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Preparation method of waterborne peelable coating

A water-based coating technology, applied in the field of packaging and decoration, can solve the problems of poor peelability, low coating film strength, and single protective performance

Inactive Publication Date: 2017-06-09
重庆市共赢包装制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing water-based protective coatings still have the disadvantages of low film strength, poor peelability and single protective performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of water-based peelable coating includes the following steps:

[0027] 1) Add methyl ethyl ketone to the first reactor containing epoxy resin, stir and mix for 10-30 minutes at a speed of 150 to 200 r / min to obtain epoxy methyl ethyl ketone solution for use;

[0028] 2) Add isophorone diisocyanate, polypropylene glycol, polyethylene glycol, dibutyltin dilaurate, triethylamine and methyl ethyl ketone to the second reactor at room temperature, and then raise the temperature to 58~80℃, They are mixed and reacted in the second reactor until the -NCO% value in the system no longer changes, and primary products are obtained for use;

[0029] 3) Control the temperature at 80℃, add dimethylolpropionic acid to the primary product obtained in step 2) and react for 220~260min; then add the epoxy resin-butanone obtained in step 1) to the second reactor The solution is reacted for 220~260min; then the temperature is reduced to 38~43℃, and triethylamine is added to o...

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Abstract

The invention discloses a preparation method of a waterborne peelable coating. The preparation method comprises the following procedures: (1) preparing an epoxy resin-butanone solution; (2) adding isophorone diisocyanate and the like into a first reaction kettle at the room temperature, so as to obtain a primary product; (3) adding dimethylolpropionic acid and the like into the primary product, so as to obtain an epoxy-modified polyurethane emulsion; (4) adding silica sol and the epoxy-modified polyurethane emulsion into a third reaction kettle, so as to obtain a mixed emulsion; (5) adding a proper amount of acrylic copolymer sylvite and the like into a fourth reaction kettle, so as to obtain a mixed base solution; (6) adding the mixed emulsion into the mixed base solution, so as to obtain the waterborne peelable coating; (7) carrying out wiping and air-drying on a plastic film, and diluting the waterborne peelable coating; (8) spraying waterborne peelable coating to the plastic film, and airing, so as to obtain a waterborne peelable coating paint film. The paint film prepared by virtue of the preparation method can be used for conveniently testing the properties such as tensile property, corrosion resistance, vapor permeability and peel strength of the coating.

Description

Technical field [0001] The invention relates to the field of packaging and decoration, in particular to a method for preparing water-based peelable paint. Background technique [0002] In order to prevent the materials or semi-products exposed to the atmosphere from being polluted, corroded and damaged, and to prolong their service life, they are usually coated with a good protective and peelable paint on their surfaces for effective and temporary treatment. Archive protection. In this way, it can not only isolate the outside air, salt spray, and microorganisms from intruding to achieve the anti-corrosion effect; but also achieve the cleaning and decontamination effect by adsorbing pollutants. Compared with solvent-based protective coatings, water-based protective coatings are more safe and environmentally friendly, so they are widely used in product packaging and decoration fields. However, the existing water-based protective coatings still have the disadvantages of low film ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C09D5/20C08G18/66C08G18/48C08G18/58C08G18/34C08G18/32C08G18/12
CPCC09D175/08C08G18/12C08G18/3228C08G18/348C08G18/4045C08G18/6685C08G18/6692C08L2205/035C09D5/20C09D7/61C09D7/63C09D7/65
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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