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US 3,981,945 AGranted
Coating compositions comprising a polysulfone and a fluorocarbon polymer
AssigneeImperial Chemical Industries PLC
InventorsTerence Edwin Attwood, Barry William Farrant
Life of this patent
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Abstract
A coating composition is provided which comprises (a) 10% to 90% by weight of at least one thermoplastic aromatic polysulphones 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.
Claims9
A coating composition which comprises a polymer mixture of (a) 10% to 90% by weight of at least one thermoplastic aromatic polysulphone having repeat units ##SPC8##
- alone or in conjunction with repeat units selected from at least one of ##SPC9##
- or repeat units (ii) or (iii) in conjunction with repeat units ##SPC10##
- and, correspondingly, 90% to 10% by weight of at least one fluorocarbon polymer selected from polytetrafluoroethylene and copolymers of tetrafluoroethylene with up to 15% by weight of another unsaturated monomer, said composition being in the form of a dispersion of said fluorocarbon polymer dispersed in a solution of said thermoplastic aromatic polysulphone in a solvent therefor.
Dependencies are inferred from the claim text.