Heat-curable epoxide resin compositions

Details Heat-curable epoxide resin compositions Heat-curable epoxide resin compositions

C - Chemistry, Metallurgy

08

G

402/268

C08G 59/40 (2006.01)

Patent

CA 1238746

Case 3-15211/+/ARL 358 HEAT-CURABLE EPOXIDE RESIN COMPOSITIONS ABSTRACT Heat-curable compositions are described, comprising (a) an epoxide resin and (b) an effective amount of a urea of formula Ar-NHCON(R3)R4 where Ar represents an aromatic group linked through an aromatic carbon atom to the indicated nitrogen atom and which is substituted by an amido group, and R3 and R4 each represent an aliphatic, cycloaliphatic, or araliphatic hydrocarbyl group, optionally substituted by a halogen atom or a hydroxyl group, or R3 may further represent a hydrogen atom, or R3 nd R4, together with the indicated nitrogen atom, may represent a heterocyclic ring of 3 to 5 carbon atoms which may also have one oxygen atom in the ring. Such amidoarylureas may be used alone with the epoxide resin, or in combination with an accelerator for the heat-curing reaction, selected from dicyandiamide, carboxylic acid hydrazides, succinimide, cyanoacetamide,1-cyano-3-(lower alkyl)guanidines, imidazoles, and carboxylic acid-tertiary amine salts.

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