Process for the preparation of nylon 4,6

Details Process for the preparation of nylon 4,6 Process for the preparation of nylon 4,6

1986-07-25

1988-02-02

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

525420, 528336, C08G 6928, C08G 6930

Patent

active

047229977

ABSTRACT:
A reproducible method for the preparation of high molecular weight white poly(tetramethyleneadipamide) nylon 4,6 using moderate temperatures and relatively short reaction times is disclosed. In the method, the prepolymerization step is limited under controlled reaction conditions so that a prepolymer is formed with a very low degree of polymerization, whereby a shorter, commercially viable, after-condensation time is achieved to obtain a high molecular weight final poly-condensation polymer product.

REFERENCES:
patent: 4408036 (1983-10-01), Gaymans et al.
patent: 4460762 (1984-07-01), Gaymans et al.

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