POLYMERES A GROUPEMENTS IMIDES FAITS A PARTIR DE DIAMINES ENCOMBREES ET LEURS PROCEDES DE PREPARATION

Heat-curable prepolymers containing imide groups, of low melt viscosity. More precisely, these prepolymers are obtained by reaction, at a temperature ranging from 50 DEG C, between: - (a) one or more N,N'-bismaleimide(s), - (b) one or more hindered diprimary diamine(s), for example of the 4,4&#...

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1. Verfasser:	YVES CAMBERLIN
Format:	Patent
Sprache:	fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	Heat-curable prepolymers containing imide groups, of low melt viscosity. More precisely, these prepolymers are obtained by reaction, at a temperature ranging from 50 DEG C, between: - (a) one or more N,N'-bismaleimide(s), - (b) one or more hindered diprimary diamine(s), for example of the 4,4'-diamino-3,3',5,5'-tetraalkyldiphenylmethane or 1,3- or 1,4-diaminotrialkylbenzene type, - one or more reactant(s) (c) and/or (d), (c) consisting of one or more substituted heterocyclic compound(s) taken from the group consisting of: vinylpyridines, N-vinyl-2-pyrrolidone, allyl isocyanurate, vinyltetrahydrofuran, (d) consisting of an imidazole compound, and - an acrylate reactant (e) consisting of one or more compound(s) of formula (CH2=CR6-CO-O)n-B with R6 = H or CH3, n = number ranging from 1 to 8 and B = organic radical of valency n. These prepolymers are employed for the production especially of preimpregnated intermediate articles without solvent.