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Aqueous polyurethane resin for pressure-sensitive adhesive and preparation method thereof

A water-based polyurethane and pressure-sensitive adhesive technology, which is applied in the directions of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as poor water resistance of hydrophilic polyurethane pressure-sensitive adhesives, and achieve a simple preparation method. The effect of easy operation, good process controllability and easy availability of raw materials

Active Publication Date: 2015-03-25
XIANGYANG SUNVALOR AEROSPACE FILMS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese Invention Patent Application Publication No. CN1456630 provides a "hydrophilic polyurethane pressure-sensitive adhesive and its preparation method"; the hydrophilic polyurethane provided by the specification The pressure-sensitive adhesive has poor water resistance; the Chinese invention patent application publication number CN103031103A provides (a kind of nano-modified water-based polyurethane pressure-sensitive adhesive for protective film and its preparation method). Improve the performance of adhesives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put 600Kg of hydroxyl-terminated polyester polyol with a hydroxyl content of 0.8mmol / g into the reactor, and raise the temperature to 100-120 ℃ , dehydration under reduced pressure for 120 minutes, lower the temperature to 60-70°C, add 100.22kg of TDI, keep warm at 80°C for 110-120min, add 100 kg of N-methylpyrrolidone solution of dimethylolpropionic acid, and continue to keep warm at 80°C for 110-120min , cooling down to 50~55 ℃， Add 21.48Kg of triethylamine, fully stir for 10 minutes, stop stirring, quickly inject 1055Kg of deionized water into the reactor, start the stirring and emulsifying machine, add 47.08Kg of ethylenediamine solution after emulsifying for 10 minutes, continue emulsifying for 10 minutes, stop emulsifying, continue Stir for 120min, filter and discharge, and pack in a plastic barrel. This reactant is the water-based polyurethane resin used for pressure-sensitive adhesives, 180 o Peel strength 300g.

Embodiment 2

[0030] Put 600Kg of hydroxyl-terminated polyester polyol with a hydroxyl content of 0.8mmol / g into the reactor, and raise the temperature to 100-120 ℃ , dehydration under reduced pressure for 120 minutes, lower the temperature to 60-70°C, add 100.22kg of TDI, keep warm at 80°C for 110-120min, add 110 kg of N-methylpyrrolidone solution of dimethylolpropionic acid, and continue to keep warm at 80°C for 110-120min , cooling down to 50~55 ℃， Add 22.38Kg of triethylamine, fully stir for 10 minutes, stop stirring, quickly inject 1028Kg of deionized water into the reactor, start the stirring and emulsifying machine, add 34.45Kg of ethylenediamine solution after emulsifying for 10 minutes, continue emulsifying for 10 minutes, stop emulsifying, continue Stir for 120min, filter and discharge, and pack in a plastic barrel. This reactant is the water-based polyurethane resin used for pressure-sensitive adhesives, 180 o Peel strength 270g.

Embodiment 3

[0032] Put 600Kg of hydroxyl-terminated polyester polyol with a hydroxyl content of 0.8mmol / g into the reactor, and raise the temperature to 100-120 ℃ , dehydration under reduced pressure for 120 minutes, lower the temperature to 60-70°C, add 100.22kg of TDI, keep warm at 80°C for 110-120min, add 120 kg of N-methylpyrrolidone solution of dimethylol propionic acid, and continue to keep warm at 80°C for 110-120min , cooling down to 50~55℃， Add 23.06Kg of triethylamine, stir thoroughly for 10 minutes, stop stirring, quickly inject 1032Kg of deionized water into the reactor, start the stirring and emulsifying machine, add 24.24Kg of ethylenediamine solution after emulsifying for 10 minutes, continue emulsifying for 10 minutes, stop emulsifying, continue Stir for 120min, filter the discharge, and pack in a plastic barrel. This reactant is the water-based polyurethane resin used for pressure-sensitive adhesives, 180 o Peel strength 240g.

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PUM

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Abstract

The invention discloses aqueous polyurethane resin for a pressure-sensitive adhesive and a preparation method thereof. The preparation method comprises the following steps of carrying out pressure reduction dehydration on hydroxyl-terminated polyester polyol, carrying out cooling, adding diisocyanate into a reactor, carrying out a reaction process at a temperature of 70-90 DEG C for 110-120min, adding a dimethylolpropionic acid solution into the reaction product, carrying out a reaction process for 110-120min, cooling the reaction product to 50-55 DEG C, adding triethylamine into the reaction product for neutralization, carrying out full stirring for 8-10min, stopping stirring, fast pouring deionized water into the reactor, starting stirring and emulsification devices, carrying out emulsification for 8-10min, adding an ethanediamine solution into the emulsion, sequentially carrying out emulsification for 8-10min, stopping emulsification, sequentially carrying out stirring for 90-120min, carrying out filtration and discharging the product. The aqueous polyurethane resin has 180 degree peel strength of 30-300g / 25mm. Through coating machine-based coating, a plurality of the pressure-sensitive adhesive products with excellent performances are obtained and can be widely used for all industries. The preparation method is simple and easy.

Description

technical field [0001] The invention relates to a water-based polyurethane pressure-sensitive adhesive, in particular to a water-based polyurethane resin used for pressure-sensitive adhesives and a preparation method thereof. Background technique [0002] The full name of pressure-sensitive adhesive is pressure-sensitive adhesive, commonly known as self-adhesive, which is a type of adhesive system. According to the curing method and properties, pressure-sensitive adhesives can be divided into: solvent-based pressure-sensitive adhesives, emulsion-type pressure-sensitive adhesives, water-soluble pressure-sensitive adhesives, hot-melt pressure-sensitive adhesives, UV-curable pressure-sensitive adhesives, and electron beam-cured pressure-sensitive adhesives. Type pressure sensitive adhesive, etc. According to the composition and structure of the main resin, pressure-sensitive adhesives can be divided into: rubber pressure-sensitive adhesives, polyacrylate pressure-sensitive adh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G63/181C09J175/06
CPCC08G18/10C08G18/3228C08G18/348C08G18/6659C08G18/721C08G18/7614C08G63/181C09J175/06
Inventor 丁温娜洪晓忠
Owner XIANGYANG SUNVALOR AEROSPACE FILMS CO LTD
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