Fabric containing graft polymer thereon

• US 5,552,472 A
• Filed: 01/13/1995
• Issued: 09/03/1996
• Est. Priority Date: 01/30/1992
• Status: Expired due to Fees

• Current Assignee: Trelleborg Coated Systems US, Inc.
• Original Assignee: Trelleborg Coated Systems US, Inc.
• Inventors: Sanduja, Mohan L., Thottathil, Paul, Menzel, Jill, Kerr, Richard C., Damewood, John R.
• Primary Examiner(s): Bell, James J.
• Application Number:
  US08/372,733
• Time in Patent Office: 599 Days
• Field of Search: 524/500, 524/533, 524/523, 524/501, 525/14, 525/17, 525/454, 525/455, 525/309, 525/310
• US Class Current: 524/500
• CPC Class Codes: B60R 21/235 characterised by their material
• CPC Class Codes: D06M 14/14 Polyesters
• CPC Class Codes: D06M 14/16 Polyamides
• CPC Class Codes: D06M 15/564 Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/2481 including layer of mechanically interengaged strands, strand-portions or strand-like strips
• CPC Class Codes: Y10T 442/3976 Including strand which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous composition, water solubility, heat shrinkability, etc.]
• CPC Class Codes: Y10T 442/3984 Strand is other than glass and is heat or fire resistant

Abstract

A solution for forming a graft substrate containing a graft initiator, a catalyst for activating the graft initiator, a first component of water dispersable polymer and a second component of a monomer, each of which includes a functional group for reaction with an activated site on the substrate for grafting thereto and water. A method for grafting at least one of the components to a fiber, yarn or fabric substrate is also disclosed wherein increased flame retarding and yarn integrity is achieved while simultaneously allowing control of fabric porosity. This method does not significantly reduce fabric pliability as compared to uncoated fabric. Furthermore, the graft component may be selectively applied polymer to produce a preferred porosity range or a cutting pattern for the fabric substrate. A fabric, a portion of which includes a graft component or components thereon, forms another embodiment of the invention.

Claims

1. A solution for forming a grafted substrate comprising an aqueous solution that contains:

a graft initiator comprising a metal ion for activating sites on a substrate having active hydrogens;

a catalyst for activating the graft initiator;

a first component which includes a functional group for reaction with an activated site on the substrate for grafting the first component thereto and for forming an active site on the first component; and

a second component which includes a functional group for reacting with an activated site on the substrate or the first component and for forming an active site on the second components;

wherein the first and second components are grafted onto a substrate which includes an active hydrogen and is contacted by the aqueous solution to form a grafted substrate; and

one of the first and second components comprises a polymer which imparts increased integrity to the grafted substrate while the other component comprises a monomer which imparts increased flexibility or pliability to the grafted substrate.

2. The solution of claim 1 wherein the first component is a water dispersible polymer.

3. The solution of claim 1 wherein the water dispersible polymer is a polyurethane having sufficient soft segments to provide a predetermined pliability to the fabric substrate.

4. The solution of claim 1 wherein the water dispersible polymer is a polyurethane, thermoplastic, or a natural or synthetic elastomer.

5. The solution of claim 1 wherein the water dispersible polymer is an aliphatic or aromatic polyester polyurethane, polyvinyl chloride, or neoprene.

6. The solution of claim 1 wherein the second component is a water dispersible monomer having a molecular weight of about 1200 or less.

7. The solution of claim 1 wherein the second component is an acrylate or methacrylate compound.

8. The solution of claim 1 wherein the monomer is a diacrylate compound.

9. The solution of claim 1 wherein the solution includes at least one flame retardant agent to increase the flame retardancy of the fabric substrate.

10. The solution of claim 9 wherein the flame retardant agent is a cyclic phosphonate ester, a halogenated compound, a thiourea-formaldehyde compound, or mixtures thereof.

11. The solution of claim 1 wherein the solution includes an antioxidant, an antiozonant or a stabilizer to increase the heat or aging resistance of the fabric.