Two-stage hydrolysis process for the preparation of nylon 6

Details Two-stage hydrolysis process for the preparation of nylon 6 Two-stage hydrolysis process for the preparation of nylon 6

1980-04-21

1982-01-12

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

526 65, 526 67, 526 68, 526 71, C08G 6916

Patent

active

043106595

ABSTRACT:
A two-stage hydrolysis process for polymerizing epsilon-caprolactam is disclosed comprising a first stage from a temperature of about 180.degree. C.-260.degree. C., a pressure of 20 to 150 psig, for a period of about 0.5 to 4 hours, then before equilibrium conditions are reached a second stage at a temperature of about 200.degree. C.-260.degree. C., a pressure of about 100-900 Torr for a period of about 2 to 15 hours, while continuously removing most of the water so that water is removed both during hydrolyzation and during the subsequent polycondensation, whereby the cyclic dimer content of the shaped polymer article is below 0.2 percent by weight.

REFERENCES:
patent: 2562796 (1951-07-01), Koch
patent: 3090773 (1963-05-01), Papero et al.
patent: 3171829 (1965-03-01), Wiesner et al.
patent: 3287322 (1966-11-01), Zimmer et al.
patent: 3548482 (1969-07-01), Goto et al.
patent: 3558567 (1971-01-01), Twilley et al.
patent: 3578640 (1971-05-01), Twilley et al.
patent: 3813366 (1974-05-01), Wright et al.
patent: 4049638 (1977-09-01), Doerful et al.

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