Patent ID: 9683094
Date: 2017-06-20
CPC Classifications: C04B,C08L

Claim:
1. An aqueous tape joint compound comprising: an inorganic filler; from 0.5 to 4% by weight as solid polymer based on the weight of said aqueous joint compound of an emulsion polymer binder; cellulose ether thickener; water; and from 0.01 to 1.3% by weight based on the weight of said aqueous joint compound, water-soluble polymer or salts thereof, said water-soluble polymer selected from the group consisting of (a) polymer consisting essentially of, as polymerized units, from 50% to 100%, by weight based on the weight of said polymer, acrylic acid, and from 0% to 50%, by weight based on the weight of said polymer, second monoethylenically unsaturated acid monomer, (b) diisobutylene-maleic anhydride polymer, and (c) mixtures thereof; said water-soluble polymer having a weight average molecular weight of from 1500 to 75,000 and a calculated Tg of from 80° C. to 250° C.; and wherein said aqueous tape joint compound is substantially free from calcium sulfate hemihydrate.