Abstract: The present invention is directed to a method for the production of plastics, including foams, containing urethane groups and predominantly isocyanurate groups by reacting polyesters having a molecular weight of from 350 to 10,000, and containing at least two hydroxyl groups and containing phthalic acid residues and, optionally, other polyhydroxyl compounds having a molecular weight of from 400 to 10,000 and/or chain extenders having a molecular weight of from 32 to 400 with an excess of polyisocyanates in the presence of isocyanate-trimerization catalysts and optionally blowing agents, foam stabilizers and other additives, the improvement characterized in that polyesters are used whose acid components comprise at least 50%, by weight, phthalic acid residues and wherein 10 to 49%, preferably 20 to 40%, by weight, of the isocyanate groups react to form urethane groups and 51 to 90%, preferably 60 to 80%, by weight, of the isocyanate groups react to form isocyanurate groups.

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 polyparabanic acid derivative having a recurrent structural unit of the formula ##STR1## wherein X is O or S; each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, when taken separately is hydrogen or an aliphatic, aromatic or aliphatic-aromatic group; R.sup.1 and R.sup.2 when taken together complete a cycloaliphatic ring and R.sup.3 and R.sup.4 when taken together complete a cycloaliphatic ring and each of R.sup.5, R.sup.6 and R.sup.7, which may be the same or different, is an aliphatic, aromatic or aliphatic-aromatic residue of an organic isocyanate after removal of at least one isocyanate group and method of producing same by reacting a compound of the formula ##STR2## with at least one organic isocyanate having at least two isocyanate groups at a temperature of from -20.degree. to 400.degree. C.

Abstract: Processes for the production of hydantoins substituted by amide groups wherein unsaturated cyclic imide compounds are reacted with primary amins and then with organic isocyanates.

Abstract: A process for the preparation of an amide-substituted (thio)hydantoin which comprises reacting a primary mono- or poly-amine with an optionally substituted maleic acid amide reacting the resulting product with an organic mono- or poly-iso(thio)cyanate and subsequently cyclizing the resulting product by the action of heat.

Abstract: Parabanic acid aminals of the formula ##STR1## wherein R.sup.1 is ##STR2## wherein Z is selected from the group consisting of an aliphatic radical having 1-20 carbon atoms, an aromatic radical having 6-14 carbon atoms and an aliphatic-aromatic radical having 7-20 carbon atoms;R.sup.2 and R.sup.3 may be the same or different and each is selected from the group consisting of hydrogen, an aliphatic radical having 1-20 carbon atoms, an aromatic radical having 6-14 carbon atoms and an aliphatic-aromatic having 7-20 carbon atoms; R.sup.4 is hydrogen or ##STR3## with Z being as defined above; and R.sup.5 is the same as Z.

Abstract: Processes for the production of hydantoins substituted by amide groups wherein maleic acid imides or maleic acid monoamides are reacted with ureas.

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: Novel compounds which upon heating are converted into the corresponding phenol which is a catalyst for the trimerization of compounds having isocyanato groups to form isocyanurates have the formula: ##STR1## in which N REPRESENTS AN INTEGER OF FROM 1 TO 4A represents an aromatic hydrocarbon group obtained by removing the NCO group from a monomeric aromatic monoisocyanate containing 6 - 14 carbon atoms,R.sub.1 and R.sub.2 may be the same or different and represent a C.sub.1 to C.sub.6 alkyl group or a polymethylene chain containing 4 to 8 carbon atoms which together with the nitrogen atom form a heterocyclic ring,R.sub.3 may be hydrogen, chlorine, bromine or a C.sub.1 - C.sub.18 -alkyl group.

Abstract: New polyparabanic acid derivatives and their preparation by reacting .DELTA..sup.2 -imidazolines with organic polyisocyanates.

Abstract: New polyparabanic acid derivatives and their production by reacting .DELTA..sup.2 -imidazolines with organic polyisocyanates.

Abstract: This invention relates to a new process for the preparation of oligourethanes having isocyanate end groups blocked with alkanol and/or cycloalkanol groups, the compounds which can be obtained by this process and their use for the production of polyurethane resins by the isocyanate polyaddition process.

Abstract: A process for the preparation of (thio) hydantoins modified with carboxylic ester groups, wherein 1,2-ethylene dicarbocylic acid esters which may be substituted are reacted with (thio) urea compounds in a single stage reaction.

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: This invention relates to aminals of aromatic hydroxy-aldehydes and to a process for the production thereof. The compounds can be used in the production of dyes.