摘要:
Production of coagulated dispersion grades of PTFE using an aqueous emulsion polymerization process which employs an initiator system comprising disuccinic acid peroxide and ammonium sulphite, the latter being added during the course of the polymerization. The resulting polymer can be fabricated into porous products of improved properties.
摘要:
Production of coagulated dispersion grades of PTFE using an aqueous emulsion polymerization process which employs an initiator system comprising disuccinic acid peroxide and ammonium sulphite, the latter being added during the course of the polymerization. The resulting polymer can be fabricated into porous products of improved properties.
摘要:
A coating composition is provided which comprises (a) 10% to 90% by weight of at least one thermoplastic aromatic .[.polysulphones.]. .Iadd.polysulphone .Iaddend.preferably having a reduced viscosity of at least 0.3 (measured at 25.degree. C. on a solution in dimethyl formamide containing 1 g of polymer in 100 cm.sup.3 of solution) and (b) 90% to 10% by weight of at least one fluorocarbon polymer.
摘要:
Substrates are coated with a composition comprising a low molecular weight polyethersulphone containing hydroxyl and groups and having a reduced viscosity of less than 0.25 (as measured at 25.degree. C on a solution of the polymer in dimethyl formamide containing 1 g of polymer in 100 cm.sup.3 of solution) and a fluorocarbon polymer dispersed in an aqueous medium, drying the coating and thereafter baking it in air at 420 to 450.degree. C.
摘要:
A coating composition comprises a dispersion of a fluorocarbon polymer in an inert diluent having dissolved, or preferably dispersed, therein a low molecular weight (RV less than 0.25) polyethersulphone or precursor thereto.