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Polypropylene composite capable of resisting thermal oxidizing aging

A technology of polypropylene and composites, which is applied in the field of heat-resistant oxygen-aging polypropylene composites. It can solve the problems of poor coordination of additives and performance degradation, and achieve improved thermal-oxidative aging performance, increased crystallinity, and good heat resistance. Effect of Oxygen Aging Properties

Inactive Publication Date: 2012-04-11
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of the above patents are that the short-term mechanical properties are good and the heat distortion temperature is high, but the problems they all have are that the coordination of various additives is not good, and the performance drops rapidly after a period of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of heat-resistant oxygen aging polypropylene compound, the ratio by weight percentage is as follows:

[0035] 76.8% polypropylene resin; 4% compatibilizer; 15% talcum powder; 0.2% sorbitol nucleating agent; 3% antioxidant synergist; 0.6% antioxidant; 0.4% processing aid.

[0036] Described polypropylene is the mixture of homopolypropylene and block copolymerization polypropylene, and wherein homopolypropylene is that melt index is 3g / 10min, accounts for 85% of mixture weight; Block copolymerization polypropylene is that melt index is 12g / 10min, accounting for 15% of the weight of the mixture.

[0037] The antioxidant synergist is polytetrafluoroethylene.

[0038] Described antioxidant is the mixture of hindered phenolic primary antioxidant and phosphite antioxidant, and wherein hindered phenolic primary antioxidant is IRGANOX 1010, accounts for 40% of mixture weight; Phosphite secondary antioxidant IRGAFOS P-EPQ, 60% by weight of the mixture.

[0039] The prep...

Embodiment 2

[0041] A kind of heat-resistant oxygen aging polypropylene compound, the ratio by weight percentage is as follows:

[0042] 65.4% polypropylene resin; 5% compatibilizer; 20% calcium carbonate; 0.3% sorbitol nucleating agent; 8% antioxidant synergist; 0.9% antioxidant; 0.4% processing aid.

[0043] Described polypropylene is the mixture of homopolypropylene and block copolymerization polypropylene, and wherein homopolypropylene is that melt index is 12g / 10min, accounts for 80% of mixture weight; Block copolymerization polypropylene is that melt index is 25g / 10min, accounting for 20% of the weight of the mixture.

[0044] The antioxidant synergist is polyvinylidene fluoride.

[0045] The antioxidant is a mixture of hindered phenolic primary antioxidants and thioether secondary antioxidants, wherein the hindered phenolic primary antioxidant is IRGANOX 1010, accounting for 35% of the weight of the mixture; thioether secondary antioxidants The agent is NAUGARD 412S, accounting fo...

Embodiment 3

[0048] A kind of heat-resistant oxygen aging polypropylene compound, proportioning by weight percentage is as follows:

[0049] 51.2% polypropylene resin; 6% compatibilizer; 35% barium sulfate; 0.3% phosphate nucleating agent; 6% antioxidant synergist; 0.9% antioxidant; 0.6% processing aid.

[0050] The polypropylene is a mixture of homopolypropylene and block copolymerized polypropylene, wherein the homopolymerized polypropylene is a high crystalline polypropylene with a melt index of 20g / 10min, accounting for 80% of the weight of the mixture; block copolymerized polypropylene The melt index is 12g / 10min, accounting for 20% of the weight of the mixture.

[0051] The antioxidant synergist is polypropylene-based silicone masterbatch, which contains 50% polysiloxane.

[0052] The antioxidant is a mixture of hindered phenolic primary antioxidant and phosphite secondary antioxidant, wherein the hindered phenolic primary antioxidant is IRGANOX 3114, accounting for 40% of the weight ...

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PUM

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Abstract

The invention discloses a polypropylene composite capable of resisting thermal oxidizing aging, comprising the following components based on weight percentages: 40-82% of polypropylene resin, 2-10% of compatilizer, 10-40% of filler, 0.2-0.5% of nucleating agent, 2-10% of anti-oxidant synergistic agent, 0.2-1.0% of anti-oxidant and 0.2-1.0% of processing agent, wherein the polypropylene resin is a mixture of homopolymerized polypropylene and block copolymerization polypropylene; the compatilizer is graft polymer of polypropylene and unsaturated carboxylic acid or its anhydride. The advantages are as follows: the nucleating agent is a substance which makes the sphaerocrystal of the polypropylene more refine, the crystallization more homogenized and regularized, and increases the crystallinity; the anti-oxidant synergistic agent is one of or a mixture of fluoropolymer and polysiloxane. The composite has both mechanics performance and performance of resisting thermal oxidizing aging. In addition, the anti-oxidant synergistic agent has a very low surface tension and has a trend of migrating and assigning to the surface of the composite during the forming and use process. The configuration of the anti-oxidant synergistic agent has an effect of separating oxygen molecules, and can lower the ratio of the oxygen entering the base body through the surface of the composite such that the performance of resisting thermal oxidizing aging for the polypropylene is increased.

Description

technical field [0001] The invention relates to a heat-oxidative aging-resistant polypropylene compound, which belongs to the technical field of polypropylene modification. Background technique [0002] Polypropylene has the advantages of abundant sources and low price, and compared with other general-purpose plastics, it has the characteristics of good mechanical properties, low density, good rigidity, high strength and good electrical insulation performance. It is currently widely used in the field of household appliances, but due to Polypropylene contains unstable tertiary carbon groups, and Yiai is attacked by heat and oxygen and its performance deteriorates, such as yellowing, surface cracking and pulverization, and a significant decline in mechanical properties. Therefore, many products are harmful to polypropylene. Propylene proposes long-term heat-oxidative aging resistance requirements. The existing improvement methods are generally to improve the heat and oxygen a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/00C08L51/06C08K13/06C08K3/34C08K3/26C08K3/30C08K5/524C08K7/20
Inventor 王爱东杨霄云于海鸥陶四平肖鹏李其龙宁凯军刘奇祥
Owner KINGFA SCI & TECH CO LTD
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