imidgruppen containing polymers, the maleimiden, one of which is a bismaleimidsiloxan, and aromatic diaminen production and manufacturing processes.

摘要

Heat-curable prepolymers containing imide groups, which have a very low melt viscosity. …??More precisely, these polymers are obtained by reaction between:… - (a) one or more conventional N,N'-bismaleimide(s), (b) an N,N'-bismaleimide of general formula: …IMAGE… in which: X denotes a valency bond, -O-, -S-, -S=O-, …IMAGE… each of R1 to R8 denotes a hydrocarbon radical, X is a number ranging from 2 to 8, and the sum y + z is between 0 and 100, (c) one or more aromatic diprimary diamine(s), (d) optionally one or more monomer(s) other than a bisimide and containing one or more polymerisable carbon-carbon double bond(s), (e) optionally a catalyst, and an additive (f) consisting either of an acrylate reactant (f1) or of an unhalogenated epoxy resin (f2). …??These polymers are employed especially for the production of preimpregnated intermediate articles without any solvent.