Polyhydantoins from unsaturated carboxylic acids and polyiso(thi

Details Polyhydantoins from unsaturated carboxylic acids and polyiso(thi Polyhydantoins from unsaturated carboxylic acids and polyiso(thi

1979-12-06

1981-09-15

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 48, 528 49, 528 52, 528 53, 528 54, 528 55, 528 56, 528 58, 528 75, 548308, 548310, 548317, 548319, C08G 1834, C08G 1838, C08G 1867, C07D23380

Patent

active

042898684

ABSTRACT:
Poly(thio)hydantoins are prepared by reacting an iso(thio)cyanate having at least two iso(thio)cyanate moieties with a compound of the formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and each represents hydrogen, halogen, a C.sub.1 -C.sub.20 aliphatic group, a C.sub.7 -C.sub.20 aliphatic-aromatic group, a C.sub.6 -C.sub.20 aromatic group or a heterocyclic group having from 4 to 16 ring members and at least one N, O or S atom;

REFERENCES:
patent: 3549599 (1970-12-01), Merten
patent: 4089860 (1978-05-01), Merten et al.
patent: 4182812 (1980-01-01), Zecher et al.
patent: 4196274 (1980-04-01), Zecher et al.

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