Carpet coating compositions

Patent metadata

Field	Value
Publication number	US-10480122-B2
Application number	US-201615564262-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 17, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

The invention relates to the use of mixtures that contain an aqueous dispersion of a vinyl acetate polymer and an aqueous dispersion of a vinyl acetate-ethylene copolymer for carpet coating compositions, and corresponding carpet coating compositions, as well as carpets which are coated with such carpet coating compositions.

First claim

What is claimed is:

1. A method of coating a carpet, comprising coating the carpet with a mixture comprising an aqueous dispersion of a vinyl acetate polymer and an aqueous dispersion of a vinyl acetate-ethylene copolymer.

2. The method as claimed in claim 1 , wherein the vinyl acetate polymer is obtained via free-radically initiated emulsion polymerization in an aqueous medium of 99 to 100 wt % of vinyl acetate and optionally up to 1 wt % of further comonomers, all based on the total weight of the monomers, while the particulars in weight % add up to 100 wt % in each case.

3. The method as claimed in claim 1 , wherein the vinyl acetate-ethylene copolymer is obtained via free-radically initiated emulsion polymerization in an aqueous medium of 65 to 98 wt % of vinyl acetate and 2 to 30 wt % of ethylene and optionally up to 10 wt % of further comonomers, all based on the total weight of the monomers, while the particulars in weight % add up to 100 wt % in each case.

4. The method as claimed in claim 1 , wherein the polymerization of the vinyl acetate polymer is effected in the presence of protective colloid, optionally in combination with emulsifier.

5. The method as claimed in claim 1 , wherein the polymerization of the vinyl acetate-ethylene copolymer is effected in the presence of protective colloid or in the presence of emulsifier or in the presence of a combination of emulsifier and protective colloid.

6. The method as claimed in claim 4 , wherein the polymerization of the vinyl acetate polymer and the polymerisation of the vinyl acetate-ethylene copolymer are each effected in the presence of partially hydrolyzed polyvinyl alcohol having an 80 to 95 mol % degree of hydrolysis and a Hoeppler viscosity in 4% aqueous solution of 1 to 40 mPas according to Hoeppler method at 20° C., DIN 53015.

7. The method as claimed in claim 1 , wherein the mixture comprises at least one aqueous dispersion of a vinyl acetate polymer and at least one aqueous dispersion of a vinyl acetate-ethylene copolymer at a weight fraction of 10 to 60 wt % of vinyl acetate polymer, both based on the total weight of vinyl acetate polymer and vinyl acetate-ethylene copolymer (dry/dry).

8. A carpet coating composition prepared from a mixture comprising an aqueous dispersion of a vinyl acetate polymer and an aqueous dispersion of a vinyl acetate-ethylene copolymer, and 100 to 1400 wt % of fillers, based on the weight of the mixture of vinyl acetate polymer and vinyl acetate-ethylene copolymer (dry/dry), and water, and optionally one or more additives and optionally one or more added substances, wherein the vinyl acetate-ethylene copolymer is obtained via free-radically initiated emulsion polymerization in an aqueous medium of 65 to 98 wt % of vinyl acetate and 2 to 30 wt % of ethylene and optionally up to 10 wt % of further comonomers, all based on the total weight of the monomers, and wherein the mixture of the aqueous dispersions and the filler has a Brookfield viscosity of <7000 mPas at a solids content of 75 to 85 wt % before the admixture of additives and added substances.

9. A carpet coated with one or more carpet coating compositions as claimed in claim 8 in a precoat and/or secondary coating.

Assignees

• Wacker Chemie Ag

Inventors

• Melchin Timo
• Künstle Holger
• Pfingstl Doris
• Tangelder Robert

Classifications

• D06N7/0081

  with at least one extra fibrous layer at the backing, e.g. stabilizing fibrous layer, fibrous secondary backing · CPC title

• D06N7/0086 Primary

  characterised by the cushion backing, e.g. foamed polyurethane · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C09D123/0853

  Vinylacetate · CPC title

• C08L31/04

  Homopolymers or copolymers of vinyl acetate · CPC title