| abstract |
1395762 Sizing cellulose yarns ROHM & HAAS CO 14 April 1972 [16 April 1971] 17367/72 Heading DIP [Also in Divisions C2 and C3] Polymers of sulphocarboxylic compounds of formula: or salts thereof wherein R is hydrogen or (C 1-4 ) alkyl, A is an alkylene group having 2 to 10 carbon atoms, at least 2 of which extend in a chain between the adjoined oxygen atoms, and X is either (1) an aromatic nucleus, such as a benzene or naphthalene ring, substituted by a sulfonic acid group and optionally one or more additional sulfonic acid or carboxylic acid groups, or (2) a substituted alkyl group of the formula: wherein one of R<SP>1</SP> and R<SP>3</SP> is a sulfonic acid group and the other is H, R<SP>2</SP> is H or a (C 1 -C 4 ) alkyl group, R<SP>4</SP> is H, -COOH, or a (C 1 -C 4 ) alkyl group, and R<SP>5</SP> is H or a (C 1 -C 4 ) alkyl group with the proviso that only one of R<SP>2</SP>, R<SP>4</SP> and R<SP>5</SP> is alkyl except that both R<SP>2</SP> and R<SP>4</SP> may be alkyl provided, in that case, R<SP>1</SP> and R<SP>5</SP> are both H are used to size cotton and viscose yarns in organic solvents. The size may be removed by an alkaline bath. |