Abstract:
NEW DI-N,N''-YAMINIPROPYL-DIHYDROURACILS, FOR EXAMPLE 1,3-DI-(Y-AMINOPROPYL)-5,5-DIMETHYL-5,6-DIHYDROURACIL, AND THEIR USE AS CURING AGENTS IN CURABLE MOULDING, COATING AND ADHESIVE COMPOSITIONS WHICH CONTAIN A POLYEPOXIDE COMPOUND, FOR EXAMPLE A LIQUID POLYGLYCIDYL ETHER OF BISPHENOL A. CURING CAN BE CARRIED OUT AT RELATIVLEY LOW TEMPERATURES, FOR EXAMPLE AT 40*C. THE NEW TYPE OF CURING AGENT BRIDGES, IN RESPECT OF ITS GRADATION OF REACTIVITY, A GAP BETWEEN ALIPHATIC POLYAMINES AND CYCLOALIPHATIC POLYAMINES. THE NEW CURING AGENTS FURTHERMORE HAVE THE ADVANTAGE RELATIVE TO THE AROMATIC POLYAMINES OF BEING NON-TOXIC.
Abstract:
Curable moulding, coating and adhesive compositions which contain a polyepoxide compound, for example a liquid polyglycidyl ether of bisphenol A and, as the curing agent, a 1,1''-methylenebis-(3- gamma -aminopropyl-hydantoin), for example 1,1''methylene-bis-(3- gamma -aminopropyl-5,5-dimethyl-hydantoin). The curing can take place at relatively low temperatures. The new type of curing agent bridges, in the gradation of the activity, a gap between aliphatic polyamines and cycloaliphatic polyamines. The new curing agents furthermore have the advantage, relative to the aromatic polyamines, of being nontoxic.
Abstract:
Curable molding, coating and adhesive compositions which contain a polyepoxide compound, for example a liquid polyglycidyl ether of bisphenol A, and, as the curing agent, an N,N'' -di-( gamma aminopropyl)-hydantoin, for example 1,3-di-( gamma -aminopropyl)5,5-dimethyl-hydantoin. Curing can be carried out at relatively low temperatures, for example at 40* C. The new type of curing agent bridges, in respect of its gradation of reactivity, a gap between aliphatic polyamines and cycloaliphatic polyamines. The new curing agents furthermore have the advantage relative to the aromatic polyamines of being nontoxic.