POLYMERIC THICKENERS FOR AQUEOUS COMPOSITIONS

摘要

Latexes are thicknened by a blend of a urethane compound effective as an associative thickener and a non-urethane compound of the formula: R<1>-(O-A)a-B<1>-R<2>-(B<2>-R<3>)d-(B<3>-(A'-O)b-f-(A'-B<4>)f-R<4>-(B<5>-R<5>)e)n-B<6>-(A"O)c-R<6>, wherein R<1> and R<6> are monovalent hydrophobic groups independently selected from the group consisting of an aliphatic group, a substituted aliphatic group, an aromatic group, and a substituted aromatic group; R<2> and R<4> are independently selected from the group consisting of aliphatic, substituted aliphatic, aromatic, or substituted aromatic radicals, each radical being divalent or trivalent; R<3> and R<5> are independently selected from hydrogen, lower alkyl and lower aralkyl; B<1>, B<2>, B<3>, B<4>, B<5> and B<6> are linking groups independently selected from the group consisting of an oxygen atom (to form the ether linkage -O-), a carboxylated group (to form an ester linkage R<2>-C(O)-O- and/or R<4>-C(O)-O-, an amino group to form the amine linkage R<2>-N(R)- and/or R<4>-N(R)-, wherein R is hydrogen, lower alkyl, lower aralky, or lower acyl), and an amido group (to form the amide linkage R<2>-N(R)-C(O)- and or R<4>-N(R)-C(O)-, wherein R is hydrogen, lower alkyl, lower aralkyl, or lower acyl); each of a, b, c, d, e, f and n are integers, wherein each of a and c are independently any integer from greater than 20 to about 200; b is any integer from greater than 20 to about 450; d, e, and f are zero or 1; and n is any integer from 1 to about 5; and each of A, A' and A'' is independently an ethylene, 1,2-propylene, 1,2-butylene unit or combinations thereof.