FIELD: composite materials. SUBSTANCE: epoxy binder may be used in manufacture of glass-reinforced plastic pipes, vessels and other articles. The binder includes epoxy resin, hardener in the form of isomethyltetrahydrophthalic anhydride, accelerator in the form of 2,4,6 tris(dimethylaminomethyl)- phenol and modifier, plasticizer presenting mixture of dioxane alcohols and their high-boiling ethers. EFFECT: higher strength of glass-reinforced plastics and adhesive strength of binder to glass fiber, increased reliability and serviceability of glass-reinforced plastic pipes of various diameters due to introduction of modifier into binder. 1 tbl
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