Patent ID: 6800694
Filing Date: 2004-10-05
Classification: C08F,C08J

Abstract:
A process for preparing a fluorine-containing graft copolymer comprising, in a non-oxidizing environment:(1) heating a peroxidized olefin polymer material to a temperature of about 60Â° to about 140Â° C., (2) adding (a) at least one fluorinated gaseous monomer having the formula CR1R2&boxH;CR3R4, where R1=H, F, or Cl; R2=H, F, or Cl; R3=H, F, CH3, CF3, or Cl, and R4=H, F, or Cl, wherein at least two fluorine atoms are present, and, optionally, (b) at least one non-fluorinated monomer selected from the group consisting of (i) vinyl-substituted aromatic, heterocyclic, and alicyclic compounds, (ii) unsaturated aliphatic nitriles, and (iii) unsaturated aliphatic monocarboxylic acids or esters thereof, wherein the total amount of monomers added is about 1 to about 100 parts per hundred parts of the olefin polymer material, to produce and maintain a pressure of about 200 to about 900 psi, (3) heating at a temperature within the range specified in step (1) for about 1 to about 6 hours, (4) cooling to room temperature, and (5) releasing the pressure to remove unreacted monomer.