Patent ID: 6172166
Filing Date: 2001-01-09
Classification: C08F,C08G,C08L

Abstract:
A polystyrene compound having an acid group and being represented by the following formula (1) wherein the acid group is neutralized with a neutralization amount of basic metal compound effective to neutralize the acid group, the basic metal compound containing a metal selected from the group consisting of Al, Ga, In, Tl, Ge, Sn, Pg, Sb and Bi; ##STR4##wherein R.sup.1 is hydrogen atom or methyl group; X is an acid group selected from the group consisting of PO(OH).sub.2 and OPO(OH).sub.2 ; and ""n"" is a polymerization degree, the polystyrene compound having a weight average molecular weight of from about 50,000 to about 400,000 and comprising from about 2 to about 15 mol % of the acid functional group.