BLEND OF EPOXY RESIN CONTAINING STERICALLY HINDERED NITROGEN AND TRIMELLITIC ANHYDRIDE

• Main Author: GRIGGS ALLEN L
• Format: Patent
• Language: English
• Published: 21.10.1989
• Edition: 4
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

The epoxy resin having an improved storage stability is composed of a blend of (A) a major proportion by wt. of polyglycidyl ether of bisphenol A (Durrans' softening point 60-130 C), (B) 5-150% of a stoichiometric amount of trimellitic anhydride, and (C) a small amount of cat., characterised in that the blend contains by wt. of the polyglycidyl ether 0.1-0.5% at least one hindered N-contg. compound which (1) has an aq. pKa greater than 3.5, (2) has a B.P. above 125 C, and (3) is soluble in the polyglycidyl ether.