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TPV (thermoplastic vulcanizate) material for vehicles as well as preparation method and application thereof

A technology for vehicles and raw materials, applied in the field of TPV materials for vehicles and its preparation, can solve problems such as constraints, achieve fast speed, improve mechanical properties at room temperature and high temperature, and reduce degradation

Active Publication Date: 2022-04-12
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TPV materials are superior to EPDM rubber in terms of mechanical properties at room temperature and low temperature, heat aging, and ozone resistance, but are weaker than EPDM rubber in terms of high-temperature mechanical properties and compression permanent deformation (rebound performance).
The lack of these two properties is the key performance that restricts the application of TPV to cooling water pipes

Method used

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  • TPV (thermoplastic vulcanizate) material for vehicles as well as preparation method and application thereof
  • TPV (thermoplastic vulcanizate) material for vehicles as well as preparation method and application thereof
  • TPV (thermoplastic vulcanizate) material for vehicles as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of TPV material for vehicle, its raw material comprises by weight: 100 parts of EPDM rubber, 67 parts of polypropylene, 1.2 parts of nucleating agent, 50 parts of filler, 5 parts of reinforcing agent, 120 parts of filler oil, 2 parts of vulcanizing agent, 0.5 part of vulcanization aid, 0.6 part of antioxidant, 0.6 part of anti-ultraviolet agent, 0.5 part of internal lubricant.

[0038] EPDM is obtained by the copolymerization of ethylene, propylene, ethylidene norbornene ENB and 5-vinyl-2-norbornene VNB. When preparing EPDM rubber, ethylene, propylene, ENB and VNB respectively account for 50% and 50% of the total weight of comonomers. 46.5%, 0.5%, 3%.

[0039] Polypropylene is homopolypropylene with a density of 0.9g / cm 3 , The melt index is 12g / 10min.

[0040] The nucleating agent is 1,3:2,4-bis(3,4-dimethylbenzylidene)-D-sorbitol (commercially available product is referred to as nucleating agent 3988) and N,N-diphenylbutadiene Amides (DPS for short) are comb...

Embodiment 2

[0055] A kind of TPV material for vehicle, its raw material comprises by weight: 100 parts of EPDM rubber, 75 parts of polypropylene, 1.5 parts of nucleating agent, 45 parts of filler, 5 parts of reinforcing agent, 120 parts of filler oil, 2.4 parts of vulcanizing agent, 0.6 part of vulcanization aid, 0.6 part of antioxidant, 0.6 part of anti-ultraviolet agent, 0.5 part of internal lubricant.

[0056] EPDM rubber is obtained by copolymerization of ethylene, propylene, ethylidene norbornene ENB and 5-vinyl-2-norbornene VNB. When preparing EPDM rubber, ethylene, propylene, ENB and VNB respectively account for 62% of the total weight of comonomers , 35.4%, 0.6%, 2%.

[0057] Polypropylene is homopolypropylene with a density of 0.9g / cm 3 , The melt index is 15g / 10min.

[0058] The nucleating agent is a combination of 1,3:2,4-bis(3,4-dimethylbenzylidene)-D-sorbitol and N,N-diphenylsuccinamide at a mass ratio of 5:1.

[0059] The filler is superfine talc powder with a median part...

Embodiment 3

[0063] A kind of TPV material for vehicles, its raw material comprises by weight: 100 parts of EPDM, 75 parts of polypropylene, 1.5 parts of nucleating agent, 40 parts of filler, 10 parts of reinforcing agent, 140 parts of filler oil, 3 parts of vulcanizing agent, vulcanization assistant 0.8 parts of anti-oxidant, 0.8 parts of antioxidant, 0.6 parts of anti-ultraviolet agent, and 0.8 parts of internal lubricant.

[0064] EPDM is obtained by the copolymerization of ethylene, propylene, ethylidene norbornene ENB and 5-vinyl-2-norbornene VNB. When preparing EPDM rubber, ethylene, propylene, ENB and VNB respectively account for 50% and 50% of the total weight of comonomers. 46.5%, 0.5%, 3%.

[0065] Polypropylene is homopolypropylene with a density of 0.9g / cm 3 , The melt index is 10g / 10min.

[0066] The nucleating agent is a combination of 1,3:2,4-bis(3,4-dimethylbenzylidene)-D-sorbitol and N,N-diphenylsuccinamide in a weight ratio of 4:1.

[0067] The filler is superfine talc...

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Abstract

The invention discloses an automotive TPV (thermoplastic vulcanizate) material as well as a preparation method and application thereof, and the automotive TPV material is prepared from the following raw materials in parts by mass: 100 parts of EPDM (ethylene-propylene-diene monomer) rubber, 55 to 75 parts of polypropylene, 0.8 to 1.5 parts of nucleating agent, 40 to 60 parts of filler, 3 to 10 parts of reinforcing agent, 100 to 140 parts of filling oil, 1 to 3 parts of vulcanizing agent, 0.2 to 0.8 part of vulcanizing aid, 0.4 to 0.8 part of antioxidant, 0.4 to 0.8 part of ultraviolet screening agent and 0.4 to 0.8 part of internal lubricant. And the EPDM rubber is formed by copolymerization of ethylene, propylene, ethylidene norbornene and 5-vinyl-2-norbornene. The TPV material provided by the invention has better high-temperature tensile property and rebound resilience than common TPV, and can be applied to cooling water pipe parts of new energy vehicles.

Description

technical field [0001] The invention relates to a rubber material, in particular to a TPV material for vehicles and its preparation method and application. Background technique [0002] Most of the thermal management systems of new energy vehicles are cooled by water cooling, using coolant. There are many cooling water pipe parts in the thermal management system. The most common failure of cooling water pipes is coolant leakage, which needs to remain sealed under a certain pressure of the flowing medium at high and low temperatures. This requires the material of the parts to have good heat aging performance, medium resistance performance, and maintain good mechanical properties and elasticity (compression set) at high and low temperatures. [0003] The cooling hose of the new energy vehicle thermal management system follows the EPDM (ethylene propylene diene monomer) rubber cooling water pipe of the fuel engine. Compared with EPDM rubber, thermoplastic elastomer material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/12C08K5/20C08K3/34C08K3/04C08K5/1575
Inventor 王亮高祥达熊芬李明桓姚响林
Owner DONGFENG MOTOR GRP
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