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Preparation method of strippable coating for protection

A coating and product technology, applied in the field of preparation of protective peelable coatings, can solve the problems of low coating film strength, single protective performance, poor peelability, etc., and achieve the effects of excellent mechanical properties, improved reaction rate, and improved stability.

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
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Effect test

Embodiment 1

[0023] A preparation method for a strippable coating for protection, comprising the following steps:

[0024] 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;

[0025]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;

[0026] 3) Add silica sol and the...

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PUM

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Abstract

The invention discloses a preparation method of a strippable coating for protection. The preparation method comprises the following processes: (1) adding toluene diisocynate and the like into a first reaction kettle at the room temperature to obtain a primary product; (2) adding dimethylolpropionic acid into the primary product, and then adding triethylamine to prepare aromatic waterborne polyurethane emulsion; (3) adding silica sol and the aromatic waterborne polyurethane emulsion into a third reaction kettle at the room temperature to obtain mixed emulsion for later use; (4) 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; (5) adding the mixed emulsion into the mixed base solution to obtain the strippable coating for protection. The coating prepared by the method can be used for effectively sealing and protecting an object to be protected so as to prevent the object from being contaminated, corroded and damaged. Furthermore, the coating also has higher stability, stronger cohesion, good strippable property and higher coating strength.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of a peelable coating for protection. 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 d...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D5/20C09D7/12C08G18/66C08G18/48C08G18/34
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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