| abstract |
A novel merocyanine derivative useful as an additive for preventing photodegradation by ultraviolet rays is provided. The compounds represented by formulas (1) and (2) and / or geometric isomer forms thereof. (R1 and R2 are each independently H, one or more hydroxy-substituted / unsubstituted C1-C22 alkyl, C2-C22 alkenyl or C2-C22 alkynyl; R3 is a-(C = O) OR6 group or-(CO NHR6 group; R6 may be interrupted by one or more -O- or -NH-(CH2) n- ring; n is a number from 2 to 7; R7 and R8 are each independently H Or-(CH2) n-ring optionally interrupted by one or more O; R9 and R10 may be interrupted by H or -O- or -NH-(CH2) n-ring; A -O- or -NH; R11 may be interrupted by one or more O, C1-C22 alkyl, C2-C22 alkenyl or C2-C22 alkynyl) |