CN117757189A - Polypropylene composition and application thereof - Google Patents
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- CN117757189A CN117757189A CN202311702082.XA CN202311702082A CN117757189A CN 117757189 A CN117757189 A CN 117757189A CN 202311702082 A CN202311702082 A CN 202311702082A CN 117757189 A CN117757189 A CN 117757189A
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 58
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 58
- -1 Polypropylene Polymers 0.000 title claims abstract description 51
- 239000000203 mixture Substances 0.000 title claims abstract description 45
- 239000011521 glass Substances 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 26
- 239000011324 bead Substances 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 239000012745 toughening agent Substances 0.000 claims abstract description 6
- 239000004005 microsphere Substances 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000806 elastomer Substances 0.000 claims description 9
- 239000003963 antioxidant agent Substances 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 7
- 239000004611 light stabiliser Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 229920005633 polypropylene homopolymer resin Polymers 0.000 claims description 3
- 229920006249 styrenic copolymer Polymers 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 21
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 238000001746 injection moulding Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 235000012222 talc Nutrition 0.000 description 3
- 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 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BOXSVZNGTQTENJ-UHFFFAOYSA-L zinc dibutyldithiocarbamate Chemical compound [Zn+2].CCCCN(C([S-])=S)CCCC.CCCCN(C([S-])=S)CCCC BOXSVZNGTQTENJ-UHFFFAOYSA-L 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- VNQNXQYZMPJLQX-UHFFFAOYSA-N 1,3,5-tris[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CN2C(N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C(=O)N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C2=O)=O)=C1 VNQNXQYZMPJLQX-UHFFFAOYSA-N 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-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
- 238000005299 abrasion Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application discloses a polypropylene composition and application thereof, and belongs to the technical field of high polymer materials. The polypropylene composition comprises the following components in parts by weight: 46.5 to 60.5 parts of polypropylene resin, 12.7 to 20.3 parts of toughening agent, 14.7 to 30.5 parts of talcum powder and 9.9 to 18.2 parts of hollow glass beads, wherein the compressive strength of the hollow glass beads is more than 11000Psi and the particle size Dn50 is less than 35 mu m, and the polypropylene composition has low density, high tensile strength of welding lines and excellent mechanical property under the combined action of components with specific content, and is suitable for preparing automobile interior and exterior parts and the like.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a polypropylene composition and application thereof.
Background
Polypropylene (PP) has the advantages of low density, easy processing, excellent mechanical properties and the like, and has been widely applied to the fields of automobile industry and the like. For larger parts, multiple gates are often required for injection molding, and when the streams are fed simultaneously, the streams merge between the two gates to form a weld line. The welding line not only affects the appearance, but also has lower strength at the welding line, so that the mechanical property of the part is affected. In addition, weight reduction of automobiles is an important direction of development of the automobile industry. At present, there are studies to improve the weld line appearance and weld line tensile strength by using low isotactic polypropylene with high melt index, but the resulting polypropylene material has low mechanical properties and cannot be reduced in weight. Therefore, there is a need to develop a polypropylene material having a low density, excellent mechanical properties and high weld line tensile strength.
Disclosure of Invention
Based on the defects existing in the prior art, the invention aims to provide a polypropylene composition and application thereof, wherein the polypropylene composition has low density, unobvious weld line, high tensile strength of the weld line and excellent mechanical property, and is suitable for preparing automobile interior and exterior parts and the like.
In order to achieve the above purpose, the invention provides a polypropylene composition, which comprises the following components in parts by weight:
the compressive strength of the hollow glass beads is more than 11000Psi and the particle size Dn50 is less than 35 mu m.
The compressive strength of the hollow glass microspheres was tested by the following test method: the test is carried out by adopting a standard JC/T2285-2014 method for measuring the isostatic resistance strength (barometric method) of hollow glass beads, wherein the test temperature is 23+/-5 ℃, and the same is adopted.
