Preparation method of coating paint film containing modified silica sol

A silica sol and modification technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of poor peelability, single protective performance, and low strength of the coating film, so as to reduce the shrinkage of the coating film, improve the appearance, and increase the 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

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Problems solved by technology

However, the existing water-based protective coatings still have the disadvant

Method used

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Embodiment 1

[0029] The preparation method of the paint coating film containing modified silica sol comprises the following steps:

[0030] 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;

[0031] 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;

[0032] 3) Add ...

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Abstract

The invention discloses a preparation method of a coating paint film containing modified silica sol. The preparation method comprises the following procedures: (1) adding toluene diisocynate and the like into a first reaction kettle, so as to obtain a primary product; (2) adding dimethylolpropionic acid and the like into the primary product, so as to obtain an aromatic waterborne polyurethane emulsion; (3) preparing modified silica sol; (4) adding the modified silica sol and the aromatic waterborne polyurethane emulsion into a third reaction kettle, so as to obtain a mixed emulsion; (5) adding a proper amount of acrylic copolymer sylvite and the like into the fourth reaction kettle containing distilled water, so as to obtain a mixed base solution; (6) adding the mixed emulsion into the mixed base solution, so as to obtain a coating containing the modified silica gel; (7) carrying out air-drying on a plastic film, and diluting the coating containing the modified silica gel; and (8) spraying the coating containing the modified silica gel to the plastic film, so as to obtain the coating paint film containing the modified silica sol. The paint film prepared by virtue of the preparation method can be used for conveniently testing the properties such as tensile property, corrosion resistance, vapor permeability and peel strength of the coating containing the modified silica sol.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a method for preparing a paint coating film containing modified silica sol. 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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IPC IPC(8): C09D175/08C09D183/12C09D183/04C09D133/02C09D7/12C09D5/08C08G18/10C08G18/66C08G18/48C08G18/32C08G18/34
CPCC09D175/08C08G18/10C08G18/3228C08G18/348C08G18/48C08G18/6685C08G18/6692C08G2150/90C08L2205/025C08L2205/035C09D5/08C09D7/62
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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