# US 6,294,486 B1 · Formaldehyde-free adhension promoter composition for waistband fabric

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 6,294,486 B1
- Document ID: US6294486B1
- Status: Granted
- Kind: B1
- Application number: 09/395,033
- Filed: 1999-09-13
- Granted: 2001-09-25
- Earliest claimed: 1999-09-13
- Assignees: Milliken & Company
- Inventors: Roy Phillip DeMott
- Web page: https://patentgrep.com/patent/US6294486B1

## CPC

- C08J 5/10: characterised by the additives used in the polymer mixture
- D06N 3/10: with styrene-butadiene copolymerisation products {or other synthetic rubbers or elastomers except polyurethanes}
- C08J 2321/00: Characterised by the use of unspecified rubbers
- Y10T 428/24994: Fiber embedded in or on the surface of a polymeric matrix
- Y10T 428/2976: Longitudinally varying
- Y10T 442/2213: Coating or impregnation is specified as weather proof, water vapor resistant, or moisture resistant
- Y10T 442/2221: Coating or impregnation is specified as water proof
- Y10T 442/2893: Coated or impregnated polyamide fiber fabric
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- D06N: WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

This invention relates to adhesion promotion compositions which provide excellent adhesive characteristics between rubber latices and flexible textile substrates. Such compositions comprise specific mixtures of capped isocyanates which react strongly and thoroughly with rubber latices to promote the adhesion of such latices to textile substrates. Such rubber latices provide the ability to increase the stretch characteristics of the target textile substrate while simultaneously permitting retention of a certain degree of rigidity. Such rubber/textile composites are useful within waistbands as they retain their stretch and rigidity very well even after repeated dry cleanings. The inventive adhesion promoter does not require the utilization of formaldehyde, reduces the amount of promoter needed to effectuate the proper adhesive characteristics, and substantially eliminates potential discolorations and swelling of the target textile substrate associated with standard formaldehyde-containing adhesion promoter compositions. The methods utilizing these particular adhesion promotion compositions as well as the target textile substrates themselves are also contemplated within this invention.

## Claims

### Claim 1

A textile/rubber latex composite comprising a rubber latex and a textile fabric, wherein said rubber latex and said textile fabric are adhered together through the utilization of a formaldehyde-free adhesion promoter composition comprising at least one capped isocyanate compound.

### Claim 2 (depends on 1)

The composite of claim 1 wherein said capped isocyanate is a capped diisocyanate.

### Claim 3 (depends on 1)

The composite of claim 1 wherein said rubber latex is a carboxylated nitrile rubber latex.

### Claim 4 (depends on 1)

The composite of claim 1 wherein said textile fabric is selected from the group consisting of polyester, polyamide, and blends thereof.

### Claim 5 (depends on 4)

The composite of claim 4 wherein said textile fabric is polyester.

### Claim 6

A method of producing a textile/rubber composite comprising the steps of
(a) providing a rubber latex composition;
(b) introducing an adhesion promoter composition into said rubber latex composition of step “a” wherein said adhesion promoter composition is free from formaldehyde and comprises at least one isocyanate compound;
(c) applying the resultant composition of step “b” to a textile fabric substrate; and
(d) curing the resultant textile/rubber latex/adhesion promoter composite at temperature of between about 125 and 320° C.

### Claim 7 (depends on 6)

The method of claim 6 wherein
the said isocyanate is a diisocyanate.

### Claim 8 (depends on 6)

The method of claim 6 wherein
said rubber latex is a carboxylated nitrile rubber latex.

### Claim 9 (depends on 6)

The method of claim 6 wherein
said textile substrate is selected from the group consisting of polyester, polyamide, and blends thereof.

### Claim 10 (depends on 9)

The method of claim 9 wherein
the textile substrate is polyester.

### Claim 11 (depends on 6)

The method of claim 6 wherein said curing temperature in step “d” is from about 320 to about 400° C.

### Claim 12 (depends on 11)

The method of claim 11 wherein said curing temperature in step “d” is from about 330 to about 395° C.