WO2009084555A1 - 熱可塑性樹脂組成物、及びその成形体 - Google Patents
熱可塑性樹脂組成物、及びその成形体 Download PDFInfo
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- WO2009084555A1 WO2009084555A1 PCT/JP2008/073508 JP2008073508W WO2009084555A1 WO 2009084555 A1 WO2009084555 A1 WO 2009084555A1 JP 2008073508 W JP2008073508 W JP 2008073508W WO 2009084555 A1 WO2009084555 A1 WO 2009084555A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/068—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F293/00—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
- C08F293/005—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent
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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
- 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
- C08L27/04—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 chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D153/00—Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
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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
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
Definitions
- the present invention relates to a thermoplastic resin composition capable of improving the strength and surface gloss of a molded product, and the molded product.
- Vinyl chloride-based resins are inexpensive and have excellent mechanical strength, weather resistance, and chemical resistance, and are therefore used in various applications including building materials and housing materials. However, since a vinyl chloride resin alone cannot have a sufficient impact strength, a method of adding a graft copolymer obtained by an emulsion polymerization method or the like as an impact resistance improver is currently widely used.
- a method of improving the impact resistance for example, a method of adding a diene-based or acrylate-based soft rubber-containing graft copolymer is disclosed.
- Patent Documents 1 and 2 the specific viscosity ( ⁇ sp) determined by measuring a 0.2 g / 100 ml acetone solution of a core-shell polymer composition soluble in methanol and insoluble in methanol at 30 ° C. is 0.19.
- a graft copolymer having a polymer chain having a high molecular weight as a graft component and a shell part as an accompanying free polymer has been disclosed, but the weather resistance, impact resistance, and secondary processability are improved. However, it does not touch on the effect of improving the gloss of the molded product, and is not sufficient as a method for increasing both gloss and impact resistance.
- Patent Document 3 discloses improvement in impact resistance by a graft copolymer containing polyethylene glycol dimethacrylate having a main chain composed of —CH 2 —CH 2 —O— as a repeating unit as a polyfunctional crosslinking agent.
- the effect of improving the gloss of the molded article is not mentioned, and it is not sufficient as a method for increasing both the gloss and the impact resistance described above in the same manner as in Patent Documents 1 and 2, and The impact resistance is not sufficient.
- the vinyl chloride resin composition for the building materials field contains fillers such as calcium carbonate. Although it is possible to improve the surface gloss to some extent by reducing this amount, the cost increases. This is not preferable. Although the surface gloss is improved by raising the molding temperature, there are many problems such as thermal decomposition of vinyl chloride. In addition, gloss can be improved by using a copolymer containing methyl methacrylate as a main component as a processing aid, but there is also a problem that torque increases due to an increase in melt viscosity and impact resistance also decreases. .
- An object of the present invention is to propose a thermoplastic resin composition capable of improving the strength and surface gloss of a molded product, and a molded product thereof.
- the present invention provides a thermoplastic resin composition comprising 100 parts by weight of the thermoplastic resin (a) and 0.5-30 parts by weight of the core-shell polymer composition (b), wherein the core-shell polymer composition (b ) Is obtained by polymerizing the shell component in the presence of the core obtained by polymerizing the core component, and the core component is an alkyl acrylate having an alkyl group having 2 to 18 carbon atoms.
- a monomer mixture comprising 95% by weight, 0.05 to 10% by weight of a polyfunctional monomer, and 0 to 20% by weight of monomers copolymerizable therewith, consisting of a total of 100% by weight, and
- the polyfunctional monomer is one or more selected from the group consisting of polypropylene glycol diacrylate and polypropylene glycol dimethacrylate, and methyl ethyl of the core-shell polymer composition
- the molecular weight of the insoluble components in the soluble melt-One methanol tons relates to a thermoplastic resin composition, characterized in that at least 500,000.
- the average number of repeating units of propylene glycol units of the polyfunctional monomer contained in the core component of the core-shell polymer composition (b) is 2 or more, It relates to the thermoplastic resin composition described.
- the average number of repeating units of propylene glycol units of the polyfunctional monomer contained in the core component of the core-shell polymer composition (b) is less than 12, It relates to the thermoplastic resin composition described.
- the total amount of the core-shell polymer composition (b) is 100% by weight, and the core component is 50 to 95% by weight and the shell component is 5 to 50% by weight.
- the thermoplastic resin composition according to any one of the above.
- thermoplastic resin composition according to any one of the above, wherein the thermoplastic resin (a) is a vinyl chloride resin.
- a preferred embodiment relates to a molded product obtained by molding the thermoplastic resin composition described above.
- Preferred embodiments relate to the above-described molded body, wherein the molded body is a window frame or a door frame.
- graft copolymer of the present invention When the graft copolymer of the present invention is blended in a thermoplastic resin typified by vinyl chloride as an impact resistance improver, high impact resistance and good surface gloss can be obtained.
