| 摘要 |
Compsns. are claimed which comprise organic materials stabilised against light, oxygen and/or heat by inclusion of 2,4,6-triaryl-1,3,5-triazines or 2,4,6-triaryl-1,3- pyrimidines of formula (I) which act as crypto-light protectants, there also being claimed some of (I) which are novel cpds., such cpds. differing from (I) in the definitions of R<3>, R<4> and R<5>. n = 1 or 2; A = N or CH; R<1> and R<2> = e.g. H, 1-4C alkyl or -OR<7>; R<3> and R<4> = e.g. H; 1-4C alkyl or alkoxy; O- interrupted and OR<7>-substd. 3-12C alkoxy; Cl or OR<7>; R<5)<n=1) = e.g. -O.CO.R<12> or -O.R<17> or, when R<1> and R<2> are not OR<7>, also H; R<5)<n=2) = e.g. -O.(2-16C alkylene).O-; R<6> = e.g. H or 1-10C alkyl; R<7> = e.g. COR<11> or SO2R<13>; R<8> = e .g.1-8C alkyl; R<11> = e,g. 1-3C alkyl, CF3, CCl3, 1-4C alkoxy, 2 or 3C alkenyl, Ph, tolyl or xylyl; R<12> = e.g. 1-8C alkyl or Ph; R<13> = e.g. Ph or 7-9C alkylphenyl; R<16> = e.g. H, oxyl, 1-12C alkyl, 1-18C alkoxy, cyclohexyloxy or 7-11C phenylalkyl; and R<17> = e.g. 1-18C alkyl, allyl, or 1-12C alkyl substd. by -OR<7>, 1-18C alkoxy, -COOR<8> and/or -O.CO.R<11>.
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