申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP1000950A2
公开(公告)日:2000-05-17
The invention relates to novel indanylidene compounds which are effective in absorbing ultra violet radiation and to light screening compositions comprising said indanylidene compounds of the general formula I
wherein
Xsignifies O or NH;
R1signifies C1-C20 alkyl, C2-C20 alkyl in which at least one methylene group is replaced by oxygen, C3-C20 alkenyl, C3-C20 alkynyl or a group YS;
R2signifies C1-C20 alkyl, C2-C20 alkyl in which at least one methylene group is replaced by oxygen, C3-C20 alkenyl, C3-C20 alkynyl or a group YS; or R1 and R2 can combine on adjacent C-atoms to form a dioxomethylene ring;
R3signifies C1-C20 alkyl, C2-C20 alkyl in which at least one methylene group is replaced by oxygen, C3-C20 alkenyl, C3-C20 alkynyl or a group YS;
R4, R5, R6each independently signify H or C1-C20 alkyl;
nsignifies 0, 1 or 2;
Ysignifies a linker group;
Ssignifies a silane-, an oligosiloxane- or a polysiloxane-moiety;
with the proviso that at least one of the residues R1, R2 or R3 signifies YS.
本发明涉及可有效吸收紫外线辐射的新型亚茚基化合物,以及包含通式 I 所述亚茚基化合物的光屏蔽组合物
其中
X表示O或NH
R1表示C1-C20烷基、其中至少一个亚甲基被氧取代的C2-C20烷基、C3-C20烯基、C3-C20炔基或基团YS;
R2 表示 C1-C20 烷基、其中至少一个亚甲基被氧、C3-C20 烯基、C3-C20 炔基或 YS 基团取代的 C2-C20 烷基;或 R1 和 R2 可在相邻 C 原子上结合形成二氧亚甲基环;
R3 表示 C1-C20 烷基、其中至少一个亚甲基被氧取代的 C2-C20 烷基、C3-C20 烯基、C3-C20 炔基或基团 YS;
R4、R5、R6 各自独立地表示 H 或 C1-C20 烷基;
表示 0、1 或 2;
Y 表示连接基团;
S表示硅烷、低聚硅氧烷或多聚硅氧烷分子;
但至少有一个残基 R1、R2 或 R3 表示 YS。