Aqueous polyelectrolyte complex as one pot nanocoating solution to impart antiflammable behavior to various substrates

Patent metadata

Field	Value
Publication number	US-9840629-B2
Application number	US-201415034732-A
Country	US
Kind code	B2
Filing date	Nov 5, 2014
Priority date	Nov 5, 2013
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A method includes coating a substrate to provide a flame resistant substrate. In an embodiment, the method includes preparing a solution. The solution includes an anionic material, a cationic material, and water. The method further includes exposing the substrate to the solution to produce a coating on the substrate. The coating has cationic material and anionic material.

First claim

What is claimed is:

1. A method for coating a substrate to provide a flame resistant substrate, comprising:
(A) exposing the substrate to a solution with a pH of about 2;
(B) preparing a polysodium phosphate solution and adjusting a pH of the polysodium phosphate solution to about 7 to about 14;
(C) preparing a polyethyleneimine solution and adjusting a pH of the polyethylenimine solution to about 7 to about 14;
(D) preparing an aqueous solution, wherein the aqueous solution comprises:
the polysodium phosphate solution and the polyethyleneimine solution; and
water; and

(E) exposing the substrate to the aqueous solution to produce a coating on the substrate, wherein the coating comprises polysodium phosphate and polyethyleneimine;
wherein the coating is of a thickness such that the substrate is self-extinguishing during a vertical flame test.

2. The method of claim 1 , wherein the polyethyleneimine solution comprises from about 0.01 wt. % branched polyethyleneimine to about 30.0 wt. % branched polyethyleneimine.

3. The method of claim 1 , wherein the polysodium phosphate solution comprises from about 0.01 wt. % polysodium phosphate to about 30.0 wt. % polysodium phosphate.

4. The method of claim 1 , wherein the substrate is exposed to the aqueous solution from about 1 second to about 1 hour.

5. The method of claim 1 , wherein the coated substrate has between about 5.0 wt. % coating and about 25 wt. % coating.

6. The method of claim 1 , wherein the coating is between about 10 nanometers and about 1,000 nanometers thick.

7. The method of claim 1 , wherein the substrate comprises foam, fabric, leather, vinyl compounds, plastic, glass, ceramic, metal, wood, carpet, hook and loop fasteners, non-foam padding, lapis, ducts, or any combinations thereof.

8. The method of claim 7 , wherein the coating further comprises an additive.

9. The method of claim 8 , wherein the additive comprises a crosslinker.

10. The method of claim 9 , wherein the crosslinker comprises a bromoalkane, an aldehyde, a carbodiimide, an amine active ester, an acrylate, an epoxide, or any combinations thereof.

Assignees

• Texas A & M Univ Sys

Inventors

• Grunlan Jaime C

Classifications

• D06B19/0064

  by a fixing bath (D06B19/0082 takes precedence) · CPC title

• C09D5/18 Primary

  Fireproof paints {including high temperature resistant paints} · CPC title

• C09D179/02

  Polyamines · CPC title