Oxygen-absorbing film and oxygen-absorbing adhesive agent resin composition

Patent metadata

Field	Value
Publication number	US-10774248-B2
Application number	US-201414759420-A
Country	US
Kind code	B2
Filing date	Jan 20, 2014
Priority date	Jan 18, 2013
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

An oxygen-absorbing film having an oxygen-absorbing adhesive agent layer comprising an oxygen-absorbing adhesive agent resin composition, wherein the oxygen-absorbing adhesive agent layer has at least two glass transition temperatures, and wherein the lowest glass transition temperature among the glass transition temperatures is lower than 0° C. The oxygen-absorbing adhesive agent resin composition preferably comprises: (A) an oxygen-absorbing polyester resin having a glass transition temperature of −20 to 10° C. made from a tetrahydrophthalic acid, a derivative thereof, a tetrahydrophthalic anhydride, or a derivative thereof, and (B) a saturated polyester resin having a glass transition temperature of −10° C. or lower that is a polyester resin containing substantially no carbon-carbon double bond group, and can be obtained by, for example, polycondensation of a dicarboxylic acid component, a diol component, and a hydroxycarboxylic acid component.

First claim

The invention claimed is:

1. A cured oxygen-absorbing adhesive resin composition comprising:
an oxygen-absorbing polyester-based resin (A) containing a functional group or linking group having a reactivity with oxygen and having a glass transition temperature of

−20° C. to 10° C., wherein the oxygen-absorbing polyester-based resin (A) is made from a tetrahydrophthalic acid, a derivative thereof, a tetrahydrophthalic anhydride, or a derivative thereof, and a diol component;
a saturated polyester resin (B) containing a structural unit derived from a diol component and a structural unit derived from a dicarboxylic acid component selected from the group consisting of adipic acid, sebacic acid, isophthalic acid, and combinations thereof, and having a glass transition temperature of −10° C. or less; and
an isocyanate-based curing agent in an amount of 3 phr to 15 phr, wherein:
the saturated polyester resin (B) is modified with a terminal alkyl group by using a monoalcohol or a fatty acid,
a ratio A/B of the oxygen-absorbing polyester-based resin (A) to the saturated polyester resin (B) is 1.5 to 9,
the glass transition temperature of the saturated polyester resin (B) is lower than the glass transition temperature of the oxygen-absorbing polyester-based resin (A), and
the oxygen-absorbing adhesive resin composition has separate phases with glass transition temperatures of at least the oxygen-absorbing polyester-based resin (A) and the saturated polyester resin (B).

2. The oxygen-absorbing adhesive resin composition according to claim 1 , further comprising a transition metal catalyst.

3. The oxygen-absorbing adhesive resin composition according to claim 1 , wherein the saturated polyester resin (B) further comprises a structural unit derived from a hydroxycarboxylic acid component.

4. The oxygen-absorbing adhesive resin composition according to claim 1 , wherein the saturated polyester resin (B) has an iodine value of 3 g/100 g or less measured in accordance with JIS K 0070.

5. The oxygen-absorbing adhesive resin composition according to claim 1 , wherein the saturated polyester resin (B) has an iodine value of 1 g/100 g or less measured in accordance with JIS K 0070.

6. A cured oxygen-absorbing adhesive resin composition comprising:
an oxygen-absorbing polyester-based resin (A) containing a functional group or linking group having a reactivity with oxygen and having a glass transition temperature of −20° C. to 10° C., wherein the oxygen-absorbing polyester-based resin (A) is made from a tetrahydrophthalic acid, a derivative thereof, a tetrahydrophthalic anhydride, or a derivative thereof, and a diol component;
a saturated polyester resin (B) containing a structural unit derived from a diol component and a structural unit derived from a dicarboxylic acid component selected from the group consisting of adipic acid, sebacic acid, isophthalic acid, and combinations thereof, and having a glass transition temperature of −10° C. or less; and
an isocyanate-based curing agent in an amount of 3 phr to 15 phr,
wherein:
the saturated polyester resin (B) is modified with a terminal alkyl group by using a monoalcohol or a fatty acid,
a ratio A/B of the oxygen-absorbing polyester-based resin (A) to the saturated polyester resin (B) is 1.5 to 9,
the glass transition temperature of the saturated polyester resin (B) is lower than the glass transition temperature of the oxygen-absorbing polyester-based resin (A), and
the oxygen-absorbing adhesive resin composition has a single-phase compatible system when the oxygen absorption starts, but has separated glass transition temperatures of two or more components due to reaction-induced phase separation following an oxygen absorption reaction.

Assignees

• Toyo Seikan Group Holdings Ltd

Inventors

• Tadokoro Yoichi
• Ishizaki Yoichi
• Ohta Yoshihiro

Classifications

• C09J175/04 Primary

  Polyurethanes · CPC title

• C09J167/06

  Unsaturated polyesters having carbon-to-carbon unsaturation · CPC title

• C09J11/08

  Macromolecular additives · CPC title

• C08L67/00

  Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers · CPC title

• C09J7/20

  characterised by their carriers · CPC title