C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
400/9349
C08K 5/10 (2006.01) C08F 210/02 (2006.01) C08F 214/26 (2006.01) C08K 5/16 (2006.01) C08L 23/08 (2006.01) C08L 27/18 (2006.01)
Patent
CA 1164121
HOE 8O/F 915 -1- Abstract Process for the preparation of aqueous, colloidal dispersions of copolymers of the tetrafluoroethylene/ ethylene type An improved process for the preparation of aqueous, colloidal dispersions of copolymers comprising at most 60 mole % of units of tetrafluoroethylene, 60 to 40 mole % of units of ethylene and 0 to 15 mole % of units of at least one other a-olefinic monomer, which can be copoly- merized with tetrafluoroethylene and ethylene, in the presence of manganese compounds as the catalyst is described. In this process, the emulsion polymeriza- tion is carried out in an aqueous phase in the presence a) of a chain transfer agent of the formula X-CH2-COOR (X = C1, Br, COOH, COOR, COCH3, CH3, C2H5 or C3H7 ; and R = C1-C4 alkyl), and b) of a compound which stabilizes the dispersion and has the formula NH4-0-?-Y (Y - COONH4, COOH, CH3, CH20H, CH2COOH or CH2C00NH4) b) can additionally contain an ammonium salt of an inor- ganic non-metal acid, for example ammonium chloride or fluoride Terpolymers or quaterpolymers containing, in addition to tetrafluoroethylene and ethylene, prefer- ably hexafluoropropylene an /or a "bulky" vinyl monomer as the third and/or fourth comonomer are preferably pre- pared, The copolymer dispersions thus prepared have very low coagulate contents and are very stable and the copolymers have melt flow indices most appropriate to - 1a - the processing operations. They can be processed to coatings and shaped articles,
380722
Hartwimmer Robert
Sulzbach Reinhard A.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Dyneon Gmbh
LandOfFree
Process for the preparation of aqueous, colloidal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the preparation of aqueous, colloidal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of aqueous, colloidal... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-18642