Enhanced oxygen barrier performance from modification of ethylene vinyl alcohol copolymers (EVOH)
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-001/08
B32B-001/00
출원번호
US-0600010
(2003-06-19)
발명자
/ 주소
Yang,Hu
Ching,Ta Yen
Cai,Gangfeng
출원인 / 주소
Chevron Phillips Chemical Company LP
인용정보
피인용 횟수 :
9인용 특허 :
22
초록▼
Herein is disclosed a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group. Preferably, the modified EVOH comprises structures IV, V, and VI: wherein x is an integer greater than or equal to 1, y is an integer greater than or equal to 1, z is an integer
Herein is disclosed a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group. Preferably, the modified EVOH comprises structures IV, V, and VI: wherein x is an integer greater than or equal to 1, y is an integer greater than or equal to 1, z is an integer greater than or equal to 1, and R comprises a cycloalkenyl group. The modified EVOH is useful in oxygen barrier applications, such as a forming an oxygen barrier layer of a packaging article. Also disclosed are methods of modifying ethylene vinyl alcohol polymers, and using the modified EVOH to make packaging articles with a superior barrier to entry by atmospheric oxygen.
대표청구항▼
What is claimed is: 1. A packaging article, comprising: an oxygen barrier layer, which comprises a blend of (i) a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group and (ii) an unmodified EVOH; wherein the modified EVOH comprises structures IV, V, and VI
What is claimed is: 1. A packaging article, comprising: an oxygen barrier layer, which comprises a blend of (i) a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group and (ii) an unmodified EVOH; wherein the modified EVOH comprises structures IV, V, and VI: wherein X is an integer greater than or equal to 1, Y is an integer greater than or equal to 1, Z is an integer treater than or equal to 1, and R comprises a cycloalkenyl group; and wherein the blend comprises from about 5 wt % to about 20 wt % modified EVOH. 2. The packaging article of claim 1, wherein R has structure II: wherein q1, q2, q3, q4, and r are independently selected from hydrogen, methyl, or ethyl; m is--(CH2)n--, wherein n is an integer from 0 to 4, inclusive; and, when r is hydrogen, at least one of q1, q 2, q3, and q4 is also hydrogen. 3. The packaging article of claim 2, wherein y is greater than or equal to 1, z is greater than or equal to 1, n is 1, and q 1q2, q3, q4, and r are hydrogen. 4. The packaging article of claim 1, comprising two or more oxygen barrier layers which each comprise a blend of (i) a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group and (ii) an unmodified EVOH. 5. The packaging article of 1, further comprising a transition metal catalyst in the oxygen barrier layer or a layer adjacent to the oxygen barrier layer. 6. The packaging article of claim 5, wherein the transition metal catalyst is a cobalt salt. 7. The packaging article of claim 6, wherein the cobalt salt is selected from cobalt oleate, cobalt stearate, or cobalt neodecanoate. 8. The packaging article of claim 1, further comprising a photoinitiator in the oxygen barrier layer. 9. The packaging article of claim 1, further comprising an antioxidant in the oxygen barrier layer. 10. The packaging article of claim 9, wherein the antioxidant is selected from 2,6-di(t-butyl)-4-methylphenol(BHT), 2,2'-methylene-bis(6-t-butyl-p-cresol), triphenylphosphite, tris-(nonylphenyl)phosphite, vitamin E, tetra-bismethylene 3-(3,5-ditertbutyl-4-hydroxyphenyl)-propionate methane, or dilaurylthiodipropionate. 11. The packaging article of claim 1, further comprising a second oxygen barrier layer not comprising a modified EVOH. 12. The packaging article of claim 11, wherein the second oxygen barrier layer comprises poly(ethylene vinyl alcohol) (EVOH), polyacrylonitrile, polyvinyl chloride (PVC), poly(vinylidene dichloride), polyethylene terephthalate (PET), or polyamide. 13. The packaging article of claim 1, further comprising a structural layer. 14. The packaging article of claim 13, wherein the structural layer comprises polyethylene, low density polyethylene, very low density polyethylene, ultra-low density polyethylene, high density polyethylene, polypropylene, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), nylon, polyvinyl chloride, ethylene-vinyl acetate, ethylene-alkyl (meth)acrylates, ethylene-(meth)acrylic acid, or ethylene-(meth)acrylic acid ionomers. 15. The packaging article of claim 14, wherein the structural layer comprises PET. 16. The packaging article of claim 1, further comprising a moisture barrier layer. 17. The packaging article of claim 16, wherein the moisture barrier layer comprises polyethylene, polyethylene terephthalate (PET), or a mixture thereof. 18. The packaging article of claim 1, further comprising an oxygen scavenging layer. 19. The packaging article of claim 18, wherein the oxygen scavenging layer is a liner, coating, sealant, gasket, adhesive insert, non-adhesive insert, or fibrous mat insert in the packaging article. 20. The packaging article of claim 1, wherein the packaging article is in the form of a single layer film, a multilayer film, a single layer rigid article, or a multilayer rigid article.
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이 특허에 인용된 특허 (22)
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.
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.
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.
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