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Paramétrages

Paramétrages

1. WO2005066300 - MELANGES DE PHOTO-INITIATEURS POUR DECLENCHEMENT HAUTE VITESSE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

What is claimed is:

1. An oxygen scavenger composition comprising:
a) an organic oxygen scavenger,
b) a transition metal catalyst, and
c) a blend of at least two photoinitiators selected from
i) 1 ,3,5-tris(4-benzoylphenyl) benzene,
ii) thioxanthone derivative,
iii) acyl phenylphosphineoxide derivative, and
iv) diphenyl sulfide derivative.

2. The composition of claim 1 wherein the organic oxygen scavenger comprises one or more material selected from the group consisting of
i) ethylenically unsaturated hydrocarbon,
ii) a polymer having a polymeric backbone, cyclic olefinic pendent
group, and linking group linking the olefinic pendent group to the
polymeric backbone,
iii) a copolymer of ethylene and a strained, cyclic alkylene, and
iv) ethylene/vinyl aralkyl copolymer.

3. The composition of claim 1 wherein the blend of photoinitiators comprises between 500 and 2000 ppm by weight of the oxygen scavenger composition.

4. The composition of claim 1 wherein the blend of photoinitiators comprises a blend of 1 ,3,5-tris(4-benzoylphenyl)benzene and isopropylthioxanthone,

5. The composition of claim 1 wherein the blend of photoinitiators comprises a blend of 1,3,5-tris(4-benzoylphenyl)benzene and bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide.

6. The composition of claim 1 wherein the blend of photoinitiators comprises a blend of 1,3,5-tris(4-benzoylphenyl)benzene and 4,4'-benzoylmethyl diphenyl sulfide.

7. The composition of claim 1 wherein the blend of photoinitiators comprises a blend of isopropylthioxanthone and bis (2,4,6-trimethylbenzoyl)-phenylphosphineoxide.

8. A film comprising at least one layer comprising:
a) an organic oxygen scavenger,
b) a transition metal catalyst, and
c) a blend of at least two photoinitiators selected from
i) 1 ,3,5-tris(4-benzoylphenyl)benzene,
ii) thioxanthone derivative,
iii) acyl phenylphosphineoxide derivative, and
iv) diphenyl sulfide derivative.

9. The film of claim 8 wherein the organic oxygen scavenger comprises a material selected from the group consisting of
i) ethylenically unsaturated hydrocarbon,
ii) a polymer having a polymeric backbone, cyclic olefinic pendent
group, and linking group linking the olefinic pendent group to the
polymeric backbone,
iii) a copolymer of ethylene and a strained, cyclic alkylene, and
iv) ethylene/vinyl aralkyl copolymer.

10. The film of claim 8 comprising:
a) a first layer comprising a polymer having an oxygen transmis- sion rate of no more than 100 cc/m2/24hr at 25°C, 0% RH, 1 atm
(ASTM D 3985); and
b) a second layer comprising
i) an organic oxygen scavenger,
ii) a transition metal catalyst, and
iii) a blend of at least two of
(a) 1 ,3,5-tris(4-benzoylphenyl)benzene,
(b) thioxanthone derivative,
(c) acyl phenylphosphineoxide derivative, and
(d) diphenyl sulfide derivative.

11. The film of claim 8 wherein the polymer having an oxygen transmission rate of no more than 100 cc/m2/24hr at 25°C, 0% RH, 1 atm (ASTM D 3985) comprises a material selected from the group consisting of polyester, polyvinyl alcohol, ethylene vinyl alcohol copolymer, polyethylene naphthalate, polyamide, copolyamide, polyacrylonitrile, acrylonitrile copolymer, liquid crystal polymer, SiOx, polyvinyl chloride, polyvinylidene chloride, vinylidene chloride copolymer, carbon , metal, and metal oxide.

12. The film of claim 10 comprising a third layer comprising a material se-lected from the group consisting of ethylene/alpha olefin copolymer, ethylene/vinyl acetate copolymer, ionomer resin, ethylene/ acrylic or methacrylic acid copolymer, ethylene/ acrylate or methacrylate copolymer; and low density polyethylene.

13. The film of claim 8 wherein the average oxygen scavenging rate of the film is at least 25 cc/m2/day for at least two days after the oxygen scavenging property of the film is activated.

14. The film of claim 8 wherein at least one layer of the film is cross-linked.

15. The film of claim 8 wherein the film is oriented and heat shrinkable.

16. A method of triggering an oxygen scavenger composition comprises:
a) providing an oxygen scavenger composition comprising
i) an organic oxygen scavenger,
ii) a transition metal catalyst, and
iii) a blend of at least two photoinitiators selected from
(a) 1 ,3,5-tris(4-benzoylphenyl)benzene,
(b) thioxanthone derivative,
(c) acyl phenylphosphineoxide derivative, and
(d) diphenyl sulfide derivative, and
b) subjecting the oxygen scavenger composition to a dosage of actinic radiation effective to trigger the oxygen scavenger composition.

17. The method of claim 16 wherein the actinic radiation comprises UV light.

18. The method of claim 16, wherein the UV light has a wavelength of between 200 and 400 nm.

19. The method of claim 16 wherein the oxygen scavenger composition is exposed to a source of actinic radiation at an intensity at 254 nm of between 1.0 and 30 mW/cm2.

20. The method of claim 16 wherein the oxygen scavenger composition is exposed to a source of actinic radiation at an intensity and residence time sufficient to provide said article with a dose of actinic radiation of between 300 mJ/cm2 and 1600 mJ/cm2.