The particle diameter Dn50 of the hollow glass beads refers to the particle diameter corresponding to the cumulative distribution percentage of the number of the hollow glass beads reaching 50 percent. It was measured according to the following test method: the hollow glass beads were dispersed in water and tested using a malvern particle sizer.
The polypropylene composition has unobvious welding lines, higher tensile strength and lower density of the welding lines due to the addition of the specific hollow glass beads, and probably because the hollow glass beads with the specific particle sizes have higher compressive strength, are not easy to shear in the preparation process of the composition, and have spherical shape and no orientation when streams containing the hollow glass beads meet in the injection molding process, so that the formed welding lines are unobvious, and the strength at the welding lines is obviously improved.
The polypropylene composition has low density, high weld line tensile strength and excellent mechanical property under the combined action of the components with specific contents, and is suitable for preparing automobile interior and exterior parts and the like.
When the addition amount of the hollow glass microspheres is less than the above range, the improvement effect on the density of the composition, the appearance of the weld line and the tensile strength of the weld line is not obvious; when the amount of the hollow glass microspheres added exceeds the above range, mechanical properties such as the notched impact strength of the cantilever (type a) of the composition are greatly reduced, and the tensile strength of the weld line is rather reduced, probably because the hollow glass microspheres are more added, resulting in poor compatibility with the matrix resin and unfavorable improvement of the tensile strength of the weld line, so that the content of the hollow glass microspheres is selected to be 9.9-18.2 parts by weight, such as 10 parts by weight, 12 parts by weight, 14 parts by weight, 16 parts by weight, 18 parts by weight, and the like, so that mechanical properties such as lower density, unobvious weld line, higher tensile strength of the weld line, and notched impact strength of the cantilever (type a) can be simultaneously obtained.
When the compressive strength of the hollow glass beads is lower than 11000Psi, the hollow glass beads are easy to shear in the preparation process, so that the mechanical properties such as the notch impact strength (A type) of the cantilever beam of the composition are greatly reduced, and the improvement on the appearance of welding lines and the tensile strength of the welding lines is not obvious, therefore, the compressive strength of the hollow glass beads selected by the application is higher than 11000Psi, such as 11000Psi, 12000Psi, 15000Psi, 20000Psi, 25000Psi, 28000Psi and the like, so that the mechanical properties such as lower density, unobvious welding lines, higher tensile strength of the welding lines, notch impact strength (A type) of the cantilever beam and the like can be simultaneously obtained.
The excessively large particle diameter Dn50 of the hollow glass beads leads to a large interface between the glass beads and PP, and thus the notched Izod impact strength (A-type) and weld line tensile strength are low, so that it is necessary to control the particle diameter Dn50 to 35 μm or less, such as 35 μm, 30 μm, 25 μm, 20 μm, 15 μm, 10 μm, 5 μm, etc.
In some embodiments, the hollow glass microspheres have a compressive strength of 14900 to 25100Psi (e.g., 15000Psi, 18000Psi, 19000Psi, 20000Psi, 21000Psi, 22000Psi, 23000Psi, 24000Psi, 25000Psi, etc.) and a particle size Dn50 of 11.8 to 20.2 μm (12 μm, 15 μm, 17 μm, 19 μm, 20 μm, etc.) to better reduce the density of the composition and improve the weld line appearance and strength thereof.
In some embodiments, the hollow glass microspheres have a true density of 0.4 to 1.6g/cm 3 Such as 0.4g/cm 3 、0.7g/cm 3 、1.0g/cm 3 、1.2g/cm 3 、1.5g/cm 3 Etc. The true density of the hollow glass beads can be obtained by testing the following method: after crushing, the powder coating is prepared according to GBT21782.3-2008 part 3: the density was measured by liquid displacement pycnometer.
In some embodiments, the talc has an average particle size of 1 to 10 μm, such as 1 μm, 2 μm, 5 μm, 7 μm, 10 μm, etc. In one embodiment, the talc has an average particle size of 2.8 to 8.2 μm, such as 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, etc., so that the composition achieves higher weld line tensile strength and mechanical properties such as notched Izod impact strength (type A). The method for testing the average particle size of the talcum powder comprises the following steps: dispersing talcum powder in water, and testing the corresponding particle size when the cumulative distribution percentage of the talcum powder quantity reaches 50% by adopting a Markov particle size analyzer.
