Heat-resistant thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and heat-resistant technology, which is applied in the field of heat-resistant thermoplastic elastomer and its preparation, and can solve problems such as difficulty in meeting usage requirements.

Inactive Publication Date: 2016-06-22
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some special application conditions, such as automotive radiator pipes, engine compartments and other environments that require high temperature resistance, ordinary thermoplastic elastomers are difficult to meet the requirements

Method used

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  • Heat-resistant thermoplastic elastomer and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 of the present invention: preparation of heat-resistant thermoplastic elastomer, calculated in parts by mass, including 300g of EPDM rubber, 700g of polypropylene, 20g of modified filler, 60g of paraffin oil, 48g of vulcanization system and antioxidant 10101g; the modified filler is modified calcium sulfate whisker, the average diameter of the modified calcium sulfate whisker is 1-10 μm, the average length is 20-200 μm, the average aspect ratio is 10-200, CaSO 4 content ≥ 98%; the composition of the vulcanization system includes 10g of stearic acid, 20g of zinc oxide, 9g of dicumyl peroxide and 9g of triallyl isocyanate.

[0016] The preparation method of the heat-resistant thermoplastic elastomer, according to the quality of the above components, the rubber and the paraffin oil are blended, the vulcanizing agent system is added, after the mixing is uniform, it is placed for 30 minutes, and then polypropylene, antioxidant and The modified filler is mixed ev...

Embodiment 2

[0018] Embodiment 2 of the present invention: preparation of heat-resistant thermoplastic elastomer, calculated in parts by mass, including EPDM rubber 400g, polypropylene 600g, modified filler 50g, paraffin oil 80g, vulcanization system 48g and antioxidant 10103g; the modified filler is modified calcium sulfate whisker, the average diameter of the modified calcium sulfate whisker is 1-10 μm, the average length is 20-200 μm, the average aspect ratio is 10-200, CaSO 4 content ≥ 98%; the composition of the vulcanization system includes 10g of stearic acid, 20g of zinc oxide, 9g of dicumyl peroxide and 9g of triallyl isocyanate.

[0019] The preparation method is the same as in Example 1, but the kneading temperature is 160° C., and the kneading time is 20 minutes.

Embodiment 3

[0020] Embodiment 3 of the present invention: preparation of heat-resistant thermoplastic elastomer, calculated in parts by mass, including EPDM rubber 500g, polypropylene 500g, modified filler 80g, paraffin oil 100g, vulcanization system 48g and antioxidant 10106g; the modified filler is modified calcium sulfate whisker, the average diameter of the modified calcium sulfate whisker is 1-10 μm, the average length is 20-200 μm, the average aspect ratio is 10-200, CaSO 4 content ≥ 98%; the composition of the vulcanization system includes 10g of stearic acid, 20g of zinc oxide, 9g of dicumyl peroxide and 9g of triallyl isocyanate.

[0021] The preparation method is the same as in Example 1, but the kneading temperature is 170° C., and the kneading time is 10 minutes.

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Abstract

The invention discloses a heat-resistant thermoplastic elastomer and a preparation method thereof. According to the preparation method, by virtue of a theory that an antioxidant has relatively more lively hydrogen atoms molecules of EPDM and PP, the hydrogen atoms of the antioxidant can easily react with peroxy radicals generated by a blend molecular chain under heat and oxygen in a thermo-oxidative aging process of an EPDM/PP blend, the chain reaction of free radicals is inhibited, and the cleavage and the oxidative cleavage of the molecular chain are prevented, so that the heat resistance of EPDM/PP TPV is improved, and the aging resistance of EPDM/PP TPV is improved. Calcium sulfate whiskers modified by virtue of a silane coupling agent KH-550 form a 'hard core-soft shell' coating structure with EPDM in the blending process of EPDM/PP, and the disperse state of calcium sulfate has a certain blocking effect to gas during thermo-oxidative aging and impedes the conduction of gas and heat, so that the heat resistance stability of EPDM/PP TPV is improved, and the heat aging resistance of EPDM/PP TPV is meliorated.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a heat-resistant thermoplastic elastomer and a preparation method thereof. Background technique [0002] Dynamic vulcanization thermoplastic elastomer (English name Thermoplastic Vulcanizate), also known as thermoplastic vulcanizate, referred to as TPV. It is a thermoplastic elastomer in which rubber is sheared into "tiny" particles and dispersed in a polypropylene matrix during the vulcanization and crosslinking process. It has both the high elasticity of traditional rubber and the thermoplastic processing performance of polypropylene resin. It is a rapidly developing A new type of environmentally friendly material, which has excellent weather resistance, ozone resistance, fatigue resistance, excellent colorability, non-toxic environmental protection, recyclable and other characteristics, is widely used in the automotive industry and construction and other fields. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08L91/06C08K13/06C08K9/06C08K7/08C08K5/09C08K3/22C08K5/14C08K5/3492C08K5/134
CPCC08L23/12C08K2201/003C08K2201/004C08K2201/016C08L23/16C08L2201/08C08L2205/02C08L2205/025C08L2205/03C08L91/06C08K13/06C08K9/06C08K7/08C08K5/09C08K2003/2296C08K5/14C08K5/34924C08K5/1345
Inventor 石敏朱建华蒋团辉
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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