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Preparation method of low monomer-residual acrylic ester modified aqueous polyurethane pressure-sensitive adhesive

A water-based polyurethane and monomer residue technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., to achieve excellent mechanical properties, good stability, and reduce monomer residue effects

Active Publication Date: 2014-04-09
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this method is only applied to acrylate emulsion, and there is no report on the application of redox initiation system to acrylate-modified waterborne polyurethane.

Method used

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  • Preparation method of low monomer-residual acrylic ester modified aqueous polyurethane pressure-sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Add 40g N210 (polyoxypropylene diol-1000, difunctionality), 200g 330N (polyoxypropylene triol-3000, trifunctionality) and 15g dihydroxypropionic acid (DMPA) into the reactor, mix and stir, put In a water bath at 90°C, after the solid particles are completely dissolved, vacuum dehydrate at a vacuum degree of -0.1Mpa for 1.0h. Cool down to 80°C, add 20g 1-methyl-2-pyrrolidone (NMP), 58g IPDI, 20g acrylate oligomer (viscosity 1000mpa s) and appropriate amount of dibutyltin dilaurate, react for 2h, add 3g trihydroxy Methylpropane (TMP), react for 1h; cool down to 50°C, first reduce the viscosity with an appropriate amount of acetone, then add 13g of triethylamine for neutralization and salt formation for 0.5h; slowly add 856g of water under stirring for high-speed emulsification for 0.5h, then 1g of ethylenediamine was chain-extended for 0.5h, and finally a colorless and transparent emulsion was obtained (theoretical solid content was 30%).

Embodiment 2

[0035] Example 2 : Under the operating conditions of Example 1, N210 and 330N are replaced by 199g polyadipate-1,4-butylene glycol ester diol (polyester-1000), and 15g dihydroxypropionic acid (DMPA) is replaced by 8g , adjust the amount of water added according to the theoretical solid content, and finally get a transparent emulsion with blue light (theoretical solid content is 30%).

Embodiment 3

[0036] Example 3 : under embodiment 1 operating conditions, N210 and 330N are replaced by 110g N210, 15g dihydroxypropionic acid (DMPA) is replaced by 4g, by theoretical solid content regulation water addition, finally obtain the emulsion (theoretical solid content) of transparent band blue light 30%).

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Abstract

The invention provides a preparation method of low monomer-residual acrylic ester modified aqueous polyurethane pressure-sensitive adhesive and belongs to the technical field of adhesives. According to the method, 1) home-made and hydroxyl-containing acrylic ester oligomer is employed to replace acrylic ester monomer modified polyurethane, acrylic ester is subjected to grafting reaction with polyurethane, and then a net structure is formed based on the cross linking of a cross-linking agent, in comparison with the acrylic ester monomer modification, the reaction is more complete, the monomer residual is low, the preparation process is simple, and the purposes of energy saving and environmental protection are fulfilled; 2) the product is subjected to post-treatment by an oxidation-reduction initiator system in order to further reduce the monomer residual amount, and then obtain the green adhesive product with ultra-low monomer residual; and 3), the synthesized product is featured with good stability and excellent mechanical property, both the initial viscosity and the endurable viscosity are higher than that of the simple acrylic ester emulsion and simple acrylic ester monomer modified aqueous polyurethane, so that the adhesive is widely suitable for several fields such as production and daily life as pressure-sensitive adhesive.

Description

technical field [0001] The invention relates to a preparation method of a water-based polyurethane adhesive. Specifically, the invention relates to a method for preparing an ultra-low monomer residue acrylate-modified waterborne polyurethane pressure-sensitive adhesive, which belongs to the technical field of adhesives. Background technique [0002] Water-based polyurethane adhesive is an important type of adhesive, also known as water-based polyurethane. Its film not only has excellent mechanical properties, wear resistance, flexibility, adhesion, chemical resistance and aging resistance, but also has no solvent, low odor, non-flammable, safe, and does not pollute the environment. It is a solvent-based polyurethane One of the best alternative materials. However, water-based polyurethane adhesives also have disadvantages that cannot be ignored, such as poor self-thickening property, low solid content, poor water resistance and gloss of the film, etc. Acrylate resin (PA)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C08G18/62C08G18/12C08G18/82
Inventor 杜郢任筱芳蔡小燕高晓新
Owner 溧阳常大技术转移中心有限公司
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