A compound of the formula (I)
1
wherein
n is preferably 3;
G
1
, G
2
, G
3
and G
4
are independently of one another e.g. C
1
-C
4
alkyl;
A
1
is e.g. hydrogen or methyl;
A
2
is e.g. methylene;
A
3
′ and A
3
″ are e.g. C
1
-C
4
alkyl;
A
4
is e.g. C
1
-C
8
alkyl;
Y is e.g. a group of the formula (IV)
2
wherein R
1
is e.g. hydrogen or methyl, R
2
is e.g. methylene, R
3
′ and R
3
″ are e.g. C
1
-C
4
alkyl and R
4
is e.g. hydrogen or C
1
-C
8
alkyl; and
Z is e.g. a group of the formula (VI)
3
with A
10
′ and A
10
″ being independently of one another e.g. hydrogen or C
1
-C
4
alkyl and A
11
′ and A
11
″ being independently of one another e.g. C
2
-C
6
alkylene,
is useful for stabilizing an organic material against degradation induced by light, heat or oxidation.
该化合物的
化学式为(I)1,其中n优选为3;G1,G2,G3和G4彼此独立,例如C1-C4烷基;A1例如氢或甲基;A2例如亚甲基;A3'和A3''例如C1-C4烷基;A4例如C1-C8烷基;Y例如公式(IV)2中的基团,其中R1例如氢或甲基,R2例如亚甲基,R3'和R3''例如C1-C4烷基,R4例如氢或C1-C8烷基;Z例如公式(VI)3中的基团,其中A10'和A10''独立地例如氢或C1-C4烷基,A11'和A11''独立地例如C2-C6亚烷基。该化合物可用于稳定有机材料,以防止光、热或氧化引起的降解。