Process for the preparation of poly(thio)hydantoins

Details Process for the preparation of poly(thio)hydantoins Process for the preparation of poly(thio)hydantoins

1978-11-08

1981-01-20

Cockeram, H. S.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 45, 528 73, 548309, 548310, 548311, 548313, 546210, 544130, 544139, C08G 7306, C07D23378, C09D 349, C09J 316

Patent

active

042463939

ABSTRACT:
A process for the preparation of a poly(thio)hydantoin, which comprises reacting an organic isocyanate or isothiocyanate having two or more isocyanate or isothiocyanate moieties with an unsaturated dicarboxylic acid of the formula: ##STR1## at a temperature of from -20.degree. C. to +500.degree. C., wherein R.sub.1 and R.sub.2 are hydrogen, halogen, substituted or unsubstituted aliphatic, aliphatic-aromatic, aromatic or heterocyclic.

REFERENCES:
patent: 3549599 (1970-12-01), Merten
patent: 3705874 (1972-12-01), Merten et al.
patent: 3817926 (1974-06-01), Pauze
patent: 4169931 (1979-10-01), Rottmaier et al.

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