Sealant material composition and pneumatic tire

A material composition and pneumatic tire technology, applied in the field of pneumatic tires and sealant material compositions, can solve problems such as reduced sealing performance, adverse effects on handling stability and other driving performance, and achieve suppressed sealing performance, good processability, and improved The effect of processability

Active Publication Date: 2020-10-30
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the aforementioned self-sealing pneumatic tire, when the viscosity of the sealant is lowered, the sealant easily flows into the through hole, so the sealing performance is improved. As a result, the flow on the center side may adversely affect driving performance such as handling stability
On the other hand, when the viscosity of the sealant is increased in order to prevent the flow of the sealant, the sealing performance is reduced

Method used

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  • Sealant material composition and pneumatic tire
  • Sealant material composition and pneumatic tire
  • Sealant material composition and pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Made in tire size 215 / 60R16, with figure 1 In the shown basic structure, in a pneumatic tire having a sealant layer on the inside of the inner liner at the tread portion in the tire radial direction, the composition of the sealant material composition constituting the sealant layer, whether or not the inner liner contains a halogenated butyl group The thickness of the rubber, the sealant layer, the distance from the center position of the sealant layer to the tire equator, and the position of the end of the sealant layer were adjusted as shown in Tables 1 to 3 of Comparative Examples 1 to 10 and Examples 1 to 14 tire.

[0043] In addition, in all the examples in Tables 1 to 3, the inner liner was composed of halogenated butyl rubber.

[0044] With regard to these test tires, adhesiveness, sealability, fluidity of the sealant, and low rolling performance were evaluated by the following test methods, and the results are shown in Tables 1 to 3 together.

[0045] Adhesive...

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Abstract

Provided are: a sealant material composition that makes it possible to ensure favorable sealing properties and suppress travel-associated flowage of a sealant; and a pneumatic tire. The sealant material composition that is for forming a sealant layer on a tire inside surface of a pneumatic tire includes, per 100 parts by mass of a halogenated butyl rubber, 1-40 parts by mass of a crosslinking aidand 50-400 parts by mass of a liquid isobutylene-isoprene copolymer that has a molecular weight of 10,000-60,000.

Description

technical field [0001] The present invention relates to a sealant material composition constituting a sealant layer of a self-sealing pneumatic tire having a sealant layer on the inner surface of the tire, and a pneumatic tire using the sealant material composition. Background technique [0002] In pneumatic tires, it has been proposed to provide a sealant layer on the tire radial inner side of the inner liner at the tread portion (for example, refer to Patent Document 1). In such a pneumatic tire, when a foreign object such as a nail gets stuck in the tread portion, the sealant flows into the through hole, thereby suppressing a decrease in air pressure and maintaining running. [0003] In the aforementioned self-sealing pneumatic tire, when the viscosity of the sealant is lowered, the sealant easily flows into the through hole, so the sealing performance is improved. The flow on the center side may, as a result, adversely affect running performance such as steering stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10B60C19/12
CPCB29C73/163B29C73/18C08L23/283C08L23/22C08L2207/324B60C19/122C08K5/14C08K5/0025C08L23/28C08L2207/04
Inventor 高桥清人
Owner THE YOKOHAMA RUBBER CO LTD
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