in which a specific ratio of polyarylate resin and polycarbonate resin is contained in a specific amount of calcined polytetrafluoroethylene resin and spherical silica.
- Patent Document 2 a resin composition in which silica particles and a specific phosphite ester compound are contained in a specific amount in a specific ratio of a polyarylate resin and a polycarbonate resin.
- the present invention is a resin composition having excellent molding stability, which can mold a molded product having excellent dust generation resistance, heat resistance, dimensional stability, slidability, mechanical strength and appearance, and the molded product thereof. It is an object of the present invention to provide a molded product.
- a resin composition in which a polyarylate resin and a polycarbonate resin are used in combination contains silica particles having a specific average particle size and fluorine atoms having a specific average particle size.
- the gist of the present invention is as follows. ⁇ 1> Polyarylate resin, polycarbonate resin, silica particles having an average particle size of 0.4 to 12 ⁇ m, fluorine atom-containing polymer particles having an average particle size of 0.5 to 20 ⁇ m, and sub-represented by the general formula (I). Contains phosphoric acid ester compound, The mass ratio of the polyarylate resin to the polycarbonate resin is 25/75 to 92/8. The content of the silica particles is 4 to 65 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin.
- the content of the fluorine atom-containing polymer particles is 0.5 to 12 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin.
- m1 and m2 are independently integers from 0 to 5; R 1 and R 2 each represent an alkyl group having 1 to 12 carbon atoms which may have a substituent independently; Four R 3 represents an alkylene group having 1 to 5 carbon atoms independently).
- the phosphite ester compound is a compound represented by the general formula (I-1): (In the formula (I-1), R 11 to R 16 are alkyl groups having 1 to 10 carbon atoms which may independently have hydrogen atoms or substituents).
- the resin composition further contains the hindered phenol compound represented by the general formula (II) in an amount of 0.01 to 1 part by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin.
- ⁇ 5> The resin composition according to any one of ⁇ 1> to ⁇ 4>, wherein the fluorine atom-containing polymer particles are unfired fluorine atom-containing polymer particles.
- ⁇ 6> The resin composition according to any one of ⁇ 1> to ⁇ 5>, wherein the content of the silica particles is 4 to 50 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin. Stuff. ⁇ 7>
- the content of the silica particles is 8 to 62 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin.
- the average particle size of the silica particles is 2 to 12 ⁇ m.
- the mass ratio of the polyarylate resin to the polycarbonate resin is 25/75 to 70/30.
- the content of the silica particles is 8 to 50 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin.
- the average particle size of the silica particles is 2 to 8 ⁇ m.
- the content of the phosphite ester compound is 0.03 to 0.5 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin.
- the fluorine atom-containing polymer is polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene / perfluoromethylvinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / ethylene copolymer.
- the resin composition according to any one of ⁇ 1> to ⁇ 8> which is one or more polymers selected from the group consisting of coalescence.
- the molded product according to ⁇ 10>, wherein the molded product is a camera module component.
- the molded product according to ⁇ 10>, wherein the molded product is a lens unit component.
- the resin composition of the present invention is excellent in molding stability.
- the resin composition of the present invention can mold a molded product having excellent dust generation resistance, heat resistance, dimensional stability, slidability and appearance.
- the molded product molded from the resin composition of the present invention is also excellent in mechanical strength, particularly bending strength.
- test piece manufactured in an Example (A) is the perspective view of the test piece, (B) is the front view and the side view of the test piece.
- the resin composition of the present invention contains a polyarylate resin, a polycarbonate resin, silica particles, a fluorine atom-containing polymer particle, and a phosphite ester compound.
- the polyarylate resin used in the present invention is a resin composed of an aromatic dicarboxylic acid residue unit and a bisphenol residue unit.
- the polyarylate raw material for introducing bisphenol residues is bisphenols.
- bisphenol A 2,2-bis (4-hydroxyphenyl) propane
- 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane and 2
- 2-bis (4-hydroxy-3,5-dibromophenyl) propane 2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane
- 4,4'-dihydroxydiphenylsulfone 4,4'- Dihydroxydiphenyl ether
- 4,4'-dihydroxydiphenylsulfide 4,4'-dihydroxydiphenylketone
- 4,4'-dihydroxydiphenylmethane 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-) Hydroxyphenyl) -3,3,5-trimethylcyclohexane and the like can be mentioned.
- These compounds may be used alone or in combination of two or more.
- bisphenol A 2,2-bis (4-hydroxy-3,5
- Preferable examples of raw materials for introducing aromatic dicarboxylic acid residues include terephthalic acid and isophthalic acid.
- a polyarylate resin composition obtained by mixing and using both of them is particularly preferable in terms of melt processability and mechanical properties.
- the mixing ratio (terephthalic acid / isophthalic acid) can be arbitrarily selected, but the molar fraction is preferably in the range of 90/10 to 10/90, and more preferably 70/30 to 30/70. More preferably, it is 60/40 to 40/60, and optimally 50/50. Even if the mixed mole fraction of terephthalic acid is less than 10 mol% or more than 90 mol%, it may be difficult to obtain a sufficient degree of polymerization when polymerizing by the interfacial polymerization method.
- the polycarbonate resin used in the present invention is a resin composed of bisphenol residues and carbonate residue units.
- Examples of bisphenols as raw materials for introducing bisphenol residue units include bisphenol A, 2,2-bis (3,5-dibromo-4-hydroxyphenyl) propane, and 2,2-bis (3,5-dimethyl).
- -4-Hydroxyphenyl) propane 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, 1,1-bis (3,3) 5-Dimethyl-4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) decane
- 1,4-bis (4-hydroxyphenyl) propane, 1,1-bis (4-hydroxyphenyl) cyclododecane 4,4'-Dihydroxydiphenyl ether, 4,4'-dithiodiphenol, 4,4'-dihydroxy-3,3'-dichlorodiphenyl ether, 4,4'-dihydroxy-2,5-dihydroxydiphenyl
- a carbonyl halide such as phosgene and a carbonic acid ester such as diphenyl carbonate can be used.
- the resin composed of the polyarylate resin and the polycarbonate resin may be produced by melt-kneading the polyallylate resin alone and the polycarbonate resin alone, or may use a copolymer of the polyarylate resin and the polycarbonate resin. ..
- the method for polymerizing the polyarylate resin, the method for polymerizing the polycarbonate resin, and the method for polymerizing the copolymerized resin of the polyarylate and the polycarbonate are particularly limited to the interfacial polymerization method and the melt polymerization method as long as they satisfy the object of the present invention. Instead, a known method may be used.
- the ultimate viscosity of the resin composed of the polyarylate resin and the polycarbonate resin is preferably 0.40 to 0.60. If the ultimate viscosity exceeds 0.60, the melt viscosity becomes high and injection molding becomes difficult. If the ultimate viscosity is less than 0.40, the impact strength of the obtained molded product tends to be insufficient. It is preferable that the polyarylate resin and the polycarbonate resin each have an ultimate viscosity within the above range.
- Polyarylate resin and polycarbonate resin can also be obtained as commercial products.
- the mass ratio of the polyarylate resin to the polycarbonate resin is 25/75 to 92/8, which is preferable from the viewpoint of further improving dust generation resistance, molding stability, slidability and appearance. Is 25/75 to 70/30, more preferably 25/75 to 50/50, and even more preferably 25/75 to 40/60. If the proportion of polyarylate resin is too small, heat resistance and dimensional stability will decrease. If the ratio of the polyarylate resin is too large, the fluidity is poor and molding becomes difficult.
- Dust resistance refers to the property that a part of a molded product is hard to fall off as debris or dust during assembly and use. Dust resistance does not necessarily correlate with the slidability described later. For example, just because a molded product has excellent dust generation resistance does not mean that it has excellent slidability. Further, for example, just because a molded product has excellent slidability does not mean that it has excellent dust generation resistance. Molding stability refers to the property that the molecular weight of the resin does not easily decrease even by molding. The slidability is a characteristic relating to the smoothness of the surface of the molded product, and for example, the smaller the coefficient of kinetic friction, the better the characteristic.
