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Tire comprising rubber composition comprising vinyl epoxy elastomer crosslinked by polycarboxylic acid

A rubber composition, polycarboxylic acid technology, applied in special tires, tire parts, transportation and packaging, etc., can solve problems such as affecting rolling resistance properties

Active Publication Date: 2017-04-05
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this stiffening of the tread adversely affects the rolling resistance properties in a known manner by a concomitant increase in the hysteresis losses of the rubber composition

Method used

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  • Tire comprising rubber composition comprising vinyl epoxy elastomer crosslinked by polycarboxylic acid
  • Tire comprising rubber composition comprising vinyl epoxy elastomer crosslinked by polycarboxylic acid
  • Tire comprising rubber composition comprising vinyl epoxy elastomer crosslinked by polycarboxylic acid

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0130] II.5. Preparation of rubber compositions

[0131] The composition for use in the tires of the invention can be manufactured in suitable mixers using two successive stages of preparation well known to those skilled in the art: at elevated temperatures (up to between 100°C and 190°C, preferably between 120°C and The first stage of thermomechanical processing or kneading ("non-production" stage) at a maximum temperature between 180°C), followed by a lower temperature (usually less than 100°C, for example between 40°C and 100°C) In the second stage of mechanical processing ("preparation" stage), the crosslinking system can be introduced during said refining stage. A person skilled in the art will know how to adjust the temperature in the mixer according to the nature of the epoxidized ethylene elastomer.

[0132] As the case may be, for the practice of the invention, the crosslinking system is either introduced into the internal mixer together with all other components o...

Embodiment 1

[0148]This test illustrates a rubber composition particularly useful as the tread of the tire of the invention. These compositions exhibit ease of preparation and simplicity over conventional rubber compositions (sulfur-cured), and also improve the stiffness-hysteresis trade-off of the composition compared to sulfur-cured compositions.

[0149] For this purpose, rubber compositions were prepared as indicated above, some according to the invention (C4) and some not according to the invention (comparisons C1 to C3), as shown in Table 1 .

[0150] Compositions C1 to C3 are vulcanized compositions (that is, crosslinked by sulfur-based vulcanization systems conventionally used for tire curing) with different elastomeric properties and filler contents, while composition C4 is composed of Polyacids and imidazoles are crosslinked.

[0151] Table 1

[0152] C1 C2 C3 C4 SBR(1) 100 100 h-SBR(2) 100 EPOXPE(3) 100 Silica (4) 90 11...

Embodiment 2

[0173] This test also illustrates rubber compositions that are particularly useful as treads for tires of the invention. These compositions exhibit ease of manufacture and simplicity over conventional rubber compositions (sulfur vulcanized) and simultaneously improve the hysteresis of the composition compared to sulfur vulcanized compositions.

[0174] For this purpose, rubber compositions were prepared as indicated above, some according to the invention (C7) and some not according to the invention (compare C5 and C6), as shown in Table 3.

[0175] Compositions C5 and C6 are compositions based on epoxy-functional but predominantly diene elastomers crosslinked using sulfur (conventional for tire curing) or using the polyacid / imidazole crosslinking system proposed in the present invention , whereas composition C7 is based on an epoxidized olefinic matrix crosslinked by polybasic acids and imidazoles according to the invention.

[0176] table 3

[0177] C5 C6 C7 ...

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Abstract

The invention relates to a tire comprising a rubber composition based on at least one epoxy-functional vinyl elastomer as main elastomer, at least one reinforcing filler and a crosslinking system, the crosslinking The system comprises polycarboxylic acids of general formula (I) and imidazoles of general formula (II), in general formula (I), A represents a covalent bond or a hydrocarbon group comprising at least 1 carbon atom, and the hydrocarbon group is optionally Substituted and optionally interrupted by one or more heteroatoms, in general formula (II), R1 represents a hydrocarbon group or a hydrogen atom, R2 represents a hydrocarbon group, R3 and R4 each independently represent a hydrogen atom or a hydrocarbon group, or R3 and R4 are combined with The carbon atoms of the imidazole ring to which they are attached together form a ring.

Description

technical field [0001] The present invention relates to tires having a rubber composition, in particular a tire having a rubber composition based on an ethylenic elastomer containing epoxy functional groups. Background technique [0002] For tire manufacturers, finding solutions to improve tire durability is an ongoing goal; in particular, it is desirable to produce tires that are stable over time despite repeated mechanical and thermal stresses over the life of the tire. Properties of rubber mixture. In particular, it is important for the composition of various semi-finished products (such as treads, etc.) participating in the tire composition to exhibit excellent thermal oxidation resistance capable of modifying its performance as the tire is used. [0003] Furthermore, today the need to save fuel and protect the environment has become a priority, so it is desirable to prepare mixtures with good wear properties and at the same time as low a hysteresis as possible, so that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C1/00C08K5/3445
CPCB60C1/0016C08K5/092C08K5/3445C08L15/00C08L63/08C08K3/36
Inventor B·施内尔E·弗勒里
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN