Patent ID: 6949317

Claim:
A polymer gel electrolyte comprising: an electrolyte solution containing a plasticizer with at least two carbonate structures on the molecule and an electrolyte salt, and a matrix polymer, wherein the matrix polymer is an unsaturated polyurethane compound prepared by reacting: (A) an unsaturated alcohol having at least one (meth)acryloyl group and a hydroxyl group on the molecule; and (B) a polyol compound of general formula (2) below HO—[(R 7 ) h —(Y) i (R 8 ) j ] q —OH (2) wherein R 7 and R 8 are each independently a divalent hydrocarbon group of 1 to 10 carbons which may contain an amino, nitro, carbonyl or ether group, Y is —COO—, —OCOO—, —NR 9 CO— (R 9 being hydrogen or an alkyl group of 1 to 4 carbons), —O— or an arylene group, the letters h, i and j are each independently 0 or an integer from 1 to 10, and the letter q is a number which is ≧1; (C) a polyisocyanate compound; and (D) an optional chain extender.