POLYMER COMPOSITION Russian patent published in 2013 - IPC C08L63/00 C08G59/40 C08K5/53 C08K5/09 C08K5/17 C08K5/3412 

FIELD: chemistry.

SUBSTANCE: invention relates to preparation of polymer compositions based on epoxy resins and cycloaliphatic dioxides, which are meant for making large-sized articles from composite materials. The composition is based on a mixture of epoxy resins and products of epoxidation of 2-4-atomic alcohols in ratio of 99:1 to 1:99. The curing agent is a product of reaction of an acid (A) - a compound of general formula R₂-R₁-COOH, where R₁ is an aliphatic, cycloaliphatic, aromatic hydrocarbon or heterocyclic fragment, R₂ is a substitute - Cl, -F, -NH₂, -NH-, -OH, -CH=CH-, -CH=CH, amine (B) - di- or polyamine of an aliphatic, cycloaliphatic or aromatic type together with a polyatomic alcohol containing 2-6 hydroxyls in one molecule (C). Components in ratio A:B:C from 70:29:1 to 20:70:10 are mixed in a medium of a di- or tricarboxylic acid ether and a monoatomic alcohol at temperature of 20-80°C for 10-120 minutes. The obtained ternary reaction product is mixed with a eutectic mixture of aromatic amines in a ratio ranging from 5:95 to 95:5 and with lactone or lactam. The composition contains the following (pts.wt): resin part -100, curing agent - 20-100, lactone or lactam - 3-30.

EFFECT: invention enables to obtain a composition with a long working life, low peak temperature when curing, improved elastic and strength properties of the composition after exposure to temperature of 180°C.

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