Hydrolytic process for the preparation of a melt stable polycapr

Details Hydrolytic process for the preparation of a melt stable polycapr Hydrolytic process for the preparation of a melt stable polycapr

1986-06-16

1988-05-24

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528315, 528323, C08G 6916

Patent

active

047467240

ABSTRACT:
The invention relates to a process for the preparation of a caprolactam that is not appreciably subject to re-equilibration during melt spinning of textile fibres. In the process such an amount of chain length regulating agent is used that the relative viscosity of the polyamide increases by not more than 0.5 units after 20 hour heat treatment in the solid phase in an inert gas atmosphere at between 110.degree. C. and 190.degree. C., after extraction.

REFERENCES:
patent: 3578640 (1971-05-01), Twilley et al.
patent: 4366306 (1982-12-01), Smith
patent: 4429107 (1984-01-01), Strehler et al.

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