Method for preparing water polyurethane hot dissolving coating adhesive used for sofa-like leatheret

An artificial leather, water-based technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc. The effect of high fastness, high strength and stiff hand feeling

Inactive Publication Date: 2008-03-26
华明扬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly has the following disadvantages: as the production cost is relatively high, and it contains a large amount of toxic solvents such as toluene and dimethylformamide, a large amount of solvents discharged during use seriously pollute the environment
[0003] However, the water-based polyurethane prepared by the traditional method has low adhesion fastness, and there is no commercialized water-based polyurethane hot melt for sofa artificial leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 80 grams of polybutylene adipate (PBA2000) and 36 grams of MDI in the flask, react at 85°C for 1.5 hours, cool to 70°C, add 6.8 grams of dimethylolpropionic acid (DMPA), 9.2 grams 1. 4 butanediol, heat and stir for 30 minutes, add 5 drops of dibutyltin dilaurate dropwise, add 70 grams of acetone to reduce the viscosity of the system, keep it warm for 4.5 hours, cool down to room temperature, add 4 grams of triethylamine to neutralize, add 510 grams of ionized water were stirred to remove the acetone to obtain the water-based hot sol.

Embodiment 2

[0015] Add 117 grams of polybutylene adipate and 40 grams of MDI in the flask, react at 85°C for 1.5 hours, cool down to 70°C, add 6.8 grams of DMPA, 8.2 grams of 1,4 butanediol, keep stirring for 30 minutes, Add 5 drops of dibutyltin dilaurate dropwise, add 80 grams of acetone to reduce the viscosity of the system, keep it warm for 4.5 hours, cool down to room temperature, add 4 grams of triethylamine for neutralization, add 500 grams of ionized water, stir, and remove the acetone. That is, the water-based hot sol for sofa-like artificial leather is obtained.

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PUM

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Abstract

The present invention is process of preparing heat dissolving coating adhesive of water soluble polyurethane for adhesion of fabric and artificial leather. The preparation process includes the first reaction of diisocyanate and ester compound to produce pre-polymer with -NCO end group, the subsequent chain expanding reaction with hydrophilic monomer and 1, 4-butanediol, and the final pH regulation to neutrality with amine and adding deionized water through stirring. The heat dissolving coating adhesive has great adhesion strength, capacity of resulting in soft hand feeling of the adhered leather, no volatilization of harmful solvent and environment friendship.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly water-based polyurethane hot-melt coating glue for sofa artificial leather. The hot-melt coating glue produced by this method is mainly used for the bonding of textile fabrics and artificial leather materials. It belongs to the technical field of chemical additives. Background technique [0002] Before the present invention was made, the hot-melt coating glue currently used for sofa class artificial leather was solvent-based PU glue. It mainly has the following disadvantages: as the production cost is relatively high, and it contains a large amount of toxic solvents such as toluene and dimethylformamide, the large amount of solvent it discharges during use seriously pollutes the environment. As countries around the world pay more and more attention to environmental protection requirements, and environmental protection regulations become increasingly stringent, highly polluting s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C09J175/04D06M17/04
Inventor 华明扬
Owner 华明扬
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