Enhanced oxygen barrier performance from modification of ethylene vinyl alcohol copolymers (EVOH)
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08G-063/48
C08G-063/00
출원번호
US-0484177
(2006-07-10)
등록번호
US-7288593
(2007-10-30)
발명자
/ 주소
Yang,Hu
Ching,Ta Yen
Cai,Gangfeng
출원인 / 주소
Cryovac, Inc.
인용정보
피인용 횟수 :
13인용 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. An oxygen barrier composition comprising 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 great
What is claimed is: 1. An oxygen barrier composition comprising 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 greater 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 oxygen barrier composition 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, q2, q3, and q4 is also hydrogen. 3. The oxygen barrier composition of claim 2, wherein Y is greater than or equal to 1, Z is greater than or equal to 1, n is 1, and q1, q2, q3, q4, and r are hydrogen. 4. The oxygen barrier composition of claim 1, further comprising a transition metal catalyst. 5. The oxygen barrier composition of claim 4, wherein the transition metal catalyst is a cobalt salt. 6. The oxygen barrier composition of claim 5, wherein the cobalt salt is selected from cobalt oleate, cobalt stearate, or cobalt neodecanoate. 7. The oxygen barrier composition of claim 1, further comprising a photoinitiator. 8. The oxygen barrier composition of claim 7, wherein the photoinitiator is selected from benzophenone derivatives containing at least two benzophenone moieties and having the formula: description="In-line Formulae" end="lead"Aa(B)bdescription="In-line Formulae" end="tail" wherein A is a bridging group selected from sulfur, oxygen, carbonyl,--SiR"2--wherein each R" is individually selected from alkyl groups containing from 1 to 12 carbon atoms, aryl groups containing 6 to 12 carbon atoms, or alkoxy groups containing from 1 to 12 carbon atoms,--NR'"--wherein R'" is an alkyl group containing 1 to 12 carbon atoms, an aryl group containing 6 to 12 carbon atoms, or hydrogen, or an organic group containing from 1 to 50 carbon atoms; a is an integer from 0 to 11; B is a substituted or unsubstituted benzophenone group; and b is an integer from 2 to 12. 9. The oxygen barrier composition of claim 8, wherein the photoinitiator is selected from dibenzoyl biphenyl, substituted dibenzoyl biphenyl, benzoylated terphenyl, substituted benzoylated terphenyl, tribenzoyl triphenylbenzene, substituted tribenzoyl triphenylbenzene, benzoylated styrene oligomer, and substituted benzoylated styrene oligomer. 10. The oxygen barrier composition of claim 1, further comprising an antioxidant. 11. The oxygen barrier composition of claim 10, 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.
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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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