BENZOXAZINES AND COMPOSITIONS CONTAINING SAME Russian patent published in 2019 - IPC C08L61/34 C08G73/02 C07D265/14 C08K5/357 C08J5/24 B29C43/00 B32B27/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to a curable composition for a composite material for making a prepreg, which contains more than 80 % by weight of a mixture of benzoxazines, wherein said mixture of benzoxazines contains: (A) a non-halogenated benzoxazine compound in a liquid form in a temperature range of 20–30 °C and selected from following Structure 1

(1)

;

and (B) a polyfunctional benzoxazine component containing one or more benzoxazine compounds with functionality of 2 or 3, where the weight ratio of (A) to (B) ranges from 50:50 to 10:90. Also disclosed is a continuous resin film obtained from such a curable composition.

EFFECT: technical result is the development of a curable composition stable at high temperatures within range of 180–250 °C and facilitating production of a resin film therefrom, which shows no signs of delamination from the separating paper, which leads to obtaining a prepreg from such a film of good and stable quality.

13 cl, 2 dwg, 1 tbl, 2 ex