Preparation method of high-stability protective coating

A high-stability coating technology, applied in the field of packaging and decoration, can solve problems such as poor peelability, low coating film strength, and single protective performance, and achieve the effects of reducing coating film shrinkage, high coating film strength, and improving appearance

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 high-stability protective coating comprises the following steps:

[0030] 1) Put the raw materials polypropylene glycol and polyethylene glycol into a drying oven for dehydration for 450~500 minutes, the drying temperature is controlled at 110~125°C, and set aside; put the raw material dimethylolpropionic acid in an oven and dry for 100~150 minutes, The drying temperature is controlled at 110~125°C, and it is ready for use; the raw materials triethylamine and butanone are dehydrated with molecular sieves for 5~7 days, and they are set aside;

[0031] 2) Add isophorone diisocyanate, dibutyltin dilaurate, polypropylene glycol, polyethylene glycol and butanone that have been dehydrated in step 1) into the first reaction kettle at room temperature, and then raise the temperature to 58 ~80°C, make them mix and react in the first reactor until the value of -NCO% in the system does not change, and obtain the primary product for later use;

[0032] 3)...

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Abstract

The invention discloses a preparation method of a high-stability protective coating. The preparation method comprises the following processes: (1) dewatering and drying raw materials; (2) adding isophorone diisocyanate and the like into a first reaction kettle at the room temperature to obtain a primary product; (3) adding dimethylolpropionic acid into the primary product, and then carrying out reduced pressure distillation to obtain a secondary product; (4) preparing aliphatic waterborne polyurethane emulsion; (5) preparing modified silica sol; (6) adding the aliphatic waterborne polyurethane emulsion and the modified silica sol into a third reaction kettle at the room temperature to obtain mixed emulsion; (7) adding right amount of acrylic copolymer potassium salt and the like into a fourth reaction kettle filled with distilled water to obtain a mixed base solution; (8) adding the mixed emulsion into the mixed base solution to obtain the high-stability protective coating. The high-stability protective coating prepared by the method has stronger cohesion, good strippable property, higher coating strength, better safety and environmental protection performance and higher stability.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of a high-stability protective coating. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/34C08G18/75C09D175/08C09D7/12
CPCC08G18/12C08G18/348C08G18/4808C08G18/4825C08G18/4833C08G18/6692C08G18/755C08L2205/02C08L2205/035C09D7/61C09D7/62C09D7/63C09D7/65C09D175/08
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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