| 摘要 |
<p>TAPE JOINT CEMENT COMPOSITION Tape joint cement compositions suitable for use with wallboard are disclosed wherein at least one hydroxypropylhydroxyethylcellulose having specified substitution levels is employed as the water retention aid and thickener. Blends of hydroxypropylhydroxyethylcellulose with a) at least one cellulose ether, such as, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, methylhydroxyethylcellulose, and methylhydroxypropylcellulose or b) a hydroxyalkylguar, such as hydroxypropylguar and hydroxyethylguar are also disclosed.</p> |
