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Rubber composition and processing method, and brake fluid-resistant product using same and production method

A technology of rubber composition and rubber matrix, which is applied in the field of rubber and can solve problems such as difficult crosslinking, large steric hindrance, and difficult free radical reaction

Active Publication Date: 2021-04-06
HANGZHOU XINGLU TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Rubber generally needs to be cross-linked before use. Among the commonly used cross-linking methods for ethylene-propylene rubber, peroxide cross-linking or radiation cross-linking are suitable for ethylene-α-olefin copolymers. Both are mainly through the capture of tertiary carbons. Hydrogen atoms form tertiary carbon radicals, and then form carbon-carbon crosslinks through free radicals, but the copolymer of ethylene and 1-octene (hereinafter referred to as POE) has fewer tertiary carbon atoms, and the branch connected to the tertiary carbon atoms Chain length, large steric hindrance, difficult free radical reaction, resulting in difficulty in crosslinking, affecting processing efficiency and product performance, such as unsatisfactory compression set resistance

Method used

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  • Rubber composition and processing method, and brake fluid-resistant product using same and production method
  • Rubber composition and processing method, and brake fluid-resistant product using same and production method
  • Rubber composition and processing method, and brake fluid-resistant product using same and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The number of branched polyethylene used is PER-3.

[0084] The processing steps of rubber composition are as follows:

[0085] (1) Rubber mixing: set the temperature of the internal mixer to 90°C, and the rotor speed to 50 rpm, add 50 parts of EPDM rubber and 50 parts of branched polyethylene for pre-compression mixing for 90 seconds; Add 70 parts of carbon black N550 and 10 parts of liquid polyisobutylene, and knead for 3 minutes; finally add 4 parts of cross-linking agent dicumyl peroxide (DCP), knead for 2 minutes and remove the rubber, and put the mixed rubber on the roller The temperature is 60 ℃ on the open mill to pass the thin pass, get the flakes with a thickness of about 2.5mm, park for 20 hours;

[0086] (2) Perform various tests after parking for 16 hours after vulcanization.

Embodiment 2

[0088] The number of branched polyethylene used is PER-3.

[0089] The processing steps of rubber composition are as follows:

[0090] (1) Rubber mixing: set the temperature of the internal mixer to 90°C, the rotor speed to 50 rpm, add 100 parts of branched polyethylene for pre-compression mixing for 90 seconds; then add 70 parts of carbon black N550 and 10 parts of liquid polyisobutylene, knead for 3 minutes; finally add 4 parts of cross-linking agent dicumyl peroxide (DCP), knead for 2 minutes and then remove the glue. Thinly pass the mixed rubber on an open mill with a roller temperature of 60°C to obtain a thin sheet with a thickness of about 2.5mm, and park it for 20 hours;

[0091] (2) Perform various tests after parking for 16 hours after vulcanization.

Embodiment 3

[0093] The branched polyethylene numbers used are PER-3 and PER-6.

[0094] The processing steps of rubber composition are as follows:

[0095] (1) Rubber mixing: set the temperature of the internal mixer to 90°C, the rotor speed to 50 rpm, add 70 parts of PER-3 and 30 parts of PER-6 for pre-compression mixing for 90 seconds; then add 70 parts of PER-6 to the rubber compound 1 part of carbon black N550 and 10 parts of liquid polyisobutylene, mixed for 3 minutes; finally add 4 parts of cross-linking agent dicumyl peroxide (DCP), after mixing for 2 minutes, remove the rubber, and mix the rubber at a temperature of 60 Thin pass on the open mill at ℃ to get flakes with a thickness of about 2.5mm, and park for 20 hours;

[0096] (2) Perform various tests after parking for 16 hours after vulcanization.

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Abstract

The invention discloses a rubber composition and a processing method thereof, and also provides an application of the rubber composition and a method for producing the application. In parts by weight, the rubber composition includes: rubber matrix: 100 parts; Crosslinking agent: 1.5 to 8 parts; Reinforcing filler: 40 to 140 parts; Plasticizer: 0 to 40 parts; Among them, the rubber matrix contains the following components, all of which are calculated in parts by weight: content of branched polyethylene a: 0 < a ≤ 100 parts; content of binary ethylene propylene rubber b: 0 ≤ b < 100 parts; content of EPDM rubber c: 0 ≤ c < 100 parts, the application of the rubber composition is to manufacture resistant Hydraulic brake hoses, brake cups. The beneficial effect is that, because the rubber composition has branched polyethylene, the tear strength of the rubber compound can be improved, thereby reducing the probability of tearing of the product during the production process and improving the overall processing performance.

Description

technical field [0001] The invention belongs to the field of rubber, and in particular relates to a rubber composition and a processing method thereof. The invention also relates to a brake fluid-resistant product using the rubber composition and a production method. Background technique [0002] Because ethylene-propylene rubber has excellent brake fluid resistance and low water permeability, and can withstand local high temperatures caused by high speed and frequent braking, it is currently used to produce brake hoses, brake cups or other seals that contact brake fluid , aging-resistant ethylene-propylene rubber has become the most important type of rubber. With the development of the automobile industry, the anti-aging requirements for brake fluid-resistant automotive rubber products are getting higher and higher. Such brake fluid-resistant rubber products tend to be vulcanized with peroxide, while peroxide vulcanized The tear strength of the post-rubber is lower than th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/06C08L23/20C08K13/02C08K5/14C08K3/22C08K5/09C08K3/04F16L11/04F16D65/02B29C48/151B29C43/02B29C35/02
CPCF16D65/02F16L11/04C08L23/06C08L23/16B29C35/02B29C43/02B29C48/151C08L2207/07C08L2205/035C08L2205/03C08L2205/025C08L2205/02C08L2203/18C08K2003/2296C08L23/22C08K3/04C08K5/14C08K13/02C08K3/22C08K5/09B60T17/04C08K3/26C08K3/346C08K5/0025C08K2003/265C08L71/00C08L2312/00F16L11/08
Inventor 不公告发明人
Owner HANGZHOU XINGLU TECH CO LTD
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