Catalysis of oxirane-imide systems

Abstract

Abstract THIS PATENT DESCRIBES A NOVEL STORABLE EPOXY-IMIDE RESIN PRECURSOR COMPRISING A CURABLE OXIRANE MONOMER AND AN IMIDE, THE IMPROVEMENT WHEREIN THE SYSTEM IS PROVIDED WITH AN ACTIVATED CHROMIUM III TRICARBOXYLATE SALT CATALYST WHICH CONTAINS AVAILABLE COORDIATION SITES, AND WHICH SITES ARE RENDERED UNAVAILABLE IN THE PRESENCE OF CERTAIN NON-REACTIVE, REMOVABLE ELECTRON DONATING SOLVENTS. THAT IS TO SAY, THE CATALYST COMPOUND, IN THE PRESENCE OF PARTICULAR SOLVENTS IS RENDERED NONCATALYTIC; ON THE REMOVAL OF SAID SOLVENTS, CATALYTIC ACTIVITY IS RESTORED. THESE SOLVENTS INCLUDE BUT ARE NOT LIMITED TO SUCH POLAR ELECTRON COORDINATING SOLVENTS AS REMOVABLE METHANOL, ETHANOL, N,N-DIMETHYL FORMAMIDE, DIOXANE, TETRAHYDROFURAN, DIMETHYL SULFOXIDE, DIMETHYL SULFOLANE, NITRO ALKANES, NITRO AROMATICS, TETRAMETHYL UREA, N,N-DIMETHYLACETAMIDE, N-METHYLCAPROLACTAM AND N-METHYL PYRROLIDONE. UPON THE REMOVAL OF ONLY THE SOLVENT AS BE EVAPORATION, THE ACTIVITY OF THE CATALYST IS RESTORED, BY THE FORMATION OF UNOCCUPIED COORDINATION SITES, WHEREBY THE REACTION OF THE OXIRANE COMPOUND WITH THE IMIDE CAN TAKE PLACE.

Inventors

• 👤 A Katzakian
• 👤 R Steele

Bibliographic Details