- the appearance is a characteristic that a filler such as silica particles does not easily emerge on the surface of the molded product, and when the molded product has a black color, the surface of the molded product looks blacker.
- Dimensional stability refers to the characteristic that a molded product does not easily change in size even in a harsh environment.
- the silica particles used in the present invention are not particularly limited as long as they are silica particles used as a filler in the field of plastics.
- spherical silica is preferably used from the viewpoint of further improving dust generation resistance.
- the spherical shape is a shape having a maximum diameter / minimum diameter of 1 to 1.3, particularly 1 to 1.2 in a micrograph.
- the use of other inorganic particles, such as titania or alumina particles, in place of the silica particles reduces dimensional stability.
- the content of the silica particles needs to be 4 to 65 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin, and dust generation resistance, strength, heat resistance, dimensional stability, and molding. From the viewpoint of further improving stability, slidability and appearance, it is preferably 8 to 62 parts by mass, more preferably 8 to 50 parts by mass, still more preferably 8 to 40 parts by mass, and most preferably 8 to 30 parts by mass. It is the range of the part. If the content is less than 4 parts by mass, the dimensional stability of the resin composition becomes insufficient.
- the content of the silica particles is preferably 4 to 50 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin from the viewpoint of further improving the dust generation resistance alone.
- the average particle size of the silica particles blended in the resin composition is when the cumulative weight is 50% when the particle size distribution is measured using a particle size distribution measuring device such as a laser diffraction / scattering particle size distribution meter. It is defined by the particle size value of. This measurement is performed, for example, by adding silica particles to water or alcohol so as to have a measurement allowable concentration to prepare a suspension, and dispersing the suspension with an ultrasonic disperser.
- the average particle size of the silica particles blended in the resin composition of the present invention the more the function of the product formed by the resin composition when the silica particles fall off from the resin composition and become dust. Hard to inhibit.
- the average particle size of the silica particles if the average particle size of the silica particles is too small, the silica particles are raised on the surface of the molded product and appear white, so that the appearance is deteriorated. Therefore, the average particle size of the silica particles needs to be 0.4 to 12 ⁇ m, particularly 0.5 to 10 ⁇ m in practical use, and from the viewpoint of further improving dust generation resistance, appearance and molding stability. It is preferably 2 to 12 ⁇ m, more preferably 2 to 8 ⁇ m, and even more preferably 2 to 6 ⁇ m.
- the average particle size of the silica particles exceeds 12 ⁇ m, for example, when the resin composition of the present invention is used for a camera lens component, silica that has fallen off from the resin composition may hinder photography as dust. If the average particle size of the silica particles exceeds 12 ⁇ m, the dimensional stability of the part using the resin composition of the present invention becomes insufficient.
- the method for producing silica particles is not limited, and the silica particles can be produced by a known method.
- a chemical flame is formed by an ignition burner in an atmosphere containing oxygen, and silicon powder is charged into the chemical flame in an amount sufficient to form a dust cloud to cause an explosion to produce silica ultrafine particles.
- Examples thereof include a method in which alkoxysilane is hydrolyzed and aggregated under alkali to produce a sol-gel method.
- the silica particles may be surface-treated with a silane coupling treatment agent.
- Silica particles can also be obtained as commercial products.
- a dispersant may be used to disperse the silica particles in the resin matrix.
- the dispersant for example, one selected from the group consisting of fatty acid esters and derivatives thereof, fatty acid amides and derivatives thereof, and mixtures thereof can be used.
- the fatty acid amide include ethylene bishydroxystearic acid amide and ethylene bisstearic acid amide.
- the fluorine atom-containing polymer particles used in the present invention are polymer particles containing a fluorine atom-containing monomer as a polymerization component.
- As the polymerization method of the fluorine atom-containing polymer particles either calcined or uncalcined may be used regardless of suspension or emulsification.
- By using the fluorine atom-containing polymer particles all the properties of dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance are improved for the first time.
- the fluorine atom-containing polymer may be a polymer containing only a fluorine atom-containing monomer, or may be a copolymer of a fluorine atom-containing monomer and a fluorine atom-free monomer containing no fluorine atom.
- the fluorine atom-containing polymer is preferably a polymer containing only a fluorine atom-containing monomer from the viewpoint of further improving dust generation resistance and slidability.
- Examples of the fluorine atom-containing monomer include tetrafluoroethylene, vinylidene fluoride, perfluoromethyl vinyl ether, hexafluoropropylene, vinyl fluorinated and the like.
- Examples of the fluorine atom-free monomer include ethylene and propylene.
- the content ratio of the fluorine atom-containing monomer in the fluorine atom-containing polymer is usually 50 mol% or more, and is 70 mol% or more and 90 mol% or more from the viewpoint of further improving dust generation resistance and slidability.
- fluorine atom-containing polymer examples include polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene / perfluoromethyl vinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, and tetrafluoroethylene / ethylene.
- examples include polymers.
- polytetrafluoroethylene, particularly low molecular weight polytetrafluoroethylene is preferable from the viewpoint of further improving dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance. ..
- the low molecular weight polytetrafluoroethylene may contain a small amount of a copolymerization component (that is, a fluorine atom-free monomer).
- the content of the copolymerization component in the low molecular weight polytetrafluoroethylene is, for example, 2 mol% or less.
- the low molecular weight is a molecular weight as described later.
- the average particle size of the fluorine atom-containing polymer particles used in the present invention is 0.5 to 20 ⁇ m, and is preferably 0.5 to 10 ⁇ m from the viewpoint of further improving dust generation resistance, molding stability, and slidability. , More preferably 1 to 8 ⁇ m, still more preferably 2 to 6 ⁇ m, and particularly preferably 3 to 6 ⁇ m. If the average particle size of the fluorine atom-containing polymer is less than 0.5 ⁇ m, it may be difficult to impart slidability to the resin composition, or the resin composition itself may cause dust generation. If the average particle size exceeds 20 ⁇ m, the molding stability is impaired.
- the average particle size of the fluorine atom-containing polymer is the average particle size measured by a method of measuring a dispersion liquid dispersed in perchlorethylene by a light transmission method.
- the average particle size of the fluorine atom-containing polymer is the average particle size in the resin composition, but the average particle size of the raw material used for producing the resin composition is usually maintained as it is in the resin composition, and further. Is also maintained in molded articles manufactured using the resin composition.
- the molecular weight of the fluorine atom-containing polymer is not particularly limited, but a low molecular weight is preferable from the viewpoint of further improving dust generation resistance, molding stability and slidability.
- the low molecular weight means a molecular weight having a number average molecular weight of several thousand to several hundred thousand, for example, preferably 1 million or less, and more preferably 600,000 or less.
- the value measured by the differential scanning calorimeter (DSC method) is used.
- the melting point of the fluorine atom-containing polymer is not particularly limited, but from the viewpoint of further improving dust generation resistance, molding stability and slidability, it is preferably 320 ° C. or higher, particularly 325 to 335 ° C.
- the melting point uses the value measured by the differential scanning calorimeter (DSC method).
- the fluorine atom-containing polymer may be an unfired product or a fired product. Baking is the heating of a fluorine atom-containing polymer above its melting point.
- the fired product is one that has been fired and then crushed. By using the fired product, the dispersibility of the fluorine atom-containing polymer in the resin composition is improved.
- the fluorine atom-containing polymer is preferably an unfired product from the viewpoint of further improving dust generation resistance, appearance and slidability.
- the fluorine atom-containing polymer can be obtained as a commercially available product, or can be produced by a known method.
- the content of the fluorine atom-containing polymer particles is 0.5 to 12 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin, which further provides dust generation resistance, molding stability and slidability. From the viewpoint of improvement, it is preferably 1.5 to 12 parts by mass, more preferably 2 to 12 parts by mass, still more preferably 2 to 8 parts by mass, and most preferably 3 to 6 parts by mass. If the content is too small, the slidability and dust generation property are lowered, and if the content is too large, the molding stability is impaired.
- the fluorine atom-containing polymer may contain two or more kinds of fluorine atom-containing polymers having different monomer compositions, molecular weights and / or melting points. In that case, the total content thereof may be within the above range.
- the phosphite ester compound represented by the general formula (I) is used.
- a phosphite ester compound By using such a phosphite ester compound, all the properties of dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance are improved for the first time. If a phosphite ester compound not contained in the phosphite ester compound is used instead of the phosphite ester compound represented by the general formula (I), the molding stability and dust generation resistance are lowered.
- m1 and m2 are independently integers of 0 to 5, and in particular, further improvement in dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance. From the viewpoint of, it is preferably an integer of 1 to 5, and more preferably 1 to 3.
- R 1 and R 2 each independently represent an alkyl group having 1 to 12, preferably 1 to 10, more preferably 1 to 9, and even more preferably 1 to 5.
- the alkyl group include methyl group, ethyl group, n-propyl, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, hexyl group, heptyl group, octyl group and nonyl group. Examples include groups, decyl groups, undecyl groups and lauryl groups.
- the alkyl group may have a substituent.
- Examples of the substituent of the alkyl group in R 1 and R 2 include an aryl group such as a phenyl group and a naphthyl (preferably a phenyl group); a halogen atom such as a fluorine atom, a chlorine atom and a bromine atom (preferably a fluorine atom and chlorine). Atom) and the like.
- Preferred substituents are aryl groups, especially phenyl groups.
- the alkyl group has a substituent, the number of carbon atoms of the alkyl group does not include the number of carbon atoms of the substituent.
- Methyl group, mononaphthylmethyl group, monofluoromethyl group, monochloromethyl group) and the like can be mentioned.
- 2 or more of R 1 is may be selected independently.
- 2 or more R 2 is may be selected independently.
- R 1 and R 2 may be alkyl groups having no substituent from the viewpoint of further improving dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance. preferable.
- R 3 represents an alkylene group having 1 to 5 carbon atoms independently.
- R 3 include ⁇ dust resistance, strength, heat resistance, dimensional stability, molding stability, from the viewpoint of further improving the sliding and appearance properties, preferably each independently of 1 to 3 carbon atoms Indicates an alkylene group.
- Preferred alkylene groups of R 3 include, for example, a methylene group, a dimethylene group and a triethylene group.
- the most preferred four R 3 are each independently a methylene group or a dimethylene group, in particular simultaneously methylene group.
- the phosphite ester compound preferable from the viewpoints of dust generation resistance, heat resistance, dimensional stability, appearance, molding stability and strength is the general formula. It is a phosphite ester compound represented by (I-1).
- R 11 and R 14 are independently hydrogen atoms or alkyl groups having 1 to 10 carbon atoms, respectively. From the viewpoint of further improving dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance, R 11 and R 14 are independently preferably having 1 to 5 carbon atoms, respectively. , More preferably 1 to 4 alkyl groups. Specific examples of the alkyl group in R 11 and R 14 include an alkyl group having a predetermined number of carbon atoms among the same specific examples as the alkyl group in R 1 and R 2. In R 11 and R 14 , the alkyl group may have a substituent.
- Examples of the substituent of the alkyl group in R 11 and R 14 include a substituent similar to the substituent that the alkyl group in R 1 and R 2 may have. Preferred substituents on the alkyl groups in R 11 and R 14 are aryl groups, especially phenyl groups. In R 11 and R 14 , when the alkyl group has a substituent, the number of carbon atoms of the alkyl group does not include the number of carbon atoms of the substituent. Specific examples of the alkyl group having a substituent in R 11 and R 14 include the same specific example as the alkyl group having a substituent in R 1 and R 2 .
- More preferable alkyl groups of R 11 and R 14 include, for example, methyl group, ethyl group, n-propyl, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, benzyl group and phenethyl group. , ⁇ -Methylbenzyl group, ⁇ , ⁇ -dimethylbenzyl group, diphenylmethyl group and the like.
- R 11 and R 14 are methyl group, ethyl group, n-propyl, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, benzyl group, respectively, independently or simultaneously. It is a phenethyl group, an ⁇ -methylbenzyl group, an ⁇ , ⁇ -dimethylbenzyl group, or a diphenylmethyl group, and a methyl group or an ⁇ , ⁇ -dimethylbenzyl group is particularly preferable.
- the alkyl group does not have a substituent in R 11 and R 14.
- the most preferred R 11 and R 14 are the same group, especially the methyl group at the same time.
- R 12 and R 15 are independently hydrogen atoms or alkyl groups having 1 to 10 carbon atoms, respectively. From the viewpoint of further improving dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance, R 12 and R 15 are independently preferably having 1 to 5 carbon atoms, respectively. , More preferably 2 to 5, still more preferably 3 to 5 alkyl groups. Specific examples of the alkyl group in R 12 and R 15 include an alkyl group having a predetermined number of carbon atoms among the same specific examples as the alkyl group in R 1 and R 2. In R 12 and R 15 , the alkyl group may have a substituent.
- Examples of the substituent of the alkyl group in R 12 and R 15 include a substituent similar to the substituent that the alkyl group in R 1 and R 2 may have. Preferred substituents on the alkyl groups in R 12 and R 15 are aryl groups, especially phenyl groups. In R 12 and R 15 , when the alkyl group has a substituent, the number of carbon atoms of the alkyl group does not include the number of carbon atoms of the substituent. Specific examples of the alkyl group having a substituent in R 12 and R 15 include the same specific example as the alkyl group having a substituent in R 1 and R 2 .
- More preferable alkyl groups of R 12 and R 15 include, for example, ethyl group, n-propyl, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, phenethyl group, ⁇ -. Examples thereof include methylbenzyl group and ⁇ , ⁇ -dimethylbenzyl group. More preferred R 12 and R 15 are ethyl group, n-propyl, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, benzyl group, respectively, independently or simultaneously.
- a phenethyl group, an ⁇ -methylbenzyl group, or an ⁇ , ⁇ -dimethylbenzyl group, and a tert-butyl group or an ⁇ , ⁇ -dimethylbenzyl group is particularly preferable.
- the alkyl group does not have a substituent in R 12 and R 15.
- the most preferred R 12 and R 15 are the same group, especially at the same time the tert-butyl group.
- R 13 and R 16 are independently hydrogen atoms or alkyl groups having 1 to 10 carbon atoms, respectively.
- R 13 and R 16 are independently preferable in terms of the number of hydrogen atoms or carbon atoms, respectively, from the viewpoint of further improving dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance. It shows an alkyl group of 1 to 5, and more preferably an alkyl group having 3 to 5 carbon atoms.
- Specific examples of the alkyl group in R 13 and R 16 include an alkyl group having a predetermined number of carbon atoms among the same specific examples as the alkyl group in R 1 and R 2. In R 13 and R 16 , the alkyl group may have a substituent.
- Examples of the substituent of the alkyl group in R 13 and R 16 include a substituent similar to the substituent that the alkyl group in R 1 and R 2 may have. Preferred substituents on the alkyl groups in R 13 and R 16 are aryl groups, especially phenyl groups. In R 13 and R 16 , when the alkyl group has a substituent, the number of carbon atoms of the alkyl group does not include the number of carbon atoms of the substituent. Specific examples of the alkyl group having a substituent in R 13 and R 16 include the same specific example as the alkyl group having a substituent in R 1 and R 2 .
- R 13 and R 16 include, for example, n-propyl, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group and pentyl group. More preferred R 13 and R 16 are hydrogen atoms, n-propyl, isopropyl groups, n-butyl groups, isobutyl groups, sec-butyl groups, tert-butyl groups, or pentyl groups, respectively, independently or simultaneously. Particularly preferred is a hydrogen atom or a tert-butyl group.
- the alkyl group does not have a substituent in R 13 and R 16.
- the most preferred R 13 and R 16 are the same group, especially at the same time the tert-butyl group.
- more preferable phosphite ester compounds are compound (I-1-1) and / or compound (I-1-6), and more preferably compound (I-1-6). -1-1)).
- the phosphite ester compound represented by the general formula (I) can be obtained as a commercially available product, or can be synthesized by a known method.
- Compound (I-1-1) is available, for example, as commercially available "PEP-36” manufactured by ADEKA Corporation.
- Compound (I-1-6) is available, for example, as a commercially available “Doverphos S-9228PC” manufactured by Dover Chemical Corporation.
- the content of the phosphite ester compound represented by the general formula (I) is 0.008 to 1.2 parts by mass, particularly 0.01 to 1,000 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin. 1 part by mass, preferably 0.02 to 0.5 parts by mass, from the viewpoint of further improving dust generation resistance, strength, heat resistance, dimensional stability, molding stability, slidability and appearance. It is preferably 0.03 to 0.5 parts by mass, and more preferably 0.03 to 0.1 parts by mass. If the content is too low or too high, molding stability and dust generation resistance will be reduced.
- the phosphite ester compound represented by the general formula (I) may be used in combination of two or more, and in that case, the total amount thereof may be within the above range.
- the composition of the present invention may contain a phosphorus compound produced by decomposition of a phosphite ester (hydrolysis, thermal decomposition, etc.).
- the resin composition of the present invention preferably further contains the hindered phenol compound represented by the general formula (II).
- the hindered phenol compound represented by the general formula (II) By containing such a hindered phenol compound, molding stability and dust generation resistance can be further improved.
- X represents a hydrocarbon group or an ether group.
- the hydrocarbon group is a monovalent or tetravalent hydrocarbon group having 1 to 20 carbon atoms.
- the monovalent hydrocarbon group include alkyl groups having 10 to 20, preferably 15 to 20, and more preferably 16 to 18 carbon atoms.
- Examples of such an alkyl group include a decyl group, an undecylic group, a lauryl group, a tridecylic group, a myristyl group, a pentadecyl group, a cetyl group, a heptadecyl group, a stearyl group, a nonadecylic group, and an eicosyl group.
- tetravalent hydrocarbon group examples include saturated hydrocarbon groups having 1 to 2 carbon atoms, preferably carbon atoms.
- the ether group is a divalent group, specifically "-O-".
- Preferred X is a hydrocarbon group, particularly a monovalent or tetravalent hydrocarbon group.
- N is an integer of 1 or more, particularly 1 to 4, which is determined according to the valence of X.
- n is 1.
- n is 2.
- n is 3.
- X is tetravalent, n is 4.
- R 21 and R 22 are independently hydrogen atoms or alkyl groups having 1 to 9 carbon atoms, respectively.
- R 21 and R 22 each independently represent an alkyl group preferably having 1 to 5 carbon atoms, more preferably 3 to 5 carbon atoms. More preferable alkyl groups of R 21 and R 22 include, for example, n-propyl, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group and pentyl group.
- the most preferred R 21 and R 22 are the same group, especially the tert-butyl group at the same time.
- R 23 and R 24 each independently represent an alkylene group having 1 to 5 carbon atoms.
- R 23 and R 24 each independently and preferably represent an alkylene group having 1 to 3 carbon atoms.
- Preferred alkylene groups of R 23 and R 24 include, for example, a methylene group, a dimethylene group and a triethylene group.
- the most preferred R 23 and R 24 are independently methylene or dimethylene groups, in particular dimethylene and methylene groups, respectively.
- the hindered phenol compounds represented by the general formula (II) described above are the general formulas (II-1) and (II-2). It is a hindered phenol compound represented by, particularly a hindered phenol compound represented by the general formula (II-1).
- R 21 and R 22 are similar to R 21 and R 22 in formula (II), respectively.
- R 23 and R 24 are similar to R 23 and R 24 in formula (II), respectively.
- R 21 and R 22 are similar to R 21 and R 22 in formula (II), respectively.
- R 23 is similar to R 23 in formula (II).
- a more preferable hindered phenol compound from the viewpoint of further improving molding stability and dust generation resistance is a hindered phenol compound of the general formula (II-1), particularly a compound (II-1-1).
- the hindered phenol compound represented by the general formula (II) can be obtained as a commercially available product, or can be synthesized by a known method.
- Compound (II-1-1) is available, for example, as commercially available Irganox 1010 manufactured by BASF.
- Compound (II-2-1) is available, for example, as a commercially available product, Ilganox 1076 manufactured by BASF.
- the content of the hindered phenol compound represented by the general formula (II) is 0.01 to 1 part by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin, and has molding stability and dust generation resistance. From the viewpoint of further improving the property, it is preferably 0.02 to 0.5 parts by mass, and more preferably 0.02 to 0.1 parts by mass.
- the hindered phenol compound represented by the general formula (II) may be used in combination of two or more, and in that case, the total amount thereof may be within the above range.
- the resin composition of the present invention may further contain carbon nanotubes from the viewpoint of improving antistatic performance.
- the carbon nanotube is not particularly limited, and has a shape in which a graphite layer is wound into a cylindrical shape.
- the carbon nanotubes are preferably multilayer carbon nanotubes.
- the carbon nanotube of the present invention can generally be produced by a laser ablation method, an arc discharge method, a thermal CVD method, a plasma CVD method, a combustion method, or the like, but any carbon nanotube may be produced.
- carbon nanotubes obtained by a method of making acetylene as a catalyst carrier by a thermal CVD method using zeolite as a catalyst have high purity and good quality without any particular purification, although they have an amorphous carbon coating due to some thermal decomposition. It is preferable as the carbon nanotube used in the present invention in that it is a graphitized multi-walled carbon nanotube.
- the carbon nanotubes used in the present invention preferably have an average length of 5 to 100 ⁇ m, and more preferably 10 to 80 ⁇ m.
- the carbon nanotubes preferably have a diameter of 1 to 200 nm, and more preferably 3.5 to 150 nm.
- the content of the carbon nanotubes is preferably 0.5 to 15 parts by mass, more preferably 1 to 10 parts by mass, and 2 to 2 to 10 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin and the polycarbonate resin. It is more preferably 8 parts by mass, and particularly preferably 3 to 6 parts by mass. If the content of the carbon nanotubes is less than 0.1 parts by mass, it may be insufficient to sufficiently reduce the surface resistivity, and if it exceeds 10 parts by mass, the effect of reducing the surface resistivity has already reached saturation. In addition, molding stability may be insufficient.
- the resin composition of the present invention contains a mold release agent, a pigment, a dye, a weather resistant agent, an antioxidant, a heat stabilizer, and a difficulty as long as the characteristics of the resin composition of the present invention are not impaired.
- a flame retardant, an antistatic agent, an impact resistance improving agent, a sliding agent such as ultra-high molecular weight polyethylene, and the like can be added.
- the resin composition of the present invention preferably contains a mold release agent.
- the release agent include fatty acid esters of saturated aliphatic polyols.
- the method for producing the resin composition of the present invention is not particularly limited, as long as each component is uniformly dispersed in the resin composition.
- polyarylate resin, polycarbonate resin, silica particles, fluorine atom-containing polymer particles and phosphite ester compounds, and other additives are uniformly blended using a tumbler or a Henschel mixer, then melt-kneaded and pelletized. There is a method of converting.
