| 摘要 |
New thermostable polymers containing imide groups.
<??>More precisely, these polymers are obtained by reaction between:
(a) one or more N,N'-bismaleimide(s), (b) one or more hindered diprimary diamine(s) of the 4,4'-diamino-3,3',5,5'- tetraalkyldiphenylmethane or 1,3- or 1,4-diaminotrialkylbenzene type, (c) optionally one or more monomer(s) other than a bisimide and containing one or more polymerisable carbon-carbon double bond(s), (d) optionally a compound of the imidazole type, (e) an additive consisting of one or more diamino-s-triazines, and (f) an additive consisting of a chlorinated or brominated epoxy resin, an N,N'-alkylenebistetrahalophthalimide, a product containing two phenyl radicals joined directly by a single valency bond, a divalent group or an atom, in which each phenyl radical is substituted by a (meth)allyloxy radical and by at least two chlorine or bromine atoms; and/or an unhalogenated epoxy resin.
<??>These polymers are employed especially for the preparation of preimpregnated intermediate articles.
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