Process for the production of polyamides

Details Process for the production of polyamides Process for the production of polyamides

1974-11-15

1976-11-02

Phynes, Lucille M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 78P, 260 78S, 264176F, 264211, C08G 6946

Patent

active

039896773

ABSTRACT:
An improved process for the production of polyamides of low extract content by the activated anionic polymerisation of at least one lactam containing at least 5 ring members at temperatures above the melting point of the polyamide in a continuously working polymerisation apparatus, optionally followed directly by shaping, the improvement comprises treating the polyamide melt obtained by polymerising said lactam in said polymerisation apparatus with water or steam and subsequently freeing it from volatile constituents by evaporation before the polyamide melt is discharged into the open.

REFERENCES:
patent: 2731081 (1956-01-01), Mayner
patent: 2904109 (1959-09-01), Malm
patent: 3015651 (1962-01-01), Kjellmark
patent: 3753955 (1973-08-01), Haylock et al.

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