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Rubber compounds with high oxygen impermeability for tire components

By using a cross-linkable polymer base of halobutyl rubber and natural rubber in the tire component compound, combined with a pre-treated layered structural reinforcing filler and vulcanization system, the unevenness caused by the polymer base mixture is solved Dispersion problem, achieving high oxygen impermeability and improvement of physical properties, suitable for manufacturing efficient and lightweight tire inner liner.

Inactive Publication Date: 2020-09-04
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been determined experimentally that the use of a polymer base mixture leads to an uneven dispersion of the ingredients of the compound, which has consequences in terms of physical properties known to those skilled in the art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Five compounds according to the invention (A-E) and five control compounds (Cont. 1-Cont. 5) were produced. The five compounds according to the invention are distinguished from each other on the basis of the composition of the polymer base and the amount of fatty acid used to pretreat the reinforcing filler with a lamellar structure.

[0023] The five control compounds are compounds in which there is no reinforcing filler with a lamellar structure pretreated with fatty acid (Cont. Pretreated compounds with layered structure of reinforcing fillers (Cont. 4 and Cont. 5).

[0024] The preparation method of the compounding material described in the Example is shown below. This method is not a limitation of the invention.

[0025] -Using fatty acids to pre-treat reinforcing fillers with a layered structure-

[0026] The clay was mixed with stearic acid in an amount according to the proportions indicated in the compositions in Tables I and II.

[0027] The obtained mixtur...

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PUM

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Abstract

A compound for the preparation of tire components comprising a polymer base having crosslinkable unsaturated chains comprising at least one halobutyl rubber, a reinforcing filler, a vulcanization system and a pretreated with a treating agent A reinforcing filler having a layered structure, the treating agent is included in the group consisting of fatty acids, resin acids, fatty acid salts and fatty acid esters.

Description

technical field [0001] The present invention relates to rubber compounds having high oxygen barrier properties for tire components. Background technique [0002] When manufacturing tyres, it is necessary to produce components characterized by a high impermeability to oxygen. [0003] One of these components is the airtight layer, which consists of an inner layer of rubber used in tubeless tires, ie those without an inner tube, to ensure that the air contained in the carcass remains pressurized. The inner liner must also ensure that the oxygen remains confined within the carcass as much as possible and does not diffuse to other components of the tire causing its deterioration. [0004] In order to obtain tires with increasingly higher rolling resistances, it is necessary, without this compromising their performance in terms of impermeability, to produce innerliners of ever decreasing thickness. In fact, a thinner innerliner necessarily means a smaller amount of material use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08L7/00C08K9/04C08K7/00C08K3/34C08K3/04
CPCC08L23/283C08L7/00C08K9/04C08K7/00C08K3/34C08K3/346C08K3/04
Owner BRIDGESTONE CORP