Patent ID: 6174626
Filing Date: 2001-01-16
Classification: H01B,H01M,Y02E

Abstract:
A polyelectrolyte comprising a (meth)acrylic polymer and an ionic salt, the (meth)acrylic polymer comprising(A) 20 to 100 parts by weight of a (meth)acrylic monomer represented by the following formula (I):CH.sub.2.dbd.C(R.sub.1)COO--R.sub.2 --R.sub.3 (I)wherein R.sub.1 represents a hydrogen atom or a methyl group; R.sub.2 represents an alkyl chain having 6 to 12 carbon atoms; and R.sub.3 represents (XR.sub.4).sub.n XR.sub.5, wherein X represents --O-- or --S--; R.sub.4 represents an alkyl group having 1 to 4 carbon atoms; n represents 0 or an integer of 1 to 20; and R.sub.5 represents a hydrogen atom, a methyl group or an ethyl group,(B) 0 to 80 parts by weight of a (meth)acrylic monomer represented by the following formula (II):CH.sub.2.dbd.C(R.sub.1)COO--R.sub.6 (II)wherein R.sub.1 represents a hydrogen atom or a methyl group; and R.sub.6 represents an alkyl group having 2 to 12 carbon atoms, and(C) 0 to 30 parts by weight, per 100 parts by weight of the total amount of components (A) and (B), of a monomer copolymerizable with components (A) and (B).