High molecular weight hydroxyphenylbenzotriazole uv-absorbers for thin film applications

1. A compound of formula (I) or (II),

wherein in formula (I)

R 1 , R′ 1 R 3 and R 5 independently of one another are hydrogen, C 1 –C 12 alkyl, C 5 –C 12 cycloalkyl, C 1 –C 4 -alkyl-substituted C 5 –C 12 cycloalkyl, phenyl, phenyl which is substituted by —OH and/or C 1 –C 10 alkyl; C 7 –C 9 phenylalkyl or C 7 –C 9 phenylalkyl which is substituted on the phenyl radical by —OH and/or C 1 –C 10 alkyl;

R 4 is a group of formula (III),

R 2 and R 21 are independently C 2 –C 18 alkylene, C 5 –C 7 cycloalkylene or C 1 –C 4 alkylenedi(C 5 –C 7 cycloalkylene), or

the radicals R 5 , R 2 and R 3 , together with the nitrogen atoms to which they are bound, perform a 5- to 10-membered heterocyclic ring,

b 1 is a number from 2 to 50,

R 22 is is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms; or R 22 is alkyl of 1 to 24 carbon atoms substituted by one or two hydroxy groups;

R 23 is hydrogen or halogen;

the terminal group T′ is hydrogen or a group

 wherein B is a group of formula (III) and

the terminal group T″ is

 wherein in formula (II)

p and q are independently 0, 1 or 2;

with the proviso, that if p and q are both zero X 1 , X 2 , X 3 and X 4 are a group of formula —NR 1 B;

R 7 , R 11 , R 12 and R 13 independently of one another are hydrogen or C 1 –C 12 alkyl,

R 8 , R 9 and R 10 independently of one another are C 2 –C 10 alkylene, and

X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 and X 8 independently of one another are a group —NR 12 R 13 or —NR 1 B wherein B is a group of the formula (III) as defined above;

with the proviso that at least one triazine ring is substituted with a group —NR 1 B.

2. A compound of formula (I) or (II) according to claim 1 wherein in the group of formula (III) R 22 is hydrogen, C 7 –C 9 -phenylalkyl or C 1 –C 8 alkyl.

3. A compound according to claim 1 wherein R 1 , R′ 1 , R 3 and R 5 independently of one another are hydrogen, C 1 –C 12 alkyl or C 5 –C 6 cycloalkyl.

4. A compound according to claim 1 wherein R 2 and R 21 independently are C 2 –C 8 alkylene.

5. A compound according to claim 3 wherein R 3 and R 5 have the same meaning.

6. A compound according to claim 1 wherein b1 is a number from 2 to 25.

7. A compound according to claim 1 wherein R 7 and R 11 independently are hydrogen or C 1 –C 4 alkyl and R 8 , R 9 and R 10 are C 2 –C 4 alkylene.

8. A plastic container or film which protects against the deleterious effects of ultraviolet radiation which comprises

(a) a clear or lightly colored plastic, and

(b) a compound of formula (I) or (II) according to claim 1 .

9. A plastic container or film according to claim 8 which is a food packaging material.

10. A plastic container or film according to claim 8 wherein the clear or lightly colored plastic is a polyolefin, a polyester, a polyvinylalcohol, a polyvinylacetate or a polycarbonate.

11. A plastic container or film according to claim 8 wherein the thickness of the film is from 10μ to 200μ and the thickness of the plastic container from 200μ to 1000μ.

12. A plastic container or film according to claim 8 wherein the compound of formula (I) or (II) is present in an amount of from 0.005% to 10%.

13. A plastic container or film according to claim 8 which is a multilayer construction of between 2 and 7 polymer layers containing the compound of formula (I) or (II) in at least 1 layer.

14. A plastic container or film according to claim 8 which contains as additional additive a phenolic antioxidant, a sterically hindered amine, and/or a phosphite or phosphonite.

15. A plastic container or film according to claim 8 which contains as additional additive an iron based additive as oxygen absorber.