- a thermoplastic resin typified by vinyl chloride
- thermoplastic resin composition of the present invention is a thermoplastic resin composition comprising 100 parts by weight of the thermoplastic resin (a) and 0.5 to 30 parts by weight of the core-shell polymer composition (b).
- the content of the core-shell polymer composition (b) is required to be 0.5 to 30 parts by weight from the viewpoint of quality and cost, but preferably 0.5 to 20 parts by weight. When the content exceeds 30 parts by weight, the effect of improving the impact resistance is sufficient, but the quality other than that, for example, the molding processability may be lowered and the cost may be increased.
- additives such as antioxidants, stabilizers, ultraviolet absorbers, pigments, antistatic agents, lubricants, processing aids, and the like may be added as appropriate to the thermoplastic resin composition of the present invention. it can.
- Such a molded body formed using the thermoplastic resin composition of the present invention as a material can be suitably used for a window frame or a door frame.
- Vinyl chloride resin is generally used with a stabilizer added to prevent deterioration (discoloration and deterioration of mechanical and electrical properties) due to dehydrochlorination reaction due to heat, ultraviolet rays, oxygen, etc. during processing or use.
- a stabilizer added to prevent deterioration (discoloration and deterioration of mechanical and electrical properties) due to dehydrochlorination reaction due to heat, ultraviolet rays, oxygen, etc. during processing or use.
- Such stabilizers are mainly classified into lead compound stabilizers, metal soap stabilizers, organotin stabilizers, etc. Among them, lead compounds that are excellent in thermal stability and electrical insulation and inexpensive. Many system stabilizers are used. However, in recent years, there has been a movement to refrain from using lead compound stabilizers for the purpose of health and environmental protection in applications where people touch products such as building materials and housing materials.
- the stabilizer described above is preferably one or more selected from lead compounds, organic tins, and metal soaps, but from the viewpoint of health and environmental conservation, organic tins and metal soaps are preferred. Of these metal soaps, CaZn is preferable.
- thermoplastic resin (a) is preferably a vinyl chloride resin, a (meth) acrylic resin, a styrene resin, a carbonate resin, an amide resin, an ester resin, an olefin resin, or the like.
- the vinyl chloride resin means a vinyl chloride homopolymer or a copolymer containing at least 70% by weight of units derived from vinyl chloride.
- the core-shell polymer composition (b) is obtained by polymerizing a shell constituent in the presence of a core obtained by polymerizing the core constituent.
- the ratio of the core component to the shell component is such that, from the viewpoint of obtaining good impact resistance and good surface gloss, the total amount of the core-shell polymer composition (b) is 100% by weight. 95% by weight, shell component 5 to 50% by weight is preferable, core component 60 to 90% by weight, shell component 10 to 40% by weight is more preferable, core component 70 to 85% by weight, shell component 15 to 30% by weight is particularly preferred.
- Such a core-shell polymer composition (b) can be produced by, for example, an emulsion polymerization method, a suspension polymerization method, a microsuspension polymerization method, a miniemulsion polymerization method, an aqueous dispersion polymerization method, etc. From the viewpoint of easy control, those produced by an emulsion polymerization method can be suitably used.
- the latex and particles of the core-shell polymer thus obtained are subjected to coagulation treatment such as salting out and acid precipitation as necessary, and then subjected to heat treatment, washing, dehydration, and drying steps to form a powder. Collected.
- the method for recovering such powder is not limited to the above, and for example, it can also be recovered by spray-drying the core-shell polymer latex.
- the core-shell polymer composition (b) can contain an anti-fusing agent for the purpose of improving the blocking resistance between the powders, and includes an anionic surfactant polyvalent metal salt, inorganic particles, A crosslinked polymer and / or silicone oil can be preferably used.
- an anionic surfactant polyvalent metal salt, inorganic particles, A crosslinked polymer and / or silicone oil can be preferably used.
- the polyvalent metal salt of the anionic surfactant include, but are not limited to, higher fatty acid salts, higher alcohol sulfates, alkylaryl sulfonates, and the like.
- the inorganic particles include calcium carbonate and silicon dioxide, but are not limited thereto.
- the core of the core-shell polymer composition (b) according to the present invention has a particle size of 0 in order to exhibit good impact resistance particularly when a vinyl chloride resin is used as the thermoplastic resin (a). .05 to 0.3 ⁇ m is preferable.
- Such a core according to the present invention comprises, as a core component, 70 to 99.95% by weight of an alkyl acrylate having an alkyl group having 2 to 18 carbon atoms, 0.05 to 10% by weight of a polyfunctional monomer, And 0 to 20% by weight of a monomer copolymerizable therewith, and a total of 100% by weight of the monomer mixture, and the polyfunctional monomer is obtained by polymerizing polypropylene glycol diacrylate. And one or more selected from the group consisting of polypropylene glycol dimethacrylate.
