Gas barrier film

• US 20050084686A1
• Filed: 10/13/2004
• Published: 04/21/2005
• Est. Priority Date: 10/15/2003
• Status: Abandoned Application

• Current Assignee: Futamura Kagaku Kogyo Kabushiki Kaisha
• Original Assignee: Futamura Kagaku Kogyo Kabushiki Kaisha
• Inventors: Imaizumi, Takuzo
• Application Number:
  US10/962,576
• Publication Number:
  US 20050084686A1
• Time in Patent Office: Days
• US Class Current: 428/425.500
• CPC Class Codes: C08G 18/0823 containing carboxylate salt groups or groups forming them
• CPC Class Codes: C08G 18/12 using two or more compounds having active hydrogen in the first polymerisation step
• CPC Class Codes: C08G 18/3271 Hydroxyamines
• CPC Class Codes: C08G 18/348 Hydroxycarboxylic acids
• CPC Class Codes: C08G 18/724 Combination of aromatic polyisocyanates with (cyclo)aliphatic polyisocyanates
• CPC Class Codes: C08G 18/757 containing at least two isocyanate or isothiocyanate groups linked to the cycloaliphatic ring by means of an aliphatic group
• CPC Class Codes: C08G 18/758 containing two or more cycloaliphatic rings
• CPC Class Codes: C08G 18/7642 containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring
• CPC Class Codes: C08J 2475/00 Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/048 Forming gas barrier coatings
• CPC Class Codes: C08J 7/052 Forming heat-sealable coatings
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: Y10T 428/31583 Nitrile monomer type [polyacrylonitrile, etc.]
• CPC Class Codes: Y10T 428/31598 Next to silicon-containing [silicone, cement, etc.] layer

Abstract

A gas barrier film exhibiting a superior gas barrier property and simultaneously provided with an excellent coating property, a polyurethane resin obtained by adding a polyisocyanate compound containing at least one of an aromatic, aromatic aliphatic, and alicyclic polyisocyanate in an amount of at least 30 wt % of the total polyisocyanate compound, a polyhydroxyalkane carboxylic acid, as necessary a polyol compound containing a C₂ to C₈ polyol ingredient in an amount of at least 90 wt % of the total polyol compound, a chain extender selected from the group comprised of at least one of ammonia, an ammonia derivative, diamine, hydrazine, and a hydrazine derivative, and a neutralization agent and having a total of a urethane group concentration and urea group concentration of 25 to 60 wt % and an acid value of 5 to 100 mgKOH·g⁻¹, a swellable inorganic layer compound, and a polyamine compound having an amine value of 100 to 1900 mgKOH·g⁻¹ formed on one side or both sides of a thermoplastic resin base.

Claims

1. A gas barrier film comprised of a gas barrier layer having:

a polyurethane resin having a total of a urethane group concentration and urea group concentration of 25 to 60 wt % and an acid value of 5 to 100 mgKOH·

g<sup>−

1</sup>,

a swellable inorganic layer compound, and

a polyamine compound having an amine value of 100 to 1900 mgKOH·

g<sup>−

1</sup>

formed on one side or both sides of a thermoplastic resin base.

2. A gas barrier film as set forth in claim 1, wherein said polyurethane resin is obtained by adding:

a polyisocyanate compound containing at least one of an aromatic, aromatic aliphatic, and alicyclic polyisocyanate in an amount of at least 30 wt % of the total polyisocyanate compound,

a polyhydroxyalkane carboxylic acid,

as necessary a polyol compound containing a C₂ to C₈ polyol ingredient in an amount of at least 90 wt % of the total polyol compound,

a chain extender selected from the group comprised of at least one of ammonia, an ammonia derivative, diamine, hydrazine, and a hydrazine derivative, and

a neutralization agent.

3. A gas barrier film as set forth in claim 2, wherein said polyisocyanate compound is at least one of xylylene diisocyanate and hydrated xylylene diisocyanate.

4. A gas barrier film as set forth in claim 1, wherein said swellable inorganic layer compound is at least one of water swellable mica and montmorillonite.

5. A gas barrier film as set forth in claim 1, wherein a ratio of mixture of said polyurethane resin and said swellable inorganic layer compound is 100/1 to 100/100 in solids content ratio.

6. A gas barrier film as set forth in claim 1, wherein a ratio of mixture of said polyurethane resin and said polyamine compound is 10/1 to 1/10 in terms of an equivalent ratio of acid groups and basic nitrogen atoms.

7. A gas barrier film as set forth in claim 1, wherein in measurement based on the following method of measurement of the residual amount of said gas barrier film per unit area, the residual amount of volatile basic compound is not more than 1 mg·

m<sup>−

2</sup>;

(Method of measurement of residual amount;

Seal gas barrier film equivalent to 0.04 m² in a 20 mL inside volume glass vial, heat at 120°

C. for 15 minutes, then sample a fixed amount of gas in said glass vial and fill it in a gas chromatography system. Suitably, fill this volatile basic compound in the same gas chromatography system as an indicator while changing its concentration. Calculate the residual amount (mg·

m<sup>−

2</sup>) of the volatile basic compound contained per square meter of gas barrier film from the indicator of the volatile basic compound (retention time).)

8. A gas barrier film as set forth in claim 1, wherein said gas barrier layer is printed with a water-based ink.

9. A gas barrier film as set forth in claim 1, wherein said gas barrier film is coated with a water-based heat sealing agent.