| 摘要 |
PURPOSE:To obtain the title material which does not form any irreversibly deteriorated product and has excellent weatherability, by mixing a high- molecular substance, a specified spirooxazine compound, and a triplet quencher. CONSTITUTION:A high-molecular substance (A) which is optically transparent and has excellent film-forming ability (e.g., polyvinyl butyral) is mixed with 0.1-50wt., based on component A, spirooxazine compound (B) of formula I [wherein R<1-3> are each (substituted)alkyl, cycloalkyl or aryl, provided that R<2> and R<3> may be combined together to form a ring, and R<1> may have another spirooxazine ring bound thereto through alkylene or arylene, thereby forming a dimer compound as a whole; R<4> is H or 1-5C alkyl; X and Y are each an optionally substituted aromatic hydrycarbon ring or aromatic heterocyclic ring; Z is O or S] and 0.1-50wt.%, based on component A, triplet quencher (C) preferably comprising a nitroxy free radical of formula II [wherein R<5> and R<6> may be combined together to form a ring and are each (substituted)aryl with which the unpaired electron can form a conjugated system, or bulky (substituted)t-alkyl]. |
