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Reinforced product comprising a composition with a low sulphur content and tyre comprising said reinforced product

A composition, sulfur content technology, applied in the direction of the reinforcement layer of pneumatic tires, special tires, tire parts, etc., can solve the problems of preparation of semi-finished products, prolonged preparation time, cracking of the mixture, etc.

Active Publication Date: 2017-09-26
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although this particular vulcanization system makes it possible to obtain a desirable bond between the cord and the surrounding rubber composition, it constitutes a significant limitation during the production of semi-finished products
Can especially affect processability, cure time or modulus of elongation, causing processing difficulties, longer preparation times and thus higher costs for reinforced semi-finished products
In addition, this particular vulcanization system develops a certain sensitivity to thermal oxidation, causing the mixture to change over time, which can lead to cracking of the mixture

Method used

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  • Reinforced product comprising a composition with a low sulphur content and tyre comprising said reinforced product
  • Reinforced product comprising a composition with a low sulphur content and tyre comprising said reinforced product
  • Reinforced product comprising a composition with a low sulphur content and tyre comprising said reinforced product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] 3.3 - Example 1 - Rubber Test

[0145] For the requirements of these tests, rubber compositions were prepared according to the invention, the formulations of which are given in Table 1; the contents of the different products are expressed in phr (parts by weight per one hundred parts by weight of elastomer).

[0146] These compositions were prepared using the following procedure: Reinforcing fillers (carbon black and / or silica), diene elastomer and various other ingredients, in addition to the vulcanization system, were introduced continuously into an internal mixer which The initial vessel temperature was about 50°C; the mixer was thus filled to about 70% (volume %). Thermomechanical processing (non-production stage) is then carried out in one step for about 3 to 5 minutes until a maximum "dropping" temperature of 160°C is reached. The mixture thus obtained is recovered and cooled before introducing sulfur and accelerators of sulfenamide type in an external mixer (h...

Embodiment 2

[0170] 3.4 - Example 2 - Test of adhesion of coating composition and filamentary reinforcement

[0171] In order to test the adhesion of the coating composition on the filamentary reinforcement, the measurement is carried out according to the standard ASTM D2229.

[0172] Compositions C(a), C(b) (control) and C(c) presented in Table 3 below (according to the invention and identical to C4 above) are combined with brass metal reinforcement, which Reinforcement consists of 2+7 0.7% carbon steel wires 28 / 100mm diameter with an assembled lay length of 7.5mm / 15mm, brass contains 68% copper, clad or unclad, as shown in table 4 below , and the adhesion of the coating composition to the reinforcement was tested for these combinations. In the case of reinforcement cladding, the cladding is made of polyamide 6-6, the average thickness of the cladding is about 0.14 mm for a clad cord diameter of ca. 1.35 mm, and is bonded by RFL agent coverage.

[0173] table 3

[0174]

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Abstract

The invention relates to a reinforced product, usable in particular for the reinforcement of a finished rubber article, comprising one or more textile or metallic reinforcement yarns covered with a sheath comprising a thermoplastic polymeric composition, said sheathed yarn(s) being in turn embedded in a rubber composition referred to as coating rubber, characterised in that the coating rubber is a composition containing at least one diene rubber, silica as a main reinforcing filler and a sulphur vulcanisation system, wherein the ratio of the quantities, in phr (parts by weight for hundred parts by weight of elastomer), of sulphur and reinforcing filler is less than 0.08.

Description

technical field [0001] The present invention relates to the field of reinforced products (or reinforced semi-finished products) comprising metallic or textile reinforcing elements or "reinforcements" encased in a thermoplastic polymer composition, said encased The reinforcements are embedded in the rubber composition. These reinforced products or semi-finished products can be used in particular to reinforce composite semi-finished or finished products made of rubber, such as motor vehicle tyres. [0002] These reinforced products or reinforced semi-finished products can be used in particular in the carcass reinforcement, the crown of tyres, but also to protect the crown reinforcement (also called belt) of these tyres. Background technique [0003] In a known manner, a tire with radial carcass reinforcement comprises a tread, two inextensible beads, two sidewalls connecting the beads to the tread, and between the carcass reinforcement and the tread Between the circumferenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L7/00C08K13/02C08K5/47C08K3/36C08K5/09C08K3/22B60C9/20B60C1/00
CPCB60C1/00B60C9/20C08K3/36C08K5/47C08L9/00C08L7/00B60C2001/0066C08K3/22C08K3/04C08K3/06C08K5/098C08K5/39C08K5/40C08K5/44C08K5/5398C08K2003/2296C08K2201/019B60C1/0041C08J5/06C08J2300/26C08J5/00C08J2307/00C08J2477/06C08K13/06
Inventor A-L·蒂耶
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN