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Preparation method of protective paint coated film

A coating and coating technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of poor peelability, single protective performance, low coating film strength, etc., to reduce coating film shrinkage, improve appearance, and improve mechanical strength. Effect

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

[0029] The preparation method of protective paint coating film comprises the following steps:

[0030] 1) Add isophorone diisocyanate, polypropylene glycol, polyethylene glycol, dibutyltin dilaurate and butanone to the first reaction kettle at room temperature, and then raise the temperature to 58~80°C to make them Mix and react in the reactor until the value of -NCO% in the system does not change, and obtain the primary product for subsequent use;

[0031] 2) Control the temperature at 80°C, add dimethylol propionic acid to the primary product obtained in step 1) and react for 220~260min, then lower the temperature to 38~43°C, add triethylamine to obtain the secondary product ; Adding secondary products to the second reaction kettle filled with distilled water and dispersing the secondary products in distilled water, then adding diethylenetriamine aqueous solution to obtain aliphatic water-based polyurethane emulsion for subsequent use;

[0032] 3) Add propyltrimethoxysilane...

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Abstract

The invention discloses a preparation method of a protective paint coated film. The preparation method comprises the following steps: 1) adding isophorone diisocyanate and the like into a first reaction kettle to obtain a primary product; 2) adding dimethylolpropionic acid into the primary product, and adding triethylamine to obtain an aliphatic water-based polyurethane emulsion; 3) preparing a modified silica sol; 4) preparing a mixed emulsion; 5) 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; 6) adding the mixed emulsion into the mixed substrate to obtain a protective paint; 7) airing a plastic film, and diluting the protective paint; and 8) spraying the protective paint onto the plastic film, and airing to obtain the protective 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 protective 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 solvent-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 still have the disadvant...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C09D5/08C08G18/66C08G18/48C08G18/34C08G18/32C08G18/12
CPCC09D175/08C08G18/12C08G18/3228C08G18/348C08G18/4808C08G18/6685C08G18/6692C08L2205/035C09D5/08C09D7/61C09D7/63C09D7/65
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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