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Rubber composition for tyre including a novel anti-oxidant system

A rubber composition, anti-oxidant technology, applied in anti-oxidant, crown reinforcement, "belt". field, which can solve the problem of increasing long-term fatigue resistance and crack growth resistance

Inactive Publication Date: 2013-01-23
MICHELIN & CO CIE GEN DES ESTAB MICHELIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Now, the applicant has discovered in the course of research that it is possible to increase the combination of these rubbers used in tires by replacing a part of this p-phenylenediamine derived antioxidant with another specific antioxidant which has not been used in tires so far. long-term fatigue resistance and crack growth resistance

Method used

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  • Rubber composition for tyre including a novel anti-oxidant system
  • Rubber composition for tyre including a novel anti-oxidant system
  • Rubber composition for tyre including a novel anti-oxidant system

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Experimental program
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Embodiment Construction

[0033] I. Measurements and tests used

[0034] The rubber compositions were characterized before and after curing as described below.

[0035] A) Rheological measurement:

[0036] The measurement is carried out at 150° C. according to standard DIN 53529-Part 3 (June 1983) using an oscillating chamber rheometer. The change in rheological torque over time describes the change in hardening of the composition with the vulcanization reaction. Measurements carried out according to standard DIN 53529-Part 2 (March 1983): t i is the induction time, that is, the time required for the vulcanization reaction to start; t α (e.g. t 99 ) is the time required to obtain α% conversion, ie α% (eg 99%) of the difference between minimum and maximum torque. Also determined expressed by K (in minutes -1 A first-order conversion constant calculated from conversions between 30% and 80% makes it possible to evaluate the vulcanization kinetics.

[0037] B) Tensile test:

[0038] These tests ma...

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Abstract

Rubber composition, especially for a tire, based on at least one diene elastomer, a reinforcing filler, a crosslinking system and an antioxidant system, wherein said antioxidant system comprises at least two antioxidants “A” and “B”: A. an N-alkyl-N′-phenyl-para-phenylenediamine corresponding to the formula (I): B. a 4,4′,4″-tris(alkylamino)triphenylamine corresponding to the formula (II): in which formulae, R1, R2, R3 and R4, which are identical or different, each represent a linear or branched alkyl group having from 1 to 12 carbon atoms or a cycloalkyl group having from 5 to 8 carbon atoms, the A / B weight ratio being between 0.1 and 5.0.

Description

technical field [0001] The present invention relates to diene elastomer compositions and also to antioxidants for the protection against aging of such compositions. [0002] More particularly, the invention relates to diene elastomer compositions for forming all or part of the rubber matrix of tyres, in particular the crown reinforcement, also called "belt", of these tyres. Background technique [0003] A brief review of tires with radial carcass reinforcement comprising, in a known manner, a tread, two inextensible beads, two sidewalls connecting the beads to the tread, and A belt placed circumferentially between treads, consisting of various rubber plies (or "layers"), which may or may not be composed of metallic or textile type reinforcing elements (or "reinforcement"), such as cord or monofilament reinforcement. [0004] A tire belt usually consists of at least two overlapping belt plies or belt plies (sometimes referred to as "working" plies or "crossing" plies) which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/18C08L9/00B60C1/00C08K3/04
CPCC08K3/04C08K5/18C08K3/0033C08K5/0008C08K3/013Y10T152/1081C08L21/00
Inventor J·C·阿劳约达席尔瓦A·雷米
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN