UV- or heat-triggered low oxygen packaging system employing an oxidizable polymer resin and a peroxide
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09K-015/04
B32B-027/16
B29D-022/00
C02F-001/70
출원번호
US-0748529
(2000-12-22)
발명자
/ 주소
Galland, M. Stephen
Jerdee, Gary D.
Rysstad, Gunnar
Johnstone, Keith
출원인 / 주소
Chevron Phillips Chemical Company LP, Elopak Systems AG
대리인 / 주소
Williams, Morgan & Amerson P.C.
인용정보
피인용 횟수 :
3인용 특허 :
26
초록▼
Disclosed herein is a method of initiating oxygen scavenging in a packaging article comprising an oxygen scavenging polymer. The method involves (i) providing the packaging article comprising the oxygen scavenging polymer, wherein the packaging article comprises an interior surface and an exterior s
Disclosed herein is a method of initiating oxygen scavenging in a packaging article comprising an oxygen scavenging polymer. The method involves (i) providing the packaging article comprising the oxygen scavenging polymer, wherein the packaging article comprises an interior surface and an exterior surface; (ii) wetting the interior surface of the packaging article with a solution comprising a peroxide, to result in a packaging article with a wetted surface; and (iii) exposing the wetted surface to an initiating factor, to initiate oxygen scavenging by the packaging article. Typically, the initiating factor is ultraviolet light, heat, or both.
대표청구항▼
1. A method of initiating oxygen scavenging in a packaging article comprising an oxygen scavenging polymer, comprising:providing the packaging article comprising an oxygen scavenging layer comprising the oxygen scavenging polymer, wherein the packaging article comprises an interior surface and an ex
1. A method of initiating oxygen scavenging in a packaging article comprising an oxygen scavenging polymer, comprising:providing the packaging article comprising an oxygen scavenging layer comprising the oxygen scavenging polymer, wherein the packaging article comprises an interior surface and an exterior surface;wetting the interior surface of the packaging article with an aqueous solution comprising a peroxide, to result in a packaging article with a wetted surface; andexposing the wetted surface to an initiating factor comprising ultraviolet light having a wavelength between about 254 nm and about 400 nm, to initiate oxygen scavenging by the packaging article;wherein said method reduces the induction period for oxygen scavenging as compared to a method wherein the interior surface of the packaging article is not first wetted with a peroxide containing aqueous solution. 2. The method of claim 1, wherein the oxygen scavenging polymer comprises a polymeric backbone and at least one cyclic olefinic pendant group. 3. The method of claim 2, wherein the polymeric backbone is ethylenic, and the cyclic olefinic pendant group has the structure (I):wherein q 1 , q 2 , q 3 , q 4 , and r are independently selected from hydrogen, methyl, or ethyl; m is —(CH 2 ) n —, wherein n is an integer from 0 to 4, inclusive; and, when r is hydrogen, at least one of q 1 , q 2 , q 3 , and q 4 is also hydrogen. 4. The method of claim 3, wherein the oxygen scavenging polymer is ethylene/vinyl cyclohexene copolymer (EVCH). 5. The method of claim 3, wherein the oxygen scavenging polymer further comprises at least one linking group linking the backbone with the pendant group. 6. The method of claim 5, wherein the linking group is selected from n —; —(C═O)—O—(CHR) n —; —NH—(CHR) n —; —O—(C═O)—(CHR) n —; —(C═O)—NH—(CHR) n —; or —(C═O)—O—CHOH—CH 2 —O—;wherein R is hydrogen, methyl, ethyl, propyl, or butyl; and n is an integer from 1 to 12, inclusive. 7. The method of claim 6, wherein the oxygen scavenging polymer is selected from ethylene/methyl acrylate/cyclohexenyl methyl acrylate terpolymer (EMCM) or cyclohexenylmethyl acrylate (CHAA) homopolymer. 8. The method of claim 1, wherein the peroxide is hydrogen peroxide. 9. The method of claim 8, wherein the solution comprises at least about 0.5% hydrogen peroxide. 10. The method of claim 9, wherein the solution comprises at least about 30% hydrogen peroxide. 11. The method of claim 1, wherein the ultraviolet light has a wavelength of about 254 nm. 12. The method of claim 11, wherein the ultraviolet light is provided at a dosage of at least about 100 mJ/cm 2 . 13. The method of claim 12, wherein the ultraviolet light is provided at a dosage of at least about 800 mJ/cm 2 . 14. The method of claim 1, wherein the exposing step is performed for no more than about 60 sec. 15. The method of claim 1, wherein the initiating factor is heat and ultraviolet light. 16. The method of claim 15, wherein the heat is provided to bring the wetted surface to a temperature of at least about 70° C. 17. The method of claim 1, wherein the packaging article comprises a structural layer. 18. The method of claim 17, wherein the structural layer comprises polyethylene, low density polyethylene, very low density polyethylene, ultra-low density polyethylene, high density polyethylene, polyethylene terephthalate (PET), polyvinyl chloride, ethylene-vinyl acetate, ethylene-alkyl(meth)acrylates, ethylene-(meth)acrylic acid, ethylene-(meth)acrylic acid ionomer, or paperboard. 19. The method of claim 18, wherein the structural layer comprises PET or paperboard. 20. The method of claim 18, wherein the packaging article is in the form of a bottle or a gable-top carton. 21. The method of claim 1, wherein the packaging article further comprises a transition metal catalyst. 22. The method of claim 21, wherein the transition metal catalyst is a cobalt salt, a copper salt, or a manganese salt. 23. The method of claim 22, wherein the transition metal catalyst is a cobalt salt selected from cobalt oleate, cobalt stearate, or cobalt neodecanoate. 24. The method of claim 1, wherein the packaging article comprises an oxygen barrier layer on the exterior surface and an oxygen scavenging layer that comprises the oxygen scavenging polymer. 25. The method of claim 24, wherein the wetting step comprises spraying the interior surface of the packaging article with the solution comprising the peroxide. 26. The method of claim 24, wherein the oxygen scavenging layer is a food-contact layer on the interior surface of the packaging article. 27. The method of claim 24, wherein the packaging article further comprises a food contact layer on the interior surface, and wherein the oxygen scavenging layer is located between the food contact layer and the oxygen barrier layer. 28. The method of claim 27, wherein the food contact layer comprises low density polyethylene (LDPE). 29. The method of claim 28, wherein the thickness of the food contact layer is less than about 1 mil. 30. The method of claim 24, wherein the oxygen barrier layer comprises at least one polymer selected from poly(ethylene vinyl alcohol), polyacrylonitrile, polyvinyl chloride, poly(vinylidene dichloride), polyethylene terephthalate (PET), silica, polyamides, aluminum foil, or mixtures thereof. 31. The method of claim 30, wherein the polymer is PET.
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이 특허에 인용된 특허 (26)
Young Donald C. (Fullerton CA), Acid catalyzed reactions.
Ching Ta Yen ; Katsumoto Kiyoshi ; Current Steven P. ; Theard Leslie P., Compositions having ethylenic backbone and benzylic allylic or ether-containing side-chains oxygen scavenging compositi.
Ching Ta Yen ; Katsumoto Kiyoshi ; Current Steven P. ; Theard Leslie P., Compositions having ethylenic backbone and benzylic, allylic, or ether-containing side-chains, oxygen scavenging compo.
Ching Ta Y. (Novato CA) Katsumoto Kiyoshi (Cerrito CA) Current Steven P. (Novato CA) Theard Leslie P. (Houston TX), Compositions having ethylenic backbone and benzylic, allylic, or ether-containing side-chains, oxygen scavenging composi.
Speer Drew V. (Columbia MD) Roberts William P. (Columbia MD) Morgan Charles R. (Brookeville MD) Ebner Cynthia L. (Mt. Airy MD), Compositions, articles & methods for scavenging oxygen.
Barnabeo Austin E. (Bridgewater NJ) Keogh Michael J. (Bridgewater NJ), Curable compositions, based on alkylene-alkyl acrylate copolymers, containing preformed, reactive organo titanate cataly.
Becraft Michael L. ; Ecoff Martin J. ; Sylvia R. Karina ; Thomas Jeffrey A., Method and apparatus for treating an article containing an oxidizable organic compound.
Speer Drew V. (Columbia MD) Roberts William P. (Columbia MD) Morgan Charles R. (Brookeville MD), Methods and compositions for oxygen scavenging by a rigid semi-rigid article.
Dunn Joseph E. (Rancho La Costa CA) Clark R. Wayne (Del Mar CA) Asmus John F. (LaJolla CA) Pearlman Jay S. (Rancho Palos Verde CA) Boyer Keith (Los Alamos NM) Painchaud Francois (Charlesbourg CA CAX), Methods for presevation of foodstuffs.
Katsumoto Kiyoshi (El Cerrito CA) Ching Ta Yen (Novato CA) Theard Leslie P. (Houston TX) Current Steven P. (Novato CA), Multi-component oxygen scavenger system useful in film packaging.
Speer Drew V. (Columbia MD) Roberts William P. (Columbia MD) Morgan Charles R. (Brookeville MD) Ebner Cynthia L. (Mt. Airy MD), Packaging articles suitable for scavenging oxygen.
Speer,Drew Ve; Edwards,Frank Bryan; Beckwith,Scott William; Rivett,Janet; Kennedy,Thomas Duane, Method of triggering a film containing an oxygen scavenger.
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