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Thermo-oxidative-aging-resistant impact-resistant polypropylene composition and preparation method thereof

A technology of polypropylene composition and polypropylene powder, which is applied in the field of polyolefin composition, can solve the problems of poor aging resistance, failure to point out the effect of compounding new catalysts and other additives, etc., and achieve rigidity stability, impact improvement, Effect of improving heat and oxygen aging resistance

Inactive Publication Date: 2020-03-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The amount of antioxidant is more, but the actual aging resistance is not good
[0004] The foreign literature "Antioxidant Performance of a New Sulfur-Containing Resisting Phenolic Compound" expounds the performance advantages of the new antioxidant acrylic thiol and other additives, but does not point out the effect of the combination of the new catalyst and other additives

Method used

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  • Thermo-oxidative-aging-resistant impact-resistant polypropylene composition and preparation method thereof
  • Thermo-oxidative-aging-resistant impact-resistant polypropylene composition and preparation method thereof
  • Thermo-oxidative-aging-resistant impact-resistant polypropylene composition and preparation method thereof

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Embodiment Construction

[0035] The present invention is further described below in conjunction with embodiment.

[0036] The raw material that adopts in the embodiment and comparative example:

[0037] Impact copolymer polypropylene powder resin (melt mass flow rate 20g / 10min, melting temperature 165°C, ethylene content 5.5%);

[0038] Metallocene linear low density polyethylene mLLDPE (melt mass flow rate 3.5g / 10min, density 0.927g / cm 3 );

[0039] Antioxidant A (acrylic acid thiol, number average molecular weight is 1305);

[0040] Antioxidant B (tris(2,4-di-tert-butylphenyl) phosphite);

[0041] The degradation agent DTBP (di-tert-butyl peroxide, the number average molecular weight is 146, the density is 0.796g / cm 3 , boiling point 110°C);

[0042] Antistatic agent (glycerol monostearate);

[0043] Acid absorbing agent (calcium stearate).

[0044] The preparation method adopted in the embodiment is as follows:

[0045] Put the raw materials in a high-speed mixer, stir for 3 minutes at a sp...

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Abstract

The invention relates to a polyolefin composition, particularly to a thermo-oxidative-aging-resistant impact-resistant polypropylene composition and a preparation method thereof. The composition comprises the following raw materials: 88 to 97 parts of a polypropylene powder resin, 3 to 12 parts of metallocene linear low density polyethylene mLLDPE, 0.05 to 0.1 part of an antioxidant A, 0.05 to 0.1part of an antioxidant B, 0.03 to 0.07 part of a degradation agent, 0.02 to 0.08 part of an antistatic agent, and 0.02 to 0.1 part of an acid absorption agent, wherein the sum of the polypropylene powder resin and the metallocene linear low density polyethylene mLLDPE is 100 parts, the antioxidant A is mercaptan acrylate and has the number-average molecular weight of 1305, and the antioxidant B is tri(2,4-di-tert-butylphenyl) phosphite, and has the number-average molecular weight of 647. The preparation method comprises the following steps: uniformly mixing the raw materials, and carrying outtwin-screw extrusion granulation to obtain the polypropylene composition with good heat resistance, good impact resistance and good flowability.

Description

technical field [0001] The invention relates to a polyolefin composition, in particular to a heat-resistant, oxygen-aging, impact-resistant polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a thermoplastic resin with excellent performance. It has the advantages of low density, non-toxicity, easy processing, and good insulation performance. It is widely used in automobiles, household appliances, electronics, packaging, building materials, and furniture. At present, domestic home appliances such as refrigerators and washing machines are developing towards large capacity, and the products are gradually lightweight, personalized, multi-functional and environmentally friendly. However, due to the unstable tertiary carbon atoms in the structure of PP itself, it is particularly sensitive to light, and it is prone to aging when used outdoors, such as yellowing, brittleness, and surface cracks. As a result, the mechanical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/08C08K5/14C08K5/103C08K5/098C08K5/526
CPCC08L23/14C08L2201/08C08L23/0815C08K5/14C08K5/103C08K5/098C08K5/526
Inventor 明月李丽陈智能裴晓静陈华赉黄峰王秀丽
Owner CHINA PETROLEUM & CHEM CORP
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