- a methyl group is branched in a main chain composed of a repeating unit composed of C—C—O represented by the following general formula 1, and its mechanism
- the average number of repeating units of the propylene glycol chain is preferably 2 or more, and preferably less than 12.
- the core according to the present invention that functions as the rubber particles dispersed in the matrix of the thermoplastic resin (a), although the mechanism is not clear, cross-linking with high impact resistance improvement effect is realized.
- the core-shell polymer composition (b) having a high surface gloss improvement effect is obtained for the following reason.
- the number of repeating units of the propylene glycol chain is particularly preferably 3 to 8.
- the shell component when the shell component is polymerized in the presence of the core obtained by polymerizing the polyfunctional monomer according to the present invention having the above-described characteristics as the core component, the mechanism is not clear, but the shell component Tends to be a high molecular weight polymer, and such a high molecular weight polymer does not graft onto the core, and the high molecular weight polymer itself is used as a core-shell polymer composition (b) according to the present invention. Therefore, it is considered that high impact resistance and high surface gloss, which are the effects of the present invention, can be obtained at the same time.
- the above-described features of the high molecular weight and free polymerization of the shell constituent polymer are the two double bonds that contribute to the crosslinking of the polyfunctional monomer according to the present invention during the shell constituent polymerization. Because the reactivity is considered to be equivalent, the graft point at which the shell is grafted to the core is reduced, for example, compared to the case where non-functional polyfunctional monomers such as allyl methacrylate are used. It is inferred.
- the weight average molecular weight of the free polymer according to the present invention needs to be 500,000 or more, preferably 1 to 4 million, and preferably 1.2 to 2.5 million in order to develop a good gloss of the molded product. More preferably, this free polymer is a component that is soluble in methyl ethyl ketone and insoluble in methanol of the core-shell polymer composition (b) according to the present invention. That is, a polystyrene equivalent weight average molecular weight obtained by gel permeation chromatography (GPC) of the free polymer according to the present invention obtained by the method described in (Measurement of free polymer molecular weight) described later can be determined by those skilled in the art. It was obvious that the molecular weight of the graft component of the core-shell polymer composition (b) according to the present invention was evaluated by measuring the weight average molecular weight of the free polymer component that was not measured. is there.
- GPC gel permeation chromatography
- the shell constituent component according to the present invention includes 50 to 100% by weight of methyl methacrylate, 0 to 50% by weight of alkyl acrylate having an alkyl group having 2 to 18 carbon atoms, and these It is preferable that the total amount is 100% by weight, with 0 to 20% by weight of the monomers copolymerizable therewith.
- alkyl acrylate having an alkyl group having 2 to 18 carbon atoms examples include, for example, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and 4-hydroxybutyl acrylate. , Octyl acrylate, dodecyl acrylate, stearyl acrylate and the like are exemplified as representative examples.
- Monomers that can be copolymerized with the core component or shell component described above include alkyl methacrylates having an alkyl group, alkyl methacrylates having a hydroxyl group, or an alkoxyl group, vinyl arenes, and vinyl carboxyls.
- alkyl methacrylates having an alkyl group alkyl methacrylates having a hydroxyl group, or an alkoxyl group
- vinyl arenes vinyl carboxyls.
- One or more selected from the group consisting of acids, vinylcyanides, vinyl halides, vinyl acetate and alkenes are preferred.
- alkyl methacrylates having an alkyl group examples include methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl methacrylate, dodecyl methacrylate, stearyl methacrylate, and behenyl methacrylate.
- vinyl arenes examples include styrene, ⁇ -methyl styrene, monochloro styrene, dichloro styrene and the like.
- Examples of the vinyl carboxylic acids include acrylic acid and methacrylic acid, examples of the vinyl cyanates include acrylonitrile and methacrylonitrile, and examples of the vinyl halides include vinyl chloride, vinyl bromide, and chloroprene.
- Alkenes include ethylene, propylene, butylene, butadiene, isobutylene and the like.
- a conjugated diene monomer from the viewpoint of weather resistance, it is preferable not to contain a conjugated diene monomer.
- these may be used independently and may use 2 or more types together.
- Example 1 (Preparation of core-shell polymer composition A-1) A glass reactor having a thermometer, a stirrer, a reflux condenser, a nitrogen inlet, and a monomer and emulsifier addition device was charged with 2500 g of deionized water and 60 g of a 1.0 wt% sodium lauryl sulfate aqueous solution, and a nitrogen stream The temperature was raised to 50 ° C. with stirring.
- an emulsified liquid monomer comprising 10 g of butyl acrylate (hereinafter referred to as BA), 10 g of styrene (hereinafter referred to as St), 4 g of a 10 wt% sodium lauryl sulfate aqueous solution, and 12 g of deionized water.
