Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1979-01-19
1981-05-12
Welsh, Maurice J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 296F, 260 457P, 260 457PH, 260 4575R, 174110FC, 428379, 428389, C08K 551, C08K 552
Patent
active
042670985
ABSTRACT:
Mixtures of (a) copolymers of ethylene and tetrafluoroethylene, which in addition optionally contain up to 10 mole % of units of at least one ethylenically mono-unsaturated monomer copolymerizable with tetrafluoroethylene, with (b) phosphorus acids which in one of their tautomeric forms contain 2 or 3 oxygen atoms and 1 or 2 hydrogen atoms directly bonded to each phosphorus atom, or with salts of such acids, are described. These mixtures possess improved heat stability and can, where appropriate with interpolation of a melt granulation process, be used, in particular, for the coating of metals. Component (b) is added to the copolymer (a) in the dry form or preferably in the form of a solution during working up, and in particular is added either to the pulverulent copolymer or, more especially, to a moist product, isolated from dispersions, after the last washing process.
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Hartwimmer Robert
Kuhls Jurgen
Hoechst Aktiengesellschaft
Welsh Maurice J.
White R. A.
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