Gas-barrier resin composition

Abstract

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 hydrogen atom, a 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 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).    
   
   
       2 . The resin composition according to  claim 1 , wherein the polymer (A) comprises 50 mol % or more of polymerized structural units of formula (1).  
   
   
       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 obtained by a ring opening metathesis polymerization of a cyclic olefin.  
   
   
       7 . The resin composition according to  claim 1 , wherein the polymer (A) is a hydrogenated product of a ring opening metathesis polymerization of a cyclic olefin.  
   
   
       8 . The resin composition according to  claim 1 , wherein the vinyl alcohol polymer (B) is present in an amount of from 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 , wherein the vinyl alcohol polymer (B) comprises polymerized ethylene units in an amount of 50% by mole or less.  
   
   
       11 . The resin composition according to  claim 1 , wherein the vinyl alcohol polymer (B) comprises polymerized ethylene units in an amount of 40% by mole or less.  
   
   
       12 . The resin composition according to  claim 1 , having an oxygen permeability of 1 cc·20-μm/m 2 ·day·atm or less.  
   
   
       13 . The resin composition according to  claim 1 , wherein the polymer (A) is a hydrogenated poly(5-cyclooctene-1,2-diol).  
   
   
       14 . The resin composition according to  claim 1 , wherein the vinyl alcohol polymer (B) has a saponification degree of 99.5% or greater.  
   
   
       15 . A packaging film comprising the resin composition according to  claim 1 .  
   
   
       16 . The resin composition according to  claim 1 , wherein the polymer (A) consists of polymerized structural units of formula (1).  
   
   
       17 . The resin composition according to  claim 1 , wherein the resin composition has a half time of crystallization (t 1/2 ) of 1,350 seconds or less at a temperature 110° C. lower than the melting point of the polymer (A).  
   
   
       18 . The resin composition according to  claim 1 , wherein each of X 1  and X 2  are a hydroxyl group or a functional group that can be converted into a hydroxyl group.