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Coating liquid with high barrier property and application thereof

A high-barrier, coating liquid technology, applied in coatings, polyester coatings, etc., can solve problems such as few applications, and achieve the effects of hydrophobicity, elimination of adsorption, and high barrier properties

Active Publication Date: 2022-05-20
苏州瀚海新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because it contains a large number of ester groups and has relatively strong moisture absorption, it is rarely used in oxygen and water resistance.

Method used

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  • Coating liquid with high barrier property and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of water-based polyester emulsion

[0026] 50 parts of water-based crystalline polyester (hydroxyl value 5 mg KOH / g, number average molecular weight 15,000) prepared by polymerization of isophthalic acid, 1,6-hexanediol and isobenzenesulfonate, 14 parts of isopropanol, deionized 35 parts of water, 1 part of emulsifier ER10, stirred evenly at 300~500RPM, and kept at 60°C for 5 hours to obtain a water-based polyester emulsion;

[0027] Preparation of coating solution

[0028] Take 40 parts of the prepared aqueous polyester emulsion, 8 parts of talc powder, 10 parts of nano-silica dispersion, 0.5 part of stabilizer nano-cellulose, 0.5 part of dispersant D-193 (purchased from BYK), 30 parts of deionized water put into the reaction kettle, disperse and stir for 4 hours at a constant temperature of 60°C and at a speed of 2000~3000RPM;

[0029] After cooling to room temperature, add 5 parts of curing agent XP-2655 (purchased from Covestro), and stir at 300-500 RP...

Embodiment 2

[0031] Compared with Example 1, the difference is that the water-based crystalline resin is prepared by polymerization of a mixture of isophthalic acid and azelaic acid, trimethylolpropane, and m-benzenesulfonate (hydroxyl value 5 mg KOH / g, number average molecular weight 25000); the amount of nucleating agent mica powder in the preparation of the coating solution is 10 parts.

Embodiment 3

[0033] Compared with Example 1, the difference is that the water-based crystalline resin is made of azelaic acid, 1,2 propylene glycol, and m-benzenesulfonate (hydroxyl value 10 mg KOH / g, number average molecular weight 10,000); solidification during the preparation of the coating solution The dosage of the agent is 10 parts, and the dosage of the nucleating agent kaolin in the coating liquid preparation is 10 parts.

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Abstract

The invention discloses a coating liquid with high barrier property and application thereof, the coating liquid comprises, by weight, 40-60 parts of a water-based polyester emulsion, 2-10 parts of a nucleating agent, 5-15 parts of a nanoparticle dispersion liquid, 0.5-1 part of a dispersant, 0.1-1 part of a stabilizer, 2-10 parts of a curing agent and 30-40 parts of deionized water, and the water-based polyester emulsion comprises water-based crystalline resin. According to the coating liquid disclosed by the invention, through matching of the water-based crystalline resin and other raw materials, uniform coating and qualified adhesive force of the coating liquid on different base materials are met, so that high-efficiency application of the coating liquid to packaging of products with high barrier requirements is realized.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and in particular relates to a coating solution with high barrier performance and its application. Background technique [0002] With the increasing attention to food and drug safety, the quality of food packaging has become the focus of attention. The damage or poor barrier properties of the packaging will lead to the growth and reproduction of bacteria, the deterioration of oil, the volatilization of water vapor, etc., resulting in the deterioration of food and medicine. In order to avoid spoilage of food and medicine in the package, prolong the shelf life, and ensure the high quality of the product, it is required that the packaging materials used for food and medicine can effectively isolate the external oxygen, water vapor, etc., and reduce the damage caused by poor barrier properties. resulting in food spoilage. In order to achieve excellent oxygen barrier and water barri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D7/61C09D7/65C09D7/63
CPCC09D167/00C09D7/61C09D7/65C09D7/63C08K2201/011C08L2201/14C08L1/02C08K3/34C08K3/36C08K5/29
Inventor 宁珅王开吉代起望马培培
Owner 苏州瀚海新材料有限公司
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