CN115926308B - Polypropylene composite material easy to spray and preparation method thereof - Google Patents
Polypropylene composite material easy to spray and preparation method thereof Download PDFInfo
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- -1 Polypropylene Polymers 0.000 title claims abstract description 53
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 51
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 239000007921 spray Substances 0.000 title claims description 16
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000012745 toughening agent Substances 0.000 claims abstract description 20
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 17
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 17
- 229920001577 copolymer Polymers 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000011256 inorganic filler Substances 0.000 claims abstract description 4
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 16
- 230000003078 antioxidant effect Effects 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 16
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical group O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 15
- 239000000314 lubricant Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 8
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 5
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 3
- 239000008116 calcium stearate Substances 0.000 claims description 3
- 235000013539 calcium stearate Nutrition 0.000 claims description 3
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical group CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 3
- JKBYAWVSVVSRIX-UHFFFAOYSA-N octadecyl 2-(1-octadecoxy-1-oxopropan-2-yl)sulfanylpropanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)SC(C)C(=O)OCCCCCCCCCCCCCCCCCC JKBYAWVSVVSRIX-UHFFFAOYSA-N 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 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 claims 1
- 239000003973 paint Substances 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 4
- 238000004220 aggregation Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 238000011049 filling Methods 0.000 abstract description 2
- 230000005012 migration Effects 0.000 abstract description 2
- 238000013508 migration Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 9
- 238000011282 treatment Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 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
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an easy-spraying polypropylene composite material and a preparation method thereof, wherein the easy-spraying polypropylene composite material is prepared from the following raw materials in parts by weight: 60-80 parts of copolymerized polypropylene, 5-10 parts of ethylene-vinyl acetate copolymer, 0.5-1 part of bisaminosilane oligomer, 10-20 parts of inorganic filler and 6-11 parts of other auxiliary agents. The added bisaminosilane oligomer has the characteristics of high polarity and easy migration, can effectively improve the surface polarity of the material and the paint adhesion strength, is also used as an effective powder dispersing agent, prevents aggregation of filling powder, and further improves the mechanical property of the material; the ethylene-vinyl acetate copolymer added by the invention can be effectively compatible with the copolymer and the toughening agent, has small influence on the overall mechanical property of the material, and does not influence the application range of the material.
Description
Technical Field
The invention relates to the technical field of modified materials, in particular to an easy-to-spray polypropylene composite material and a preparation method thereof.
Background
The polypropylene has good mechanical properties, and can be directly manufactured or modified to manufacture parts of various mechanical equipment, such as industrial pipelines, agricultural water pipes, motor fans, foundation templates and the like. The modified polypropylene can be molded into bumpers, rubbing strips, automobile steering wheels, instrument panels and interior trim parts, and can be used for manufacturing insulating shells of household appliances and inner containers of washing machines, and is widely used as insulating materials of wires, cables and other appliances.
The appearance and decoration requirements of polypropylene materials are continuously improved while polypropylene is widely used. However, polypropylene is a nonpolar crystalline material, and has extremely low surface energy, poor surface wettability and excessively different polarity from the coating component, so that the polypropylene material product is difficult to carry out surface coating operation. Additional treatments of the polypropylene surface are therefore required to increase the polarity of the surface of the article. Common treatment processes include: flame treatment, chemical oxidation treatment, corona discharge treatment, plasma treatment, surface coating treatment, and the like. The method has high cost, and the stability and operability cannot be ensured at the same time.
Disclosure of Invention
The invention aims to provide an easy-to-spray polypropylene composite material and a preparation method thereof, which are used for solving the problems in the prior art, and improving the surface polarity of the material by adding a high-polarity easy-to-migrate bisaminosilane oligomer on the premise of ensuring the stability of the material, so that the surface spray adhesion strength of the material is improved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The invention discloses an easy-spraying polypropylene composite material, which is prepared from the following raw materials in parts by weight:
as a further scheme of the invention: the melt flow rate of the copolymer polypropylene is 25-35g/10min under the condition of 230 ℃/2.16kg, and the notch impact strength is more than or equal to 8KJ/m 2.
As a further scheme of the invention: the mass concentration of the vinyl acetate in the ethylene-vinyl acetate copolymer is 25-45%. Vinyl acetate is an important component for improving the surface polarity of the copolymer, and the polarity of the vinyl acetate is higher, and if the content is too low, the use effect cannot be achieved, and if the content is too high, the overall rigidity and heat resistance of the composite material can be affected.
