摘要:
Rapid air drying thermosetting solvent solution primer compositions are disclosed which comprise volatile polar organic solvent having dissolved therein a fluorocarbon polymer in an amount of from 20% to 45% of total resin solids, a solvent-soluble, hydroxy-functional copolymer of monoethylenically unsaturated monomers containing from 5% to 30% of hydroxy-functional monoethylenic monomer in an amount of from 0.7 to 1.5 parts of hydroxy-functional copolymer per part of fluorocarbon resin, a resinous polyepoxide in an amount providing from 0.1 to 0.6 part of polyepoxide per part of hydroxy-functional copolymer, and a curing agent reactive with hydroxy functionality, preferably an aminoplast resin, for curing the hydroxy-functional acrylic copolymer and the polyepoxide. The primer is pigmented with inorganic pigment in a weight ratio with respect to the resin solids of from 0.2:1 to 0.8:1.
摘要:
There is disclosed a thermosetting solvent solution coating composition comprising volatile organic solvent having dissolved therein at least about 45% of a fluorocarbon polymer together with at least about 10% of an hydroxy-functional organic soluble copolymer of from 3% to 8°0 of 2-hydroxyethyl acrylate, balance consisting essentially of nonreactive monoethylenically unsaturated monomers, and an aminoplast curing agent in an amount to cure the hydroxy-functional copolymer, These coatings exhibit improved water spot resistance and minimum color change and gloss reduction on exterior exposure.
摘要:
@ Coating composition comprising (a) from 50 to 99% by weight of a thermoplastic aromatic polyether ketone and (b) from 50 to 1 % by weight of a perfluoroalkoxy polymer or a tetrafluoroethylene/hexafluoropropylene copolymer having hexafluoropropylene content of from 18 to 25% by weight. Other additives can be present. The components are mixed and granulated or powdered. The composition, when applied to, e.g. a steel plate, produces a coated film which is greatly improved in water repellency while retaining the desirable properties of the polyether ketone, including heat resistance, mechanical and electrical properties, and chemical resistance.
摘要:
The viscosity of thixotropic dispersions of polyvinyl fluoride in latent solvents is controlled by adding volatile alcohols or acids to decrease viscosity, stirring the dispersion to eliminate gas bubbles, and then adding volatile amines to increase viscosity on curing the amine and the alcohol or acid evaporate together to keep viscosity in desirable ranges.
摘要:
The viscosity of thixotropic dispersions of polyvinyl fluoride in latent solvents is controlled by adding volatile alcohols or acids to decrease viscosity, stirring the dispersion to eliminate gas bubbles, and then adding volatile amines to increase viscosity on curing the amine and the alcohol or acid evaporate together to keep viscosity in desirable ranges.
摘要:
Coating compositions of poly(arylene sulfide) and polytetrafluoroethylene have enhanced adhesion to substrates when they include barium or calcium sulfate, especially for coil coating use on cookware.