Liquid coagulant and tire puncture sealing material set

• US 9,676,979 B2
• Filed: 12/30/2015
• Issued: 06/13/2017
• Est. Priority Date: 05/27/2010
• Status: Active Grant

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Kimura, Kazushi, Okamatsu, Takahiro
• Primary Examiner(s): Cain, Edward
• Application Number:
  US14/984,669
• Publication Number:
  US 20160108299A1
• Time in Patent Office: 531 Days
• Field of Search: 523166
• CPC Class Codes: B29C 73/025 fed under pressure
• CPC Class Codes: B29C 73/163 Sealing compositions or agents, e.g. combined with propellant agents
• CPC Class Codes: B29K 2023/083 EVA, i.e. ethylene vinyl acetate copolymer
• CPC Class Codes: B29K 2105/04 cellular or porous
• CPC Class Codes: B29L 2030/00 Pneumatic or solid tyres or parts thereof conveyor belts B29L2031/7092; drive belts B29L2031/7094; fourdrinier belts B29L2031/733
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C09K 2200/0429 Alcohols, phenols, ethers
• CPC Class Codes: C09K 2200/0607 Rubber or rubber derivatives
• CPC Class Codes: C09K 2200/0622 Polyvinylalcohols, polyvinylacetates
• CPC Class Codes: C09K 3/1021 Polyurethanes or derivatives thereof

Abstract

Disclosed is a liquid coagulant which can be injected into the inside of a tire without the need of removing the tire from a rim and which can prevent the scattering of a residue of a tire puncture sealing material when the tire is removed from the rim. The liquid coagulant can coagulate an emulsion that contains natural rubber latex and/or a synthetic resin emulsion. The liquid coagulant contains a foaming agent capable of foaming the emulsion. Also disclosed is a tire puncture sealant set including the coagulant and a method of coagulating a tire puncture sealant.

Claims

1. A tire puncture sealant set, comprising:

a tire puncture sealant which contains a natural rubber latex,

a synthetic resin emulsion, and

an antifreezing agent; and

a liquid coagulant for coagulating the tire puncture sealant,

wherein the liquid coagulant includes a blowing agent for foaming the tire puncture sealant, and the blowing agent is one of a reactive blowing agent using a urethane resin and/or an acrylic resin having two or more carboxy groups and a hydrogencarbonate salt; and

a reactive blowing agent using a polyisocyanate compound.

2. The tire puncture sealant set according to claim 1, wherein the synthetic resin emulsion is at least one of an ethylene vinyl acetate emulsion, an acrylic emulsion, and a urethane emulsion.

3. The tire puncture sealant set according to claim 1, wherein the antifreezing agent is at least one of ethylene glycol, propylene glycol, diethylene glycol, glycerin, methanol, ethanol, and isopropyl alcohol.

4. The tire puncture sealant set according to claim 1, wherein the liquid coagulant further comprises an antifreezing agent.

5. The tire puncture sealant set according to claim 4, wherein the antifreezing agent is at least one of ethylene glycol, propylene glycol, diethylene glycol, glycerin, methanol, ethanol, and isopropyl alcohol.

6. A method of coagulating a tire puncture sealant remaining in a pneumatic tire, comprising the step of:

injecting a liquid coagulant into a punctured tire, in which the tire puncture sealant is remaining, without removing the tire from a rim,

wherein the tire puncture sealant includes a natural rubber latex, a synthetic resin emulsion and an antifreezing agent,

wherein the liquid coagulant includes a blowing agent for foaming the tire puncture sealant, and the blowing agent is one of a reactive blowing agent using a urethane resin and/or an acrylic resin having two or more carboxy groups and a hydrogencarbonate salt; and

a reactive blowing agent using a polyisocyanate compound, and

wherein the blowing agent causes in-situ coagulation of the tire puncture sealant, leaving no liquid components in the tire.