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Long-term heat and oxidation aging resistant polypropylene compound and preparation method thereof

A technology for polypropylene and composites, which is applied in the field of long-term heat-resistant oxygen-aging polypropylene composites and its preparation, and can solve problems such as poor thermal-oxidative aging performance, poor coordination of additives, and performance decline.

Active Publication Date: 2014-11-05
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The advantages of the above-mentioned patents are that they have good short-term mechanical properties and high heat distortion temperature, but they all have the problem that the coordination of various additives is not good, and the performance declines rapidly after a period of use, while the long-term thermal oxygen aging performance not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A long-term heat-resistant oxygen aging polypropylene composite, comprising the following components in weight percent:

[0032] 83% polypropylene resin; 5% pentaerythritol triacrylate; 10% talc; 1% calcium pimelate; 0.6% antioxidant; 0.4% processing aid.

[0033] 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, and block copolymerization polypropylene is that melt index is 12g / 10min, accounting for 15% of the weight of the mixture.

[0034] Described antioxidant is the mixture of hindered phenolic primary antioxidant and phosphite antioxidant, 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.

[0035] Its preparation process is as follows:

[0036] After mixing the above ingredients evenly, put...

Embodiment 2

[0038] A long-term heat-resistant oxygen aging polypropylene composite, comprising the following components in weight percent:

[0039] 57.5% polypropylene resin; 0.5% pentaerythritol triacrylate; 40% talc; 1% calcium pimelate; 0.6% antioxidant; 0.4% processing aid.

[0040] 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, and block copolymerization polypropylene is that melt index is 25g / 10min, accounting for 20% of the weight of the mixture.

[0041] 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, and thioether secondary antioxidants The agent is NAUGARD 412S, accounting for 65% by weight of the mixture.

[0042] Its preparation process is the same a...

Embodiment 3

[0044] A long-term heat-resistant oxygen aging polypropylene composite, comprising the following components in weight percent:

[0045] Polypropylene resin 71.2%; Pentaerythritol triacrylate 2.5%; Talc powder 25%; Calcium pimelate 0.1%; Antioxidant 0.6%; Processing aid 0.6%.

[0046] The polypropylene is a mixture of homopolymerized polypropylene 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, and the block copolymerized polypropylene The melt index is 12g / 10min, accounting for 20% of the weight of the mixture.

[0047] 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 of the mixture, phosphite secondary antioxidant The agent is Ultranox 627A, accounting for 60% by weight of...

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PUM

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Abstract

The invention discloses a long-term heat and oxidation aging resistant polypropylene compound prepared in percentage by weight: 52%-89% of polypropylene resin, 10%-40% of inorganic filler, 0.1%-1% of beta nucleating agent, 0.5%-5% of stem grafting assistant, 0.2%-1% of antioxygen and 0.2%-1% of processing agent. A preparation method comprises the following steps of: evenly mixing each component, putting in a twin screw extruder for extrusion, enabling a temperature of the extruder to be 190-210 DEG C, enabling a rotating speed to be 50-400 circle / minute, cooling extrusion objects by using water, conducting sized dicing and obtaining the compound. The compound prepared by the preparation method has an excellent comprehensive mechanical property, has long-term heat and oxidation aging resistant characteristics, cannot pulverize after baking for 3000 hours in a 150-DEG C forced convection oven, and is widely applied to heat and oxidation aging resistant components of household appliances.

Description

technical field [0001] The invention belongs to the field of processing and modification of polymer materials, and in particular relates to a long-term heat-resistant oxygen aging polypropylene compound and a preparation method thereof. Background technique [0002] Polypropylene is one of the five general-purpose plastics and has been widely used in chemical industry, construction, light industry, automobile, home appliance, packaging and other industrial sectors. Compared with other general-purpose plastics, polypropylene has the advantages of good mechanical properties, low density, good rigidity, high strength and good electrical insulation performance. However, because PP contains unstable tertiary carbon groups, it is easily attacked by heat and oxygen. However, deterioration of performance occurs, such as yellowing, surface cracking and pulverization, and a significant decline in mechanical properties. Therefore, many products put forward long-term heat and oxygen ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L53/00C08K13/02C08K5/103C08K5/12C08K5/098B29B9/06B29C47/92B29C48/92
CPCB29C47/92B29C48/04B29C48/40B29C48/911B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 于海鸥王爱东杨霄云宁凯军肖鹏陶四平郑明嘉
Owner KINGFA SCI & TECH CO LTD
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