Gas-barrier resin composition
View Patent ↗A resin composition includes a polymer (A) mainly containing a structural unit represented by following Formula (1): wherein m represents an integer of 2 to 10; X 1 and X 2 are each hydrogen atom, hydroxyl group or a functional group that can be converted into a hydroxyl group, wherein at least one of X 1 and X 2 is hydroxyl group or a functional group that can be converted into hydroxyl group; R 1 , R 2 and R 3 are each hydrogen atom, hydroxyl group, a functional group that can be converted into hydroxyl group, an alkyl group, an aryl group, an aralkyl group or a heteroaryl group, wherein the plural R 1 s may be the same as or different from each other; and a vinyl alcohol polymer (B).
1. A resin composition comprising:
a polymer (A) mainly comprising polymerized structural units represented by Formula (1):
wherein
m represents an integer of 2 to 10;
X 1 and X 2 are each a hydroxyl group or a functional group that can be converted into a hydroxyl group;
R 1 , R 2 and R 3 are each a hydrogen atom, a hydroxyl group, a functional group that can be converted into hydroxyl group, an alkyl group, an aryl group, an aralkyl group or a heteroaryl group,
wherein the plural R 1 s may be the same or different from each other; and
a vinyl alcohol polymer (B), wherein the vinyl alcohol polymer (B) is an ethylene vinyl alcohol copolymer having an ethylene unit content ranging from 5 to 40 percent by mole.
2. The resin composition according to claim 1 , wherein the polymer (A) comprises 50 mole % or more of the structural units of Formula (1) based on the total number of moles of all structural units in the polymer (A).
3. The resin composition according to claim 1 , wherein the resin composition has a half time of crystallization (t 1/2 ) of 2,000 seconds or less at a temperature 10° C. lower than the melting point of the polymer (A).
4. The resin composition according to claim 1 , wherein the amount of the vinyl alcohol polymer (B) in the resin composition is 0.01 to 50 parts by weight to 100 parts by weight of the polymer (A).
5. A molded article comprising the resin composition of claim 1 .
6. The resin composition according to claim 1 , wherein the polymer (A) is prepared by a process comprising
subjecting a cyclic olefin compound to ring-opening metathesis polymerization to prepare the polymer (A).
7. The resin composition according to claim 1 , wherein the polymer (A) is prepared by a process comprising
subjecting a cyclic olefin compound to ring-opening metathesis polymerization to form a precursor polymer, and
hydrogenating the precursor polymer to form the polymer (A).
8. The resin composition according to claim 1 , wherein the vinyl alcohol polymer (B) is present in an amount of 10 wt. % or less based on the total weight of the resin composition.
9. The resin composition according to claim 1 , wherein the vinyl alcohol polymer (B) is present in an amount of 1 wt. % or less based on the total weight of the resin composition.
10. The resin composition according to claim 1 , having an oxygen permeability at 90% relative humidity of 1 cc·20-μm/m 2 ·day·atm or less.
11. The resin composition according to claim 1 , wherein the polymer (A) is a hydrogenated poly(5-cyclooctene-1,2-diol).
12. The resin composition according to claim 1 , wherein the vinyl alcohol polymer (B) has a saponification degree of 99.5% or greater.
13. A packaging film comprising the resin composition according to claim 1 .
14. The resin composition according to claim 1 , wherein the polymer (A) consists of polymerized structural units of Formula (1).
15. The resin composition according to claim 1 , wherein the resin composition has a halftime of crystallization (t 1/2 ) of 1,350 seconds or less at a temperature 10° C. lower than the melting point of the polymer (A).
16. The resin composition of claim 1 , wherein the vinyl alcohol polymer (B) has an ethylene unit content of from 5 to 30% by mole.
17. The resin composition of claim 1 , wherein in Formula (I) of the polymer (A), at least one of X 1 and X 2 is a functional group that can be converted into a hydroxyl group, wherein the functional group that can be converted into a hydroxyl group is selected from a epoxy group and a hydroxyl group protected by a protecting group.
18. The resin composition of claim 17 , wherein in Formula (I) of the polymer (A), at least one of X 1 and X 2 is a hydroxyl group protected by a protecting group, and wherein the protecting group is selected from a methyl group, an ethyl group, a t-butyl group, an allyl group, a benzyl group, a phenyl group, a methoxymethyl group, a methoxyethyl group, an ethoxyethyl group, an acetyl group, a propionyl group, a benzoyl group, a methoxycarbonyl group, an ethoxycarbonyl group, a t-butoxycarbonyl group, a phenyloxycarbonyl group, a benzyloxycarbonyl group, a trimethylsilyl group and a t-butyldimethylsilyl group.
19. The resin composition of claim 1 , wherein in Formula (I) of the polymer (A), at least one of X 1 and X 2 is a hydroxyl group.