Abstract: Mixtures of PVF, bis-phenol-epichlorohydrin copolymer, hindered phenol, phosphite and mercaptoarylimidazole permit formation of thick PVF articles.

Abstract: Preparation of poly(vinyl fluoride) films with minimal defects is aided by the incorporation of toluene in the casting dispersion.

Abstract: In the aqueous polymerization of vinyl fluoride, the use of perfluoroalkylpropylamine salts as emulsifiers permits high yields and excellent polymer color.

Abstract: Substantially amorphous fluorine-containing perhalogenated copolymer having a glass transition temperature of -15.degree. C. to -100.degree. C. and consisting essentially of structural units having a fluorocarbon or chlorocarbon backbone and perfluorinated polyether side chains.

Abstract: Chlorodifluorovinyloxyperfluoroalkyleneoxyalkyl trifluoromethyl ketones and acyl fluorides; chlorodifluorovinyloxyperfluoroalkyleneoxyethylenes; substituted fluoroalkoxyperfluoroalkyleneoxyalkyl trifluoromethyl ketones and acyl fluorides; substituted fluoroalkoxyperfluoroalkyleneoxyethylenes; processes for their preparation and for the preparation of perfluorovinyloxyalkyleneoxyalkyl bromides; and copolymers of derivatives of the aforesaid vinyl compounds.

Abstract: Perfluoroketovinyl ether of the formula (as in claim 1) wherein n is an integer 1 to 4; copolymers of such ether and a fluorinated monomer, such as tetrafluoroethylene; ion-exchange resins of such copolymers; and ion-exchange membranes of such resins.

Abstract: Chlorodifluorovinyloxyperfluoroalkyleneoxyalkyl trifluoromethyl ketones and acyl fluorides; chlorodifluorovinyloxyperfluoroalkyleneoxyethylenes; substituted fluoroalkoxyperfluoroalkyleneoxyalkyl trifluoromethyl ketones and acyl fluorides; substituted fluoroalkoxyperfluoroalkyleneoxyethylenes; processes for their preparation and for the preparation of perfluorovinyloxyalkyleneoxyalkyl bromides; and copolymers of derivatives of the aforesaid vinyl compounds.

Abstract: Perfluoroketovinyl ether of the formula (as in claim 1) wherein n is an integer 1 to 4, copolymers of such ether and a fluorinated monomer, such as tetrafluoroethylene; ion-exchange resins of such copolymers; and ion-exchange membranes of such resins.

Abstract: Fluorinated phenolic polymer, process for its preparation, and use thereof, particularly in the form of a film as a membrane in an electrolytic cell, said polymer consisting essentially of recurring units of(1) --CF.sub.2 CFX--wherein X in each of the recurring units is independently selected from F, Cl, R and OR wherein R is perfluoroalkyl of 1 to 4 carbon atoms and ##STR1## wherein Y is Cl, R or OR wherein R is perfluoroalkyl of 1 to 4 carbon atoms; M is H, alkali metal or NR'.sub.4 wherein R' in each of the recurring units is independently selected from H and alkyl of 1 to 6 carbon atoms; x is an average value within the range about 0.2 to about 1.0; n is 1, 2 or 3; and p is 0 or 1,said polymer having 0 to about 21 units of (1) per unit of (2).

Abstract: Fluorinated phenolic polymer, process for its preparation, and use thereof, particularly in the form of a film as a membrane in an electrolytic cell, said polymer consisting essentially of recurring units of(1) --CF.sub.2 CFX-- wherein X in each of the recurring units is independently selected from F, Cl, R and OR wherein R is perfluoroalkyl of 1 to 4 carbon atoms and ##STR1## wherein Y is Cl, R or OR wherein R is perfluoroalkyl of 1 to 4 carbon atoms; M is H, alkali metal or NR.sub.4 ' wherein R' in each of the recurring units is independently selected from H and alkyl of 1 to 6 carbon atoms; x is an average value within the range about 0.2 to about 1.0; n is 1, 2 or 3; and p is 0 or 1,said polymer having 0 to about 21 units of (1) per unit of (2).