Emulsion coagulant and tire puncture repair kit

Patent metadata

Field	Value
Publication number	US-9694549-B1
Application number	US-201515116921-A
Country	US
Kind code	B1
Filing date	Feb 13, 2015
Priority date	Feb 13, 2014
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

An object of the present invention is to provide an emulsion coagulant having excellent coagulation performance and a tire puncture repair kit that uses the emulsion coagulant. The emulsion coagulant of the present invention is an emulsion coagulant containing an α-starch and an anionic polyacrylamide; a molecular weight of the anionic polyacrylamide being from 500,000 to 2,000,000; and a mass ratio (WA:WB) of a content (WA) of the α-starch to a content (WB) of the anionic polyacrylamide being from 5:95 to 80:20.

First claim

The invention claimed is:

1. An emulsion coagulant comprising an α-starch and an anionic polyacrylamide;
a molecular weight of the anionic polyacrylamide being from 500,000 to 2,000,000; and
a mass ratio (W A :W B ) of a content (W A ) of the α-starch to a content (W B ) of the anionic polyacrylamide being from 5:95 to 80:20.

2. The emulsion coagulant according to claim 1 , wherein an anionic functional group of the anionic polyacrylamide is a carboxylate group; and
a ratio of repeating units having the carboxylate group to all repeating units in the anionic polyacrylamide is from 20 to 70 mol %.

3. The emulsion coagulant according to claim 1 further comprising aluminum sulfate;
wherein the content of aluminum sulfate is not less than 1.0 parts by mass per total of 10 parts by mass of the α-starch and the anionic polyacrylamide.

4. The emulsion coagulant according to claim 1 , wherein the emulsion coagulant is an emulsion coagulant for coagulating a tire puncture repair liquid containing a natural rubber latex, a synthetic resin emulsion, and an antifreezing agent.

5. The emulsion coagulant according to claim 4 , wherein the antifreezing agent is at least one type of compound selected from the group consisting of ethylene glycol, propylene glycol, and diethylene glycol.

6. A tire puncture repair kit comprising the emulsion coagulant described in claim 1 and a tire puncture repair liquid.

7. The emulsion coagulant according to claim 2 further comprising aluminum sulfate;
wherein the content of aluminum sulfate is not less than 1.0 parts by mass per total of 10 parts by mass of the α-starch and the anionic polyacrylamide.

8. A tire puncture repair kit comprising the emulsion coagulant described in claim 2 and a tire puncture repair liquid.

9. A tire puncture repair kit comprising the emulsion coagulant described in claim 7 and a tire puncture repair liquid.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Okamatsu Takahiro
• Naruse Masahiro
• Takahara Hideyuki

Classifications

• B29K2077/00

  Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material · CPC title

• C08L7/02

  Latex · CPC title

• C08L3/02

  Starch; Degradation products thereof, e.g. dextrin · CPC title

• C08C1/15

  characterised by the coagulants used · CPC title

• C08K5/053

  Polyhydroxylic alcohols · CPC title