As a further scheme of the invention: the water content of the bisaminosilane oligomer is less than or equal to 1 percent, the content of organic silicon in the bisaminosilane oligomer is more than or equal to 85 percent, and the organic silicon is an effective component in the bisaminosilane oligomer, plays a role of amphiphilicity, improves the surface polarity and improves the binding force of a paint surface.
As a further scheme of the invention: the inorganic filler is talcum powder, and the particle size of the talcum powder is 4-8 mu m.
As a further scheme of the invention: the other auxiliary agents comprise a toughening agent, an antioxidant and a lubricant.
As a further scheme of the invention: the toughening agent is an ethylene-octene copolymer, the melt flow rate of the toughening agent is 4-6g/10min under the condition of 190 ℃/2.16kg, and the density is less than or equal to 0.88g/cm 3.
As a further scheme of the invention: the antioxidant is at least three of pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], n-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tri- (2, 4-di-tert-butylphenyl) phosphite and dioctadecyl thiodipropionate.
As a further scheme of the invention: the lubricant is ethylene bis stearamide, white oil and calcium stearate according to the mass ratio of 2:2:1, and mixing.
The invention discloses a preparation method of the easy-spraying polypropylene composite material, which comprises the following steps:
s1: weighing the copolymer polypropylene, the ethylene-vinyl acetate copolymer, the bisaminosilane oligomer, the talcum powder, the toughening agent, the antioxidant and the lubricant according to parts by weight, and adding the copolymer polypropylene, the ethylene-vinyl acetate copolymer, the bisaminosilane oligomer, the talcum powder, the toughening agent, the antioxidant and the lubricant into a high-speed mixer to be fully mixed for 5-15min to obtain a mixed material;
s2: adding the mixed material obtained in the step S1 into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easily-sprayed polypropylene composite material granules;
Wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 175-185 ℃, 180-190 ℃, 190-200 ℃, 200-210 ℃ and 220-230 ℃ respectively.
Compared with the prior art, the invention has the beneficial effects that: the added bisaminosilane oligomer has the characteristics of high polarity and easy migration, can effectively improve the surface polarity of the material and the paint adhesion strength, is also used as an effective powder dispersing agent, prevents aggregation of filling powder, and further improves the mechanical property of the material; the vinyl acetate component in the ethylene-vinyl acetate added by the invention has stronger polarity, so that the polarity of the surface of the material can be obviously improved, the binding force between the surface of the material and a paint film can be improved, and the spraying performance of the material can be improved. In addition, the copolymer can be effectively compatible with the copolymer and the toughening agent, has small influence on the overall mechanical property of the material, and does not influence the application range of the material.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Specific information of the raw materials used in the following examples and comparative examples are as follows:
Copolymerized polypropylene, brand PP-K7227H, purchased from chinese korea petrochemicals;
ethylene-vinyl acetate copolymer having a vinyl acetate content of 25-45, trade mark 210W, available from dupont, usa;
The water content of the bisaminosilane oligomer is less than or equal to 1%, the organic silicon content is more than or equal to 85%, and the brand SIC6652 is purchased from Guangzhou silicon-carbon new materials;
The inorganic filler is talcum powder with the average grain diameter of 4-8 mu m and the trade mark AH51210L, which is purchased from Liaoning Ai Hai;
The toughening agent is an ethylene-octene copolymer, the melt flow rate of the toughening agent is 4-6g/10min under the condition of 190 ℃/2.16kg, the density is less than or equal to 0.88g/cm 3, and the toughening agent is brand 8200 and is purchased from the Dow chemical;
An antioxidant which is formed by mixing at least three of pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate (namely an antioxidant 1010), n-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate (namely an antioxidant 1076), tri- (2, 4-di-tert-butylphenyl) phosphite (namely an antioxidant 168) and dioctadecyl thiodipropionate (namely an antioxidant DSTDP) and is purchased from basf;
The lubricant is a mixture of ethylene bis stearamide, white oil and calcium stearate with the mass ratio of 2:2:1, and is a commercial product.
In addition, "parts" described in examples and comparative examples refer to parts by weight unless otherwise specified.
