Process for the production of polyamide mouldings

Details Process for the production of polyamide mouldings Process for the production of polyamide mouldings

1974-05-21

1976-12-14

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

260 78L, 264 406, 264329, 264331, 264349, B29B 504, B29F 104, B29F 302

Patent

active

039976467

ABSTRACT:
An improved process for the production of polyamide mouldings by activated, anionic polymerisation of lactams having at least five ring members by means of screw injection-moulding machines and screw extruders, the improvement comprises polymerising the lactam melt containing an activator and a catalyst partially in a stirrer unit up to a relative viscosity of at least 1.4 measured at 25.degree. C on a 1% by weight solution of the polyamide in cresol.

REFERENCES:
patent: 3121768 (1964-02-01), Boyer
patent: 3200095 (1965-08-01), Wichterle et al.
patent: 3239490 (1966-03-01), Gee et al.
patent: 3492275 (1970-01-01), Bigot et al.
patent: 3634574 (1972-01-01), Reinking et al.
patent: 3676544 (1972-07-01), Reinking et al.

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