Flexible barrier films containing cyclic olefins

Patent metadata

Field	Value
Publication number	US-10335308-B2
Application number	US-201214367275-A
Country	US
Kind code	B2
Filing date	Dec 13, 2012
Priority date	Dec 22, 2011
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

Various polymeric barrier compositions are described which when formed into films, are useful in reducing transmission of odors. The films can be incorporated into a wide range of products such as multilayer barrier films used in medical applications and particularly in ostomy appliances. In certain versions, the films include blends of amorphous cyclic olefin copolymers and semi-crystalline cyclic olefin copolymers.

First claim

What is claimed is:

1. A multilayer barrier film comprising:
at least one layer including a blend of cyclic olefin copolymers (COC), wherein the blend includes a semi-crystalline COC and a norbornene COC, wherein a total norbornene concentration of the norbornene COC in the at least one layer is from about 12% to about 60% by mole based upon the total moles of COCs in the layer; and
a secondary barrier layer including ethylene vinyl alcohol (EVOH);
wherein the semi-crystalline cyclic olefin copolymer has a glass transition temperature of from about −20° C. to about 20° C.

2. The multilayer barrier film of claim 1 , wherein the total norbornene concentration of the norbornene COC in the at least one layer is from about 15% to about 55% based upon the total moles of COCs in the layer.

3. The multilayer barrier film of claim 1 , wherein the at least one layer includes (i) a first layer including a semi-crystalline cyclic olefin copolymer (COC), and (ii) a second layer including a semi-crystalline cyclic olefin copolymer.

4. The multilayer barrier film of claim 3 , wherein the semi-crystalline cyclic olefin copolymer in the first layer is the same as the semi-crystalline cyclic olefin copolymer in the second layer.

5. The multilayer barrier film of claim 1 , wherein the ethylene vinyl alcohol has an ethylene content of from about 25% to about 50% by mole.

6. The multilayer barrier film of claim 5 , wherein the ethylene vinyl alcohol has an ethylene content of from about 32% to about 48% by mole.

7. The multilayer barrier film of claim 6 , wherein the ethylene vinyl alcohol has an ethylene content of from about 34% to about 48% by mole.

8. The multilayer barrier film of claim 1 , wherein the at least one layer including the semi-crystalline cyclic olefin copolymer also includes at least one amorphous cyclic olefin copolymer.

9. A multilayer barrier film comprising:
at least one layer including a blend of cyclic olefin copolymers (COC), wherein the blend inclues a semi-crystalline COC and a norbornene COC, wherein a total norbornene concentration of the norbornene COC in the at least one layer is from about 12% to about 60% by mole based upon the total moles of COCs in the layer; and
a secondary barrier layer including ethylene vinyl alcohol (EVOH); and
at least one flexible support layer including one or more polymers selected from the group consisting of styrenic elastomers, polyolefins, and polyolefin elastomers and combinations thereof;
wherein the one or more polymers has a density of from about 0.75 to about 1.10 g/cm 3 .

10. The multilayer barrier film of claim 9 , wherein the one or more polymers has a density of from about 0.85 to about 1.01 g/cm 3 .

11. The multilayer barrier film of claim 10 , wherein the density is from about 0.860 to about 0.95 g/cm 3 .

12. The multilayer barrier film of claim 9 , wherein the one or more polymers has a melt flow index of from about 0.1 to about 1,000 g/10 min.

13. The multilayer barrier film of claim 12 , wherein the one or more polymers has a melt flow index from about 0.5 to about 100 g/10 min.

14. The multilayer barrier film of claim 1 , further comprising:
an inner antimicrobial layer including at least one antimicrobial agent.

15. An article comprising the multilayer barrier film of claim 1 .

16. The article of claim 15 , wherein the article is an ostomy pouch.

17. A multilayer barrier film comprising:
at least one layer including semi-crystalline cyclic olefin copolymer (COC) having a melting temperature (Tm) of from about 70° C. to about 120° C., a glass transition temperature (Tg) of from about −20° C. to about 20° C. and a norbornene COC, wherein a norbornene content of the norbornene COC in the at least one layer is from about 12% to about 60% by mole based upon the total moles of COCs in the layer.

