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Rubber composition and processing method, and high-strength products using the same and production method

A rubber composition and high-strength technology, applied in the rubber field, can solve the problems affecting processing efficiency and product performance, difficult free radical reaction, large steric hindrance, etc., achieve good electrical insulation performance and mechanical strength, wide application, insulation good effect

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

[0007] Rubber generally needs to be cross-linked before use. Among the commonly used cross-linking methods of ethylene-propylene rubber, peroxide cross-linking or radiation cross-linking are suitable for ethylene-α-olefin copolymers. Both of them 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

Method used

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  • Rubber composition and processing method, and high-strength products using the same and production method
  • Rubber composition and processing method, and high-strength products using the same and production method
  • Rubber composition and processing method, and high-strength products using the same and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] The number of branched polyethylene used in this example is PER-9.

[0115] The processing method is as follows:

[0116] (1) Rubber mixing: set the temperature of the internal mixer to 100°C, and the rotor speed to 50 rpm, add 90 parts of binary ethylene propylene rubber and 10 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 5 parts of oxidized Zinc, 1 part of stearic acid, 2 parts of anti-aging agent RD, knead for 30 seconds; then add 100 parts of talcum powder, 20 parts of paraffin oil SUNPAR2280 to the rubber compound, knead for 3 minutes; finally add 3 parts of cross-linking agent peroxide Dicumyl (DCP), 1 part of triallyl isocyanurate (TAIC), a co-crosslinking agent, mixed for 2 minutes and then discharged. 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;

[0117] (2) Vulcanization: Vulcanize at 160°C and 16MPa pressure fo...

Embodiment 2

[0119] The number of branched polyethylene used in this example is PER-2.

[0120] The processing method is as follows:

[0121] (1) Rubber mixing: set the temperature of the internal mixer to 60°C, and the rotor speed to 50 rpm, add 70 parts of binary ethylene propylene rubber and 30 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 5 parts of oxidized Zinc, 1 part of stearic acid, 2 parts of antioxidant RD, knead for 30 seconds; then add 100 parts of talc powder, 10 parts of paraffin oil SUNPAR2280 to the rubber compound, knead for 3 minutes; finally add 3 parts of crosslinking agent DCP, 0.3 parts of sulfur, after mixing for 2 minutes, remove the glue. Thinly pass the mixed rubber on an open mill with a roller temperature of 40°C to obtain a thin sheet with a thickness of about 2.5mm, and park it for 20 hours.

[0122] (2) Vulcanization: Vulcanize at 160°C and 16MPa pressure for 30 minutes, and conduct various tests after parking for 16 hours. ...

Embodiment 3

[0124] The number of branched polyethylene used in this example is PER-4.

[0125] The processing method is as follows:

[0126] (1) Rubber mixing: set the temperature of the internal mixer to 80°C, and the rotor speed to 50 rpm, add 50 parts of binary ethylene propylene rubber and 50 parts of branched polyethylene for pre-compression mixing for 90 seconds; add 5 parts of oxidized Zinc, 1 part of stearic acid, 2 parts of anti-aging agent RD, knead for 30 seconds; then add 100 parts of talc powder, 20 parts of paraffin oil SUNPAR2280 to the rubber compound, knead for 3 minutes; finally add 3 parts of crosslinking agent DCP, 1 part of auxiliary cross-linking agent TAIC, after mixing for 2 minutes, 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.

[0127] (2) Vulcanization: Vulcanize at 160°C and 16MPa pressure for 30 minutes, and conduct various test...

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Abstract

The invention discloses a rubber composition. The rubber composition comprises a rubber matrix and a crosslinking system. The rubber matrix comprises the following components in parts by weight: the content of branched polyethylene is a: 0<a≤ 100 parts, content b of EPDM rubber: 0≤b<100 parts, content c of EPDM rubber: 0≤c<100 parts, based on 100 parts by weight of the rubber matrix, the content of the crosslinking system d: 1≤d≤15 parts, the cross-linking system contains at least one of a cross-linking agent and an auxiliary cross-linking agent, and the degree of branching of the branched polyethylene is not less than 50 branches / 1000 carbons , the weight average molecular weight is not less than 50,000, and the Mooney viscosity ML(1+4) is not less than 2 at 125°C. The new rubber composition provided by the invention can effectively solve the problems of low crosslinking efficiency and mechanical strength in the prior art, and simultaneously obtain good electrical insulation performance and mechanical strength.

Description

technical field [0001] The invention belongs to the field of rubber, and in particular relates to a rubber composition and a processing method for obtaining the rubber composition. The invention also relates to a high-strength rubber product using the rubber composition and a production method of the product. Background technique [0002] Ethylene-propylene rubber has good electrical insulation properties and has become a widely used insulating material. Ethylene-propylene rubber can be divided into two categories: ethylene-propylene-diene rubber (EPM) and ethylene-propylene-diene rubber (EPDM). Compared with the two, EPM has better electrical insulation performance and aging resistance, but the vulcanization speed is too slow. , low mechanical properties; and EPDM has a faster vulcanization rate and higher mechanical properties, but the electrical insulation performance is reduced, so there are deficiencies in practical applications. [0003] Rubber is also widely used in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/06C08L91/06C08K13/02C08K3/22C08K5/09C08K3/34H01B7/02H01B7/17H01B7/18H01B13/00H01B13/14H01B13/24A41D19/00
CPCA41D19/0055H01B7/0275H01B7/17H01B7/18H01B13/0016H01B13/145H01B13/148H01B13/24C08L23/06C08L23/16C08L2203/202C08L2205/035C08L2205/025C08L2205/03C08K2003/2296C08L91/06C08K13/02C08K3/22C08K5/09C08K3/34C08L2203/02C08L23/0815C08K5/0025C08K3/20C08K5/0016C08K5/005C08K3/013C08K3/26C08K5/01C08K5/14C08K5/3477C08K5/47C08K5/5419C08K2003/2206C08K2003/2217C08K2003/2234C08K2003/2237C08K2003/265C08L2205/02C08L2312/08
Inventor 不公告发明人
Owner HANGZHOU XINGLU TECH CO LTD
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