Patent ID: 7514483
Filing Date: 2009-04-07
Classification: C08K,H05K

Abstract:
1. An aqueous dispersion of polytetrafluoroethylene comprising: from 55 to 70 mass % of polytetrafluoroethylene fine particles having an average particle diameter of from 0.1 to 0.5 μm, from 0.0001 to 0.02 mass %, based on polytetrafluoroethylene, of a fluorine-containing carboxylic acid salt represented by the formula (1), from 1 to 20 mass %, based on polytetrafluoroethylene, of a nonionic surfactant represented by the formula (2) and/or the formula (3), and from 0.01 to 0.3 mass %, based on polytetrafluoroethylene, of a fluorine-containing carboxylic acid salt represented by the formula (4); wherein formulas (1)-(4) are: formula (1): R formula (2): R formula (3): R formula (4): R