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Gas barrier coatings

A coating and gas barrier technology, used in coating, thin material processing, synthetic resin layered products, etc.

Active Publication Date: 2011-05-18
SUN CHEMICAL B V (US)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors have found that for many purposes it is desirable that the coating should have a cover as well as a substrate, and that if the gas barrier coating is sandwiched between the two films of the laminate in this way, then in Bond strength between films such as polyethylene (PE) films and coatings becomes an issue

Method used

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Examples

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Embodiment

[0038] The starting materials used to prepare these examples were:

[0039] 1. For example polyviol P-6060 from Wacker, a 7.1% (w / w) aqueous solution of silylated polyvinyl alcohol;

[0040] 2. An 8.0% (w / w) solution of Exceval AQ-4104 in a 90 / 10 blend of water / IPA, a water-soluble ethylene / vinyl alcohol copolymer;

[0041] 3. Bindzil 15 / 500, eg EKA. The anionic colloidal silica has a solid content of 15% and a specific surface area of ​​500m 2 / g, the required particle size range is 3-5nm, and the measured average particle size is about 10nm;

[0042] 4. Bindzil 30 / 360, eg EKA. The anionic colloidal silica has a solid content of 30% and a specific surface area of ​​360m 2 / g, the required particle size range is 8-20nm, and the average particle size is about 20nm;

[0043] 5. Bindzil 40 / 220, eg EKA. The anionic colloidal silica has a solid content of 40% and a specific surface area of ​​220m 2 / g, the required particle size range is 7-25nm, and the average particle size...

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Abstract

The use of a colloidal silica having a specific surface area greater than 300 m2 / g in a gas barrier coating additionally comprising polyvinyl alcohol and / or ethylene vinyl alcohol copolymer and / or a silylated derivative thereof improves wet bond strength.

Description

technical field [0001] The present invention relates to gas barrier coatings, in particular gas barrier coatings capable of blocking the passage of oxygen, which can be used to coat a wide variety of materials, especially food and beverages that need to be eliminated or limit exposure to oxygen Especially the packaging of liquids, and endow it with gas barrier properties. Background technique [0002] Synthetic plastic materials have long been used for packaging of food and other materials. In recent years, however, it has additionally been recognized that many foods and other sensitive materials benefit from being protected from atmospheric oxygen. Various multilayer laminate structures have been developed to provide barrier properties and other performance characteristics suitable for packaging purposes. These laminates can be any combination of plastic, metal or cellulosic substrates and can contain more than one layer of paint or adhesive. Laminates comprising polymer...

Claims

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Application Information

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IPC IPC(8): C09D129/04C09D143/04C08K3/34B32B27/30B32B27/08B65D77/00
CPCC08K3/36C09D143/04B32B27/08C09D129/04B32B7/12B32B23/04B32B27/06B32B27/281B32B27/302B32B27/304B32B27/308B32B27/32B32B27/34B32B27/36B32B29/002B32B2250/24B32B2255/10B32B2255/12B32B2255/20B32B2255/26B32B2264/102B32B2307/546B32B2307/718B32B2307/7244B32B2307/7246B32B2439/46B32B2439/70B32B2439/80C08K2201/008Y10T428/1383C09D7/67C08L2666/04B65D65/42B65D77/06
Inventor 德里克·罗纳德·伊尔斯利格雷厄姆·特雷弗·斯特里特
Owner SUN CHEMICAL B V (US)
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