Example 1
60 Parts of copolymerized polypropylene, 10 parts of ethylene-vinyl acetate copolymer, 10 parts of toughening agent, 0.5 part of bisaminosilane oligomer, 20 parts of talcum powder, 0.5 part of antioxidant and 0.5 part of lubricant are added into a high-speed mixer to be mixed for 5-15min; then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easily-sprayed polypropylene composite material granules 1; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 175 ℃, 180 ℃, 190 ℃, 200 ℃ and 220 ℃ respectively.
Example 2
70 Parts of copolymerized polypropylene, 8 parts of ethylene-vinyl acetate copolymer, 7 parts of toughening agent, 0.7 part of bisaminosilane oligomer, 15 parts of talcum powder, 0.5 part of antioxidant and 0.5 part of lubricant are added into a high-speed mixer to be mixed for 5-15min; then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easy-to-spray polypropylene composite material granules 2; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder was 180 ℃, 185 ℃, 195 ℃, 205 ℃ and 225 ℃.
Example 3
80 Parts of copolymerized polypropylene, 5 parts of ethylene-vinyl acetate copolymer, 5 parts of toughening agent, 1.0 part of bisaminosilane oligomer, 10 parts of talcum powder, 0.5 part of antioxidant and 0.5 part of lubricant are added into a high-speed mixer to be mixed for 5-15min; then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easily-sprayed polypropylene composite material granules 3; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder was 185 ℃, 190 ℃, 200 ℃, 210 ℃, 230 ℃, respectively.
Comparative example 1
70 Parts of copolymerized polypropylene, 7 parts of toughening agent, 0.7 part of bisaminosilane oligomer, 15 parts of talcum powder, 0.5 part of antioxidant and 0.5 part of lubricant are added into a high-speed mixer to be mixed for 5-15min; then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easy-to-spray polypropylene composite material granules 4; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder was 180 ℃, 185 ℃, 195 ℃, 205 ℃ and 225 ℃.
Comparative example 2
70 Parts of copolymerized polypropylene, 8 parts of ethylene-vinyl acetate copolymer, 7 parts of toughening agent, 15 parts of talcum powder, 0.5 part of antioxidant and 0.5 part of lubricant are added into a high-speed mixer to be mixed for 5-15min; then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easily-sprayed polypropylene composite material granules 5; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder was 180 ℃, 185 ℃, 195 ℃, 205 ℃ and 225 ℃.
Comparative example 3
70 Parts of copolymerized polypropylene, 8 parts of ethylene-vinyl acetate copolymer, 7 parts of toughening agent, 0.7 part of epoxy silane oligomer, 15 parts of talcum powder, 0.5 part of antioxidant and 0.5 part of lubricant are added into a high-speed mixer to be mixed for 5-15min; then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easily-sprayed polypropylene composite material granules 6; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder was 180 ℃, 185 ℃, 195 ℃, 205 ℃ and 225 ℃.
The obtained easy-to-spray polypropylene composite pellets 1-6 were tested, and the following table 1 is used as test items and standards:
Table 1: test item and standard
| Test item/unit | Test standard |
| Tensile Strength/Mpa | ISO 527 |
| Flexural Strength/Mpa | ISO 178 |
| Flexural modulus/Mpa | ISO 178 |
| Izod notched impact strength/KJ/square meter | ISO 180 |
| Dyne value | Dyne pen test |
| Hundred grid test | GB/T 9286 |
Note that: the conditions tested in table 1 and the dimensions of the test bars are as follows:
tensile strength test: 1A type molding sample strip, the stretching speed is 50mm/min;
Flexural strength and flexural modulus: sample dimensions 100mm x 10mm x 4mm, experimental speed: 2mm/min;
Notched Izod impact strength: the A-type die is provided with a die-forming notch, sample dimensions 100mm x 10mm x 4mm;
The value of dyne: leveling an injection molding sample without surface defects, marking for 30mm, and taking the condition that no dyne liquid shrinkage bead points appear in 3 seconds as the reference;
hundred grid test: the sample is flat and has no surface defect, the size is 150mm and 100mm, and the sample is only cleaned and dried before spraying, so that no other pretreatment procedure exists. The thickness of the paint film is 61-120 mu m, and the paint surface at least comprises a primer and a colored paint.
