The Yokohama Rubber Co., Ltd.

Kiyohito Takahashi

Takahiro Okamatsu

Provided is a sealant material composition that can ensure good sealing properties while suppressing a flow of a sealant during travel and that can provide such performance in a well-balanced, compatible manner. As a sealant material composition constituting a sealant layer () disposed in an inner surface of a pneumatic tire, a sealant material composition in which a proportion (A) of toluene insoluble occupying the sealant material composition is from 30 mass % to 60 mass % is used, or a sealant material composition in which a ratio (d1/d2) of measured specific gravity (d1) of the sealant material composition measured by an underwater replacement method to calculated specific gravity (d2) of the sealant material composition calculated from specific gravity and a blended amount of each raw material in the sealant material composition is from 0.7 to 0.9 is used.

Sealant material composition

As the sealant material composition forming a sealant layer of a pneumatic tire provided with the sealant layer on a tire inner surface, the sealant material composition prepared by blending from 0.1 parts by mass to 20 parts by mass of a crosslinking agent, from 0.1 parts by mass to 40 parts by mass of an organic peroxide, and from 10 parts by mass to 400 parts by mass of a liquid polymer per 100 parts by mass of a butyl rubber is used.

Sealant material composition and pneumatic tire

The present invention provides a tire puncture sealing agent having excellent storage performance, and a tire puncture repair kit. The tire puncture sealing agent of the present invention contains: a rubber latex and/or a resin emulsion; a predetermined glycol ether; and a non-ionic surfactant having an HLB value from 15 to 20.

Tire puncture sealing agent and tire puncture repair kit

The object of the present invention is to provide a tire puncture sealant having excellent sealing property, storage property, and injection property. The tire puncture sealant of the present invention contains a rubber latex and/or a resin emulsion and a cellulose fiber having a maximum fiber diameter of less than 1,000 nm, the cellulose fiber containing cellulose that optionally has a functional group.

Tire puncture sealant

The object of the present invention is to provide a tire sealant and tire repair kit having excellent injectability. The present invention is a tire sealant containing a natural rubber latex, a synthetic resin emulsion, an anti-freezing agent, and at least one type of substance selected from the group consisting of a compound A represented by the following formula (1) and an anti-desiccant, a content of the substance being 0.3 to 10 mass %; and a tire repair kit using the same.  In formula (1), Ris an amino group, a hydrogen atom, or a hydrocarbon group; and Rand Rare each independently a hydrocarbon group optionally comprising a heteroatom, or a hydrogen atom.

Tire sealant and tire repair kit

An object of the present invention is to provide a tire sealant having excellent injectability and a tire repair kit. The present invention relates to a tire sealant containing a natural rubber latex; a synthetic resin emulsion; an anti-freezing agent; and phosphate ions or acetate ions; wherein the content of the phosphate ions is from 4.5&#xd7;10to 11.0&#xd7;10mass %; the content of the acetate ions is from 0.05 to 0.2 mass %; and the relative dielectric constant of the tire sealant is not less than 52.9; and a tire repair kit using the tire sealant.

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Hiratsuka, Japan

Kiyohito Takahashi