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Preparation method of high-water-resistance packaging paint coated film

A water-resistant and coating technology, applied in the direction of coating, the device for coating liquid on the surface, etc., can solve the problems of poor peelability, single protective performance, low coating film strength, etc., to reduce the shrinkage of the coating film and improve the appearance. , the effect of high film strength

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

[0025] A method for preparing a coating film of a highly water-resistant packaging paint comprises the following steps:

[0026] 1) Add toluene diisocyanate, polypropylene glycol, dibutyltin dilaurate, triethylamine and butanone into the first reaction kettle at room temperature, and then raise the temperature to 58~70°C to make them in the first reaction kettle Mix the reaction until the value of -NCO% in the system does not change, and obtain the primary product for subsequent use;

[0027] 2) Control the temperature at 80°C, add dimethylolpropionic acid to the primary product obtained in step 1) and react for 100~130min, then lower the temperature to 38~43°C, add triethylamine to obtain the secondary product ; Add secondary products to the second reaction kettle filled with distilled water and disperse the secondary products in distilled water, then add ethylenediamine aqueous solution to prepare aromatic water-based polyurethane emulsion for subsequent use;

[0028] 3) Ad...

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PUM

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Abstract

The invention discloses a preparation method of a high-water-resistance packaging paint coated film. The preparation method comprises the following steps: 1) adding toluene diisocyanate and the like into a first reaction kettle at room temperature to obtain a primary product; 2) adding dimethylolpropionic acid into the primary product to obtain an aromatic water-based polyurethane emulsion; 3) adding a silica sol and the aromatic water-based polyurethane emulsion into a third reaction kettle to obtain a mixed emulsion; 4) adding right amounts of acrylic acid copolymer potassium salt and the like into a distilled-water-containing fourth reaction kettle to obtain a mixed substrate; 5) adding the mixed emulsion into the mixed substrate to obtain a high-water-resistance packaging paint; 6) wiping and airing the plastic film, and diluting the high-water-resistance packaging paint for later use; and 7) spraying the high-water-resistance packaging paint onto the plastic film, and airing to obtain the high-water-resistance packaging paint coated film. The coated film is convenient for testing the tensile property, corrosion resistance, moisture permeability, peel strength and other properties of the paint.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12C08G18/48C08G18/76C08G18/10C08G18/34B05D1/02
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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