Stain resistant, water repellant, interpenetrating polymer network coating-treated textile fabric

• US 5,747,392 A
• Filed: 11/19/1996
• Issued: 05/05/1998
• Est. Priority Date: 11/19/1996
• Status: Expired due to Term

• Current Assignee: Hi-Tex Incorporated
• Original Assignee: Hi-Tex Incorporated
• Inventors: Frisch, Kurt C., Geng, Peng, Xiao, Han Xiong
• Primary Examiner(s): RAIMUND, CHRISTOPHER W
• Application Number:
  US08/752,429
• Time in Patent Office: 532 Days
• Field of Search: 442/64, 442/82, 442/94, 442/71, 442/124, 442/164, 442/168
• US Class Current: 442/82
• CPC Class Codes: D06N 3/0059 Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes D06N3/0065 takes precedence
• CPC Class Codes: D06N 3/042 Acrylic polymers D06N3/045 takes precedence
• CPC Class Codes: D06N 3/144 with polyurethane and polymerisation products, e.g. acrylics, PVC
• CPC Class Codes: Y10T 442/2098 At least two coatings or impregnations of different chemical composition
• CPC Class Codes: Y10T 442/2189 Fluorocarbon containing
• CPC Class Codes: Y10T 442/2287 Fluorocarbon containing
• CPC Class Codes: Y10T 442/2533 Inhibits mildew
• CPC Class Codes: Y10T 442/2861 Coated or impregnated synthetic organic fiber fabric
• CPC Class Codes: Y10T 442/2893 Coated or impregnated polyamide fiber fabric

Abstract

Water repellant, stain resistant, weatherable, and transfer printable coated fabrics are provided by coating synthetic woven textile fabric with an IPN (interpenetrating polymer network)--containing aqueous coating which is composed of both acrylic and polyurethane lattices also including a crosslinker. Upon elevated temperature cure, the coating forms an interpenetrating polymer network and provides a non-leather like fabric with the hand and feel of high quality woven fabric with the ability to transmit water vapor while being virtually totally water repellant.

Claims

1. A transfer-printable, water repellant and stain resistant synthetic textile fabric, comprising:

a) a synthetic textile fabric;

b) at least one fabric coating comprising, prior to drying on said fabric,

b)i) an aqueous urethane latex;

b)ii) an aqueous acrylic latex;

b)iii) a fluorochemical;

wherein the ratio of b)i) to b)ii) is from 90/10 to 10/90, and the ratio of b)i) and b)ii) to b)iii) is from about 1/99 to 45/55; and

b)iv) a cross-linking agent;

wherein the ratio of b)i), b)ii) and b)iii) to b)iv) is from about 99/1 to about 80/20.

2. The fabric of claim 1 wherein said coating prior to drying further comprises an effective amount of a biocide.

3. The fabric of claim 1 wherin said fabric comprises two coatings, a primer coating and a back coating applied to one side of said fabric only, said back coating containing a higher solids content and a lower fluorochemical content than said primer coating.

4. The fabric of claim 3 wherein said primer coating comprises, in weight percent based on solids, from 70-90% fluorochemical;

from 2-8% acrylic latex; and

from 2-8urethane latex.

5. The fabric of claim 4 wherein said back coating comprises, in weight percent based on solids, from 2-12% fluorochemical;

from 20-80% acrylic latex;

from 8-40% urethane latex; and

from 0.1 to 5 weight percent crosslinkers.

6. The fabric of claim 2, wherein said primer coating comprises about 80-90% fluorochemical;

from 4-8% acrylic latex; and

from 4-8% urethane latex; and

wherein said back coating comprises from 4-8% fluorochemical;

from 40-60% acrylic latex;

from 8-20% urethane latex and from 0.2 to 2% crosslinkers.

7. The fabric of claim 6 wherein said primer coating and said back coating each contain one or more biocides in a mildew-preventing effective amount.

8. The fabric of claim 7 wherein the amount of said primer coating when dry is from about 10 g to 20 g per square yard, and wherein said back coating, when dry, is from about 30 g to 45 g per square yard.

9. A transfer-printable, water repellant and stain resistant synthetic textile fabric, comprising:

a) a synthetic textile fabric;

having deposited thereon;

b) a primer coat comprising the dried residue of an aqueous primer coating comprising from 5 weight percent to about 40 weight percent primer solids based on the weight of said aqueous primer coating, said primer solids comprising from about 2 weight percent to about 20 weight percent based on solids of an acrylic latex;

from about 2 weight percent to about 20 weight percent based on solids of a polyurethane latex; and

from about 40 weight percent to about 90 weight percent based on solids of fluorochemical; and

optionally an effective amount of a crosslinker; and

c) a back coat comprising the dried residue of an aqueous back coating applied to one side of said synthetic textile fabric, said back coating comprising from about 30 weight percent to about 60 weight percent back coating solids based on the weight of said aqueous back coating, said back coating solids comprising from about 20 weight percent to about 80 weight percent based on back coating solids of an acrylic latex;

from about 8 weight percent to about 40 weight percent based on back coating solids of a urethane latex;

from about 2 weight percent to about 12 weight percent based on back coating solids of fluorochemical; and

from about 0.1 weight percent to about 5 weight percent based on back coating solids of crosslinker.

10. The fabric of claim 9, wherein said primer coating comprises about 80-90% fluorochemical;

from 4-8% acrylic latex; and

from 4-8% urethane latex; and

wherein said back coating comprises from 4-8% fluorochemical;

from 40-60% acrylic latex;

from 8-20% urethane latex and from 0.2 to 2% crosslinker.

11. The fabric of claim 9 wherein said primer coating and said back coating each contain one or more biocides in a mildew-preventing effective amount.

12. The fabric of claim 9 wherein the amount of said primer coating when dry is from about 10 g to 20 g per square yard, and wherein said back coating, when dry, is from about 30 g to 45 g per square yard.