Polytetrafluoroethylene dispersions in an organic solvent and dispersing agents employed therein

摘要

Polytetrafluoroethylene (PTFE) dispersions in an organic solvent, comprising: (A) from 2 to 40% by weight of PTFE in powder form; (B) from 50 to 95% by weight of an organic solvent; (C) from 0.5 to 10% by weight of a dispersing agent of formula: (RH-L)y-(RF-L)xRH wherein : x is an integer from 1 to 3; y is 0 or 1, with the proviso that x=1 when y=1; RH is a x-functional radical having an alkylic or polyoxyalkylenic structure; RF is (per)fluoropolyoxyalkylenic radical; L is a divalent organic group. Such dispersions are utilized for the surface treatment of metals, glass fibers, and the like, and in particular as mould release agents.