- BA butyl acrylate
- St styrene
- St styrene
- KPS potassium persulfate
- BA the average number of repeating units of propylene glycol chains are 12 (the molecular weight of the repeating portion is about 700).
- MMA methyl methacrylate
- BA methyl methacrylate
- thermoplastic resin composition C-1 100 parts by weight of vinyl chloride resin (Kanevinyl S-1001, manufactured by Kaneka Corp.), 1.5 parts by weight of methyl tin mercapto stabilizer (TM-181FSJ, manufactured by Katsuta Chemical Co., Ltd.) Paraffin wax (Rheolub165, manufactured by Rheochem) 1.0 part by weight, calcium stearate (SC-100, manufactured by Sakai Chemical Co., Ltd.) 1.2 parts by weight, polyethylene oxide wax (ACPE-629A, Allied Signal Co., Ltd.) 0.1 parts by weight, calcium carbonate (Hydrocarb 95T, manufactured by Omya Co., Ltd.) 5.0 parts by weight, titanium oxide (TITON R-62N, manufactured by Sakai Chemical Co., Ltd.), 10 parts by weight, processing aid (Kaneace PA) -20, manufactured by Kaneka Corporation) 1.5 parts by weight and 5.0 parts by weight of white shell powder B of the core-shell polymer composition A-1
- molding temperature condition C1 / C2 / C3 / C4 / AD / D1 / D2 / D3 is obtained by using the thermoplastic resin composition C-1 obtained above.
- the surface gloss was evaluated by calculating the average value of the reflectance of 60 ° rays on the upper and lower surfaces of the obtained window frame molding.
- thermoplastic resin composition C-1 was roll press molded (roll temperature 180 ° C., press temperature 190 ° C.), and a test piece was cut out from the obtained molded body, and the Izod strength was measured.
- thermoplastic resin composition B-1 obtained above 2 g
- methyl ethyl ketone which is a free polymer extraction solvent
- centrifuged After centrifugation, the methyl ethyl ketone solution concentrated to about 10 g of the supernatant from which the insoluble precipitate has been removed is added to 200 ml of methanol, and after adding a small amount of calcium chloride aqueous solution and stirring, the precipitate crystallized as a component insoluble in methanol.
- the free polymer was recovered.
- the obtained free polymer was taken out by filtration, and a free polymer tetrahydrofuran solution in which about 20 mg of the free polymer was dissolved in 10 ml of tetrahydrofuran was precipitated with HLC-8220GPC (manufactured by Tosoh Corp.). The weight average molecular weight of the soluble and insoluble component in methanol) was measured.
- the column was a polystyrene gel column TSKgel SuperHZM-H (manufactured by Tosoh Corporation) and analyzed in terms of polystyrene using tetrahydrofuran as the eluent.
- Example 2 Preparation of core-shell polymer composition A-2
- PPG # 700DMA polypropylene glycol dimethacrylate
- a core-shell polymer composition A-2 was produced in the same manner as in Example 1 except for the above.
- the volume average particle size of the acrylate polymer serving as the core was 0.20 ⁇ m, and the polymerization conversion rate of the monomer component forming the acrylate polymer was 99.6%.
- a latex of the core-shell polymer composition A-2 comprising 75% by weight of the core component and 25% by weight of the shell component was obtained.
- the polymerization conversion rate of the total monomer components after completion of the polymerization was 99.9%.
- thermoplastic resin composition C-2 was obtained in the same manner as in Example 1 except that 5.0 parts by weight of the white resin powder B-2 of the core-shell polymer composition A-2 was used.
- thermoplastic resin composition C-2 (Preparation and evaluation of molded products) Using the obtained thermoplastic resin composition C-2, a window frame molding was prepared in the same manner as in Example 1, and the surface gloss, Gardner strength, and Izod strength were also in the same manner as in Example 1. Was evaluated.
- Example 1 Preparation of core-shell polymer composition A-3
- a core-shell polymer composition A-3 was produced in the same manner as in Example 1 except that 4.0 g of allyl methacrylate (hereinafter referred to as AMA) was used instead of 26.6 g of PPG # 700DA.
- the volume average particle size of the acrylate polymer serving as the core was 0.20 ⁇ m, and the polymerization conversion rate of the monomer component forming the acrylate polymer was 99.8%.
- a latex of the core-shell polymer composition A-3 comprising 75% by weight of the core component and 25% by weight of the shell component was obtained.
- the polymerization conversion rate of the total monomer components after completion of the polymerization was 99.7%.
- B-3 of core-shell polymer composition A-3 B-3 was obtained as a core-shell polymer composition A-3 of white resin powder in the same manner as in Example 1 except that the latex of the core-shell polymer composition A-3 was used.
- thermoplastic resin composition C-3 was obtained in the same manner as in Example 1 except that 5.0 parts by weight of the white resin powder B-3 of the core-shell polymer composition A-3 was used.
