Tire rubber composition comprising an acetylacetonate compound

A technology of rubber composition and chromium acetylacetonate, which is applied in the field of anti-degradation agent system and anti-degradation agent, semi-finished products or products such as rubber composition of tires, which can solve the problems of changing the internal structure of tires, high cost, complicated manufacturing, etc.

Inactive Publication Date: 2012-12-12
OCIETE DE TECH MICHELIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Using such an antioxidant reservoir, while effective, has the disadvantage of having to alter the internal structure of the tire, thus making their manufacture more complex and costly

Method used

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  • Tire rubber composition comprising an acetylacetonate compound
  • Tire rubber composition comprising an acetylacetonate compound
  • Tire rubber composition comprising an acetylacetonate compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0118] A) Use of the composition of the invention in tires

[0119] The rubber composition of the invention described above can be used for the manufacture of any semi-finished or finished product composed of rubber, in particular for automobile tires, whether the composition is external or internal to the tire structure.

[0120] The "outer" composition (or mixture) is here understood to mean any tire component made of rubber facing the outside of the tyre, that is to say in contact with air or inflation gas; particular mention is made of the tire's tread, tire side wall or airtight layer.

[0121] Conversely, "inner composition" (or mixture) is understood to mean any tire component made of rubber that is not facing the outside of the tyre, that is to say not in contact with air or inflation gas, and therefore is actually located inside the structure of the tire; And the calendered compound, carcass reinforcement or crown reinforcement present in the bead area of ​​the tyr...

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Abstract

Rubber composition which can be used in particular for the manufacture of s, comprising at least a diene elastomer, a reinforcing filler, a crosslinking system, between 0.2 and 10 phr of an antioxidant, such as a substituted para-phenylenediamine, and between 0.2 and 10 phr of chromium (III) acetylacetonate. This acetylacetonate compound makes it possible to advantageously reduce the consumption of antioxidant during the thermo-oxidizing ageing of the composition. Metal / rubber composite comprising such a composition and at least a metal reinforcing member. comprising such a composition or such a composite.

Description

technical field [0001] The technical field of the invention is that of rubber compositions which can be used in particular for the manufacture of semi-finished products or products made of rubber, such as tyres. [0002] The present invention relates more particularly to antidegradant systems and antidegradants for protecting these rubber compositions against aging due to oxidation. Background technique [0003] It is known that substantially unsaturated diene vulcanizates, whether natural or synthetic, if unprotected, due to the presence of double bonds in their molecular chains, are susceptible to oxidation after prolonged exposure to the environment due to known oxidation mechanisms Aging quickly or slowly. These complex mechanisms have been described eg in patent documents WO 99 / 02590 and WO 99 / 06480. After these double bonds are broken and the sulfur bridges oxidized, they cause hardening and decay of the vulcanizate, the damage being accelerated by the combined actio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/098C08L21/00C08L7/00C08K5/18
CPCC08K5/098C08K5/005C08K3/0033C08K5/0091B60C1/00C08K3/013C08L21/00
Inventor 牧内和美S·帕加诺
Owner OCIETE DE TECH MICHELIN
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