High productivity joint compounds

Details High productivity joint compounds High productivity joint compounds

C - Chemistry, Metallurgy

09

K

C09K 3/10 (2006.01) C08L 1/28 (2006.01) C09J 101/02 (2006.01)

Patent

CA 2055261

Water demand in an aqueous joint compound composition is increased by incorporating a blend of water soluble polymer (WSP) and crosslinked polyacrylic acid water demand polymer (WDP) with a WSP to WDP blend ratio of 9:1 to 25:1. A preferred WSP is hydrophobically modified hydroxyethylcellulose. This blend may also be used for aqueous tile adhesives. In the joint compound the thickener. comprising water-soluble cellulose ether(s) and water-insoluble but swellable polyacrylic acid or salt thereof, the acrylic component gives increased joint compound viscosity without the need to decrease water level or increase thickener level.

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