- thermoplastic resin composition C-3 Using the obtained thermoplastic resin composition C-3, a window frame molded body was prepared in the same manner as in Example 1, and the surface gloss, Gardner strength, and Izod strength in the same manner as in Example 1. was evaluated.
- thermoplastic resin composition C-3 (Measurement of free polymer molecular weight) Using the thermoplastic resin composition C-3, the weight average molecular weight of a component soluble in methyl ethyl ketone and insoluble in methanol was measured in the same manner as in Example 1.
- Table 1 shows the structure of the core-shell polymer composition obtained in Examples 1 and 2 and Comparative Example 1, and the evaluation results of the molded product obtained by blending it with the thermoplastic resin, that is, surface gloss, Gardner The measurement results of strength and Izod strength are shown.
- the core-shell polymer composition (b) was found to have an alkyl acrylate having an alkyl group having 2 to 18 carbon atoms and a polyfunctionality of 70 to 99.95% by weight.
- a core obtained by polymerizing a monomer mixture (total 100% by weight) consisting of 0.05 to 10% by weight of monomers and 0 to 20% by weight of monomers copolymerizable therewith
- the core-shell polymer composition is obtained by polymerizing a shell constituent and the polyfunctional monomer is at least one selected from the group consisting of polypropylene glycol diacrylate and polypropylene glycol dimethacrylate.
- the molecular weight of the component (b) soluble in methyl ethyl ketone and insoluble in methanol is 500,000 or more, high impact resistance and good surface gloss of the molded article can be obtained. It can be seen.
- Examples 3 to 6 Preparation of core-shell polymer compositions AA3 to AA6)
- polypropylene glycol diacrylate having an average number of repeating units of propylene glycol chain of 2, 3, 7, 12 is approximately 100, 200, 400, 700.
- core-shell polymer compositions AA3, AA4, AA5, and AA6 were prepared as Examples 3, 4, 5, and 6, respectively.
- the volume average particle diameter of the acrylate polymer serving as the core is 0.20 ⁇ m, and the polymerization conversion rate of the monomer component forming the acrylate polymer is 99.5. %Met.
- latexes of core-shell polymer compositions AA3 to AA6 each comprising 75% by weight of the core component and 25% by weight of the shell component were obtained.
- the polymerization conversion rate of the total monomer components after completion of the polymerization was 99.6%.
- a white resin powder core-shell polymer composition A-A3 to A-A6 as B-A3 was prepared in the same manner as in Example 1 except that the latex of the core-shell polymer composition A-A3 to A-A6 was used. Obtained B-A6.
