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Preparation method of aromatic polyurethane emulsion water-based paint

A technology of polyurethane emulsion and water-based coatings, which is applied in antifouling/underwater coatings, anti-corrosion coatings, coatings, etc., and can solve problems such as poor peelability, single protective performance, and low 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

[0024] The preparation method of aromatic polyurethane emulsion water-based paint comprises the following steps:

[0025] 1) Add methyl ethyl ketone to the flask containing epoxy resin, stir and mix at a speed of 150~200r / min for 10~30min to obtain epoxy resin-butanone solution, and set aside; put the raw material polypropylene glycol into a drying oven for dehydration 450~500min, the drying temperature is controlled at 110~125°C, and it is set aside; the raw material dimethylolpropionic acid is dried in an oven for 100~150 minutes, and the drying temperature is controlled at 110~125°C, set aside; the raw materials triethylamine and Butanone is dehydrated with molecular sieve for 5-7d, and it is set aside;

[0026] 2) Add toluene diisocyanate, dibutyltin dilaurate, polypropylene glycol, polyethylene glycol, triethylamine and butanone after dehydration treatment in step 1) into the first reaction kettle at room temperature, and then raise the temperature to 58 ~70°C, let them ...

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Abstract

The invention discloses a preparation method of an aromatic polyurethane emulsion water-based paint. The preparation method comprises the following steps: 1) preparing an epoxy resin-butanone solution; drying raw materials; 2) adding toluene diisocyanate and the like into a first reaction kettle to obtain a primary product; 3) adding dimethylolpropionic acid into the primary product, and adding triethylamine to obtain an epoxy modified aromatic polyurethane emulsion; 4) adding a silica sol and the epoxy modified aromatic polyurethane emulsion into a third reaction kettle at room temperature to obtain a mixed emulsion for later use; 5) adding right amounts of acrylic acid copolymer potassium salt and the like into a distilled-water-containing fourth reaction kettle to obtain a mixed substrate; and 6) adding the mixed emulsion into the mixed substrate to obtain the aromatic polyurethane emulsion water-based paint. The paint disclosed by the invention has the advantages of excellent water resistance, higher stability, higher cohesive force, favorable peelability and higher coated film strength.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a preparation method of an aromatic polyurethane emulsion water-based paint. 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 coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/08C09D5/16C09D7/12C09D7/06C08G18/66C08G18/58C08G18/48C08G18/34C09D7/47
Inventor 谭春芳
Owner 重庆市共赢包装制品有限公司
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