Patent GB-1007829-A (GB)
Title: Improvements in and relating to epoxy resins
IPC: C08G59/68
Filed: 1962-06-26
Abstract: A curable composition consists of a compound with more than one visual epoxy group, and a catalyst which is a uranium oxide, a uranate, a polyuranate, or a compound of formula UX4Yn, UOX 2/z Yn, or VO2X 2/z Yn, X representing an acylate, alkoxy, aryloxy, alkylthis, or arylthis group; an inorganic acid anion or an anion of a chelating agent; z is the valency of X; Y is an uncharged complexing liquid and n has a value of 0-9.  Some specified catalysts are uranium-tetra acetate, -tetrapropionate, -tetrabutyrate, -tetrapentanoate, and -tetraoctoate; uranium tetrachloride, bromide or fluoride; uranium oxyfluoride; basic uranium nitrate or acetate; uranyl formate, acetate, propionate, laurate, stearate, abietate, (o-benzoylbenzoate), chloride, bromide, sulphate, phosphate, or nitrate; potassium uranyl nitrate; lithium uranyl sulphate; uranyl ethylenediamine bisacetylacetonate; uranyl bisbenzoylacetone pyridine; uranyl bisacetylacetonate-pyridine or -quinoline; sodium, potassium and ammonium uranate and biuranate; uranium oxide, trioxide and peroxide.  Solvents may be added or solid epoxides may be melted. Many monomeric and polymeric polyepoxides are mentioned.  The compositions may be cured with active organic hardeners containing one or more groups reaction with epoxy groups, e.g. OH, COOH, SH, NCO, acyl halides, oxidicarbonyl groups.  Suitable hardeners are listed.  Examples 1-4, 6-8, 12-53, and 56-60 use 3,4-epoxy-6-methylcyclohexylmethyl - 3,4 - epoxy - 6 - methylcyclohexanecarboxylate together with (1) the product of reacting maleic anhydride and a propylene oxide adduct of glycerol, and uranyl nitrate hexahydrate; (2) sebacic acid and uranyl butyrate; (3) methyl nadic anhydride and uranyl butyrate 4,6-uranyl butyrate; (7) uranium tetraoctoate; (8) uranyl nitrate hexahydrate; (12)-(18) and (20)-(24) and (30 polymerized fatty acids and uranyl nitrate hexahydrate; (25)-(28) polymerized fatty acids with uranyl butyrate, uranium tetraoctoate, uranyl o-benzoylbenzoate or ammonium diuranate; (31) dehydrated castor oil acid and uranyl nitrate; (32)-(34) tall oil acid and uranyl butyrate; (35)-(38) methyl nadic anhydride and uranyl nitrate hexahydrate; (39)-(41) hexahydrophthalic anhydride with uranyl nitrate, uranium tetraoctoate or uranium o-benzoylbenzoate; (43)-(51) mixed 3- and 4-methyl-1,2,3,6-tetrahydro phthalic anhydrides and various uranium catalysts; (53), (56) uranyl nitrate and a propylene oxide adduct of 1,2,6-hexanitriol.  Epoxy resins used in the examples are diethylene glycol - bis - (3,4 - epoxycyclohexanecarboxylate); 4 - vinylcyclohexene dioxide; bis - (3,4 - epoxy - 6 - methylcyclohexylmethyl)-adipate; and dicyclopentadiene dioxide.  Examples (57)-(58) describe the production of foamed resins, using 3,4-epoxy-6-methylcyclohexylmethyl - 3,4 - epoxy - 6 - methylcyclohexanecarboxylate, together with the reaction product of maleic anhydride and a propylene oxide adduct of glycerol, toluenediisocyanate, trichlorofluoromethane, a siloxane oxylalkylene copolymer and uranyl butyrate, uranyl nitrate hexahydrate.  In Examples (59), (60) a reaction product of maleic anhydride and a propylene oxide adduct of 1,2,6-hexanetriol was used, and the catalysts were uranyl chloride, uranyl actate or uranyl p-toluyl-o-benzoate.ALSO:In Example 31, a steel panel was dipped into a varnish solution, obtained by heating 3,4-epoxy-6-methylcyclohexylmethyl-3, 4-epoxy-6-methylcyclohexanecarboxylate with dehydrated castor oil p acid and uranyl nitrate hexahydrate as catalyst and thinning with xylene, dried and baked at 170  DEG C.