- thermoplastic resin compositions C-A3 to C-A6 were obtained in the same manner as in Example 1 except that white resin powders B-A3 to B-A6 were used instead of the white resin powder B-1. .
- thermoplastic resin compositions C-A3 to C-A6 were used instead of the thermoplastic resin composition C-1.
- Surface gloss, Gardner strength, and Izod strength were evaluated in the same manner as in Example 1.
- Table 2 shows the types of polyfunctional monomers used in Examples 3 to 6, that is, the types of crosslinking agents, and the evaluation results of the resulting molded articles, that is, surface gloss, Gardner strength, and Izod strength. The measurement results are shown.
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Abstract
Description
本発明の熱可塑性樹脂組成物は、熱可塑性樹脂(a)100重量部、及びコアシェル重合体組成物(b)0.5~30重量部を含む熱可塑性樹脂組成物である。前記コアシェル重合体組成物(b)の含有量は、品質面、およびコスト面から0.5~30重量部であることを要するが、好ましくは0.5~20重量部である。前記含有量が30重量部を超える場合には、耐衝撃性の改良効果は充分であるが、それ以外の品質、例えば成形加工性の低下や、コストが上昇する場合がある。
塩化ビニル樹脂は一般に、加工時あるいは使用時の熱や紫外線、酸素などによる脱塩化水素反応による劣化(変色、および機械的・電気的特性の低下)を防ぐ目的から、安定剤を添加して使用されている。このような安定剤は主に、鉛化合物系安定剤、金属石鹸系安定剤、有機錫系安定剤などに分類されるが、なかでも熱安定性や電気絶縁性に優れ、かつ安価な鉛化合物系安定剤が多く使用されている。ところが、近年、建材や住宅資材など、製品に人間が触れるような用途においては、健康や環境保全の目的から、鉛化合物系安定剤の使用を控える動きが見られるようになってきており、その代替安定剤として、金属石鹸系安定剤のうち、特に無毒性のCaZn系安定剤が使用されるようになってきている。従い、上述した安定剤としては、鉛化合物系、有機錫系、金属石鹸系から選ばれる1種以上が好ましいが、健康や環境保全の観点からは、有機錫系、金属石鹸系が好ましく、特に好ましくは金属石鹸系のなかでもCaZn系が好ましい。
本発明に係る熱可塑性樹脂(a)は、好ましくは、塩化ビニル系樹脂、(メタ)アクリル系樹脂、スチレン系樹脂、カーボネート系樹脂、アミド系樹脂、エステル系樹脂、オレフィン系樹脂等である。
本発明に係るコアシェル重合体組成物(b)は、コア構成成分を重合して得られるコアの存在下に、シェル構成成分を重合して得られる。コア構成成分とシェル構成成分との比率は、良好な耐衝撃性、かつ、良好な表面光沢を得る観点から、コアシェル重合体組成物(b)全体量を100重量%として、コア構成成分50~95重量%、シェル構成成分5~50重量%が好ましく、コア構成成分60~90重量%、シェル構成成分10~40重量%がより好ましく、コア構成成分70~85重量%、シェル構成成分15~30重量%が特に好ましい。
本発明に係るコアシェル重合体組成物(b)のコアは、その粒子径が、特に熱可塑性樹脂(a)として塩化ビニル系樹脂を用いたときに良好な耐衝撃性を発現するために、0.05~0.3μmであることが好ましい。
本発明に係る前記フリーポリマーの重量平均分子量は、良好な成形体の光沢を発現するために、50万以上であることを要し、100~400万が好ましく、120~250万であることがさらに好ましく、このフリーポリマーは、本発明に係るコアシェル重合体組成物(b)のメチルエチルケトンに可溶かつメタノールに不溶な成分である。即ち、後述する(フリーポリマー分子量の測定)に記載の方法によって得られる、本発明に係るフリーポリマーのゲル・パーミエーション・クロマトグラフィー(GPC)によるポリスチレン換算重量平均分子量は、当業者ならこれが、グラフトしなかったフリーポリマー成分の重量平均分子量であって、これを代替的に測定することで、本発明に係るコアシェル重合体組成物(b)のグラフト成分の分子量を評価していることは明らかである。
本発明に係るシェル構成成分は、良好な成形体の表面光沢を得る観点から、メチルメタクリレート50~100重量%、炭素数が2~18のアルキル基を有するアルキルアクリレート0~50重量%、及びこれらと共重合可能な単量体0~20重量%、合計100重量%からなることが好ましい。
上述したコア構成成分、又は、シェル構成成分である炭素数が2~18のアルキル基を有するアルキルアクリレートとしては、例えば、エチルアクリレート、プロピルアクリレート、ブチルアクリレート、2-エチルヘキシルアクリレート、4-ヒドロキシブチルアクリレート、オクチルアクリレート、ドデシルアクリレート、ステアリルアクリレート等が代表的なものとして例示される。
上述したコア構成成分、又は、シェル構成成分であるこれらと共重合可能な単量体としては、アルキル基を有するアルキルメタクリレート、ヒドロキシル基、又はアルコキシル基を有するアルキルメタクリレート類、ビニルアレーン類、ビニルカルボン酸類、ビニルシアン類、ハロゲン化ビニル類、酢酸ビニル、アルケン類からなる群から選ばれる1種以上であることが好ましい。
