SYNTHETIC RESIN BASED BINDER FOR GLASS FIBER LAMINATE USED IN ELECTRICAL ENGINEERING Russian patent published in 2008 - IPC H01B3/30 

FIELD: electric insulating materials; synthetic resins or glass fiber laminates for producing binders of laminated plastics used, for instance, as insulation for low-voltage equipment.

SUBSTANCE: main drawback of prior-art binders is difficulty to predict, and in some cases to reproduce, curing and molding conditions. As a result, binder leak-out and its heavy loss, as well as flaws on glass fiber laminate surface may occur in the course of molding. Proposed binder for glass fiber laminate has ingredients and their proportion, as follows, mass percent: resol resin, 12-16; novolac resin CF-010, 2-16; epoxy resin, 12-16; n-tertiary butyl-phenol-formaldehyde resin 101L or 101K, 0.5-15; alcohol-toluene mixture (1 : 1), 40-50.

EFFECT: reduced leakage of binder in the course of molding, eliminated flaws on glass fiber laminate surface.

1 cl, 1 dwg, 1 tbl, 4 ex