POLYCYANURATE COMPOSITION, PREPREG BASED THEREON AND ARTICLE MADE THEREFROM Russian patent published in 2014 - IPC C08G18/58 C08L63/00 C08J5/24 B32B27/38 

FIELD: chemistry.

SUBSTANCE: invention relates to cyanic ester-based polymer compositions which are reinforced with fibrous filler and are used for producing structural polymer composite materials with operating temperature of up to 200°C and articles from said materials which can be used in aviation, aerospace, motorcar, ship-building and other industries. The invention also relates to prepregs which include said polymer composition and articles made from said prepregs. The cyanic ester-based polymer composition contains epoxy resin, which is a modifier and selected from: epoxy diane resin, epoxy novolac resin, nitrogen-containing epoxy resin or mixtures thereof, wherein components of the composition are in the following ratio, wt %: cyanic ester 55-95, epoxy resin 5-45. The composition can further contain a solvent selected from: acetone, ethyl acetate, isopropyl alcohol or mixtures thereof. The prepreg includes the described polymer composition and fibrous filler, wherein components of the prepreg are in the following ratio, wt %: polymer composition 30.0-50.0, fibrous filler 50.0-70.0. The fibrous filler used in the prepreg can be fabric or bundles or strips based on carbon or glass fibre. An article is made from said prepreg by moulding.

EFFECT: low viscosity of the cyanic ester-based polymer composition when processing and homogeneity of the composition, which enables processing thereof via a prepreg technique and enables to obtain water-resistant articles from polymer composite materials with improved thermomechanical properties, low coefficient of variation of physical and mechanical properties, well retained strength properties at high temperatures (up to 200°C), and reduced shrinkage of the composition during processing.

5 cl, 3 tbl, 12 ex