In one embodiment, the polypropylene is present in the polypropylene composition in a mass fraction of 43% or more, such as 44%, 45%, 50%, 55%, 60%, etc.
In one embodiment, the polypropylene resin has a melt flow rate of 9.7 to 30.5g/10min under 230 ℃/2.16kg test conditions, so that the composition has higher weld line tensile strength and mechanical properties such as cantilever notched impact strength (type A). Wherein the melt flow rate of the polypropylene resin is measured according to the standard GB/T3682.2-2018 "determination of thermoplastic melt finger mass flow rate and melt volume flow rate".
In one embodiment, the polypropylene resin includes at least one of a homo-polypropylene resin and a co-polypropylene resin.
In one embodiment, the toughening agent includes at least one of an ethylene-butene copolymer elastomer, an ethylene-octene copolymer elastomer, and a styrenic copolymer elastomer.
In one embodiment, the composition further comprises the following components in parts by weight: 0.18 to 2.2 portions of auxiliary agent. Corresponding auxiliary agents such as at least one of antioxidants, light stabilizers, colorants and the like can be added according to actual requirements.
In one embodiment, the auxiliary agent includes at least one of an antioxidant, a light stabilizer, and the like. As an example, antioxidants include hindered phenols and phosphites antioxidants in a mass ratio of 1:1-2:1, hindered phenolic antioxidants include, but are not limited to, at least one of pentaerythritol ester, beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid, and the like; phosphite antioxidants include, but are not limited to, at least one of tris (2, 4-di-tert-butylphenyl) phosphite, cyclic quaternary pentanetetrayl bis (2, 6-di-tert-butyl-4-methylphenyl phosphite), and the like. As one example, the light stabilizer includes, but is not limited to, a hindered amine light stabilizer including, but not limited to, at least one of nickel dibutyl dithiocarbamate, triazine-containing hindered amine polycondensates, and the like.
In one embodiment, the method of preparing the polypropylene composition comprises the steps of: and mixing the raw materials of the components, adding the mixture into a screw extruder, melting, mixing, extruding and granulating to obtain the polypropylene composition. Wherein, the screw extruder can be a double screw extruder, etc.; the temperature of the melt mixing can be selected to be 170-220 ℃; the rotation speed of the screw can be selected to be 350-450 rpm.
The application also provides application of the polypropylene composition in preparing automobile interior and exterior parts, such as door panels, upright posts, auxiliary instrument panels, side skirts, large surrounding and the like.
Compared with the prior art, the beneficial effect of this application lies in:
(1) According to the method, the hollow glass beads with specific compressive strength and average particle size are added into the polypropylene composition, so that the hollow glass beads are not easy to shear in the preparation process, the unoriented characteristic of the hollow glass beads can be fully exerted when streams containing the hollow glass beads meet in the injection molding process, the formed welding lines are not obvious, and the strength of the welding line is remarkably high.
(2) The polypropylene composition has low density, high tensile strength of welding lines and excellent mechanical properties under the combined action of the components with specific contents, and is suitable for preparing automobile interior and exterior parts, such as door plates, upright posts, auxiliary instrument boards, side skirts, large surrounding areas and the like.
Detailed Description
The present invention will be further described with reference to specific examples and comparative examples for better illustrating the objects, technical solutions and advantages of the present invention, and the object of the present invention is to be understood in detail, not to limit the present invention. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present invention. The experimental reagents and instruments involved in the practice of the present invention are common reagents and instruments unless otherwise specified.
Examples and comparative examples
Each of the examples and comparative examples provides a polypropylene composition having the composition shown in tables 1 to 3, and the preparation method comprises the steps of: and (3) uniformly mixing the components, adding the mixture into a double-screw extruder for melt mixing, extruding and granulating to obtain the polypropylene composition, wherein the temperature of the melt mixing is 210 ℃, and the screw rotating speed is 400 rpm. The preparation methods of each example and comparative example are the same as the process parameters unless otherwise specified.
