POLYMERES THERMOSTABLES A BASE DE BIS-IMIDES ET D'OLIGOMERES AMINES

摘要

1355404 Glass fibre laminates RHONEPOULENC SA 22 Oct 1971 [23 Oct 1970 24 June 1971] 49315/71 Heading B5N [Also in Division C3] A composition comprises a thixotropic suspension of (a) a prepolymer reaction product of an unsaturated bis-imide where D is an unsaturated divalent radical and A a C 2-30 divalent radical with a polyamine having at least 2 primary NH 2 groups in proportions of 0À55 to 25 mols bis-imide per mol of NH 2 group, suspended in (b) water which may be mixed with up to an equal weight of an organic solvent boiling between 110 and 270‹ C. To prepare the composition the prepolymer should have a particle size preferably less than 100 Á. The compositions may be used to form pre-pregs of fibrous materials which may be laminated. The pre-preg may be dried at 100 to 200‹ C., stored at 30‹ C. or below and shaped and cured at up to 350‹ C. Examples illustrate various glass fabric laminates. Reference is made to Specifications 1,355,403, 1,190,718 and 1,137,592.