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Preparation method of aqueous polyurethane adhesive for laminated composite fabrics

A water-based polyurethane and composite fabric technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc. Effect

Inactive Publication Date: 2013-06-26
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product is used for compounding PVC and woven fabrics. The process is simple and the bonding effect is good. However, because it is a solvent-based adhesive, it not only pollutes the environment, but also is harmful to the human body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Mix 13g N210 (polyoxypropylene diol-1000, difunctionality), 7g 330N (polyoxypropylene triol-3000, trifunctionality), 167g PBA-3000 (polyoxypropylene adipate-1,4-butylene glycol ester Diol-3000, difunctionality), 13g of dihydroxypropionic acid (DMPA) and 13g of hydroxyl-terminated siloxane (8427) were added to the reactor, mixed and stirred, and placed in a 90°C water bath. After the solid particles were completely dissolved, the Vacuum dehydration at -0.1Mpa for 1.0h. Cool down to 60°C, add 60g of 1-methyl-2-pyrrolidone (NMP), 77g of MDI (solid), 3.5g of DEG (diethylene glycol) and an appropriate amount of dibutyltin dilaurate, react for 3 hours; heat up to 80°C, add 17.5g of methyl ethyl ketone oxime, react for 3h; lower the temperature to 50°C, first reduce the viscosity with an appropriate amount of acetone, then add 15g of triethylamine to neutralize and form a salt for 0.5h; slowly add 612g of water to emulsify at a high speed for 0.5h under stirring, ...

Embodiment 2

[0030] Example 2: Under the operating conditions of Example 1, 167gPBA-3000 (polyadipate-1,4-butylene glycol ester diol-3000, difunctionality) is replaced with 267gPBA-2000 (polyadipate-1,4 -butanediol ester diol-2000), replace 13gDMPA with 7gDMPA, adjust the theoretical solid content (40%) to adjust the amount of water added, and finally get a milky white emulsion with blue light, and then add 1g tetraethylenepentamine.

Embodiment 3

[0031] Example 3 : Under the operating conditions of Example 1, 167gPBA-3000, 13gN210, 7g330N were replaced by 60gPBA-2000, 13g silicone 8427 was replaced by 3g monoglyceride, and the amount of water added was adjusted according to the theoretical solid content (35%), and finally a white emulsion was obtained , Then add 2.0g of diethylenetriamine and 4g of polyurethane thickener AR-540.

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PUM

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Abstract

The invention relates to a preparation method of an aqueous polyurethane adhesive for laminated composite fabrics, and belongs to the technical field of adhesives. A blocking agent is utilized to block the excess -NCO groups in the synthesis, the -NCO groups are released in high temperature calendering and react with the hydroxy groups in the fabrics, and simultaneously the polar groups on the surfaces of materials comprising PVC and the like and urethane bonds, ester bonds, ether bonds and the like of polyurethane form hydrogen bonds, so the bonding strength is improved; and a thickening agent and / or a cross-linking agent are / is added after emulsification, so the viscosity of an emulsifier is improved, and an adhesive exudation problem during construction is solved. The adhesive can be stably stored in air at room temperature. The adhesive has the advantages of good adhesion, good water resistance, good yellowing resistance, and good mechanical performances.

Description

technical field [0001] The invention relates to a preparation method of a green organic (water-based polyurethane) adhesive. Specifically relates to a preparation method of a water-based polyurethane adhesive. It belongs to the technical field of adhesives. Background technique [0002] With the improvement of living standards, people's performance requirements for textiles tend to be diversified, and pure textile materials are no longer enough to meet people's needs. So now many people are researching to combine cloth with cloth or other materials (such as PVC, PET, ABS, etc.) to obtain a laminated composite fabric. This composite fabric not only maintains the performance advantages of the basic material, but also complements other materials to meet people's different needs. [0003] The process of laminating composite fabrics generally includes flame melting method, calendering method, hot melt method, and adhesive method, among which the adhesive method (that is, the c...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J175/06C09J175/08C08G18/83C08G18/66C08G18/12D06M17/10B32B7/12
Inventor 杜郢罗莉娟朱博雅宋健
Owner CHANGZHOU UNIV
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