Oxygen absorptive resin composition
AssigneeKuraray Co., Ltd.
InventorsShinji Tai, Hiroyuki Shimo, Masakazu Nakaya, Hideo Takamatsu, Mizuho Maeda
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Abstract
The oxygen absorptive resin composition of the present invention includes: a thermoplastic resin (a) having carbon-carbon double bonds; a gas barrier resin (b) having an oxygen transmission rate of 500 ml·20 μm/m2·day·atm or less (20° C. 65% RH); and a transition metal salt (c). This resin composition and molded articles formed using the resin composition effectively absorb and scavenge oxygen when used to package products susceptible to degradation by oxygen, such as foods and drinks.
Claims30
An oxygen absorptive resin composition comprising:
- a thermoplastic resin (a) having carbon-carbon double bonds;
- a gas barrier resin (b) having an oxygen transmission rate of 500 ml·20 μm/m2·day·atm or less (20° C. 65% RH) ;
- and a transition metal salt (c).
An oxygen absorptive resin composition comprising:
- a thermoplastic resin (a) having carbon-carbon double bonds;
- and a gas barrier resin (b) having an oxygen transmission rate of 500 ml·20 μm/m2·day·atm or less (20° C. 65% RH), wherein the oxygen absorption rate is 0.01 ml/m2·day or more.
An oxygen absorptive resin composition comprising:
- a thermoplastic resin (a) having a number-average molecular weight in the range of 1000 to 500000 and having at least one kind of a structural unit represented by formula (I):
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- [wherein R1 denotes an alkyl group having 1 to 10 carbon atoms, an aryl group, an alkylaryl group, or an alkoxy group;
- R2 and R3 denote independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a substituted aryl group or a non-substituted aryl group, —COOR4, —OCOR5, a cyano group, or a halogen atom;
- and R4 and R5 denote independently an alkyl group having 1 to 10 carbon atoms, an aryl group, an alkylaryl group, or an alkoxy group], wherein the carbon-carbon double bonds in said structural unit in the resin (a) is contained in an amount of 0.0001 eq/g or more;
- and a transition metal salt (c) in an amount of 1 to 10000 ppm in terms of the metal element.
An oxygen absorptive thermoplastic resin having a number-average molecular weight in the range of 1000 to 500000, having at least one kind of structural units represented by formula (I):
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- [wherein R1 denotes an alkyl group having 1 to 10 carbon atoms, an aryl group, an alkylaryl group, or an alkoxy group;
- R2 and R3 denote independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a substituted aryl group or a non-substituted aryl group, —COOR4, —OCOR5, a cyano group, or a halogen atom;
- and R4 and R5 denote independently an alkyl group having 1 to 10 carbon atoms, an aryl group, an alkylaryl group, or an alkoxy group], wherein the carbon-carbon double bonds in said structural unit in the resin (a) is contained in an amount of 0.0001 eq/g or more, and having an oxygen absorption rate of 0.01 ml/m2·day or more.
Dependencies are inferred from the claim text.