Patent ID: 6379582
Filing Date: 2002-04-30
Classification: C09K

Abstract:
A composition for thermal energy storage, the composition comprising:about 1-2% by weight of a crosslinked alkali metal copolymer selected from the group consisting of a potassium polyacrylamide copolymer, a sodium polyacrylamide copolymer, a potassium polyacrylate/polyacrylamide copolymer and a sodium polyacrylate/polyacrylamide copolymer, the alkali metal copolymer having a particle size of at least 1500 microns; about 60-85% by weight of water having a pH ranging from 6.0 to 7.0; about 15-30% by weight of propylene glycol; and an effective amount of an antimicrobial agent to prevent microbe growth.