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Epoxidized polyisoprene rubber composition

A technology of rubber composition and polyisoprene, which is used in transportation and packaging, special tires, tire parts, etc., can solve the problems of increasing the internal temperature of the tire, reducing the durability of the tire, and increasing the hysteresis of the rubber composition.

Active Publication Date: 2018-07-03
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these solutions generally have the disadvantage of increasing the hysteresis of the rubber composition
The use of hysteresis compositions in tires can significantly increase the internal temperature of the tire, which can lead to a reduction in the durability of the tire

Method used

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  • Epoxidized polyisoprene rubber composition

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Embodiment Construction

[0016] In this specification, all percentages (%) shown are % by weight unless otherwise expressly stated. The abbreviation "phr" (French abbreviation "pce") denotes parts by weight per hundred of the elastomer present in the rubber composition.

[0017] Furthermore, any numerical interval indicated by the expression "between a and b" represents a numerical range greater than "a" and less than "b" (i.e. excluding the limits a and b), whereas any numerical interval indicated by the expression "a to b" Any numerical interval is intended to mean a numerical range extending from "a" up to "b" (ie, including the strict limits a and b).

[0018] "Polyisoprene matrix" is intended to mean all polyisoprenes and epoxidized polyisoprenes present in the rubber composition.

[0019] "Polyisoprene" is intended to mean non-epoxidized polyisoprene. The polyisoprene may be natural rubber, a synthetic polyisoprene having at least 90 mole percent 1,4-cis linkages, or a mixture thereof.

[002...

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Abstract

The present invention relates to rubber compositions which improve the compromise between cured stiffness and hysteresis of the composition. The composition comprises: 0 to less than 20 phr of butyl rubber; greater than 50 to 100 phr of a polyisoprene matrix containing rings in an epoxidized molar ratio of 5% to less than 0% Oxidized polyisoprene; carbon black and silica, the weight of carbon black being greater than 50% of the total weight of carbon black and silica; 0 to less than 2 phr of a coupling agent; and a crosslinking system. Epoxidized polyisoprenes are natural epoxidized rubbers, synthetic epoxidized polyisoprenes having at least 90 molar proportions of cis-1,4 linkages prior to epoxidation, or mixtures thereof, Provided that the rubber composition contains more than 50 phr of epoxidized polyisoprene if the epoxidized polyisoprene is an epoxidized polyisoprene having an epoxidized molar ratio of 5% to 25%. alkene.

Description

technical field [0001] The field of the invention is that of rubber compositions reinforced with reinforcing fillers, which can be used in the manufacture of vehicle tyres. Background technique [0002] Rubber compositions reinforced with reinforcing fillers must satisfy a large number of often contradictory technical requirements when they are used in tires. Rubber compositions used in tire components may require that they have some degree of stiffness in the cured state, while having as low hysteresis as possible. In order to increase the stiffness of the rubber composition in the cured state, it is known, for example, to increase the filler content in the rubber composition or to introduce a styrene / butadiene copolymer with a high styrene content. However, these solutions generally have the disadvantage of increasing the hysteresis of the rubber composition. The use of hysteresis compositions in tires can significantly increase the internal temperature of the tire, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C1/00C08L9/00C08L15/00
CPCB60C1/0016C08L15/00C08L23/22C08K3/04B60C1/00C08J3/20C08K3/36C08L7/00C08L9/00C08C19/06
Inventor A·约瑟夫J·克拉迪埃
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN