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Modified rubber compound and preparation method thereof, vulcanized rubber and application thereof

A technology of modified rubber and vulcanized rubber, which is applied in the field of vulcanized rubber to prepare tires, vulcanized rubber, modified rubber compound, and the preparation of modified rubber compound. It can solve the problems of affecting polymerization reaction and difficult removal of small molecules, and achieve excellent Effects of wear resistance, good mechanical properties, and low rolling resistance

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology is to introduce polar groups into the molecular chain through end-capping or free radical polymerization after the rubber polymerization process is completed, but the remaining small molecules containing polar groups are difficult to remove from the polymerization system. Affect the subsequent polymerization reaction

Method used

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  • Modified rubber compound and preparation method thereof, vulcanized rubber and application thereof

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preparation example Construction

[0015] The invention provides a method for preparing a modified rubber compound, the method comprising: (1) contacting rubber and alkylphenol disulfide for the first time under the first mixing condition to obtain a modified rubber; The first mixing conditions include: the mixing temperature is 70-150°C, and the mixing time is 5-30 minutes; (2) Under the second mixing conditions, the modified rubber, silica and coupling The agent is contacted for the second time to obtain a modified rubber compound. Preferably, the first kneading conditions include: kneading temperature is 120-140° C., and kneading time is 15-25 minutes.

[0016] According to the present invention, contacting the alkylphenol disulfide with the rubber under the mixing conditions can improve the surface properties of the rubber and facilitate the dispersion of the white carbon black when mixed with the white carbon black. The reason may be that the disulfide bond in the alkylphenol disulfide chemically reacts w...

Embodiment 1

[0037] 100 grams of solution-polymerized styrene-butadiene rubber (weight-average molecular weight of 500,000) and 4 grams of p-tert-butylphenol disulfide (Arkema, Vultac2) were first mixed, and the first mixing conditions included: the mixing temperature was 140 °C, the first mixing speed was 45 rpm, and the mixing time was 20 minutes to obtain a modified rubber.

[0038] Then 60 grams of white carbon black (specific surface area is 115m 2 / g) and 4.2 grams of bis-(γ-triethoxysilylpropyl)-tetrasulfide and the above-mentioned modified rubber are mixed for the second time. The second mixing conditions include: the mixing temperature is 155°C, the second The mixing speed was 50 rpm, and the mixing time was 10 minutes to obtain the modified rubber compound M1.

Embodiment 2

[0042] 100 grams of cis-polybutadiene rubber (with a weight average molecular weight of 200,000) and 5 grams of p-tert-amylphenol disulfide (Arkema, Vultac TB7) were first mixed, and the first mixing conditions included: mixing The temperature was 130° C., the first mixing speed was 50 rpm, and the mixing time was 18 minutes to obtain a modified rubber.

[0043] Then 50 grams of white carbon black (specific surface area is 175m 2 / g) and 2.5 grams of bis-(γ-triethoxysilylpropyl)-disulfide are mixed with the above-mentioned modified rubber for the second time. The second mixing conditions include: the mixing temperature is 165°C, the second The mixing speed was 40 rpm, and the mixing time was 15 minutes to obtain the modified rubber compound M2.

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Abstract

The invention discloses a preparation method of a modified rubber compound. The method includes: (1) under first mixing conditions, contacting rubber with alkylphenol disulfide for the first time to obtain modified rubber, with the first mixing conditions including: a mixing temperature of 70-150DEG C and a mixing time of 5-30min; and (2) under second mixing conditions, containing the modified rubber, white carbon black and a coupling agent for the second time so as to obtain the modified rubber compound. The invention also discloses the modified rubber compound prepared by the method, and vulcanized rubber containing the modified rubber compound as well as application of the vulcanized rubber to preparation of tires. The vulcanized rubber provided by the invention contains the modified rubber compound prepared by the method provided by the invention, and has good mechanical properties, lower rolling resistance, better wet skid resistance and excellent wear resistance.

Description

technical field [0001] The present invention relates to a modified rubber compound and a preparation method thereof, vulcanized rubber and its application, in particular to a method for preparing a modified rubber compound, a modified rubber compound prepared by the method, and a modified rubber compound containing the modified rubber compound. Vulcanizates of rubber compounds and the use of the vulcanized rubbers in the production of tires. Background technique [0002] With the continuous aggravation of the worldwide energy crisis and environmental pollution, people pay more and more attention to energy saving and environmental protection. In order to reduce fuel consumption and greenhouse gas emissions, the automobile industry is also developing towards energy saving and environmental protection. In November 2012, the EU tire labeling regulations were officially implemented, requiring maximum tire safety, reduced fuel consumption, and reduced noise. Therefore, the requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L9/00C08L23/16C08K5/375C08K3/36C08K5/548C08K13/02
CPCC08K3/36C08K5/375C08K5/548C08K2201/006C08K2201/011C08L9/06C08L9/00C08L23/16C08K13/02Y02T10/86
Inventor 曲亮靓解希铭李静王丽丽赵青松刘苹刘翠云李绍宁乔勋昌
Owner CHINA PETROLEUM & CHEM CORP
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