Low molecular weight poly- tetrafluoroethylene water dispersed liquid, production method of low molecular weight poly- tetrafluoroethylene powder and low molecular weight poly- tetrafluoroethylene

摘要

This invention contains the surface active agent whose removal is easy, at the same time, offers the low molecular weight poly- tetrafluoroethylene water dispersed liquid whose dispersed stability is good.As for this invention, the tetrafluoroethylene (TFE) the unit, or, the low molecular weight poly- tetrafluoroethylene which includes with the TFE unit and the above-mentioned TFE unit and the copolymerization possible denaturation monomer unit (PTFE) being the water dispersed liquid, the below-mentioned general formula (1)X (CF₂) _{m Y} (1)(In formula, X displays H or F, m displays the integer of 3 - 5, as for Y so3m, so4m, so3r, so4r, coom, po3m2 and po4m2 (as for M H and NH₄ or displays the alkaline metal, R carbon count displays alkyl group 1 - 12.)You display.)So the containing fluorine compound which is displayed 70 - 9000ppm is contained vis-a-vis the water dispersed liquid, it is the low molecular weight PTFE water dispersed liquid which features that average primary particle diameter of low molecular weight PTFE is 100 - 350nm.