Abstract: Heat resistant polymers connected by ester and/or urethane groups and optionally amide- and/or imide groups and/or hydantoin and/or isocyanurate rings are obtained by crosslinking the polymers with trishydroxy alkyl triazolidine -3,5-diones.

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;A represents CN, COR, substituted or unsubstituted C.sub.1 -C.sub.20 aliphatic group, C.sub.7 -C.sub.20 aliphatic-aromatic group, 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 wherein the substituents are NO.sub.2, COOR.sub.4, CN, CO or OH; R and R.sup.4 are selected from the definition of R.sup.1 and R.sup.2 with the exclusion of halogen;M represents OH or ##STR2## and R.sup.6 represents hydrogen, unsubstituted or substituted C.sub.2 -C.sub.20 aliphatic, C.sub.5 -C.sub.12 cycloaliphatic, C.

Abstract: Hydantoins are prepared by reacting a monoisocyanate or a monoisothiocyanate with an unsaturated diamide at 0.degree.-450.degree. C. said diamide being a compound of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.6 may be the same or different and each is selected from the group consisting of hydrogen, alkyl of 1-20 carbon atoms, alkenyl of 1-20 carbon atoms, aryl of 4-20 carbon atoms and aralkyl of 7-20 carbon atoms, and R.sub.4 and R.sub.6 together are additionally together a heterocyclic having 3-7 carbon atoms wherein the nitrogen heteroatom is bonded to both R.sub.3 and R.sub.6, andR.sub.1 and R.sub.2 are also additionally halogen, andx and y each are integer from 1 to 3, with the proviso that at least one of x and y is 1.

Abstract: A process for the production of compounds containing hydantoin groups by reacting .alpha.-amino-carboxylic acid derivatives and organic isocyanates in the presence of acid groups and either in absence of any solvent or in the presence of a non-phenolic solvent.

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.

Abstract: Polyiso(thio)cyanates containing a (thio)hydantoin ring substituted by carboxylic acid amide groups in the molecule are obtained by reacting optionally substituted ethylene- 1,2-dicarboxylic acid anhydrides with amino alcohols and an excess of polyiso (thio) cyanates.

Abstract: An iso(thio)cyanate having at least two iso(thio)cyanate groups is reacted with an unsaturated amido acid at 0.degree.-450.degree. C., said amido acid being a compound of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different and each is hydrogen, aliphatic radical, aliphatic-aromatic radical or aromatic radical; R.sub.1 and R.sub.2 may additionally be halogen and y is an integer from 1-3.

Abstract: A process for the production of polycondensates linked by cyclic imide groups, wherein at least one organic polyisocyanate or masked isocyanate, formic acid and at least one cyclic dicarboxylic acid anhydride compound which, in addition to the cyclic anhydride group, is substituted at least once by another cyclic anhydride, carboxyl, carbalkoxy, carbaroxy or SO.sub.3 H group, are polycondensed at temperatures in the range from 0.degree. to 450.degree. C.

Abstract: A process is described for preparing hydantoins by reacting an isocyanate or isothiocyanate having 2 or more isocyanate or isothiocyanate groups with an unsaturated diamide at 0.degree.-450.degree. C. said diamide being a compound of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.6 may be the same or different and each is from the group consisting of hydrogen, alkyl of 1-20 carbon atoms, alkenyl or 1-20 carbon atoms, aryl of 4-20 carbon atoms and aralkyl or 7-20 carbon atoms, and R.sub.4 and R.sub.6 together are additionally together a heterocyclic having 3-7 carbon atoms wherein the nitrogen heteroatom is bonded to both R.sub.3 and R.sub.6, andR.sub.1 and R.sub.2 are also additionally halogen, andx and y each are integers from 1 to 3, with the proviso that at least one of x and y is 1.

Abstract: A process for the production of polycondensates linked by nitrogen containing five membered rings, wherein a unsaturated cyclic anhydride compound is polycondensed with alcohols and organic polyisocyanates.

Abstract: A process for the low solvent or solvent free coating of heat resistant substrates by using a coating substance which has a melting point or range below about 200.degree. C and which is heat crosslinkable. The substrate is coated at temperatures between about 20.degree. and 250.degree. C and the coating is subsequently heated to more elevated temperatures to effect crosslinking. The coating substance contains active hydrogen, preferably hydroxyl bearing compounds and blocked polyisocyanates which become reactive when the coating substance is heated to effect cross-linking. In a preferred embodiment, the blocked polyisocyanates consist of at least 40 equivalent percent alkanol or cycloalkanol blocked polyisocyanates. Also a coating substance containing at least 50 wt.% of a combination of active hydrogen, preferably hydroxyl bearing compounds and blocked isocyanates. The combination has a melting point of less than 200.degree. C and a blocked isocyanate group to active hydrogen ratio of about 1:2 to 1:9.

Abstract: A process for the production of polyimides by the condensation of cyclic polycarboxylic acid anhydrides with polyisocyanates and isocyanurates substituted with masked isocyanate groups in the presence of lactams or polyols, and the production of coatings on metals, in particular of lacquers on wires, and of films thereof.

Abstract: Production of polycondensates coupled by cyclic imide groups by polycondensing an organic polyisocyanate or a masked organic polyisocyanate, a cyclic carboxylic acid anyhydride which is substituted by at least one further cyclic anhydride group, a carboxyl group, an ester group or an SO.sub.3 H group, and a monohydroxyalkyl ether at a temperature of from 0 to 450.degree. C, lacquers produced therefrom and the use of said lacquers for coating substrates. Typical examples of said monohydroxyalkyl ethers include methyl-, isopropyl, cyclohexyl-, benzyl-, phenyl- and methoxyethyl-ethylene glycol or propylenglycol-monoethers.

Abstract: Reaction products containing free isocyanato groups are produced by reacting ketimines with polyisocyanates.

Abstract: A process for preparing compounds which contain hydantoin groups, which is characterized in that compounds which contain isocyanate or isothiocyanate groups are reacted with compounds which contain an .alpha.-halocarboxylic acid group or derivatives thereof at least once in the molecule.

Abstract: A process for preparing compounds containing hydantoin groups, wherein compounds which contain isocyanate or isothiocyanate groups are reacted with compounds which contain at least one, preferably two .alpha.-halocarboxylic acid amide groups or one .alpha., .alpha.'-dihalodicarboxylic acid diamide group.