Rubber composition containing a modified elastomer, method for preparing same, and tire containing same

A rubber composition and a technology for the composition, applied in the field of tire manufacturing, can solve problems such as reduced rigidity

Active Publication Date: 2013-03-20
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

Conversely, if the bridging density decreases, the elongation at break increases, but the stiffness at moderate strains decreases

Method used

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  • Rubber composition containing a modified elastomer, method for preparing same, and tire containing same
  • Rubber composition containing a modified elastomer, method for preparing same, and tire containing same
  • Rubber composition containing a modified elastomer, method for preparing same, and tire containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0172] working example

[0173] I. Measurements and tests used

[0174] The elastomer and rubber compositions were characterized before and after curing as described below.

[0175] Determination of Modifier Ratio

[0176] The molar proportion of the grafted nitrile oxide compound was determined by NMR analysis. Spectra were collected on a Bruker 500 MHz spectrometer equipped with a 5 mm BBIz-class "broadband" probe. Quantitative 1 H NMR experiments used a single 30° pulse sequence with a repetition time of 3 s between each acquisition. Dissolve the sample in carbon disulfide (CS 2 )middle. To lock the signal, add 100 μl of deuterated cyclohexane (C 6 D. 12 ).

[0177] 1 H NMR spectroscopy enables the integration of CH 2 N and CH 2 The characteristic signal of the O proton quantifies the grafted nitrile oxide unit, the CH 2 N and CH 2 Characteristic signals of O protons appear at chemical shifts between δ = 3.1–3.8 ppm.

[0178] 2D HSQC 1 H- 13 C NMR spectr...

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Abstract

The invention relates to a rubber composition containing at least one diene elastomer, a reinforcing filler, a chemical cross-linking agent, and a modifying agent selected from among the compounds that include at least one group Q and at least one group A bonded together by at least one, and preferably only one, spacer group Sp, where: Q includes a dipole containing at least one, and preferably only one, nitrogen atom; A includes a combined group including at least one nitrogen atom; and Sp is an atom or a group of atoms forming a bond between Q and A. Said composition exhibits a trade-off between mean-deformation stiffness and elongation at break, as well as improved hysteresis properties, and is therefore particularly suitable for the manufacture of tires in order to improve the trade-off between rolling resistance and resistance to large deformations.

Description

technical field [0001] The invention relates to rubber compositions, especially for the manufacture of tyres, based on at least one diene elastomer, reinforcing fillers, chemical crosslinkers and at least one special modifier. Background technique [0002] In the field of tire manufacturing, and more particularly in the field of formulating rubber compositions known as ground-contacting treads, there is a continuous search for methods of improving the dispersion of fillers in polymers. One way to achieve this result is to use coupling agents that are able to establish an interaction between the polymer and the filler. [0003] Reagents for coupling polymers and fillers comprising nitrogen-containing dipoles are described in documents published under numbers US7186845B2 and JP2008208163. [0004] These documents describe nitrogen-containing dipole coupling agents which further comprise heterocyclic rings which themselves comprise nitrogen atoms and oxygen and / or sulfur atoms...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/28B60C1/00C08K5/34
CPCC08K5/548C08K5/3445C08L9/06C08C19/22C08C19/28C08K3/36B60C1/0016C08K5/32B60C1/00Y02T10/86C08L9/00C08K5/34
Inventor J·阿劳若达西尔瓦J-M·法夫罗A-F·萨利特N·西博特
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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