- the molding method of the resin composition of the present invention is not particularly limited, and examples thereof include an injection molding method, an extrusion molding method, a blow molding method, and a sintering molding method. Of these, the injection molding method is preferable because it has a large effect of improving mechanical properties and moldability.
- the injection molding machine used for injection molding is not particularly limited, and examples thereof include a screw in-line type injection molding machine and a plunger type injection molding machine. The resin composition heated and melted in the cylinder of the injection molding machine is weighed for each shot, injected into the mold in a molten state, cooled and solidified in a predetermined shape, and then taken out from the mold as a molded product. Is done.
- the molded product of the present invention can be produced by molding using the resin composition having the above pellet shape.
- the molded article of the present invention may also be produced by kneading the silica particles in advance with a polyarylate resin and / or a polycarbonate resin, and then further kneading and molding the remaining necessary components.
- the molded article of the present invention may also be produced by dry-blending a polyarylate resin, a polycarbonate resin, silica particles, a fluorine atom-containing polymer particle and a phosphite ester compound, and directly molding the product without pelletization.
- the resin composition of the present invention is excellent in molding stability.
- the resin composition (pellet) of the present invention is injection-molded at a resin temperature of 340 ° C. and a molding cycle of 900 seconds to prepare the test piece shown in FIG. 1, the ultimate viscosity of the molded product based on the ultimate viscosity of the pellet is obtained.
- the rate of decrease is usually less than 10%, preferably less than 7%, more preferably less than 4%.
- a detailed measurement method is shown in Examples. 1A and 1B are views for explaining a test piece, FIG. 1A is a perspective view of the test piece, and FIG. 1B is a front view and a side view of the test piece.
- the unit of dimension in FIG. 1 is "mm".
- the molded product of the present invention has excellent strength.
- the resin composition of the present invention is injection-molded at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to prepare a dumbbell test piece, and the bending strength of the test piece is measured according to JIS K7171, the bending strength is usually normal. , 82 MPa or more, preferably 92 MPa or more, more preferably 102 MPa or more. A detailed measurement method is shown in Examples.
- the molded product of the present invention has excellent heat resistance.
- the resin composition of the present invention is injection-molded at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to prepare a dumbbell test piece, and the deflection temperature under load is 1.8 MPa according to JIS K7191-1 and K7191-2.
- the deflection temperature under load is usually 148 ° C. or higher, preferably 150 ° C. or higher, and more preferably 152 ° C. or higher.
- a detailed measurement method is shown in Examples.
- the molded product of the present invention has excellent dimensional stability.
- the resin composition of the present invention is injection-molded at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to produce a ring-shaped molded product, holding in a low temperature environment and holding in a high temperature environment are repeated.
- the rate of change of the inner diameter is usually in the range of ⁇ 0.10, preferably in the range of ⁇ 0.08, and more preferably in the range of ⁇ 0.06.
- a detailed measurement method is shown in Examples.
- the molded product of the present invention has excellent dust generation resistance.
- the resin composition of the present invention is injection-molded at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to prepare the test pieces shown in FIG. 1, and 100 test pieces are placed in one container at 300 times / minute.
- the dust generation rate of the molded product is usually less than 0.10%, preferably less than 0.07%, and more preferably less than 0.04%.
- a detailed measurement method is shown in Examples.
- the molded product of the present invention has an excellent appearance.
- the surface is usually smooth, which is preferable. Is smooth and does not appear white, more preferably there is no floating of silica particles, and it is smooth and does not appear white.
- a detailed evaluation method is shown in Examples.
- the molded product of the present invention has excellent slidability.
- the resin composition of the present invention is injection-molded at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to prepare a plate-shaped molded product, and a sliding partner with respect to the plate-shaped molded product according to the JIS K7218A method.
- the dynamic friction coefficient is usually 0.30 or less, preferably 0.27 or less, and more preferably 0.23 or less.
- a detailed measurement method is shown in Examples.
- the molded product of the present invention preferably has excellent antistatic performance.
- the surface resistivity is preferably 10 11 ⁇ or less, more preferably 10 10 or less Omega, more preferably not more than 10 9 Omega. A detailed measurement method is shown in Examples.
- the molded product produced from the resin composition has excellent dust generation resistance, molding of products in which dust generation is likely to occur, for example, camera module parts, lens unit parts, actuator parts, etc. It is useful for manufacturing (molding) products.
- Camera module parts are resin parts that make up electronic parts with camera functions that are installed in mobile phones, game machines, personal computers, in-vehicle cameras, mobile phone terminals, and the like.
- the lens unit component is a resin component that constitutes the lens unit of an electronic component having a camera function mounted on a mobile phone, a game machine, a personal computer, an in-vehicle camera, a mobile phone terminal, or the like.
- the lens unit component is one of the components of the camera module component.
- Actuator parts are resin parts that make up actuators that control movement or mechanical action in mobile phones, game consoles, personal computers, in-vehicle cameras, mobile phone terminals, and the like.
- the actuator component is one of the components of the camera module component.
- Average particle size 4.5 ⁇ m Multi-walled carbon nanotubes; "K-NANOS-100T” manufactured by Kumho Petrochemical Co., Ltd. (average length 26 ⁇ m, diameter 8 to 15 nm): -Phosphite ester compound; "PEP-36” manufactured by ADEKA Corporation; the compound (I-1-1): Phosphite ester compound; “Doverphos S-9228PC” manufactured by Dover Chemical Corporation; said compound (I-1-6): -Phosphite ester compound; "PEP-8” manufactured by ADEKA; represented by the following chemical formula:
- -Hindered phenol compound "Irganox 1010" manufactured by BASF; the compound (II-1-1): -Release agent; "VPG-861” manufactured by Emily Oleochemicals; fatty acid ester of saturated aliphatic polyol: -Pigment: carbon black.
- a ring-shaped molded product having an outer diameter of 30 mm, an inner diameter of 26 mm, and a thickness of 2 mm is injection-molded (one side gate) at a resin temperature of 340 ° C. and a molding cycle of 30 seconds. Molded. Then, the inner diameter was measured at multiple points with a high-precision two-dimensional measuring instrument (manufactured by KEYENCE, model number: UM-8400), and the average inner diameter was obtained. Then, “-40 ° C. ⁇ 1 hour” ⁇ “80 ° C. ⁇ 1 hour” was set as one cycle, and a total of 30 cycles were processed to obtain the rate of change of the average inner diameter.
- the dimensional stability was evaluated by the following method based on the rate of change. ⁇ ; ⁇ 0.06; ⁇ ; ⁇ 0.08; ⁇ ; ⁇ 0.10; (no problem in practical use) X; less than -0.1 or more than +0.1.
- the resin composition was molded using an injection molding machine (J35AD manufactured by Japan Steel Works, Ltd.) at a resin temperature of 340 ° C. and a molding cycle of 900 seconds to prepare a test piece as shown in FIG.
- the rate of decrease in the ultimate viscosity of the molded product was determined based on the following formula. As for this value, the smaller the value, the better the molding stability, and less than 10%, the molding stability was regarded as no problem in practical use.
- the resin composition was molded using an injection molding machine (J35AD manufactured by Japan Steel Works, Ltd.) at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to prepare a test piece as shown in FIG.
- the surface appearance of the obtained test piece was visually judged according to the following criteria.
- ⁇ Silica particles do not appear on the surface of the molded product at all and do not appear white, and the surface is completely smooth; ⁇ : Silica particles slightly emerge on the surface of the molded product, but do not appear white and the surface is smooth; ⁇ : Although the silica particles are slightly raised on the surface of the molded product, the surface is smooth with only a slight white appearance (no problem in practical use); X: Silica particles are raised on the surface of the molded product and appear white, and the surface is not smooth.
- the resin composition was molded using an injection molding machine (J35AD manufactured by Japan Steel Works, Ltd.) at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to prepare a test piece as shown in FIG. 100 of these test pieces were placed in a stainless steel container (inner diameter 70 mm, height 180 mm), set in a shaker SA300 manufactured by Yamato Scientific Co., Ltd., and vibrated 300 times / minute for 24 hours. After 24 hours, the molded product was taken out from the container, and the dust generation ratio was determined based on the following formula. As for this value, the smaller the value, the better the dust generation resistance, and less than 0.1% was regarded as having no practical problem in dust generation resistance.
- the total mass of 100 test pieces after the test is the mass after removing dust and the like adhering to the surface by air cleaning.
- Dynamic friction coefficient The resin composition was molded using an injection molding machine (manufactured by Toshiba Machine Co., Ltd., model number: EC100N II) at a resin temperature of 340 ° C. and a molding cycle of 30 seconds, and a plate-shaped test piece (length 70 mm ⁇ width). 40 mm ⁇ thickness 2 mmt) was produced.
- JIS K7218 A method using Suzuki type continuous friction wear tester (manufactured by Yasuda Seiki Seisakusho, model No. 283-S-PC) under the conditions of speed 0.1 m / s and load 0.5 MPa. The dynamic friction coefficient was measured.
- a sliding mating material (S45C ring, outer diameter ⁇ 25.6 mm, inner diameter ⁇ 20 mm, length 15 mm) was rotated with respect to the plate-shaped test piece. A coefficient of dynamic friction of 0.3 or less was judged to be "no problem in practical use”.
- the resin composition was molded using an injection molding machine (manufactured by Toshiba Machine Co., Ltd., model number: EC100N II) at a resin temperature of 340 ° C. and a molding cycle of 30 seconds to prepare a disk test piece.
- the surface resistivity of the obtained test piece was measured using a digital ultra-high resistance / micro ammeter (R8340A manufactured by Advantest). 10 11 ⁇ or less was considered to have antistatic performance.
- the surface resistivity is preferably 10 11 ⁇ or less in order to suppress the adhesion of dust on the molded product.
- Tables 1 to 4 show the compositions of the resin compositions obtained in Examples and Comparative Examples and their evaluation results.
- All of the resin compositions of Examples 1 to 19 were excellent in strength, heat resistance, dimensional stability and molding stability, but also excellent in dust generation resistance, slidability and appearance.
- the resin compositions of Examples 13 to 18 were further excellent in antistatic performance.
- the ratio of the polyarylate resin was too low with respect to the mass ratio of the polyarylate resin and the polycarbonate resin, so that the heat resistance and the dimensional stability were lowered.
- the ratio of the polyarylate resin to the polycarbonate resin was too high, so that the fluidity was poor and the molding could not be performed.
- the content of silica particles was too small, so that the dimensional stability was lowered.
- the content of silica particles was too large, it became difficult to pelletize by extrusion during melt-kneading.
- the average particle size of the silica particles was too large, so that the dimensional stability was lowered.
- the content of the specific phosphite ester compound was too small or too large, so that the molding stability and the dust generation resistance were deteriorated.
- the resin composition of Comparative Example 8 since a phosphite ester compound different in type from the specific phosphite ester compound was used, molding stability and dust generation resistance were lowered.
- the alumina particles were contained instead of the silica particles, so that the dimensional stability was lowered.
- the resin composition of the present invention is useful for molding camera module parts, lens unit parts and actuator parts used in mobile phones, game machines, personal computers, in-vehicle cameras, mobile phone terminals and the like.
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Abstract
Description
また特許文献2の技術においては、より苛酷な環境下(例えば、より長期にわたって部品間で擦り合いが起こる環境下)において、やはり十分な耐発塵性を得ることはできなかった。
<1> ポリアリレート樹脂、ポリカーボネート樹脂、平均粒径が0.4~12μmであるシリカ粒子、平均粒径が0.5~20μmであるフッ素原子含有ポリマー粒子および一般式(I)で示される亜リン酸エステル化合物を含有し、
前記ポリアリレート樹脂と前記ポリカーボネート樹脂との質量比率が25/75~92/8であり、
前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して4~65質量部であり、
前記フッ素原子含有ポリマー粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して0.5~12質量部であり、
前記亜リン酸エステル化合物の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して0.008~1.2質量部である、樹脂組成物:
R1およびR2はそれぞれ独立して置換基を有していてもよい炭素原子数1~12のアルキル基を示す;
4つのR3はそれぞれ独立して炭素原子数1~5のアルキレン基を示す)。
<2> 前記樹脂組成物が、カーボンナノチューブを、ポリアリレート樹脂およびポリカーボネート樹脂の合計量100質量部に対して0.5~15質量部でさらに含有する、<1>に記載の樹脂組成物:
<3> 前記亜リン酸エステル化合物が一般式(I-1)で表される化合物である、<1>または<2>に記載の樹脂組成物:
<4> 前記樹脂組成物が、一般式(II)で示されるヒンダードフェノール化合物を、ポリアリレート樹脂およびポリカーボネート樹脂の合計量100質量部に対して0.01~1質量部でさらに含有する、<1>~<3>のいずれかに記載の樹脂組成物:
nはXに応じて決定される1以上の整数である;
R21およびR22はそれぞれ独立して水素原子または炭素原子数1~9のアルキル基を示す;
R23およびR24はそれぞれ独立して炭素原子数1~5のアルキレン基を示す)。
<5> 前記フッ素原子含有ポリマー粒子が未焼成フッ素原子含有ポリマー粒子である、<1>~<4>のいずれかに記載の樹脂組成物。
<6> 前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して4~50質量部である、<1>~<5>のいずれかに記載の樹脂組成物。
<7> 前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して8~62質量部であり、
前記シリカ粒子の平均粒径が2~12μmであり、
前記フッ素原子含有ポリマー粒子が未焼成フッ素原子含有ポリマー粒子である、<1>~<4>のいずれかに記載の樹脂組成物。
<8> 前記ポリアリレート樹脂と前記ポリカーボネート樹脂との質量比率が25/75~70/30であり、
前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して8~50質量部であり、
前記シリカ粒子の平均粒径が2~8μmであり、
前記亜リン酸エステル化合物の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して0.03~0.5質量部であり、
前記亜リン酸エステル化合物について、前記m1およびm2はそれぞれ独立して1~3の整数であり、前記R1およびR2はそれぞれ独立して置換基を有さない炭素原子数1~12のアルキル基を示し、前記4つのR3はそれぞれ独立して炭素原子数1~3のアルキレン基を示す、<7>に記載の樹脂組成物。
<9> 前記フッ素原子含有ポリマーが、ポリテトラフルオロエチレン、ポリビニリデンフルオライド、テトラフルオロエチレン・パーフルオロメチルビニルエーテル共重合体、テトラフルオロエチレン・ヘキサフルオロプロピレン共重合体、テトラフルオロエチレン・エチレン共重合体からなる群から選択される1種以上のポリマーである、<1>~<8>のいずれかに記載の樹脂組成物。
<10> <1>~<9>のいずれかに記載の樹脂組成物を含む成形品。
<11> 前記成形品がカメラモジュール部品である、<10>に記載の成形品。
<12> 前記成形品がレンズユニット部品である、<10>に記載の成形品。
<13> 前記成形品がアクチュエーター部品である、<10>に記載の成形品。
本発明の樹脂組成物は、耐発塵性、耐熱性、寸法安定性、摺動性および外観性に優れた成形品を成形できる。
本発明の樹脂組成物から成形された成形品は、機械的強度、特に曲げ強度にも優れている。
成形安定性とは、成形によっても樹脂の分子量が低下し難い特性をいう。
摺動性とは、成形品表面の滑らかさに関する特性であり、例えば、動摩擦係数が小さいほど良好であることを意味する特性である。
外観性とは、シリカ粒子等のフィラーが成形品表面に浮き出にくい特性であり、成形品が黒色を有する場合には、成形品表面がより黒く見える特性をいう。
寸法安定性とは、成形品が苛酷環境によっても寸法変化し難い特性をいう。
化合物(I-1-1):ビス(2,6-ジ-t-ブチル-4-メチルフェニル)ペンタエリスリトール-ジホスファイト;一般式(I-1)中、R11=R14=メチル基、R12=R15=tert-ブチル基、R13=R16=tert-ブチル基;
化合物(I-1-2):ビス(2,6-ジ-t-ブチル-4-エチルフェニル)ペンタエリスリトール-ジホスファイト;一般式(I-1)中、R11=R14=エチル基、R12=R15=tert-ブチル基、R13=R16=tert-ブチル基;
化合物(I-1-3):ビス(2,4,6-トリ-t-ブチルフェニル)スピロペンタエリスリトール-ジホスファイト;一般式(I-1)中、R11=R14=tert-ブチル基、R12=R15=tert-ブチル基、R13=R16=tert-ブチル基;
化合物(I-1-4):ビス(ノニルフェニル)ペンタエリスリトールジホスファイト;一般式(I)中、m1=m2=1、R1=R2=ノニル基、R3=メチレン基;
化合物(I-1-5):ビス(2,4-ジ-t-ブチルフェニル)ペンタエリスリトールジホスファイト;一般式(I-1)中、R11=R14=tert-ブチル基、R12=R15=tert-ブチル基、R13=R16=水素原子;
化合物(I-1-6):ビス(2,4-ジクミルフェニル)ペンタエリスリトールジホスファイト;一般式(I-1)中、R11=R14=α,α-ジメチルベンジル基、R12=R15=α,α-ジメチルベンジル基、R13=R16=水素原子。
化合物(I-1-6)は、例えば市販のドーバー・ケミカル・コーポレーション社製「Doverphos S-9228PC」等として入手可能である。
炭化水素基は炭素原子数1~20の1価または4価炭化水素基である。
1価の炭化水素基として、炭素原子数10~20、好ましくは15~20、より好ましくは16~18のアルキル基が挙げられる。そのようなアルキル基として、例えば、デシル基、ウンデシル基、ラウリル基、トリデシル基、ミリスチル基、ペンタデシル基、セチル基、ヘプタデシル基、ステアリル基、ノナデシル基、エイコシル基等が挙げられる。
4価の炭化水素基として、炭素原子1~2の飽和炭化水素基、好ましくは炭素原子が挙げられる。
エーテル基は、2価の基であり、具体的には「-O-」である。
好ましいXは炭化水素基、特に1価または4価炭化水素基である。
式(II-1)中、R23およびR24はそれぞれ、式(II)におけるR23およびR24と同様である。
式(II-2)中、R23は、式(II)におけるR23と同様である。
式(II-2)中、R25は、炭素原子数11~25、好ましくは16~23、より好ましくは16~20のアルキル基が挙げられる。より好ましいアルキル基として、例えば、セチル基、ヘプタデシル基、ステアリル基(=オクタデシル基)、ノナデシル基、エイコシル基等が挙げられる。
化合物(II-1-1):ペンタエリスリトールテトラキス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート;一般式(II-1)中、R21=R22=tert-ブチル基、R23=ジメチレン基、R24=メチレン基;
化合物(II-2-1):オクタデシル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート;一般式(II-2)中、R21=R22=tert-ブチル基、R23=ジメチレン基、R25=オクタデシル基。
化合物(II-2-1)は、例えば市販のBASF社製イルガノックス1076等として入手可能である。
・ポリアリレート樹脂;ユニチカ社製「U-パウダー」(極限粘度0.54):
・ポリカーボネート樹脂;住化ポリカーボネート社製「SDポリカ200-13」(極限粘度0.50):
・シリカ0.3;球状シリカ、デンカ社製「SFP-20M」(平均粒径0.3μm):
・シリカ0.5;球状シリカ、アドマテックス社製「SC2500-SXJ」(平均粒径0.5μm):
・シリカ5.0;球状シリカ、デンカ社製「FB-5SDC」(平均粒径5μm):
・シリカ10;球状シリカ、デンカ社製「FB-12D」(平均粒径10μm):
・シリカ15;球状シリカ、デンカ社製「FB-945」(平均粒径15μm):
・アルミナ3.0;球状アルミナ、デンカ社製「DAW-03」(平均粒径3μm):
・ポリテトラフルオロエチレン粒子2.0:ダイキン社製「ルブロン L-2」(平均粒径2μm)(未焼成物):
・ポリテトラフルオロエチレン粒子5.0:ダイキン社製「ルブロン L-5」(平均粒径5μm)(未焼成物):
・ポリテトラフルオロエチレン粒子30:AGC社製「フルオン L169J-S」(平均粒径30μm)(未焼成物):
・焼成ポリテトラフルオロエチレン粒子4.5:喜多村社製「KTL-8N」平均粒径4.5μm):
・多層カーボンナノチューブ;クムホペトロケミカル社製「K-NANOS-100T」(長さ平均26μm、径8~15nm):
・亜リン酸エステル化合物;ADEKA社製「PEP-36」;前記化合物(I-1-1):
・亜リン酸エステル化合物;ドーバー・ケミカル・コーポレーション社製「Doverphos S-9228PC」;前記化合物(I-1-6):
・亜リン酸エステル化合物;ADEKA社製「PEP-8」;以下の化学式により表される:
・離型剤;エミリーオレオケミカルズ社製「VPG-861」;飽和脂肪族ポリオールの脂肪酸エステル:
・顔料;カーボンブラック。
(1)曲げ強度
樹脂組成物を、射出成形機(東芝機械社製、型番:EC100N II)を用いて、樹脂温度340℃、成形サイクル30秒で成形し、ダンベル試験片を作製した。得られた試験片を用いて、JIS K7171に準じて測定した。強度は曲げ強度Sに基づいて以下の方法で評価した。
