| 摘要 |
<p>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.</p> |
