US 5,891,294 A · Stain blocking barrier layer

Abstract

The present invention is directed to a barrier layer which has the ability to substantially prevent the diffusion of stains, such as plasticizers and dyes or other chemicals, onto a surface of a surface covering, from a surface or object in which the surface covering is placed upon. The barrier layer contains a polyamide or polyurethane and is preferably located above a substrate or base layer in a surface covering. The barrier layer preferably is located between a UV topcoat layer and a vinyl wear layer. The present invention also relates to a method of preventing stain migration onto a surface covering from a surface on which the surface covering is placed by use of the barrier layer of the present invention and also relates to methods of making surface coverings containing the barrier layer of the present invention.

Claims2

Dependent claims

A method of providing a surface covering comprising the steps of:

(a) adhering to a resilient support surface and curing a barrier layer comprising a polyamide or polyurethane;
(b) providing a foam layer on top of and adhered to the barrier layer;
and
(c) providing a wear surface on top of and adhered to said foam layer, said wear surface including an initial wear layer and one or more additional wear layers on top of and adhered to said initial wear layer.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

08/876,432Filed 16 Jun 1997 · division

Priority

13 Sep 1996

Granted

6 Apr 1999

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

D06N 7/0044
Characterised by the physical or chemical aspects of the layers: sealing or barrier layers, e.g. against solvents, asphalt, plasticisers
D06N 3/06
With macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds: with polyvinylchloride or its…
D06N 3/08
With polyvinylchloride or its copolymerisation products: with a finishing layer consisting of polyacrylates, polyamides or polyurethanes or polyester
Y10T 428/162
Two dimensionally sectional layer: transparent or translucent layer or section

Stain blocking barrier layer

Life of this patent

Stain blocking barrier layer

Life of this patent

Abstract

Claims2