Continuous process of producing polylaurolactam

Details Continuous process of producing polylaurolactam Continuous process of producing polylaurolactam

1976-01-15

1978-03-07

Anderson, Harold D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 6916

Patent

active

040779467

ABSTRACT:
A process of producing polylaurolactam comprising the steps of hydrolytic polymerization of laurolactam is performed in the presence of water, orthophosphoric and dicarboxylic acids at a temperature from 280.degree. to 310.degree. C under a pressure from 70 to 120 atm, leading to the formation of reaction mixture containing prepolymerizate and water, said mixture being a homophase system; removing water from said mixture by throttling said mixture down to a pressure of 0.1-0.005 atm under isothermal conditions at a flow rate of 20-90 m/sec; subsequent polymerization of the prepolymerizate accomplished in a layer at a temperature of 280.degree.-300.degree. C, which is 0.5-2.00 mm thick.
The process of the invention makes it possible to obtain a high quality end product by simple technology. Running of the continuous process under said conditions allows reduction of the time of the polylaurolactam production as compared to the prior-art processes.

REFERENCES:
patent: 3317482 (1967-05-01), Kunde et al.
patent: 3321447 (1967-05-01), Kunde et al.

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