D1479 STABLE LIQUID BIS(ACYL)PHOSPHINE PHOTOINITIATOR AND USE THEREOF IN RADIATION-CURABLE COMPOSITIONS Russian patent published in 2016 - IPC C09D133/08 C09D4/00 C04B41/63 C04B41/48 C07F9/50 C07F9/53 C08K5/50 C08J3/28 C08F2/46 C03C17/00 C03C25/00 

FIELD: chemistry.

SUBSTANCE: invention relates to radiation-curable compositions, selected from a group, comprising a coating composition for optical fibres, coating composition suitable for radiation curing on concrete, and coating composition suitable for radiation curing on metal. Composition contains liquid bis(acyl) phosphine of formula (I), where each of groups Ar¹, Ar² and Ar³ independently represents a substituted or unsubstituted aryl group and at least one free-radical polymerisable component. Liquid bis(acyl)phosphine of formula (I) used in radiation-curable composition, in particular, is bis(2,4,6-trimethylbenzoyl)phenylphosphine, wherein radiation-curable composition is used in combination with bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide.

EFFECT: technical result is high rate of hardening and good optical transparency and balance of main operational characteristics, including existence in liquid state for radiation-curable compositions.

19 cl, 1 tbl, 1 ex

(I)