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Coating agent and gas barrier film

A coating agent, water-based polyurethane technology, used in coatings, polyurea/polyurethane coatings, packaging items, etc., can solve problems such as poor stretchability, reduced gas barrier properties, cracks, etc., to achieve excellent gas barrier properties, use long life effect

Active Publication Date: 2018-04-24
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, although metal foil or metal vapor-deposited film is excellent in gas barrier properties, there are various problems: the content cannot be confirmed because it is opaque; due to poor stretchability, cracks occur at an elongation of several percent, and the gas barrier properties decrease. ; When discarded after use, it needs to be treated as non-combustible, etc.
[0008] Although the resin film formed of polyvinylidene chloride exhibits good gas barrier properties without humidity dependence, it contains chlorine, so it may become a source of harmful substances such as dioxins during disposal, etc. Tendency to dislike use as packaging material
[0009] Resin films made of water-soluble polymers such as non-chlorinated polyvinyl alcohol and ethylene-vinyl alcohol copolymers exhibit high gas barrier properties in low-humidity atmospheres, but the gas barrier properties are humidity-dependent and vary with humidity. The disadvantage that the gas barrier property is greatly reduced due to the rise
[0010] Compared with polyvinylidene chloride resin films and polyvinyl alcohol resin films in low-humidity atmospheres, resin films made of resins other than polyvinylidene chloride and water-soluble polymers have poor gas barrier properties
[0011] Composite films of water-soluble polymers and inorganic layered minerals have improved humidity dependence compared to resin films formed of water-soluble polymers, but the effect is not sufficient, and there is a problem that the adhesion to the substrate is lowered. question

Method used

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  • Coating agent and gas barrier film
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  • Coating agent and gas barrier film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15

[0271] First, mix the water-based polyurethane resin (A) and the water-soluble polymer (B) with the types and compounding ratios (mass %) shown in Tables 1-2, then add the inorganic layered mineral (C), and then, It was diluted with ion-exchanged water and isopropanol so that 10% by mass of the entire aqueous medium was isopropanol and the solid content concentration was 8.2% by mass. The epoxy compound (D) was added to the obtained dilution by the kind and compounding ratio (mass %) shown in Tables 1-2, and the coating agents of Examples 1-15 were prepared, respectively. Here, the compounding ratio is the ratio in terms of solid content of each component with respect to the total solid content, and the same applies below.

[0272] Using the coating agents of Examples 1 to 15 immediately after preparation (immediately after addition of the epoxy compound (D)), a gas barrier film was obtained by the following procedure.

[0273] Using a gravure printing machine, a coating agen...

Embodiment 16～29

[0302] First, mix the water-based polyurethane resin (A) and the water-soluble polymer (B) with the types and compounding ratios (mass %) shown in Tables 4 to 6, then add the inorganic layered mineral (C), and then follow 10% by mass of the entire aqueous medium was isopropanol and diluted with ion-exchanged water and isopropanol so that the solid content concentration became 8.2% by mass. The silane coupling agent (E) was added to the obtained dilution by the kind and compounding ratio (mass %) shown in Tables 4-6, and the coating agents of Examples 16-29 were prepared, respectively. Here, the compounding ratio is the ratio in terms of solid content of each component with respect to the total solid content, and the same applies below.

[0303] Using the coating agents of Examples 16 to 29 immediately after preparation (immediately after addition of the silane coupling agent (E)), a gas barrier film was obtained by the following procedure.

[0304] Using a gravure printing ma...

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Abstract

A coating agent, wherein the coating agent includes as main components an aqueous polyurethane resin (A) including a polyamine compound and a polyurethane resin having an acid group, a water-soluble polymer (B), an inorganic layered mineral (C), and a compound (D) having an epoxy group.

Description

technical field [0001] The present invention relates to a coating agent and a gas barrier film. [0002] This application claims priority based on Japanese Patent Application No. 2015-087705 for which it applied in Japan on April 22, 2015, and Japanese Patent Application No. 2015-179742 for which it applied in Japan on September 11, 2015, and uses the content here. Background technique [0003] For packaging materials used for packaging of food, pharmaceuticals, etc., it is required to block the entry of water vapor, oxygen, and other gases that degrade the contents in order to prevent the deterioration and corruption of the contents and maintain the functions and properties of the contents. properties (gas barrier). [0004] Therefore, conventionally, packaging materials having a gas barrier layer have been used for these packaging materials. [0005] Heretofore, the gas barrier layer has been provided on a substrate such as a film or paper by a sputtering method, a vapor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04B32B27/40C09D5/02C09D7/61C09D7/63C09D129/04C09D179/02
CPCB32B27/40C09D129/04C09D179/02C09D5/022C08K3/346C09D7/70C09D175/04C09D7/61C09D7/63B32B27/08B32B2255/10B32B2255/26B32B2439/70B32B2439/80
Inventor 尾村悠希神永纯一星沙耶佳
Owner TOPPAN PRINTING CO LTD