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Rubber composition comprising epoxidized elastomer crosslinked by polycarboxylic acid

A technology of rubber composition and composition, applied in the field of rubber composition, capable of solving problems such as damage to composition processing

Active Publication Date: 2018-10-16
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such systems are known to impair the processing of the composition prior to curing through the phenomenon of scorch

Method used

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  • Rubber composition comprising epoxidized elastomer crosslinked by polycarboxylic acid
  • Rubber composition comprising epoxidized elastomer crosslinked by polycarboxylic acid
  • Rubber composition comprising epoxidized elastomer crosslinked by polycarboxylic acid

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Experimental program
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Embodiment Construction

[0035] I. test

[0036] After curing the rubber compositions were characterized as follows.

[0037] Tensile test:

[0038]These tensile tests make it possible to determine elastic stress and fracture properties. Tensile tests were performed according to French standard NF T 46-002, September 1988, unless otherwise stated. Taking tensile recordings also made it possible to plot the modulus versus elongation, the modulus used here being the nominal (or apparent) secant modulus measured in the first elongation, by reduction to the test specimen calculated from the initial section. After the second elongation (i.e. after the conditioning cycle at the rate of elongation provided by the measurement itself), at 10% elongation (indicated in ASM10) (“ASM” is abbreviated in French as “MSA”) or at 50% elongation (in The nominal secant modulus (or apparent stress, expressed in MPa) is measured at ASM50. Tensile measurements for determination of breaking stress (MPa) and breaking ...

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PUM

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Abstract

The invention relates to a rubber composition based on at least a majority elastomer comprising epoxide functions, a reinforcing filler, and a system for cross-linking the elastomer, comprising an imidazole and a polycarboxylic acid of general formula (I), in which A represents a hydrocarbon divalent group comprising a majority of type (Ia) units.

Description

technical field [0001] The present invention relates to rubber compositions, in particular rubber compositions based on elastomers containing epoxy functional groups. Background technique [0002] Furthermore, the use in tires of rubber compositions having an elastomeric matrix crosslinked with sulfur is known and has been widespread for many years; this crosslinking is called vulcanization. Conventional vulcanization systems combine molecular sulfur with at least one vulcanization accelerator. However, such systems are known to impair the processing of the composition prior to curing through the phenomenon of scorch. It should be borne in mind that during the preparation of rubber compositions, the phenomenon of "scorch" in the raw state at very high viscosities rapidly leads to premature vulcanization ("scorch"), finally resulting in practically impossible handling and industrial processing rubber composition. [0003] Therefore, in order to overcome the above-mentioned...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/02C08G59/42C08G59/50C08L15/00
CPCC08G59/027C08G59/4269C08G59/5073C08L15/00
Inventor B·施内尔E·弗勒里
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN