herdbara compositions on the basis of a bismaleimid and n-vinyl-2-pyrrolidone, and anvendning derav for framstellning formed compositions or for impregnation of electrical windings

摘要

1516445 Coils RHONE POULENC INDUSTRIES 16 Sept 1976 [19 Sept 1975] 38455/76 Heading H1P [Also in Division C3] Solenoids of aluminium wire are impregnated by dipping, with a solution comprising N, NSP1/SP- C4,4SP1/SP-diphenylmethane)-bis-maleimide and N- vinyl pyrrolid-2-one and heated at 180‹ C. for 30 minutes. After a second impregnation, baking at 200‹ C. for 24 hours is carried out.