18. The multilayer barrier film of claim 17 , wherein the at least one layer includes (i) a first layer including a semi-crystalline cyclic olefin copolymer (COC), and (ii) a second layer including a semi-crystalline cyclic olefin copolymer.

19. The multilayer barrier film of claim 18 , wherein the semi-crystalline cyclic olefin copolymer in the first layer is the same as the semi-crystalline cyclic olefin copolymer in the second layer.

20. The multilayer barrier film of claim 17 , further comprising:
a secondary barrier layer including ethylene vinyl alcohol (EVOH).

21. The multilayer barrier film of claim 17 , wherein the ethylene vinyl alcohol has an ethylene content of from about 25% to about 50% by mole.

22. The multilayer barrier film of claim 17 , wherein the ethylene vinyl alcohol has an ethylene content of from about 32% to about 48% by mole.

23. The multilayer barrier film of claim 17 , wherein the ethylene vinyl alcohol has an ethylene content of from about 34% to about 48% by mole.

24. The multilayer barrier film of claim 17 , wherein the at least one layer including the semi-crystalline cyclic olefin copolymer also includes at least one amorphous cyclic olefin copolymer.

25. The multilayer barrier film of claim 17 , further comprising:
at least one flexible support layer including one or more polymers selected from the group consisting of styrenic elastomers, polyolefins, and polyolefin elastomers and combinations thereof.

26. The multilayer barrier film of claim 25 , wherein the one or more polymers has a density of from about 0.75 to about 1.10 g/cm 3 .

27. The multilayer barrier film of claim 26 , wherein the one or more polymers has a density of from about 0.85 to about 1.01 g/cm 3 .

28. The multilayer barrier film of claim 27 , wherein the density is from about 0.860 to about 0.95 g/cm 3 .

29. The multilayer barrier film of claim 25 , wherein the one or more polymers has a melt flow index of from about 0.1 to about 1,000 g/10 min.

30. The multilayer barrier film of claim 29 , wherein the one or more polymers has a melt flow index of from about 0.5 to about 100 g/10 min.

31. The multilayer barrier film of claim 17 , further comprising an inner antimicrobial layer including at least one antimicrobial agent.

32. An article comprising the multilayer barrier film of claim 17 .

33. The article of claim 32 , wherein the article is an ostomy pouch.

34. A method for reducing transmission of odorous species, the method comprising:
providing at least one layer including a blend of cyclic olefin copolymers (COC), wherein the blend includes a semi-crystalline COC and a norbornene COC, wherein a total norbornene concentration of the norbornene COC in the at least one layer is from about 12% to about 60% by mole based upon the total moles of COCs in the layer;
forming a barrier film including the at least one layer including a blend of cyclic olefin copolymers (COC); and
positioning the barrier film between a source of odorous species and a user;
wherein the semi-crystalline cyclic olefin copolymer has a glass transition temperature of from about −20° C. to about 20° C.

35. The method of claim 34 , wherein the total norbornene concentration in the layer is from about 15% to about 55% by mole.

36. The method of claim 34 , wherein the odorous species is selected from the group consisting of skatole and hydrogen sulfide.

Assignees

• Avery Dennison Corp

Inventors

• Pham Hoang T
• Ghiam Farid F
• Laney Thomas

Classifications

• B32B2439/46

  Bags · CPC title

• B32B7/02

  Physical, chemical or physicochemical properties · CPC title

• Y10T428/31938

  Polymer of monoethylenically unsaturated hydrocarbon · CPC title

• B32B2250/246

  All polymers belonging to those covered by groups B32B27/32 and B32B27/30 · CPC title

• B32B27/325

  comprising polycycloolefins · CPC title