| abstract |
Polymers are described comprising a) one or more of the recurring structural units of the formula (1) n n n n n n n n n n where R 1 is hydrogen, methyl or ethyl and A is C 1 -C 8 alkylene, and Q + is H + , NH 4 + , Li + , Na + , K + , ½ Ca ++ , ½ Mg ++ , ½ Zn ++ or ⅓ Al +++ , and the neutralization degree of the structural units of formula (1) is 50 to 100 mol-%, and b) one or more of the recurring structural units of the formula (2) n n n n n n n n n n where R 1 and A are R 1 and A from formula (1) and X + is [HNR 5 R 6 R 7 ] + , where R 5 , R 6 and R 7 can independently from each other be hydrogen, a linear or branched alkyl group with 1 to 22 carbon atoms, a linear or branched, simple or polyunsaturated alkenylene group with 2 to 22 carbon atoms, a C 6 -C 22 -alkylamidopropyl group, a linear monohydroxyalkyl group with 2 to 10 carbon atoms or a linear or branched dihydroxyalkyl group with 3 to 10 carbon atoms, and wherein at least one of the groups R 5 , R 6 and R 7 is not hydrogen, with the proviso that the molar ratio of the structural units of formula (1), where Q + is NH 4 + , Li + , Na + , K + , Ca ++ , Mg ++ , Zn ++ or Al +++ , to the structural units of formula (2) is 97:3 to 55:45 and the formation concentration (CMC)<15 g/1 and c) of 0 to 8, preferably 0.01 to 5 wt.-% of cross-linking structural units, obtained from monomers with at least two olefinic double bonds. The polymers are suitable, for example, in an advantageous way as thickeners in cosmetic, dermatologic and pharmaceutical compositions. |