Hydantoin and Thiohydantoin Derivatives

• Main Author: RUDOLF MERTEN
• Format: Patent
• Language: English
• Published: 06.05.1970
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; HETEROCYCLIC COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

1,190,342. Coating metal. FARBENFABRIKEN BAYER A.G. 29 Feb., 1968 [1 March, 1967], No. 9783/68. Heading B2K. [Also in Divisions C2 and C3] Metal surfaces, e.g. copper wire, are coated with polymers containing hydantoin or thiohydantoin rings which are derived from carboxylic acids or esters the formula I: wherein each of R, R1 and R2 is a hydrogen atom or an optionally substituted alkyl or cycloalkyl radical, R3 is an optionally substituted alkyl, aryl, cycloalkyl, aralkyl or heterocyclic radical, R4 is an optionally substituted aliphatic, aromatic, araliphatic or heterocyclic radical having a valency n, X is an oxygen or sulphur atom and n 2, 3 or 4. The polymerisation may be effected by reacting the above hydantoin or thiohydantoin derivatives with polyhydric alcohols, e.g. trimethylol propane, a polyfunctional amine or esters of the above formula in which R is derived from a polyhydroxy compound may be polymerised alone or together with a polyfunctional carboxylic compound, e.g. adipic acid or dimethyl terephthalate. Following application the polymer may be stored by heating in an oven at 300-400‹C.