Heterocyclic polymer solutions and products therefrom

Details Heterocyclic polymer solutions and products therefrom Heterocyclic polymer solutions and products therefrom

1977-10-26

1978-08-08

Michl, Paul R.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

156331, 260 25M, 264232, 260 304N, 521157, C08K 515

Patent

active

041056167

ABSTRACT:
New solvents have been found for certain poly(parabanic acids) and poly(iminoimidazolidinediones). Epihalohydrins and glycidyl acrylate have been found to be solvents. Cellular films are produced by immersing films of the polymer solutions in aprotic anti-solvents such as aliphatic ketones, esters, hydrocarbons, halogenated hydrocarbons and ethers.

REFERENCES:
patent: 3609113 (1971-09-01), Schade
patent: 3661859 (1972-05-01), Patton
patent: 3732185 (1973-05-01), Hocker
patent: 3933758 (1976-01-01), Patton
patent: 3969290 (1976-07-01), Kraft
patent: 4045337 (1977-08-01), Knickel

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