| abstract |
[OBJECT]Providing a polytetrafluoroethylene (PTFE) aqueous dispersion, whereby polytetrafluoroethylene (PTFE) coating film wherein cissing is prevented, the thickening temperature is high, the defoaming property is good, shear stability is good and there is no coloration after the baking, can be obtained. [MEANS OF SOLVING PROBLEMS]A PTFE aqueous dispersion comprising from 20 to 70 mass % of microparticles of a PTFE and from 1 to 12 mass %, based on the mass of the PTFE, of a non-ionic surfactant represented by the formula (1): n nR 1 —O-A-X (1) n nwherein R 1 is a C 6-18 alkyl group, O is an oxygen atom, A is a polyoxyalkylene group comprising from 1 to 3 oxybutylene groups and from 5 to 20 oxyethylene groups, and X is a hydrogen atom or a methyl group. |