Patent ID: 6498207
Filing Date: 2002-12-24
Classification: C08L,H05K

Abstract:
A polytetrafluoroethylene aqueous dispersion composition, which comprises from 30 to 65 wt % of fine particles of polytetrafluoroethylene obtained by emulsion polymerization, from 2 to 12 wt %, based on the polytetrafluoroethylene, of a nonionic surfactant, and at least 0.01 wt % and less than 1 wt %, based on the polytetrafluoroethylene, of at least one member selected from the group consisting of a polyethylene oxide having an average molecular weight of from 100,000 to 2,000,000 and a thickener based on a water-soluble polyurethane,wherein the composition has a viscosity of from 10 to 50 mPs, and wherein the nonionic surfactant is at least one member selected from the group consisting of nonionic surfactants having molecular structures represented by the Formulae (1) and (2): Râ€”Oâ€”Aâ€”Hâ€ƒâ€ƒ(1) wherein R is an alkyl group having a straight chain or a branched chain represented by CxH2x+1 where x=8 to 18, and A is a polyoxyalkylene chain comprising from 5 to 20 oxyethylene groups and from 0 to 2 oxypropylene groups Râ€²â€”C6H4â€”Oâ€”Aâ€²â€”Hâ€ƒâ€ƒ(2) wherein Râ€² is an alkyl group having a straight chain or a branched chain represented by Cxâ€²H2xâ€²+1 where xâ€²=4 to 12, and Aâ€² is a polyoxyethylene chain comprising from 5 to 20 oxyethylene groups.