Electrical conductor insulated by a polyketones

Details Electrical conductor insulated by a polyketones Electrical conductor insulated by a polyketones

1975-12-22

1977-05-17

Lee, Lester L.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428411, H01B 330

Patent

active

040243141

ABSTRACT:
Described herein are melt-processable, solvent resistant polymers comprised of repeating units of formula ##STR1## having a tensile elongation to break of at least about 50% at room temperature and mean inherent viscosity within the range from about 0.8 to about 1.65. The polymers, which are suitable for high temperature resistant wire insulation, are prepared, e.g., by the hydrogen fluoride-boron trifluoride catalyzed polymerization of a p-phenoxybenzoyl moiety-containing monomer (e.g., p-phenoxybenzoyl halide, p-phenoxybenzoic acid, or C.sub.1 -C.sub.3 alkyl p-phenoxybenzoates) in the presence of a capping agent whose reactivity to acetylation is greater than about 150 relative to benzene reactivity of 1. Wet workup and spray drying techniques are described, the latter preferably including dilution of hydrogen fluoride with liquid SO.sub.2, either before or after polymerization.

REFERENCES:
patent: 3441538 (1969-04-01), Marks

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