THERMOSETTING BINDER Russian patent published in 2021 - IPC C08L63/00 C08L63/02 C08G59/42 C08G59/46 C08K5/04 C08K5/3445 C08J5/24 

FIELD: composite materials.

SUBSTANCE: present invention relates to a thermosetting binder for the manufacture of composite materials. Thermosetting binder contains 80-100 wt. pt. of epoxide resin based on bisphenol A, 15-60 wt. pt. of N,N,N´,N´-tetraglycidyl-4,4´-diaminodiphenylmethane, 155-245 wt. pt. of isomethyltetrahydrophthalic anhydride, 0.1-2.5 wt. pt. of 2-methylimidazole and 0.1-5.4 wt. pt. of resorcinol.

EFFECT: technical result of the present invention is a reduction in the pre-curing temperature to 150°C, which allows the use of more energy-efficient curing modes, an increase in the glass transition temperature of the epoxide binder to ensure the operation of products made of polymer composite materials at temperatures up to 120°C, a decrease in viscosity at an impregnation temperature of no more than 0.6 Pa·s, which allows the binder to be processed by injection technologies for a long time (working cycle), which, in turn, simplifies the technological process and does not require additional manufacturing of the binder during the working time, an increase in the technological viability up to 6 hours, an increase in its elastic-strength characteristics.

5 cl, 3 tbl, 7 ex