The test results obtained by testing the easy-to-spray polypropylene composite pellets 1-6 are shown in Table 2:
Table 2: test results
As can be seen from Table 2, the dyne value and the hundred-cell test value of the polypropylene composite materials in examples 1 to 3 are both superior to those of comparative examples 1 to 3, which shows that the binding force between the polypropylene surface and the coating layer can be improved by simultaneously adding ethylene-vinyl acetate and a bisaminosilane oligomer, and a polypropylene composite material more suitable for spraying is obtained. It can be seen from the combination of example 2 and comparative example 1 that the ethylene-vinyl acetate copolymer contributes to the easy spraying performance of the polypropylene composite material, and the bisaminosilane oligomer not only improves the dyne value and the hundred lattice test of the material, but also improves the mechanical property of the material as can be seen from example 2, comparative example 2 and comparative example 3.
Although the present disclosure describes embodiments, not every embodiment is described in terms of a single embodiment, and such description is for clarity only, and one skilled in the art will recognize that the embodiments described in the disclosure as a whole may be combined appropriately to form other embodiments that will be apparent to those skilled in the art.
Therefore, the above description is not intended to limit the scope of the application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (8)
1. The easy-to-spray polypropylene composite material is characterized by being prepared from the following raw materials in parts by weight:
The mass concentration of vinyl acetate in the ethylene-vinyl acetate copolymer is 25-45%;
The water content of the bisaminosilane oligomer is less than or equal to 1 percent, and the organosilicon content of the bisaminosilane oligomer is more than or equal to 85 percent.
2. The easy-to-spray polypropylene composite material according to claim 1, wherein the melt flow rate of the copolymer polypropylene is 25-35g/10min at 230 ℃/2.16kg, and the notched impact strength is not less than 8KJ/m 2.
3. The easy-to-spray polypropylene composite material according to claim 1, wherein the inorganic filler is talc powder, and the particle size of the talc powder is 4-8 μm.
4. The easy-to-spray polypropylene composite material according to claim 1, wherein the other auxiliary agents include a toughening agent, an antioxidant and a lubricant.
5. The easy spray polypropylene composite material according to claim 4, wherein the toughening agent is an ethylene-octene copolymer having a melt flow rate of 4-6g/10min at 190 ℃/2.16kg and a density of less than or equal to 0.88g/cm 3.
6. The easy-to-spray polypropylene composite material according to claim 4, wherein the antioxidant is at least three of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], n-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tris- (2, 4-di-tert-butylphenyl) phosphite and dioctadecyl thiodipropionate.
7. The easy-spraying polypropylene composite material according to claim 4, wherein the lubricant is ethylene bis stearamide, white oil and calcium stearate according to a mass ratio of 2:2:1, and mixing.
8. The method for preparing the easy-to-spray polypropylene composite material according to any one of claims 1 to 7, comprising the following steps:
s1: weighing the copolymer polypropylene, the ethylene-vinyl acetate copolymer, the bisaminosilane oligomer, the talcum powder, the toughening agent, the antioxidant and the lubricant according to parts by weight, and adding the copolymer polypropylene, the ethylene-vinyl acetate copolymer, the bisaminosilane oligomer, the talcum powder, the toughening agent, the antioxidant and the lubricant into a high-speed mixer to be fully mixed for 5-15min to obtain a mixed material;
s2: adding the mixed material obtained in the step S1 into a double-screw extruder, mixing, extruding, cooling and granulating to obtain easily-sprayed polypropylene composite material granules;
Wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 175-185 ℃, 180-190 ℃, 190-200 ℃, 200-210 ℃ and 220-230 ℃ respectively.
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| CN109608756A (en) * | 2018-11-28 | 2019-04-12 | 广东威林工程塑料股份有限公司 | A kind of PP composite material and preparation method thereof with high paint adhesion |
| CN110951163A (en) * | 2018-09-26 | 2020-04-03 | 合肥杰事杰新材料股份有限公司 | High-surface-tension low-density polypropylene composite material and preparation method thereof |
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| CN110951163A (en) * | 2018-09-26 | 2020-04-03 | 合肥杰事杰新材料股份有限公司 | High-surface-tension low-density polypropylene composite material and preparation method thereof |
| CN109608756A (en) * | 2018-11-28 | 2019-04-12 | 广东威林工程塑料股份有限公司 | A kind of PP composite material and preparation method thereof with high paint adhesion |
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