SUBSTITUTED BENZOTRIAZOLES AND STABILIZED COMPOSITION, AND COVERING SYSTEM COMPRISING SAID BENZOTRIAZOLES Russian patent published in 1999 - IPC

FIELD: chemical industry. SUBSTANCE: present invention describes substituted benzotriazoles of general formula (A) wherein R is hydrogen, straight or branched alkyl containing 1-24 carbon atoms, or phenylalkyl containing 7-15 carbon atoms; R₂ is straight or branched alkyl containing 1-24 carbon atoms, and phenylalkyl containing 7-15 carbon atoms, said alkyl being substituted by one or more hydroxy groups, or radical of formula -CH₂CH₂COR₅ wherein R₅ is NH₂ or OR₆ wherein OR₆ is (OCH₂CH₂)_wOH wherein W is 1 to 12, or R₂ is (CH₂)_m-CO-X(Z)_p-Y-R₁₅ wherein X and Y are -O-; Z is alkylene containing 3-12 carbon atoms substituted by hydroxy group; R₁₅ is CO-C(R₁₈= CH₂ wherein R₁₈ is hydrogen or methyl, m is 0,1 or 2, and p is 1; R₃ is alkyl containing 8-20 carbon atoms, phenyl-alkyl containing 7-15 carbon atoms, aryl containing 6-10 carbon atoms, or R₃ is radical of formula wherein E is C₂-C₁₂ alkylene, C₅-C₁₂ cycloalkylene or E is C₈-C₁₂ alkylene interrupted by cyclohexylene, r is 0 or 1. The present invention describes stabilized composition comprising polymer which becomes destructible when exposed to unfavorable effect of actinic radiation, and substituted benzotriazole of formula (A). The present invention also describes covering system comprising effective amount of substituted benzotriazole of formula (A) as stabilizer. The claimed compounds and compositions based on said compounds have higher UV spectral power at higher wave-length values than those of the well known analogs. EFFECT: improved properties of the covering system. 21 cl, 28 ex