(コアシェル重合体組成物A-1の作製)
温度計、攪拌機、還流冷却器、窒素流入口、単量体と乳化剤の添加装置を有するガラス反応器に、脱イオン水2500g、1.0重量%濃度のラウリル硫酸ナトリウム水溶液60gを仕込み、窒素気流中で攪拌しながら50℃に昇温した。
コアシェル重合体組成物(A-1)のラテックスを、2重量%濃度の塩化カルシウム水溶液6000gに添加し、凝固ラテックス粒子を含むスラリーを得た。その後、その凝固ラテックス粒子スラリーを95℃まで昇温し、脱水、乾燥させることにより、白色樹脂粉末のコアシェル重合体組成物A-1としてB―1を得た。
塩化ビニル樹脂(カネビニルS-1001、(株)カネカ製)100重量部、有機錫系安定剤であるメチル錫メルカプト系安定剤(TM-181FSJ、(株)勝田化工製)1.5重量部、パラフィンワックス(Rheolub165、(株)Rheochem製)1.0重量部、ステアリン酸カルシウム(SC-100、(株)堺化学製)1.2重量部、酸化ポリエチレンワックス(ACPE-629A、(株)アライドシグナル製)0.1重量部、炭酸カルシウム(Hydrocarb95T、(株)Omya製)5.0重量部、酸化チタン(TITON R-62N、(株)堺化学製)10重量部、加工助剤(カネエースPA-20、(株)カネカ製)1.5重量部、及び5.0重量部のコアシェル重合体組成物A-1の白色樹脂粉末B-1をヘンシェルミキサーにてブレンドして熱可塑性樹脂組成物C-1を得た。
上記で得られた熱可塑性樹脂組成物C-1を、65mm異方向パラレル二軸押出機(Battenfeld社製)を用いて、成形温度条件C1/C2/C3/C4/AD/D1/D2/D3/D4=195℃/195℃/193℃/190℃/190℃/200℃/200℃/200℃/200℃(C1~C4はシリンダー温度、ADはアダプター温度、D1~D4はダイス温度)、スクリュー回転数20rpm、フィーダー回転数95rpm、吐出量100kg/hrの条件にて、窓枠成形した。
上記で得られた熱可塑性樹脂組成物B-1、2gをフリーポリマーの抽出溶媒であるメチルエチルケトン約100gに膨潤させ、遠心分離を実施した。遠心分離後、不溶沈殿物を取り除いた上澄みを約10gになるまで濃縮したメチルエチルケトン溶液をメタノール200ml中に添加し、少量の塩化カルシウム水溶液を加え攪拌した後、メタノール不溶の成分として結晶化した析出物であるフリーポリマーを回収した。得られたフリーポリマーを濾過することで取り出し、その約20mgをテトラハイドロフラン10mlに溶解したフリーポリマーのテトラハイドロフラン溶液を、HLC-8220GPC(東ソー(株)製)を用いて析出物(メチルエチルケトンに可溶かつメタノールに不溶な成分)の重量平均分子量を測定した。カラムはポリスチレンゲルカラムTSKgel SuperHZM-H(東ソー(株)製)を用い、テトラハイドロフランを溶出液とし、ポリスチレン換算で解析した。
(コアシェル重合体組成物A-2の作製)
PPG#700DA26.6gの代わりに、プロピレングリコール鎖の繰返し単位数の平均が12(繰り返し部分の分子量が約700)であるポリプロピレングリコールジメタクリレート(以下、PPG#700DMAとする)27.5gを使用した以外は、実施例1と同様の方法にて、コアシェル重合体組成物A-2を作製した。なお、コアとなるアクリレート系重合体の体積平均粒子径は、0.20μmであり、アクリレート系重合体を形成する単量体成分の重合転化率は99.6%であった。上記により、コア成分75重量%、シェル成分25重量%からなるコアシェル重合体組成物A-2のラテックスを得た。なお、重合完結後の総単量体成分の重合転化率は99.9%であった。
コアシェル重合体組成物A-2のラテックスを使用した以外は、実施例1と同様の方法にて、白色樹脂粉末のコアシェル重合体組成物A-2としてB-2を得た。
5.0重量部のコアシェル重合体組成物A-2の白色樹脂粉末B-2を使用した以外は、実施例1と同様の方法にて、熱可塑性樹脂組成物C-2を得た。
得られた熱可塑性樹脂組成物C-2を用い、実施例1と同様の方法にて窓枠成形体を調製し、また実施例1と同様の方法にて表面光沢、ガードナー強度、及びアイゾット強度の評価を行なった。
上記の熱可塑性樹脂組成物C-2を用い、実施例1と同様の方法にて、メチルエチルケトンに可溶かつメタノールに不溶な成分の重量平均分子量を測定した。
(コアシェル重合体組成物A-3の作製)
PPG#700DA26.6gの代わりに、アリルメタクリレート(以下、AMAとする)4.0gを使用した以外は、実施例1と同様の方法にて、コアシェル重合体組成物A-3を作製した。なお、コアとなるアクリレート系重合体の体積平均粒子径は、0.20μmであり、アクリレート系重合体を形成する単量体成分の重合転化率は99.8%であった。上記により、コア成分75重量%、シェル成分25重量%からなるコアシェル重合体組成物A-3のラテックスを得た。なお、重合完結後の総単量体成分の重合転化率は99.7%であった。
コアシェル重合体組成物A-3のラテックスを使用した以外は、実施例1と同様の方法にて、白色樹脂粉末のコアシェル重合体組成物A-3としてB-3を得た。
5.0重量部のコアシェル重合体組成物A-3の白色樹脂粉末B-3を使用した以外は、実施例1と同様の方法にて、熱可塑性樹脂組成物C-3を得た。
得られた熱可塑性樹脂組成物C-3を用い、実施例1と同様の方法にて窓枠成形体を調製し、また実施例1と同様の方法にて表面光沢、ガードナー強度、及びアイゾッド強度の評価を行なった。
上記の熱可塑性樹脂組成物C-3を用い、実施例1と同様の方法にて、メチルエチルケトンに可溶かつメタノールに不溶な成分の重量平均分子量を測定した。
(コアシェル重合体組成物A-A3~A-A6の作製)
PPG#700DA26.6gの代わりに、プロピレングリコール鎖の繰返し単位数の平均が2、3、7、12のポリプロピレングリコールジアクリレートであり、前記繰り返し部分の分子量が各々約100、200、400、700である、いずれも新中村化学工業製の、APG-100を7.8g、APG-200を9.8g、APG-400を17.2g、APG-700を26.6g、を使用した以外は、実施例1と同様の方法にて、各々実施例3、4、5、6として、コアシェル重合体組成物A-A3、A-A4、A-A5、A-A6を作製した。
