Water-based high-barrier coating liquid and production method thereof

A coating liquid, high barrier technology, applied in the direction of coating, can solve problems such as poor dispersibility, avoid secondary agglomeration, improve compactness, and improve poor dispersibility.

Inactive Publication Date: 2019-10-08
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a kind of aqueous high barrier coating liquid, described coating liquid has excellent barrier properties to oxygen and water vapor simultaneously, and it can suppress the agglomeration of graphene itself, solves the problem of its poor dispersibility, simultaneously , using the cross-linking bond between nano-oxides and water-soluble polymers, while improving the compactness of the coating, fully exerting the synergistic effect with graphene, greatly improving the gas barrier properties

Method used

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  • Water-based high-barrier coating liquid and production method thereof
  • Water-based high-barrier coating liquid and production method thereof
  • Water-based high-barrier coating liquid and production method thereof

Examples

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preparation example Construction

[0055] First, the preparation method of polyvinyl alcohol solution A, nano-silica dispersion B and silane coupling agent hydrolyzate D is described, and the specific process includes:

[0056] Preparation of polyvinyl alcohol solution A:

[0057] Add 50 parts by weight of PVA (degree of alcoholysis 99%, degree of polymerization 2400) in 900 parts by weight of water and 50 parts by weight of methanol mixed solvent, first fully swell in a water bath at 50°C, then heat up to 95°C under stirring , stirred at constant temperature for 0.5h, after being completely dissolved and naturally cooled to room temperature, a PVA solution A with a solid content of 5.0% was obtained.

[0058] Preparation of nano-silica dispersion B:

[0059] Add 360 parts by weight TEOS (99.9% purity) to a mixed solvent of 170 parts by weight methanol and 468 parts by weight water, then add 2 parts by weight hydrochloric acid (0.1% by mass fraction) and stir at room temperature for hydrolysis and condensation...

Embodiment 1

[0063] 2.0 parts by weight of graphene aqueous solution (product model "FNG-C100", manufactured by Qualcomm New Materials, solid content of 10%) was added to 68.6 parts by weight of nano-silica dispersion B, and stirred for 1 h at normal temperature and pressure to make it Uniform dispersion; then add 19.6 parts by weight of PVA solution A to the above dispersion liquid, and then add 9.8 parts by weight of coupling agent hydrolyzate D while the above mixed solution is fully stirred, and finally add 1.0 parts by weight of The delayed crosslinking agent sodium sulfate, 0.5 parts by weight of leveling agent Silok8000 and 0.5 parts by weight of adhesion promoter Silok628 were stirred and mixed for 0.5 hours to obtain high barrier coating solution TC-1.

[0064] Use a micro-gravure coater to coat the above-mentioned TC-1 coating solution on a 12 μm PET base film on which a 30 nm thick silicon oxide coating has been deposited in such a way that the dry thickness of the coating film i...

Embodiment 2

[0066] Except that the addition amount of the graphene aqueous solution was changed to 0.5 parts by weight, other operations were the same as in Example 1 to obtain high barrier coating liquid TC-2. Using the coating solution, the same procedure as in Example 1 was carried out to obtain barrier film No. 2 with a laminated structure of an inorganic substance deposition layer and a barrier layer.

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Abstract

The invention discloses water-based high-barrier coating liquid and a production method thereof. The water-based high-barrier coating liquid comprises 0.5-15 parts of a hydroxy group-containing water-soluble polymer, 0.1-15 parts of a nanometer oxide, 0.01-10 parts of graphene, 0.01-5 parts of an organic siloxane coupling agent, 0.1-30 parts of 0.1-mol/L diluted hydrochloric acid and 30-95 parts of a solvent. According to the water-based high-barrier coating liquid and the production method thereof, nanometer oxide particles produced through a sol-gel method are used as a small-size polymerization inhibitor, and are loaded onto the surfaces of the graphene by means of physical adsorption, and polymerization among the graphene can be inhibited, so that the problem of poor dispersity of thegraphene is solved; and by using cross linking of the nanometer oxide and the water-soluble polymer, the synergistic enhanced barrier action of the graphene/polymer on gas is given full play to. Moreover, a process of the production method of the water-based high-barrier coating liquid is simple and easy to implement, and a produced film material has good mechanical performance and package printing performance at the same time, and can be applied to a wide variety of fields of medicines, food, electronic product packaging, encapsulation and the like.

Description

technical field [0001] The invention relates to a water-based high-barrier coating solution capable of packaging medicine, food and electronic products, and belongs to the technical field of thin films. Background technique [0002] In order to avoid the deterioration of the contents of the package, prolong the shelf life, and ensure the high quality of the product, it is required that the packaging materials used for food, medicine, and electronic items can effectively isolate the external oxygen, water vapor, etc., and reduce the damage caused by poor barrier properties. The intermediate loss of the product, therefore, improving the barrier properties of packaging films has become an urgent problem to be solved. [0003] In order to obtain sufficient gas barrier and water resistance, inorganic fillers such as inorganic nanoparticles or layered compounds can be dispersed in the barrier resin composition, among which graphene is the most widely used as a barrier filler added...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04C09D7/61C08J7/04C08L67/02
CPCC09D129/04C09D7/61C08K2201/011C08K2003/3045C08J2367/02C08J7/0423C08K13/02C08K3/042C08K3/36C08K3/30
Inventor 郑燕纪雪梅冯铭竹刘军虎刘贤豪陈帅
Owner CHINA LUCKY FILM CORP
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