Patent ID: 7612139
Filing Date: 2009-11-03
Classification: C08F,C08J,C08L,C09D

Abstract:
1. A stabilized aqueous fluoropolymer dispersion comprising: about 30 to about 70 weight % non-melt-processible fluoropolymer particles having an SSG of less than about 2.225, said fluoropolymer particles comprising a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene; and about 2 to about 11 weight % of aliphatic alcohol ethoxylate nonionic surfactant based on the weight of said fluoropolymer, wherein said dispersion is free of surfactants containing aromatic groups, contains less than 100 ppm of fluorosurfactant based on the weight of said dispersion and wherein said dispersion has a viscosity of less than 100 mPa·s at 23±3° C.