COMPOSITION OF EPOXYBISMALEIMIDE BINDING AGENT FOR PREPREGS (VERSIONS), METHOD OF OBTAINING EPOXYBISMALEIMIDE BINDING AGENT (VERSIONS), PREPREG AND ARTICLE Russian patent published in 2008 - IPC C08L63/00 C09J163/00 C08J5/24 B32B27/38 C08G59/40 

FIELD: chemistry.

SUBSTANCE: first version of invention claims composition of the following component ratio, wt %: N,N,N',N'-tetraglycidyl-4,4'-diamino-3,3'-dichlordiphenylmethane 24.8÷42.1 and triglycidyl-aminophenol as polyfunctional epoxy resins 11.5÷25.8, polycrystalline powder of N,N'-hexamethylenebismaleimide as bismaleimide 25.8÷41.3, polycrystalline powder of 4,4'-diaminodiphenylsulfone as solidifier 17.4÷22.6. Second version of invention claims composition of the following component ratio, wt %: N,N,N',N'-tetraglycidyl-4,4'-diamino-3,3'-dichlordiphenylmethane 21.6÷49.5 and triglycidyl bisphenol-A ether as polyfunctional epoxy resins 16.1÷32.4, polycrystalline powder of N,N'-hexamethylenebismaleimide as bismaleimide 3.5÷27.0, polycrystalline powder of 4,4'-diaminodiphenylsulfone as solidifier 19.0÷25.8. Method of obtaining the claimed compositions involves addition of polycrystalline 4,4'-diaminodiphenylsulfone powder to homogenous polyfunctional epoxy resin melt during stirring at 120÷130°C in minimum time sufficient for its complete dissolution. Then the temperature of obtained homogenous melt is lowered to 90÷100°C. By further stirring polycrystalline powder of N,N'-hexamethylenebismaleimide is added to the melt in minimum time sufficient for its complete dissolution. Prepreg includes components at the following ratio, wt %: the claimed epoxybismaleimide binding agent 20-48 and fiber filler 52-80. An article is produced by the claimed prepreg modelling.

EFFECT: improved durability of binding agent and increased vitrifying temperature and flexural strength of article.

6 cl, 2 tbl, 10 ex