CATALYST FOR CURING EPOXIDES Russian patent published in 2012 - IPC C08G59/00 C08G59/68 C08L63/00 C09J11/06 C09J163/00 C09J4/00 C09J7/00 B01J31/00 B01J31/22 

FIELD: chemistry.

SUBSTANCE: described is use of 1,3-substituted imidazole salts of formula I wherein R1 and R3 independently denote a methyl, ethyl, n-propyl, isopropyl, n-butyl, dibutyl or tertbutyl group, R2, R4 and R5 independently denote a hydrogen atom or an alkyl group with 1-8 carbon atoms, wherein R4 and R5 can also form an aliphatic or aromatic ring, X is an anion selected from: cyanide, cyanate, anions of phthalic acid, isophthalic acid, oxalic acid, malonic acid, amber acid, glutaric acid, adipic acid, benzoic acid, phenylacetic acid, formic acid, acetic acid, acetoacetic acid, lactic acid, glycolic acid, glyoxalic acid and methyl mercaptoacetic acid, and n equals 1, 2 or 3. 1-ethyl-2,3-dimethyl imidazolium acetate and a complex of acetic acid with 1-ethyl-2,3-dimethyl imidazolium acetate as imidazolium salts are excluded, at temperatures below 175°C as latent catalysts for curing compositions containing epoxy compounds. Described is a curable composition which contains epoxy compounds and a latent catalyst of formula I, as described above, except 1-ethyl-2,3-dimethyl imidazolium acetate. The composition is cured at temperature below 175°C. Described is use of said curable composition as means of coating or saturating, as an adhesive, composite material, for producing moulded articles or as an injection compound for filling, joining or reinforcing moulded articles. Described is use of said curable composition to produce composite materials by curing pre-impregnated fibres or fibrous fabric or by extrusion, drawing, winding, and a technique for moulding by resin impregnation and a resin infusion technique.

EFFECT: use of said 1,3-substituted imidazolium salts of formula I at temperature below 175°C as latent catalysts for curing compositions containing epoxy compounds.

19 cl, 4 tbl, 1 ex