Patent ID: 6774176
Filing Date: 2004-08-10
Classification: C08F,C14C,D06M

Abstract:
Process for producing fluorinated polymers in two stages comprisinga) emulsification of a mixture of monomers comprising: from 20 to 99.9% by weight of at least one fluorinated (meth)acrylic monomer (A), from 0 to 65% by weight of at least one nonfluorinated acrylic or vinyl monomers (B), and from 0.1% to 15% by weight of at least one polar monomer (C), using energetic emulsifying treatment, including ultrasound, colloid mill or high-pressure homogenizer to yield fine mixture droplets having a mean diameter of 50-500 nm, and b) polymerization of the said mixture at a temperature ranging from 20 to 100Â° C. using radical initiators, the level of organic cosolvent being less than 0/2% by weight of the total weight of the emulsion, and the level of coagulum being less than 1% by weight of the total weight of monomers.