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Preparation and application of water-borne polyurethane polyacrylate compound emulsion

A polyacrylate emulsion and water-based polyurethane technology, applied in the polymer field, can solve the problems of complex process, unenvironmental protection and high cost, achieve good application prospects and overcome the effect of high energy consumption

Inactive Publication Date: 2012-09-19
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN200810219958.4 discloses a water-based polyurethane acrylic composite coating agent, which is prepared from silicon-modified polyurethane and polyacrylate, and the process is relatively complicated. The cost is high, and the initial adhesion and solid content of the prepared polyurethane coating agent are low
Chinese patent CN200910000809.3 discloses a high-gloss, fast UV-curable water-based polyurethane acrylate applied to plastic substrates. The resin has a high degree of photoreactivity and better dispersion stability, and has high hardness and Excellent wear resistance, especially suitable for coating ABS plastic substrates, but not suitable for use in interior wall humidity control coatings
CN201110070131.3 discloses a preparation method of polyurethane acrylate resin with narrow molecular weight distribution. The polyurethane acrylate resin prepared by this method has excellent mechanical properties and flexibility, excellent chemical resistance and high and low temperature resistance, good It is mainly used for UV-curable coatings, inks and adhesives. However, the preparation of the coating needs to be prepared in the presence of catalysts, polymerization inhibitors and photoinitiators, which is not only costly, but also not environmentally friendly.

Method used

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  • Preparation and application of water-borne polyurethane polyacrylate compound emulsion
  • Preparation and application of water-borne polyurethane polyacrylate compound emulsion
  • Preparation and application of water-borne polyurethane polyacrylate compound emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Preparation of waterborne polyurethane polyacrylate composite emulsion

[0048] Take 1g of polypropylene glycol, 20g of isophorone diisocyanate, and 0.1g of 2,2-dimethylolpropionic acid into a four-neck flask, dissolve with 12g of acetone; heat up to 100°C to start the reaction, react for 80 minutes, and cool down to 30°C ℃, add 0.1g of triethylamine, neutralize for 30 minutes; add 15g of distilled water, stir at high speed (120r / min) and disperse for 30 minutes to obtain a water-based polyurethane emulsion.

[0049] Take another four-necked flask and add 0.1g of compound emulsifier (0.05g of sodium lauryl sulfate, Tween -20 0.05g), distilled water 20g, heat up to 60°C, add dropwise 20g of methyl methacrylate, 1g of acrylic acid, 50g of butyl acrylate, 5g of diacetone acrylamide, and 0.1g of ammonium persulfate as an initiator; Hours, a mixed solution was obtained; the temperature was lowered to 30°C, and the pH value was adjusted to 8 with ammonia water with a mas...

Embodiment 2

[0055] (1) Preparation of waterborne polyurethane polyacrylate composite emulsion

[0056] Weigh 50g of polypropylene glycol, 20g of isophorone diisocyanate, and 0.1g of 2,2-dimethylolpropionic acid into a four-neck flask, dissolve with 1g of acetone; heat up to 100°C to start the reaction, and react for 240 minutes; then cool down At 30°C, add 0.1g of triethylamine and react for 30 minutes; add 5g of distilled water and disperse for 30 minutes with high-speed stirring (300r / min) to obtain a water-based polyurethane emulsion.

[0057] Take another four-necked flask, add compound emulsifier 0.1g (sodium lauryl sulfate 0.02g, Tween -20 0.08g), distilled water 1g, heat up to 60°C, dropwise add 20g of methyl methacrylate, 15g of acrylic acid, 50g of butyl acrylate, 5g of diacetone acrylamide, 0.1g of initiator potassium persulfate, keep warm for 1 Hours, a mixed solution was obtained; the temperature was lowered to 30°C, and the pH value was adjusted to 7 with 5% ammonia water by...

Embodiment 3

[0063] (1) Preparation of waterborne polyurethane polyacrylate composite emulsion

[0064] Weigh 40g of polypropylene glycol, 20g of isophorone diisocyanate, and 12g of 2,2-dimethylolpropionic acid, add them into a four-necked flask, and dissolve them with 15g of acetone; heat up to 40°C and react for 100 minutes; cool down to 30°C , add 0.1g of triethylamine, neutralize and react for 30 minutes; add 30g of distilled water, stir at high speed (300r / min) and disperse for 5 minutes to obtain a water-based polyurethane emulsion.

[0065] Get another four-necked flask, add compound emulsifier 20g (sodium lauryl sulfate 5g, Tween -20 15g), distilled water 50g, heat up to 60°C, start dropwise adding 1g of methyl methacrylate, 20g of acrylic acid, 50g of butyl acrylate, 5g of diacetone acrylamide, 0.1g of initiator ammonium persulfate, and keep warm for 3 Hours, a mixed solution is obtained; the temperature is lowered to 30°C, and the pH value is adjusted to 10 with 10% by mass perc...

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Abstract

The invention provides a method for preparing water-borne polyurethane polyacrylate compound emulsion. The method comprises the following steps of: preparing water-borne polyurethane emulsion by using polypropylene glycol, 2,2-dihydromethyl propionic acid and isophorone diisocyanate as main materials; preparing polyacrylate emulsion by polymerizing methyl methacrylate, acrylic acid, butyl acrylate and diacetone acrylamide serving as main materials; and finally, mixing the water-borne polyurethane emulsion and the polyacrylate emulsion to obtain the water-borne polyurethane polyacrylate compound emulsion. The breathable coating produced by using the water-borne polyurethane polyacrylate compound emulsion as a main film-forming material of coatings integrates functions of decoration, humidity regulation, permeability, heat preservation and condensation prevention, water resistance, alkali resistance and the like, overcomes the defect of high energy consumption of conventional air conditioners, simultaneously prevents the falling of films caused by leakage and water condensation of walls, makes the films more durable and has a better application prospect.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and relates to a water-based polyurethane polyacrylate composite emulsion and a preparation method thereof; the invention also relates to the application of the water-based polyurethane polyacrylate composite emulsion as a main film-forming substance in preparing a humidity-adjusting coating. Background technique [0002] "Code for Design of Heating, Ventilation and Air Conditioning" GB50019-2003 stipulates that the standard value of indoor relative humidity is 40%~60% for air-conditioned rooms in summer and 30%~60% for heated rooms in winter. Air humidity is an important environmental parameter closely related to human health and work and life. When the humidity is too high, it is easy to cause metal surface corrosion, electrical insulation degradation, accelerated mildew of items, severe condensation on the wall, wet deformation of items, and wall skin Falling off, etc.; when the humidit...

Claims

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Application Information

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IPC IPC(8): C08L33/08C08L33/12C08L75/08C08G18/66C08G18/48C08F220/18C08F220/14C08F220/06C08F220/58C08F2/24C09D133/08C09D133/12C09D175/08C09D7/12
Inventor 王荣民张少飞何玉凤刘发锐赵雷雷
Owner NORTHWEST NORMAL UNIVERSITY
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