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Modified silica sol/polyurethane emulsion compound peelable protective paint

A polyurethane emulsion and protective coating technology, applied in the field of packaging and decoration, can solve the problems of poor peelability, single protective performance, low coating film strength, etc., and achieve the effects of preventing pollution, improving appearance, and high coating film strength

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

[0018] The peelable protective coating compounded by modified silica sol and polyurethane emulsion is made of the following raw materials in mass fraction: aromatic water-based polyurethane emulsion 60-80%, silica sol 5-10%, talc powder 3-8%, emulsified silicone oil 1~3%, acrylate copolymer ammonium salt solution 0.1~0.5%, alkali swelling acrylic acid thickener 0.5~1%, polyether polyester modified organosiloxane 0.3~0.6%, acrylic acid copolymer potassium salt 0.1~ 0.5%, polyether-modified silicone 0.1-0.5%, and the balance is distilled water; the aromatic water-based polyurethane emulsion is made from the following raw materials in mass ratio: 40-80 parts of toluene diisocyanate, 40-80 parts of polypropylene glycol , 3~10 parts of dimethylol propionic acid, 50~80 parts of butanone, 5~12 parts of ethylenediamine, 3~11 parts of triethylamine, 1~3 parts of dibutyltin dilaurate, 40~80 parts of distilled water ; The modified silica sol is prepared from the following raw materials i...

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Abstract

The invention discloses a modified silica sol / polyurethane emulsion compound peelable protective paint which is prepared from the following raw materials in percentage by mass: 60-80% of aromatic water-based polyurethane emulsion, 5-10% of silica sol, 3-8% of talcum powder, 1-3% of emulsified silicone oil, 0.1-0.5% of acrylate copolymer ammonium salt solution, 0.5-1% of alkali-swellable acrylic thickener, 0.3-0.6% of polyether polyester modified organosiloxane, 0.1-0.5% of acrylic acid copolymer potassium salt, 0.1-0.5% of polyether-modified organic silicon and the balance of distilled water. The aromatic water-based polyurethane emulsion and silica sol are compounded as the film forming matter, thereby enhancing the mechanical strength, peelability and acid / alkali / salt solution resistance of the paint. By using the talcum powder as the filler, thereby preventing the paint coating from cracking, and enhancing the leveling property, scrub resistance, water resistance and the like of the paint. The adopted alkali-swellable acrylic thickener can enhance the viscosity of the disperse system, increase the thickness of the paint and enhance the stability of the paint.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a peelable protective coating compounded with modified silica sol and polyurethane emulsion. 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 pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/12
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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