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Waterborne urethane acrylate core-shell crosslinking type emulsion for humidity-regulating coating

A polyurethane acrylate, cross-linking technology, applied in the direction of coating, etc., can solve the problems of poor compatibility, low transparency, affecting the performance and application of water-based polyurethane polyacrylate composite emulsion, etc., to achieve the improvement of anti-sticking performance, distribution homogeneous, good compatibility and stability effects

Inactive Publication Date: 2012-12-12
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility of PU and PA, the mixed emulsion has a small amount of delamination and low transparency, which affects the performance and application of waterborne polyurethane polyacrylate composite emulsion.

Method used

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  • Waterborne urethane acrylate core-shell crosslinking type emulsion for humidity-regulating coating
  • Waterborne urethane acrylate core-shell crosslinking type emulsion for humidity-regulating coating
  • Waterborne urethane acrylate core-shell crosslinking type emulsion for humidity-regulating coating

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Preparation of water-based urethane acrylate core-shell cross-linked emulsion: Take 500g of polypropylene glycol, 1g of isophorone diisocyanate, and 200g of 2,2-dimethylolpropionic acid into a four-necked flask, and dissolve with 10g of acetone , raise the temperature to 50°C to start the reaction, react for 60 minutes, cool down to 30°C, add triethylamine g to neutralize the reaction for 10 minutes, then add 50 g of hydroxyethyl methacrylate to react for 30 minutes, then add 100 g of deionized water for high-speed dispersion ( The rotation speed is 120r / min) for 30 minutes to obtain the waterborne polyurethane prepolymer. Then add compound emulsifier 10g (sodium lauryl sulfate 5g, Tween -20 5g), heat up to 100°C, start to drop 50g of methyl methacrylate, 100g of butyl acrylate mixed monomer and 100g of potassium persulfate. % ammonia water to adjust the PH value to 10 to obtain a water-based polyurethane acrylate core-shell cross-linked emulsion. The basic perfor...

Embodiment 2

[0036] (1) Preparation of water-based polyurethane acrylate core-shell crosslinked emulsion: Take 50g of polypropylene glycol, 200g of isophorone diisocyanate, and 20g of 2,2-dimethylolpropionic acid into a four-necked flask, and dissolve with 10g of acetone , raise the temperature to 80°C to start the reaction, react for 100 minutes, cool down to 30°C, add 100g of triethylamine to neutralize the reaction for 30 minutes, then add 200g of hydroxyethyl methacrylate to react for 10 minutes, then add 20g of deionized water for high-speed dispersion ( The rotation speed is 100r / min) for 10 minutes to obtain the waterborne polyurethane prepolymer. Then add compound emulsifier 20g (sodium lauryl sulfate 5g, Tween -20 15g), heat up to 90°C, start dropwise adding 10g of methyl methacrylate, 200g of butyl acrylate mixed monomer and 10g of initiator potassium persulfate, keep warm for 2 hours after the addition, and finally cool down to 30°C Adjust the pH value of 25% ammonia water to 7...

Embodiment 3

[0039] (1) Preparation of water-based polyurethane acrylate core-shell crosslinked emulsion: Take 100g of polypropylene glycol, 20g of isophorone diisocyanate, and 200g of 2,2-dimethylolpropionic acid into a four-necked flask, and dissolve with 50g of acetone , raise the temperature to 100°C to start the reaction, react for 10 minutes, cool down to 70°C, add 50g of triethylamine to neutralize the reaction for 15 minutes, then add 100g of hydroxyethyl methacrylate to react for 30 minutes, then add 2g of deionized water for high-speed dispersion ( The rotation speed is 300r / min) for 10 minutes to obtain the waterborne polyurethane prepolymer. Then add compound emulsifier 50g (sodium lauryl sulfate 10g, Tween -20 40g), heat up to 90°C, start to add dropwise 150g of methyl methacrylate, 500g of butyl acrylate mixed monomer and 20g of initiator (ammonium persulfate). Aqueous polyurethane acrylate core-shell cross-linked emulsion can be obtained by adjusting the pH value to 7 with ...

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Abstract

The invention provides a waterborne urethane acrylate core-shell crosslinking type emulsion for a humidity-regulating coating. Polypropylene glycol, isophorone diisocyanate and the like are dissolved in acetone, heated to 40 to 100 DEG C, and reacted for 60 to 240 minutes; the temperature is reduced to 30 to 70 DEG C, triethylamine is added to be subjected to a neutralization reaction; hydroxyethyl methacrylate is added to react for 10 to 100 minutes; deionized water is added for high-speed dispersion to obtain aqueous polyurethane; a composite emulsifier is added, and heated to 40 to 100 DEG C, and methyl methacrylate, butyl acrylate and an initiator are dropwise added to react for 1 to 6 hours during the condition that the temperature is kept; and the temperature is reduced to 30 to 70 DEG C, and the pH is regulated to 7 to 10 with aqueous ammonia to obtain the waterborne urethane acrylate core-shell crosslinking type emulsion. The waterborne urethane acrylate core-shell crosslinking type emulsion has excellent water absorption and water resistance, good compatibility and stability, and no phase separation, is homogeneous and transparent, and is used for preparing the humidity-regulating coating and is favorable for improving the water absorption and wash resistance of the coating.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, relates to a water-based polyurethane acrylate emulsion, and intentionally relates to a water-based polyurethane acrylate core-shell cross-linked emulsion for humidity-adjusting coatings. technical background [0002] Air humidity is an important environmental parameter closely related to human health and work and life. When the humidity is too high, the concentration of thyroxine and adrenaline in the human body will be relatively reduced, cells will be "lazy", and people will be listless and depressed . Working and living in a place with high humidity for a long time is also prone to rheumatism, and it is easy to cause metal surface corrosion, electrical insulation decline, accelerated mildew of items, severe condensation on the wall, wet deformation of items, and peeling off of the wall skin; If the humidity is too low, the evaporation will speed up, and the dry air will e...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08G18/67C09D151/08
Inventor 王荣民张少飞何玉凤李琛李军
Owner NORTHWEST NORMAL UNIVERSITY
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