High productivity joint compounds
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United States of America Patent
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Apr 7, 1992
Grant Date -
N/A
app pub date -
Dec 12, 1990
filing date -
Dec 12, 1990
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Expired
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Abstract
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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