| 摘要 |
1318648 Laminates CIBA-GEIGY AG 9 Sept 1970 [26 Sept 1969] 43205/70 Heading B5N [Also in Division C3] Laminates are prepared using an adhesive comprising an " advanced " (i.e. higher molecular weight) epoxy resin prepared by reacting an epoxy resin, a di-, tri- or tetra-hydric phenol and a catalyst which is an imidazole, benzimidazole, imidazoline, a di- or tetra-hydropyrimidine, a dihydroquinazoline or a salt or mixture of the above (see Division C3). In an example a resin is prepared by reacting a diglycidyl ether of bisphenol A (1000 g.) with 299 g. bisphenol A, 37 g. p-tert-butylphenylglycidyl ether and 0À04 g. imidazole. The resultant resin in acetone solution, hardened by dicyandiamide was used to prepare a 12-ply glass cloth laminate curing for 1 hour/350‹ F./500 p.s.i. |
