Patent ID: 8053548

Claim:
A process for synthesizing hydrophilic polydimethylsiloxane elastomer comprising: mixing a base comprising 30 to 60 weight percent dimethylvinylated and trimethylated silica, 1 to 5 weight percent tetra(trimethylsiloxy)silane, and balance dimethyl siloxane, dimethylvinyl-terminated; with a curing agent comprising 40 to 70 weight percent dimethyl methylhydrogen siloxane, 15 to 40 weight percent dimethyl siloxane dimethylvinyl-terminated, 10 to 30 weight percent dimethylvinylated and trimethylated silica, and 1 to 5 weight percent tetramethyl tetravinyl cyclotetrasiloxane; adding a polymeric surfactant; cooling the mixture to a prescribed temperature for a period of time to allow surface segregation of said polymeric surfactant additive; and curing the mixture at an elevated temperature for a period of time.