コアシェル重合体組成物A-A3~A-A6のラテックスを使用した以外は、実施例1と同様の方法にて、白色樹脂粉末のコアシェル重合体組成物A-A3~A-A6としてB-A3~B-A6を得た。
白色樹脂粉末B-1の代わりに、白色樹脂粉末B-A3~B-A6を用いた以外は、実施例1と同様の方法にて熱可塑性樹脂組成物C-A3~C-A6を得た。
熱可塑性樹脂組成物C-1の代わりに、熱可塑性樹脂組成物C-A3~C-A6を用いたこと以外は、実施例1と同様の方法にて窓枠成形体を調製し、また実施例1と同様の方法にて表面光沢、ガードナー強度、及びアイゾット強度の評価を行なった。
上記コアシェル重合体組成物B-A3~B-A6を用い、実施例1と同様の方法にて、メチルエチルケトンに可溶かつメタノールに不溶な成分の重量平均分子量を測定した。
Claims (7)
- 熱可塑性樹脂(a)100重量部、及びコアシェル重合体組成物(b)0.5~30重量部を含む熱可塑性樹脂組成物であって、
該コアシェル重合体組成物(b)が、コア構成成分を重合して得られるコアの存在下に、シェル構成成分を重合して得られ、
該コア構成成分が、炭素数が2~18のアルキル基を有するアルキルアクリレート70~99.95重量%、多官能性単量体0.05~10重量%、及びこれらと共重合可能な単量体0~20重量%からなる単量体混合物、合計100重量%からなり、かつ、
該多官能性単量体が、ポリプロピレングリコールジアクリレート、及びポリプロピレングリコールジメタクリレートからなる群から選ばれる1以上であり、かつ、
該コアシェル重合体組成物(b)のメチルエチルケトンに可溶かつメタノールに不溶な成分の分子量が、50万以上であることを特徴とする熱可塑性樹脂組成物。 - 前記コアシェル重合体組成物(b)のコア成分に含まれる前記多官能性単量体のプロピレングリコール単位の繰返し単位数の平均が、2以上であることを特徴とする、請求項1記載の熱可塑性樹脂組成物。
- 前記コアシェル重合体組成物(b)のコア成分に含まれる前記多官能性単量体のプロピレングリコール単位の繰返し単位数の平均が、12未満であることを特徴とする、請求項2記載の熱可塑性樹脂組成物。
- 前記コアシェル重合体組成物(b)全体量を100重量%として、前記コア構成成分が50~95重量%、前記シェル構成成分が5~50重量%であることを特徴とする請求項3に記載の熱可塑性樹脂組成物。
- 前記熱可塑性樹脂(a)が塩化ビニル系樹脂である、請求項4に記載の熱可塑性樹脂組成物。
- 請求項5記載の熱可塑性樹脂組成物を成形して得られる成形体。
- 前記成形体が、窓枠またはドアフレームである請求項6記載の成形体。
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- 2008-12-25 JP JP2009548055A patent/JPWO2009084555A1/ja not_active Withdrawn
- 2008-12-25 KR KR1020107016652A patent/KR20100115745A/ko not_active Application Discontinuation
- 2008-12-25 WO PCT/JP2008/073508 patent/WO2009084555A1/ja active Application Filing
- 2008-12-25 US US12/810,919 patent/US8362147B2/en active Active
- 2008-12-25 CN CN2008801228272A patent/CN101910321B/zh not_active Expired - Fee Related
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8362147B2 (en) | 2007-12-28 | 2013-01-29 | Kaneka Corporation | Thermoplastic resin composition and molded body thereof |
WO2010150608A1 (ja) * | 2009-06-25 | 2010-12-29 | 株式会社カネカ | 熱可塑性樹脂組成物、及びその成形体 |
CN102803390A (zh) * | 2009-06-25 | 2012-11-28 | 株式会社钟化 | 热塑性树脂组合物及其成形体 |
US8420736B2 (en) | 2009-06-25 | 2013-04-16 | Kaneka Corporation | Thermoplastic resin composition and molded body thereof |
JP2012144714A (ja) * | 2010-12-21 | 2012-08-02 | Mitsubishi Rayon Co Ltd | アクリル系樹脂組成物、アクリル系樹脂フィルム、積層シート及び積層成形品 |
Also Published As
Publication number | Publication date |
---|---|
EP2226362A4 (en) | 2011-04-13 |
EP2226362B1 (en) | 2012-09-12 |
US20100286337A1 (en) | 2010-11-11 |
CN101910321B (zh) | 2012-08-29 |
US8362147B2 (en) | 2013-01-29 |
EP2226362A1 (en) | 2010-09-08 |
CN101910321A (zh) | 2010-12-08 |
JPWO2009084555A1 (ja) | 2011-05-19 |
KR20100115745A (ko) | 2010-10-28 |
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