The information on the components used in the above examples and comparative examples is as follows:
copolymerized polypropylene resin 1: melt flow rate 3g/10min, PP K8003, a name of petrochemical industry;
copolymerized polypropylene resin 2: melt flow rate 10g/10min, PP 179, lanzhou petrochemical;
copolymerized polypropylene resin 3: melt flow rate 17g/10min, pp k9017, taiwan;
copolymerized polypropylene resin 4: melt flow rate 30g/10min, PP E P548R, zhonghai Shell;
copolymerized polypropylene resin 5: melt flow rate 45g/10min,PP 7555KNE2, exxon Mobil;
homo-polypropylene resin: melt flow rate 20g/10min, PP MM20-S, a well-known petrochemical industry;
toughening agent 1: ethylene-butene copolymer elastomer, POE ENGAGE 7467, dow chemical;
toughening agent 2: ethylene-octene copolymer elastomer, POE ENGAGE 8842, dow chemical;
toughening agent 3: styrene copolymer elastomer, SEBS G1657, koteng chemistry;
talcum powder 1: is obtained by grinding and sieving HAR T84 of Yirui stone, and has an average particle size of 1 μm;
talcum powder 2: is obtained by grinding and sieving HAR T84 of Yirui stone, and has an average particle size of 3 μm;
talcum powder 3: is obtained by grinding and sieving HAR T84 of Yirui stone, and has an average particle size of 5 μm;
talcum powder 4: is obtained by grinding and sieving HAR T84 of Yirui stone, and has an average particle size of 8 μm;
talcum powder 5: average particle size 10 μm, HAR T84, beneficial rayleigh;
hollow glass microsphere 1: compressive strength 16000psi, dn50 of 20 μm, HS46, style, zhengzhou;
hollow glass microsphere 2: compressive strength 28000psi, dn50 of 16 μm, HS60, style, zhengzhou;
hollow glass microsphere 3: compressive strength 18000psi, dn50 of 12 μm, HM20, style, zhengzhou;
hollow glass microsphere 4: compressive strength 30000psi, dn50 of 10 μm, HS70, style, zhengzhou;
hollow glass microsphere 5: compressive strength 18000psi, dn50 of 35 μm, HL60S, santa Clay;
hollow glass microsphere 6: compressive strength 12000psi, dn50 20 μm, HM30, style, zhengzhou;
hollow glass microsphere 7: compressive strength 8000psi, dn50 25 μm, HS42, style, zhengzhou;
hollow glass microsphere 8: compressive strength 12000psi, dn50 40 μm, HL60, santa Clay;
an antioxidant: antioxidant 1010 and antioxidant 168 in the mass ratio of 1:1, a step of;
light stabilizers: nickel dibutyl dithiocarbamate.
The melt flow rate of the above-mentioned copolymerized polypropylene resin 1-5 and the homopolymerized polypropylene resin is measured according to the standard GB/T3682.2-2018 "determination of thermoplastic melt mass flow rate and melt volume flow rate", and the determination condition is 230 ℃/2.16kg.
The component materials used in each of the examples and comparative examples herein were commercially available materials unless otherwise specified, and the component materials used in each of the parallel experiments were the same.
The polypropylene compositions obtained in each of the examples and comparative examples were injection molded into standard bars for testing, and the following tests were conducted:
(1) Notched Izod impact Strength: according to ISO 180-2000 "determination of impact Strength of plastics", A-type notch, 23 ℃, one end is glued during injection molding, and the obtained sample bar has no welding line;
(2) Weld line tensile strength: according to ISO 527-2012 test of plastic tensile property measurement, the tensile rate is 50mm/min at 23 ℃, two ends are glued during injection molding, a welding line is formed in the middle of a spline, and the spline is a 1A spline;
(3) Density: according to ISO 1183-2019 'determination of Plastic Density', the density of the material is tested, 23 ℃, two ends are glued during injection molding, and a welding line is formed in the middle of a spline.
The test results are shown in Table 4.
TABLE 1
TABLE 2
TABLE 3 Table 3
TABLE 4 Table 4
As is clear from Table 4, the polypropylene composition obtained in each example of the present application had a density of 1.045g/cm 3 The notched Izod impact strength (type A) was 20KJ/m 2 The tensile strength of the welding line is above 12MPa, and the welding line is suitable for preparing automobile interior and exterior parts, such as door plates, upright posts, auxiliary instrument boards, side skirts, large surrounding and the like.
As is clear from the comparison of examples 3 to 6 with comparative example 1, the addition of hollow glass beads can reduce the density and increase the tensile strength of the weld line.
As is clear from the comparison between examples 3 to 6 and comparative example 2, the amount of the hollow glass beads used was low, and the effect of improving the density and the tensile strength of the weld line was not obvious.
As is clear from comparison of examples 3 to 6 with comparative example 3, when the amount of the hollow glass microspheres used was too high, not only the mechanical properties such as the notched Izod impact strength (A-type) were greatly reduced, but also the effect of improving the tensile strength of the weld line was not significant.
As is clear from comparison of examples 3, 7 to 10 and comparative examples 4 to 5, the lower compressive strength of the hollow glass microspheres can lead to the substantial decrease of the notched impact strength (A type) of the cantilever beam, and the improvement effect on the tensile strength of the welding line is not obvious; a higher particle size Dn50 of the hollow glass microspheres results in a lower notched Izod impact strength (type a) and weld line tensile strength of the composition. When the compressive strength of the hollow glass beads is 15000-25000 Psi and the particle size Dn50 is 12-20 mu m, the obtained composition not only has higher notched impact strength (A type) of the cantilever beam, but also has small abrasion to machines, lower density and higher tensile strength of welding lines.
As is evident from comparison of examples 4 with examples 12 to 15, the resulting composition has higher notched Izod impact strength (type A) and weld line tensile strength when the average particle size of talc is in the range of 2.8 to 8.2. Mu.m.
Example 4 is compared with examples 16 to 19, and it is found that the notched Izod impact strength (type A) and weld line tensile strength of the resulting composition are higher when the melt flow rate of polypropylene is in the range of 9.7 to 30.5g/10min (test conditions 230 ℃ C./2.16 kg).
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (9)
1. The polypropylene composition is characterized by comprising the following components in parts by weight:
the compressive strength of the hollow glass beads is more than 11000Psi and the particle size Dn50 is less than 35 mu m.
2. The polypropylene composition according to claim 1, wherein the hollow glass microspheres have a compressive strength of 14900 to 28100Psi and a particle size Dn50 of 11.8 to 20.2 μm.
3. The polypropylene composition according to claim 1, wherein the talc has an average particle size of 1 to 10 μm.
4. The polypropylene composition according to claim 1, wherein the polypropylene resin has a melt flow rate of 9.7 to 30.5g/10min at 230 ℃/2.16kg test conditions.
5. The polypropylene composition of claim 1, wherein the polypropylene resin comprises at least one of a homo-polypropylene resin and a co-polypropylene resin.
6. The polypropylene composition of claim 1, wherein the toughening agent comprises at least one of an ethylene-butene copolymer elastomer, an ethylene-octene copolymer elastomer, and a styrenic copolymer elastomer.
7. The polypropylene composition according to claim 1, further comprising the following components in parts by weight: 0.18 to 2.2 portions of auxiliary agent.
8. The polypropylene composition of claim 7, wherein the auxiliary comprises at least one of an antioxidant and a light stabilizer.
9. Use of the polypropylene composition according to any one of claims 1 to 8 for the preparation of automotive interior and exterior parts.
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| CN202311702082.XA CN117757189A (en) | 2023-12-12 | 2023-12-12 | Polypropylene composition and application thereof |
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| CN202311702082.XA CN117757189A (en) | 2023-12-12 | 2023-12-12 | Polypropylene composition and application thereof |
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