Manufacture of polyamides

Details Manufacture of polyamides Manufacture of polyamides

1975-12-29

1977-10-11

Phynes, Lucille M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 78S, 260 96R, 2602393A, C08G 6946

Patent

active

040534570

ABSTRACT:
A process for the manufacture of polyamides from .epsilon.-caprolactam and/or other polyamide-forming starting compounds by polymerization and subsequent extraction of the polymer. The extract containing solvent, monomer and oligomers is concentrated in the absence of atmospheric oxygen, the surfaces which come into contact with the extract being made of materials which are inert under the conditions of the concentration process, and the concentrate, without further purification or separation, is polymerized by itself or together with other polyamide-forming starting compounds.

REFERENCES:
patent: 3361721 (1968-01-01), Markel et al.
patent: 3449220 (1969-06-01), Geisler et al.
patent: 3598537 (1971-08-01), Kraft
patent: 3639659 (1972-02-01), Nieswandt et al.
patent: 3905946 (1975-09-01), Nieswandt et al.

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