Process for the production of hydantoins and polyhydantoin resins

Claim 2

A process for producing hydantoins wherein an organic diisocyanate, diisothiocyanate, polyisocyanate or polyisothiocyanate is reacted with an unsaturated amido acid corresponding to the general formula ##STR13## in which the radicals R 1 , R 2 , R 3 and R 4 are same or different and represent hydrogen, an aliphatic, aliphatic-aromatic or aromatic radical, and R 1 and R 2 may additionally represent halogen, and y is an integer from 1 to 3, at a temperature of from 0° to 450° C.

Claim 3

Processes as claimed in claim 1, wherein a monofunctional unsaturated amido acid and an at least bisfunctional organic isocyanate or isothiocyanate are used.

Claim 4

Processes as claimed in claim 1, wherein an at least bisfunctional unsaturated amido acid and an at least bisfunctional organic isocyanate or isothiocyanate are used as starting materials.

Claim 5

Processes as claimed in claim 1, wherein in the general formula R 1 , R 2 , R 3 and R 4 represent hydrogen, an aliphatic radical with 1 to 20 carbons an aliphatic-aromatic radical with 7 to 20 C-atoms or an aromatic radical with 4 to 20 C-atoms.

Claim 6

Processes as claimed in claim 1, wherein the unsaturated amido acid is the reaction product of maleic acid anhydride with ammonia, methylamine, dimethylamine, dibutylamine, aniline, N-Methyl aniline, 4,4'-diaminodiphenyl methane, 4,4'-diaminodiphenyl ether, 2,4-diaminotoluene, 1,5-diamino-toluene, benzylamine, cyclohexylamine, hexamethylene diamine, tris-(aminophenyl)-methane, piperidine or morpholine.

Claim 7

Processes as claimed in claim 1, wherein the isocyanates or isothiocyanates are R.sub.5 --(NCO).sub.z and R.sub.5 (--NCS).sub.z in which R 5 represents an optionally substituted aliphatic radical containing from 1 to 20 carbon atoms, optionally substituted by halogen, alkyl and/or aryl groups, an optionally substituted aromatic radical containing from 6 to 12 carbon atoms, an optionally substituted cycloaliphatic radical containing from 5 to 12 carbon atoms, an optionally substituted aliphatic-aromatic radical containing from 6 to 20 carbon atoms, or an optionally substituted aromatic or cycloaliphatic radical containing from 4 to 12 carbon atoms and hetero atoms such as N, O or S, and z is an integer from 2 to 4, are used.

Claim 8

An oligomeric or polymeric hydantoin of the m-times recurring structural unit corresponding to the general formula (II): ##STR14## in which R 1 , R 2 , R 3 and R 4 , which may be the same or different, represent hydrogen, an aliphatic, aliphatic-aromatic or aromatic radical and R 1 and R 2 may additionally represent halogen, R 5 is unsubstituted or substituted aliphatic of 1-20 carbon atoms, unsubstituted or substituted aryl of 4-20 carbon atoms, or unsubstituted or substituted cycloaliphatic of 5-20 carbon atoms, and m is an integer from 2 to 1000.

Claim 9

An oligomeric or polymeric hydantoin of the m-times recurring structural unit corresponding to the general formula (II): ##STR14## in which R 1 , R 2 , R 3 and R 4 , which may be the same or different, represent hydrogen, an aliphatic, aliphatic-aromatic or aromatic radical and R 1 and R 2 may additionally represent halogen, R 5 is unsubstituted or substituted aliphatic of 1-20 carbon atoms, unsubstituted or substituted aryl of 4-20 carbon atoms, or unsubstituted or substituted cycloaliphatic of 5-20 carbon atoms, and m is an integer from 2 to 1000.

Claim 10

A temperature-resistant lacquer, film, adhesive or shaped article comprising a polyhydantoin as claimed in claim 7.