Tire puncture sealant

Patent metadata

Field	Value
Publication number	US-9254614-B2
Application number	US-201113207354-A
Country	US
Kind code	B2
Filing date	Aug 10, 2011
Priority date	Aug 11, 2010
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A tire puncture sealant including a rubber latex and/or a resin emulsion, and an acetylene alcohol and/or a derivative thereof.

First claim

What is claimed is:

1. A tire puncture sealant comprising a rubber latex and/or a resin emulsion, a compound expressed by the formula (1) below, a compound expressed by the formula (2) below, and an antifreezing agent:

wherein R 1 , R 2 , and R 3 are each independently an alkyl group having from 1 to 8 carbons; A 1 , A 2 , and A 3 are each independently an alkylene glycol group having from 2 to 3 carbons; and x, y, and z are each independently an integer from 0 to 60; and when x, y, and z are integers of not less than 2, the plurality of A 1 , A 2 , and A 3 , which correspond respectively, may each be the same or different.

2. The tire puncture sealant according to claim 1 , wherein in Formulas (1) and (2), R 1 , R 2 and R 3 are each independently an alkyl group having from 1 to 5 carbons.

3. The tire puncture sealant according to claim 1 , wherein a total of from 0.1 to 10 parts by mass of the acetylene alcohol and/or the derivative thereof is included per 100 parts by mass of a total solid content of the rubber latex and the resin emulsion.

4. The tire puncture sealant according to claim 1 , wherein the resin emulsion is an ethylene-vinyl acetate copolymer resin emulsion.

5. The tire puncture sealant according to claim 4 , wherein the rubber latex is a natural rubber latex, and a solid content compounding ratio, solid content mass of the natural rubber latex/solid content mass of the ethylene-vinyl acetate copolymer resin emulsion, of the natural rubber latex to the ethylene-vinyl acetate copolymer resin emulsion is from 70/30 to 20/80.

6. The tire puncture sealant according to claim 4 , wherein the ethylene-vinyl acetate copolymer resin emulsion is an ethylene-vinyl acetate-vinyl versatate copolymer resin emulsion.

7. The tire puncture sealant according to claim 1 , wherein the rubber latex comprises a deproteinized natural rubber latex.

8. The tire puncture sealant according to claim 1 , wherein the resin emulsion is an ethylene-vinyl acetate-vinyl versatate copolymer resin emulsion obtained by copolymerizing an ethylene monomer and a vinyl acetate monomer using a water soluble emulsification dispersant.

9. The tire puncture sealant according to claim 8 , wherein the emulsification dispersant is a polyvinyl alcohol.

10. The tire puncture sealant according to claim 8 , wherein a molar ratio of the ethylene monomer to the vinyl acetate monomer compounded at copolymerization is from 10/90 to 40/60.

11. The tire puncture sealant according to claim 8 , wherein a weight-average molecular weight of the ethylene-vinyl acetate copolymer resin in the ethylene-vinyl acetate copolymer resin emulsion is from 10,000 to 500,000, and a solid content of the ethylene-vinyl acetate copolymer resin emulsion is from 40 to 70 mass %.

12. The tire puncture sealant according to claim 8 , wherein a weight-average molecular weight of the ethylene-vinyl acetate copolymer resin in the ethylene-vinyl acetate copolymer resin emulsion is from 50,000 to 200,000, and a solid content of the ethylene-vinyl acetate copolymer resin emulsion is from 50 to 65 mass %.

13. The tire puncture sealant according to claim 1 ,
wherein R 1 , R 2 , and R 3 are each independently an alkyl group having from 1 to 3 carbons.

14. The tire puncture sealant according to claim 1 , wherein the tire puncture sealant includes from 1 to 3 parts by mass, of the acetylene alcohol and/or derivative thereof per 100 parts by mass of a total solid content of the rubber latex and/or the resin emulsion.

15. The tire puncture sealant according to claim 1 , comprising said antifreezing agent in an amount of from 100 to 150 parts by mass per 100 parts by mass of a total solid content of the rubber latex and/or the resin emulsion.

16. The tire puncture sealant according to claim 1 , further comprising:
a gelling agent in an amount of from 1.0 to 3.0 parts by mass per 100 parts by mass of a total solid content of the rubber latex and/or the resin emulsion; and
a surfactant containing a carbonyl group.

17. The tire puncture sealant according to claim 8 , wherein the tire puncture sealant comprises both the rubber latex and the resin emulsion, the rubber latex comprising a natural rubber latex and the resin emulsion comprising an ethylene-vinyl acetate copolymer resin emulsion, wherein a solid content compounding ratio of the natural rubber latex to the ethylene-vinyl acetate copolymer resin emulsion is in a range from 70/30 to 20/80.

18. The tire puncture sealant according to claim 17 , wherein the solid content compounding ratio of the natural rubber latex to the ethylene-vinyl acetate copolymer resin emulsion is in a range from 50/50 to 20/80.

19. The tire puncture sealant according to claim 1 , further comprising a tackifier selected from the group consisting of rosin resins, terpene resins, and hydrogenated terpene resins, wherein an amount of a solid content of the tackifier in the tire puncture sealant is from 10 to 30 parts by mass per 100 parts by mass of a total solid content of the rubber latex and/or the resin emulsion.

Assignees

• Takahara Hideyuki
• Yokohama Rubber Co Ltd

Inventors

• Takahara Hideyuki

Classifications

• B29C73/163 Primary

  Sealing compositions or agents, e.g. combined with propellant agents · CPC title