◎;102MPa≦S;
○;92MPa≦S<102MPa;
△;82MPa≦S<92MPa;(実用上問題なし)
×;S<82MPa。
(1)で得られた試験片を用いて、JIS K7191-1、K7191-2に準じ、荷重1.8MPaにて測定した。はんだ時の要求耐熱の面から、荷重たわみ温度が148℃以上あれば、実用上問題なしの範囲内である。耐熱性は荷重たわみ温度に基づいて以下の方法で評価した。
◎;152℃以上;
○;150℃以上152℃未満;
△;148℃以上150℃未満;(実用上問題なし)
×;148℃未満。
樹脂組成物を用いて、樹脂温度340℃、成形サイクル30秒で、外径30mm、内径26mm、厚さ2mmのリング型成形品を射出成形(サイドゲート1点)にて成形した。その後、高精度二次元測定器(キーエンス社製、型番:UM-8400)にて内径寸法を多点測定し、平均内径を求めた。そして、「-40℃×1時間」→「80℃×1時間」を1サイクルとし、合計30サイクル処理し、平均内径の変化率を求めた。この数値は、その値が小さいほど寸法安定性が良く、±0.10の範囲内である場合を寸法安定性は実用上問題なしであるとした。寸法安定性は変化率に基づいて以下の方法で評価した。
◎;±0.06;
○;±0.08;
△;±0.10;(実用上問題なし)
×;-0.1未満または+0.1超。
樹脂組成物を、射出成形機(日本製鋼所社製 J35AD)を用いて、樹脂温度340℃、成形サイクル900秒で成形し、図1のような試験片を作製し、下式に基づいて成形品の極限粘度の低下割合を求めた。この数値は、その値が小さいほど、成形安定性に優れ、10%未満を成形安定性が実用上問題なしとした。
○;7%未満;
△;10%未満;(実用上問題なし)
×;10%以上。
樹脂組成物を、射出成形機(日本製鋼所社製 J35AD)を用いて、樹脂温度340℃、成形サイクル30秒で成形し、図1のような試験片を作製した。得られた試験片の表面外観を目視で下記基準により判断した。
◎:シリカ粒子が成形品表面に全く浮き出ることなく、また白く見えることはなく、表面が完全に平滑である;
○:シリカ粒子が成形品表面に僅かに浮き出るものの、白く見えることはなく、表面が平滑である;
△:シリカ粒子が成形品表面に僅かに浮き出るものの、僅かに白く見えるだけで、表面が平滑である(実用上問題なし);
×:シリカ粒子が成形品表面に浮き出ており、白く見えるとともに、表面が平滑ではない。
樹脂組成物を、射出成形機(日本製鋼所社製 J35AD)を用いて、樹脂温度340℃、成形サイクル30秒で成形し、図1のような試験片を作製した。
この試験片100個を、ステンレス製容器(内径70mm、高さ180mm)に入れ、ヤマト科学社製シェーカーSA300にセットし、300回/分の振動を24時間与えた。24時間経過後、容器より成形品を取り出し、下式に基づいて発塵割合を求めた。この数値は、その値が小さいほど、耐発塵性に優れ、0.1%未満を耐発塵性が実用上問題なしとした。試験後の試験片100個の合計質量は、表面に付着した塵等をエアー洗浄により除去した後の質量である。
○;0.07%未満;
△;0.10%未満;(実用上問題なし)
×;0.10%以上。
樹脂組成物を、射出成形機(東芝機械社製、型番:EC100N II)を用いて、樹脂温度340℃、成形サイクル30秒で成形し、板状試験片(縦70mm×横40mm×厚さ2mmt)を作製した。
JIS K7218 A法に準拠して、鈴木式連続摩擦磨耗試験機(安田精機製作所製、型式No.283-S-PC)を使用して、速度0.1m/s、荷重0.5MPa条件下、動摩擦係数の測定を行った。板状試験片に対し、摺動相手材(S45Cリング、外径φ25.6mm、内径φ20mm、長さ15mm)を回転させた。動摩擦係数は0.3以下を「実用上問題なし」と判断した。
○;0.27以下;
△;0.30以下(実用上問題なし);
×;0.30超。
樹脂組成物を、射出成形機(東芝機械社製、型番:EC100N II)を用いて、樹脂温度340℃、成形サイクル30秒で成形し、円板試験片を作製した。得られた試験片を、デジタル超高抵抗/微少電流計(アドバンテスト製R8340A)を使用して、表面抵抗率を測定した。1011Ω以下を帯電防止性能ありとした。成形体での塵埃付着抑制のためには、表面抵抗率は1011Ω以下であることが好ましい。
○;1010Ω以下;
△;1011Ω以下;
×;1011Ω超。
各原料を、表1~表4に示す配合割合で、同方向2軸押出機(東芝機械社製、型番:TEM-37BS)を用いて、バレル温度320℃で溶融混練をおこなった。ノズルからストランド状に引き取った樹脂組成物を水浴に浸漬して冷却固化し、ペレタイザーでカッティングした後、120℃で12時間熱風乾燥することによって、樹脂組成物(ペレット)を得た。
実施例13~18の樹脂組成物は、さらに帯電防止性能が優れていた。
比較例2の樹脂組成物では、ポリアリレート樹脂とポリカーボネート樹脂との質量比率について、ポリアリレート樹脂の比率が高すぎるため、流動性が悪く、成形できなかった。
比較例3の樹脂組成物では、シリカ粒子の含有量が少なすぎるため、寸法安定性が低下した。
比較例4の樹脂組成物では、シリカ粒子の含有量が多すぎるため、溶融混練時において押出しによるペレット化が困難になった。
比較例5の樹脂組成物では、シリカ粒子の平均粒径が大きすぎるため、寸法安定性が低下した。
比較例6および7の樹脂組成物では、特定の亜リン酸エステル化合物の含有量が少なすぎるか、または多すぎるため、成形安定性および耐発塵性が低下した。
比較例8の樹脂組成物では、特定の亜リン酸エステル化合物とは種類が異なる亜リン酸エステル化合物を用いるため、成形安定性および耐発塵性が低下した。
比較例9の樹脂組成物では、シリカ粒子の代わりにアルミナ粒子が含まれるため、寸法安定性が低下した。
比較例10および14の樹脂組成物では、特定の亜リン酸エステル化合物が含まれないため、成形安定性および耐発塵性が低下した。
比較例11の樹脂組成物では、フッ素原子含有ポリマー粒子を用いないため、耐発塵性および摺動性が低下した。
比較例12の樹脂組成物では、フッ素原子含有ポリマー粒子の含有量が多すぎたため、成形安定性が低下した。
比較例13の樹脂組成物では、フッ素原子含有ポリマー粒子の平均粒径が大きすぎたため、成形安定性が低下した。
Claims (13)
- ポリアリレート樹脂、ポリカーボネート樹脂、平均粒径が0.4~12μmであるシリカ粒子、平均粒径が0.5~20μmであるフッ素原子含有ポリマー粒子および一般式(I)で示される亜リン酸エステル化合物を含有し、
前記ポリアリレート樹脂と前記ポリカーボネート樹脂との質量比率が25/75~92/8であり、
前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して4~65質量部であり、
前記フッ素原子含有ポリマー粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して0.5~12質量部であり、
前記亜リン酸エステル化合物の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して0.008~1.2質量部である、樹脂組成物:
R1およびR2はそれぞれ独立して置換基を有していてもよい炭素原子数1~12のアルキル基を示す;
4つのR3はそれぞれ独立して炭素原子数1~5のアルキレン基を示す)。 - 前記樹脂組成物が、カーボンナノチューブを、ポリアリレート樹脂およびポリカーボネート樹脂の合計量100質量部に対して0.5~15質量部でさらに含有する、請求項1に記載の樹脂組成物。
- 前記フッ素原子含有ポリマー粒子が未焼成フッ素原子含有ポリマー粒子である、請求項1~4のいずれかに記載の樹脂組成物。
- 前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して4~50質量部である、請求項1~5のいずれかに記載の樹脂組成物。
- 前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して8~62質量部であり、
前記シリカ粒子の平均粒径が2~12μmであり、
前記フッ素原子含有ポリマー粒子が未焼成フッ素原子含有ポリマー粒子である、請求項1~4のいずれかに記載の樹脂組成物。 - 前記ポリアリレート樹脂と前記ポリカーボネート樹脂との質量比率が25/75~70/30であり、
前記シリカ粒子の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して8~50質量部であり、
前記シリカ粒子の平均粒径が2~8μmであり、
前記亜リン酸エステル化合物の含有量が前記ポリアリレート樹脂および前記ポリカーボネート樹脂の合計量100質量部に対して0.03~0.5質量部であり、
前記亜リン酸エステル化合物について、前記m1およびm2はそれぞれ独立して1~3の整数であり、前記R1およびR2はそれぞれ独立して置換基を有さない炭素原子数1~12のアルキル基を示し、前記4つのR3はそれぞれ独立して炭素原子数1~3のアルキレン基を示す、請求項7に記載の樹脂組成物。 - 前記フッ素原子含有ポリマーが、ポリテトラフルオロエチレン、ポリビニリデンフルオライド、テトラフルオロエチレン・パーフルオロメチルビニルエーテル共重合体、テトラフルオロエチレン・ヘキサフルオロプロピレン共重合体、テトラフルオロエチレン・エチレン共重合体からなる群から選択される1種以上のポリマーである、請求項1~8のいずれかに記載の樹脂組成物。
- 請求項1~9のいずれかに記載の樹脂組成物を含む成形品。
- 前記成形品がカメラモジュール部品である、請求項10に記載の成形品。
- 前記成形品がレンズユニット部品である、請求項10に記載の成形品。
- 前記成形品がアクチュエーター部品である、請求項10に記載の成形品。
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- 2020-10-12 EP EP20877112.1A patent/EP4047046A4/en not_active Withdrawn
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