Cold-resistant low-compression permanent deformation rubber composition and preparation method thereof

Abstract

The invention provides a cold-resistant low-compression permanent deformation rubber composition, which comprises the following raw materials by weight: 100 parts of ethylene propylene diene monomer,3-10 parts of zinc oxide, 90-130 parts of carbon black, 30-40 parts of hydrogenated paraffin oil, 10-20 parts of dibutyl sebacate, 0.5-1.5 parts of dicumyl peroxide, 0.5-1.5 parts of N,N'-bisfurfurylideneacetone, 1-3 parts of an anti-aging agent MB, and 1-3 parts of graphite. According to the present invention, the rubber composition for the rubber vibration reducing pas or sealing pad is preparedby using the ethylene propylene diene monomer as the matrix material, using the carbon black as the reinforcing agent, using the hydrogenated paraffin oil and the dibutyl sebacate as the plasticizer,and using the dicumyl peroxide and the N,N'-bisfurfurylideneacetone as the vulcanizing agent, and has advantages of excellent cold resistance, excellent aging resistance and excellent low-compressionpermanent deformation.

Description

technical field [0001] The invention belongs to the field of rubber, and in particular relates to a rubber composition with excellent cold resistance, aging resistance and low compression set and a preparation method thereof. Background technique [0002] The Qinghai-Tibet Plateau has low temperature all year round and strong ultraviolet radiation. Due to the rich geothermal resources and the high content of sulfur dioxide in the air, EPDM rubber has become the best rubber type for various rubber damping pads on the Qinghai-Tibet Plateau railway line. EPDM rubber is copolymerized from three monomers of ethylene, propylene and non-conjugated diene. EPDM rubber has excellent resilience, ozone resistance, high and low temperature resistance, weather resistance, aging resistance and chemical resistance. [0003] Chinese patent CN107189236A discloses a heat-aging-resistant, low-pressure variable sulfur-vulcanized EPDM composition, preparation method, use and application products...

AI Technical Summary

Problems solved by technology

Inorganic non-metallic fillers have poor compression permanent properties compared to pure carbon black compositions

The raw rubber used in this invention is EPDM 3092E, the ethylene content of this grade of raw rubber is greater than 60%, and the low temperature performance is not good; its products only focus on heat resistance, not low temperature performance

[0005] Chinese patent CN201010570618.3 discloses a

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