CARPET COATING COMPOSITIONS OF IMPROVED STABILITY FORMED FROM VINYL ACETATE/ETHYLENE COPOLYMER DISPERSIONS

摘要

Disclosed are aqueous carpet-coating compositions suitable for use as binders or adhesives in carpet products. Such compositions, prior to being applied to carpet substrates and cured, comprise: A) a selected type of vinyl acetate/ethylene (VAE) copolymer dispersion which has been stabilized with emulsifiers and a cellulose ether-based protective colloid, and B) at least one carbon black based filler in the form of a dispersion/slurry with a solids content between 20 and 70%. These coating compositions exhibit especially desirable initial viscosity and viscosity stability characteristics. Carpet products which utilize such coating compositions to provide binder and/or adhesive layer within the carpet are also disclosed. Such carpet products can have desirable odor-controlling and odor-absorbing properties.

主权项

1. An aqueous carpet coating composition comprising:
A) an emulsifier- and protective colloid-stabilized vinyl acetate/ethylene copolymer dispersion wherein the vinyl acetate/ethylene copolymer therein comprises main co-monomers which include a vinyl acetate co-monomer copolymerized with ethylene and optionally copolymerized also with one or more additional different non-functional main co-monomer(s) based on vinyl esters of C1-C18 mono-carboxylic acids or C1-C18 esters of ethylenically unsaturated mono-carboxylic acids or C1-C18 diesters of ethylenically unsaturated di-carboxylic acids, said vinyl acetate/ethylene copolymer having a glass transition temperature, Tg, between about 0° C. to about 25° C.; and B) at least one carbon black based filler; wherein:
i) said carbon black based filler is a dispersion/slurry with a solids content between 20 and 70%;ii) said vinyl acetate/ethylene copolymer dispersion is stabilized with a protective colloid component comprising a cellulose ether or a derivative thereof; andiii) said coating composition has a Brookfield viscosity upon initial preparation of from about 500 mPa·s to 10.000 mPa·s and varies in Brookfield viscosity by no more than about 100% after storage for up to about 7 days at a temperature between about 20° C. and 30° C.