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Acrylate coating for improving oxygen barrier property of PET (Polyethylene Terephthalate) film

An acrylate and oxygen barrier technology, applied in the direction of coating, etc., can solve the problems of high brittleness, poor coating adaptability, and difficulty in dissolving the coating, and achieve the effect of increasing the interaction force and good barrier effect.

Pending Publication Date: 2022-03-18
WUXI HAITE NEW MATERIAL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Oxygen barrier property is the ability of a material to prevent oxygen penetration. The existing oxygen barrier coatings are mainly crystalline polymers. Although this type of oxygen barrier can provide better oxygen barrier performance, due to high crystallization, such coatings are common. Brittle, insoluble specific
When used as a coating, there are disadvantages such as poor coating adaptability

Method used

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  • Acrylate coating for improving oxygen barrier property of PET (Polyethylene Terephthalate) film
  • Acrylate coating for improving oxygen barrier property of PET (Polyethylene Terephthalate) film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Polymerize 25g of isobornyl methacrylate, 12.5g of butyl acrylate, 1g of maleic anhydride, 0.2g of benzoyl peroxide and 61.3g of propyl acetate to obtain an acrylate coating.

[0023] The acrylate coating is coated on the PET base film and then dried and cured.

Embodiment 2

[0025] 60g of styrene, 2.5g of ethyl acrylate, 6.5g of fumaric acid, 1g of azobisisobutyronitrile, and 30g of methyl ethyl ketone were polymerized to obtain an acrylate coating.

[0026] The acrylate coating is coated on the PET base film and then dried and cured.

Embodiment 3

[0028] 30g of methyl methacrylate, 7.5g of methyl acrylate, 20g of maleic acid, 0.5g of benzoyl peroxide, and 42g of N-methylpyrrolidone were polymerized to obtain an acrylate coating.

[0029] The acrylate coating is coated on the PET base film and then dried and cured.

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Abstract

The invention discloses an acrylate coating for improving oxygen barrier property of a PET (polyethylene terephthalate) film. The acrylate coating is prepared from the following components in percentage by weight: 25-60% of a hard monomer, 2.5-12.5% of a soft monomer, 1-20% of a functional monomer, 0.2-1% of an initiator and 30-70% of a solvent. The hard monomer provides rigidity for a coating chain segment, the soft monomer prevents the coating from cracking, the functional monomer is dicarboxylic acid, the carboxylic acid group is unstable at high temperature and can be dehydrated to form anhydride, and the inter-chain anhydride can enable a molecular chain to form a net-shaped cross-linked structure, so that on one hand, the movement of the molecular chain segment is greatly limited, and on the other hand, the molecular chain segment is prevented from cracking; on the other hand, the interaction force of molecular chain segments is increased, and gaps between the chain segments are reduced. Therefore, the thermal motion of the molecular chain segment of the coating polymer is limited, the free volume fraction is reduced, the permeation path of oxygen is reduced or blocked, and the permeability of oxygen is reduced. Therefore, a coating layer measured by the acrylate coating disclosed by the invention has a good barrier effect on oxygen.

Description

technical field [0001] The invention relates to the field of paint preparation, in particular to an acrylate paint for improving the oxygen barrier properties of PET films. Background technique [0002] Known for its excellent sealability, transparency, high temperature resistance and tensile strength, polyethylene terephthalate (PET) film can meet most packaging requirements. In recent years, PET film has become an important packaging material in the fields of food, medicine and cosmetics. Therefore, the demand for high performance and new functionalities of PET films is growing, especially oxygen barrier properties. [0003] Oxygen barrier property is the ability of a material to prevent oxygen penetration. The existing oxygen barrier coatings are mainly crystalline polymers. Although this type of oxygen barrier can provide better oxygen barrier performance, due to high crystallization, such coatings are common. Highly brittle and difficult to dissolve. When used as a p...

Claims

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Application Information

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IPC IPC(8): C09D133/10C09D125/14C09D133/12C08F212/08C08F220/14C08F220/18C08F222/06C08F222/02C08J7/048C08L67/02
CPCC08F220/1811C08F212/08C08F220/14C09D133/10C09D125/14C09D133/12C08J7/048C08J2367/02C08J2433/10C08J2425/14C08J2433/12C08F220/1804C08F222/06C08F220/1802C08F222/02C08F220/1808C08F218/08
Inventor 白永平钟文邓超殷晓芬
Owner WUXI HAITE NEW MATERIAL RES INST
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