Abstract: Process for the production of PCTFE homopolymer and/or copolymer resins by the use of an aqueous suspension system incorporating a redox initiator system which comprises t-butyl hydroperoxide and sodium metabisulfite to initiate the polymerization or copolymerization process. The process parameters may be controlled to provide a PCTFE homopolymer or copolymer resin having a desired target range of molecular weights. The process provides stable PCTFE polymer suspensions which exhibit a low tendency to coagulate and further exhibit good wettability of the homopolymer and copolymer particles, notably in the absence of soaps.

Abstract: Very small amounts of certain metal ions promote copolymerization of aliphalic dicarboxylic acids with .alpha.,.beta.-ethylentically unsaturated monomers in an aqueous solution system maintained at a given pH range, whereby the amount of unreacted dicarboxylic acid monomer is significantly reduced while control of molecular weight of the resulting compolymers is maintained.