Rubber compositions and processing methods and applications, and production methods for such applications

A technology of rubber composition and rubber matrix, applied in the field of rubber, can solve the problems of difficult free radical reaction, large steric hindrance, and difficult crosslinking, etc., achieve good compression set resistance, improve crosslinking ability, and avoid stress concentration Effect

Active Publication Date: 2021-05-14
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 compositions and processing methods and applications, and production methods for such applications
  • Rubber compositions and processing methods and applications, and production methods for such applications
  • Rubber compositions and processing methods and applications, and production methods for such applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] The branched polyethylene number used is PER-4.

[0119] The processing steps are as follows:

[0120] (1) Rubber mixing: set the temperature of the internal mixer to 90°C, and the rotor speed to 50 rpm, add 70 parts of EPDM rubber and 30 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 40 parts of white Carbon black, knead for 3 minutes; then add 2 parts of cross-linking agent dicumyl peroxide (DCP), knead for 2 minutes and degum. Thinly pass the mixed rubber on the open mill, increase the roller distance to obtain a thin sheet with a thickness of about 2.5mm, and park it for 20 hours. Re-smelting, make triangular bags 3 times on the open mill, adjust the roller distance to 2.5mm, and unload.

[0121] (2) Perform various tests after parking for 16 hours after vulcanization.

Embodiment 2

[0123] The branched polyethylene number used is PER-4.

[0124] The processing steps are as follows:

[0125] (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 40 parts of white Carbon black, knead for 3 minutes; then add 2 parts of cross-linking agent dicumyl peroxide (DCP), knead for 2 minutes and degum. Thinly pass the mixed rubber on the open mill, increase the roller distance to obtain a thin sheet with a thickness of about 2.5mm, and park it for 20 hours. Re-smelting, make triangular bags 3 times on the open mill, adjust the roller distance to 2.5mm, and unload.

[0126] (2) Perform various tests after parking for 16 hours after vulcanization.

Embodiment 3

[0128] The branched polyethylene number used is PER-4.

[0129] The processing steps are as follows:

[0130] (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; add 40 parts of white carbon black, and mix for 3 minutes; Then add 2 parts of cross-linking agent dicumyl peroxide (DCP), mix for 2 minutes, and remove the glue. Thinly pass the mixed rubber on the open mill, increase the roller distance to obtain a thin sheet with a thickness of about 2.5mm, and park it for 20 hours. Re-smelting, make triangular bags 3 times on the open mill, adjust the roller distance to 2.5mm, and unload.

[0131] (2) Perform various tests after parking for 16 hours after vulcanization.

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Abstract

The invention discloses a rubber composition and its processing method, as well as the application of using the composition to process white carbon black reinforced rubber products. The rubber composition includes: a rubber matrix and necessary components. The rubber matrix includes: Content a of branched polyethylene: 0<a≤100 parts; content b of ethylene-propylene diene rubber and ethylene-propylene diene rubber: 0≤b<100 parts; necessary components include: 1 to 10 parts of cross-linking agent, White carbon black is 15 to 80 parts. The beneficial effect is that the rubber composition has high mechanical strength and can be used to produce high-voltage insulating sheath rubber, high-temperature resistant conveyor belts, waterproof membranes, colored rubber particles for the surface of plastic runways, rubber plugs, rubber rollers, and inner tubes. , tire tread, tire sidewall, inner rubber layer of air conditioning hose.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a rubber composition reinforced by white carbon black and a processing method thereof, as well as a rubber product using the rubber composition and a production method. Background technique [0002] Silica is currently the most commonly used light-colored filler with good reinforcement. Ethylene-propylene rubber reinforced with silica often has good tear resistance, high adhesion strength, wet-slip resistance, wear resistance and biochemical properties. The heat is small, and can be used to produce various rubber products such as waterproof membranes, conveyor belts, plastic runways, washing machine door seals, rubber rollers, rubber plugs, rubber plugs, inner tubes, tire treads, tire sidewalls, air-conditioning hoses, etc. However, it is weaker than ethylene-propylene rubber products reinforced by carbon black in terms of resilience and compression set resistance. Su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/06C08L71/02C08K13/02C08K3/36C08K5/14C08K3/06C08K3/22C08K5/09H01B3/28H01B3/44B65G15/34B60C1/00B29B9/06B29C35/02B29C43/24
CPCH01B3/28H01B3/441B65G15/34C08K3/06C08K3/36C08K5/14C08L23/06C08L23/16B29B9/06B29C35/02B29C43/24B60C1/0016B60C1/0025C08K2003/2296C08L2205/035C08L2205/03C08L2205/025C08L2203/18C08L2207/07C08L71/02C08K13/02C08K3/22C08K5/09B29B7/183B29B7/005B29B7/103B29B7/286B29B7/7495B29K2995/0088B29K2105/0094B29K2023/16B29K2019/00B29L2031/7092B29L2023/005B29L2023/007B29L2023/006C08L91/00C08K3/346C08F110/02C08F4/7006C08F2500/09C08F2500/04C08F2500/17B29K2509/08C08F10/02C08F2810/20C08L2203/202C08L2312/00
Inventor 不公告发明人
Owner HANGZHOU XINGLU TECH CO LTD
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