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Preparation method of waterborne peelable protecting film composition

A protective film and composition technology, applied in the field of packaging and decoration, can solve the problems of poor peelability, low coating film strength, and single protective performance, and achieve the effects of improving dispersion, improving water resistance and mechanical properties, and avoiding particle agglomeration

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

[0024] The preparation method of water-based peelable protective film composition comprises the following steps:

[0025] 1) Add methyl ethyl ketone into the first reaction kettle filled with epoxy resin, stir and mix at a speed of 150~200r / min for 10~30min, and obtain epoxy resin-butanone solution for later use;

[0026] 2) Add isophorone diisocyanate, polypropylene glycol, polyethylene glycol, dibutyltin dilaurate, triethylamine and butanone into the second reaction kettle at room temperature, and then raise the temperature to 58~80°C, They are mixed and reacted in the second reactor until the value of -NCO% in the system does not change, and the primary product is obtained for subsequent use;

[0027] 3) Control the temperature at 80°C, add dimethylolpropionic acid to the primary product obtained in step 2) and react for 220~260 minutes; then add the epoxy resin-butanone obtained in step 1) to the second reaction kettle solution and reacted for 220~260min; then lower the t...

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Abstract

The invention discloses a preparation method of a waterborne peelable protecting film composition. 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) sequentially adding dimethylolpropionic acid and triethylamine into the primary product, so as to obtain an epoxy-modified aliphatic polyurethane emulsion; (4) adding silica sol and the aliphatic waterborne polyurethane emulsion into a third reaction kettle at the room temperature, so as to obtain a mixed emulsion; (5) adding a proper amount of acrylic copolymer sylvite and the like into a fourth reaction kettle containing distilled water, so as to obtain a mixed base solution; and (6) adding the mixed emulsion into the mixed base solution, so as to obtain the waterborne peelable protecting film composition. The protecting film composition prepared by virtue of the preparation method has excellent water tolerance, relatively strong cohesion, good peelable property and relatively high paint film strength.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of a water-based peelable protective film composition. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/20C09D5/08C09D5/16C09D7/12C09D7/06C08G18/66C08G18/58C08G18/48C08G18/24C08G18/18C09D7/47
CPCC08G18/12C08G18/18C08G18/246C08G18/4808C08K2201/011C08L2205/02C08L2205/025C08L2205/035C09D5/08C09D5/1662C09D5/1687C09D5/20C09D175/08C08L33/02C08K13/02C08K2003/2241C08K3/34C08K5/42C08K3/36C08G18/6541C08G18/6529
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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