High performance sealant composition for tire repair

Patent metadata

Field	Value
Publication number	US-2016168431-A1
Application number	US-201514942868-A
Country	US
Kind code	A1
Filing date	Nov 16, 2015
Priority date	Dec 12, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A high performance sealant for repairing punctures in tires includes a highly filtered natural rubber latex, an ultra-fine inorganic powder, a polyamide suspension, and an antifreeze agent that includes water and at least one of ethylene glycol and propylene glycol. The high performance sealant can readily pass through a valve stem of a tire without removing the core and seal, and provides a strong and durable sealing of the puncture.

First claim

We claim:

1 . A high performance sealant, comprising:
a natural rubber latex; an inorganic powder; a polyamide suspension; and an antifreeze agent including water and at least one of ethylene glycol and propylene glycol.

2 . The high performance sealant of claim 1 , wherein the natural rubber latex is filtered to remove coagulants.

3 . The high performance sealant of claim 1 , wherein the natural rubber latex has an average particle size of about 400 microns or less.

4 . The high performance sealant of claim 1 , wherein the inorganic powder has an average particle size of about 150 nanometers or less.

5 . The high performance sealant of claim 4 , wherein the inorganic powder comprises calcium carbonate having an average particle size of about 100 nanometers or less.

6 . The high performance sealant of claim 1 , wherein the natural rubber latex comprises natural rubber and ammonia.

7 . The high performance sealant of claim 1 , comprising:
about 20-50% by weight of the natural rubber latex; about 0.25-10.0% by weight of the inorganic powder; about 0.10-5.0% by weight of the polyamide suspension; and about 30-70% by weight of the antifreeze agent.

8 . The high performance sealant of claim 1 , wherein the antifreeze agent comprises about 30-70% by weight ethylene glycol, about 10-50% by weight propylene glycol, and about 10-30% by weight water.

9 . The high performance sealant of claim 1 , further comprising a synthetic rubber latex.

10 . The high performance sealant of claim 7 , further comprising about 2-10% by weight of a synthetic latex rubber.

11 . The high performance sealant of claim 1 , further comprising a tackifier.

12 . The high performance sealant of claim 7 , further comprising about 3-15% by weight of a tackifier.

13 . A high performance sealant, comprising:
about 20-50% by weight of a natural rubber latex having an average particle size of about 400 microns or less; about 0.25-10% by weight of an inorganic powder having an average particle size of about 150 microns or less; about 0.10-5.0% by weight of a polyamide suspension; and about 30-70% by weight of an antifreeze agent including water and at least one of ethylene glycol and propylene glycol.

14 . The high performance sealant of claim 13 , wherein the polyamide suspension comprises polyamide suspended in water.

15 . The high performance sealant of claim 13 , comprising:
about 30-40% by weight of the natural rubber latex; about 0.5-2.5% by weight of the inorganic powder; about 0.2-1.2% by weight of the polyamide suspension; and about 40-60% by weight of the antifreeze agent.

16 . The high performance sealant of claim 15 , further comprising about 3-8% by weight of a synthetic latex rubber.

17 . The high performance sealant of claim 15 , further comprising about 5-10% by weight of a tackifier.

18 . The high performance sealant of claim 13 , wherein the antifreeze agent comprises about 40-60% by weight ethylene glycol, about 20-40% propylene glycol, and about 10-30% by weight water.

19 . A high performance sealant, comprising:
about 20-50% by weight of a filtered natural rubber latex having an average particle size of about 400 microns or less; about 2-10% by weight of a synthetic latex; about 0.25-10% by weight of an inorganic powder having an average particle size of about 100 microns or less; about 0.10-0.50% by weight of an aqueous polyamide suspension; about 3-15% by weight of a tackifier; and about 30-70% by weight of an antifreeze agent including ethylene glycol, propylene glycol and water.

20 . The high performance sealant of claim 19 , wherein the aqueous polyamide suspension is combined with aqueous colloidal silica.

Assignees

• Illinois Tool Works

Inventors

• Spindler Martin Patrick
• Sulemanji Shees N
• Klemm Henry Friedrich Ferdinand
• Haener Brandt A
• Smith Bryan Douglas
• Chetosky Gordon

Classifications

• B29C73/163

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

• C08K3/01

  characterized by their specific function · CPC title

• C08K5/0008

  Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59 · CPC title

• C08K3/26

  Carbonates; Bicarbonates · CPC title

• C09J107/02 Primary

  Latex · CPC title