Waterborne polyurethane emulsion, preparation method for waterborne polyurethane emulsion, application of waterborne polyurethane emulsion to wallpaper basement membrane and wallpaper basement membrane

A water-based polyurethane and wallpaper base film technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of undisclosed water-based polyurethane emulsion, water-based polyurethane emulsion does not have waterproof and alkali resistance, etc., to facilitate large-scale production and application , Improve waterproof and alkali resistance performance, and improve the effect of water contact angle

Inactive Publication Date: 2015-07-29
FUJIAN POLYTECH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based polyurethane emulsion disclosed in the above application does not have the properties of waterproof and alkali

Method used

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  • Waterborne polyurethane emulsion, preparation method for waterborne polyurethane emulsion, application of waterborne polyurethane emulsion to wallpaper basement membrane and wallpaper basement membrane

Examples

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Effect test

preparation example Construction

[0040] The beneficial effect of the preparation method of aqueous polyurethane emulsion of the present invention is:

[0041] (1) The preparation method is simple and easy to operate, which is beneficial to large-scale production and application; the prepared aqueous polyurethane emulsion has good waterproof and alkali-proof performance;

[0042](2) Control the mixed reaction of polyester polyol and diisocyanate at 80-90°C, and control the temperature at 70-80°C after adding a hydrophilic chain extender, which can control the temperature within the range of reaction hot spots to prevent excessive reaction Vigorous, to ensure the smooth progress of the reaction, and at the same time, it can improve the reaction efficiency to a certain extent; when adding the salt-forming agent, reduce the temperature to 35-45 ° C, because the previous reaction temperature was high, if it is neutralized under this condition, it will cause heat generation. The temperature of the reaction system i...

Embodiment 1

[0053] Weigh 100 parts of polyester polyol, 45 parts of diisocyanate, 10 parts of hydrophilic chain extender, 7 parts of salt forming agent, 270 parts of water and 0.5 part of end-capping agent containing fluorocarbon group. The polyester polyol is polyadipate-based polyester diol. The diisocyanate is one or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate and hexamethylene diisocyanate. The hydrophilic chain extender is 2,2-dimethylol propionic acid. The salt-forming agent is triethylamine, and the end-capping agent is trifluoroethanol.

[0054] Mix polyester polyol with diisocyanate, stir at 80°C for 2 hours, then add hydrophilic chain extender, stir at 70°C for 3 hours, lower the temperature to 35°C, then add salt-forming agent, stir well To obtain a prepolymer, add the prepolymer into water stirred at a speed of 800 r / min, stir until the solution is fully emulsified, then add an end-capping agent, and obtain the aqueous polyurethane emu...

Embodiment 2

[0057] Weigh 120 parts of polyester polyol, 55 parts of diisocyanate, 12 parts of hydrophilic chain extender, 9 parts of salt forming agent, 300 parts of water and 1 part of capping agent containing fluorocarbon group. The polyester polyol is polyadipate-based polyester diol. The diisocyanate is one or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate and hexamethylene diisocyanate. The hydrophilic chain extender is 2,2-dimethylol propionic acid. The salt-forming agent is triethylamine, and the end-capping agent is trifluoroethanol.

[0058] Mix polyester polyol and diisocyanate, stir at 90°C for 3 hours, then add hydrophilic chain extender, stir at 80°C for 4 hours, lower the temperature to 45°C, then add salt-forming agent, stir well To obtain a prepolymer, add the prepolymer to water stirred at a speed of 3000r / min, stir until the solution is fully emulsified, then add an end-capping agent, and obtain the aqueous polyurethane emulsion aft...

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Abstract

The invention relates to waterborne polyurethane emulsion which is prepared from the following raw materials in parts by weight: 100-120 parts of polyester polyol, 45-55 parts of diisocyanate, 10-12 parts of hydrophilic chain extender, 7-9 parts of a salt-forming agent, 270-300 parts of water and 0.5-1 part of an end-capping agent containing fluorocarbon groups. The invention further relates to a preparation method for the waterborne polyurethane emulsion, an application of the waterborne polyurethane emulsion to a wallpaper basement membrane and the wallpaper basement membrane. The waterborne polyurethane emulsion has the advantages of no pungent smell, environmental protection, good membrane-forming property and adhesion, and very good water-proof and alkali-proof properties; the preparation method for the waterborne polyurethane emulsion has the advantages of simplicity, easiness for operation and favorability for large-scale production and application; the wallpaper basement membrane has the benefit of capability of guaranteeing good water-proof and alkali-proof properties and product stability and enriching the types of wallpaper basement membrane products at the same time.

Description

technical field [0001] The invention relates to the technical field of film-forming materials, in particular to a water-based polyurethane emulsion, a preparation method thereof, an application on a wallpaper base film, and a wallpaper base film. Background technique [0002] Wallpaper base film is a new type of wall treatment material used in conjunction with wallpaper paste. Before the wallpaper is pasted, apply a layer of wallpaper base film on the wall, which can form a dense protective film on the wall, prevent moisture and alkaline substances from seeping out, effectively prolong the service life of the wallpaper, and at the same time provide It is convenient for later replacement. The method of using the wallpaper base film is very simple: use a paint roller to evenly roll the base film on the wall, and after the base film is dry, stick the wallpaper on it. [0003] The type of wallpaper base film in the prior art is single, and the main film-forming substance is st...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/66C09D175/06
CPCC08G18/44C08G18/348C08G18/6659C09D175/06C08L1/02
Inventor 庄昌清林芙蓉陈金章陈瑞来陈炳琪陈尚泰
Owner FUJIAN POLYTECH TECH CO LTD
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