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Preparation method of high adhesion property waterborne polyurethane adhesive used for artificial leather

A technology of water-based polyurethane and high adhesion, which is applied in the direction of polyurea/polyurethane adhesives, non-polymer adhesive additives, adhesive types, etc., and can solve the requirements that water-based polyurethane adhesives cannot meet the application requirements and other problems, to achieve the effect of great market competitiveness and production efficiency, high bonding strength and simple steps

Inactive Publication Date: 2018-12-18
孙桂芝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for now, the water-based polyurethane adhesive for synthetic leather can not meet the application requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of synthetic leather with highly cohesive water-based polyurethane adhesive, comprises the steps:

[0031] (1) Preparation of characteristic additives:

[0032] a. First put the diatom powder into the grinder for grinding, and then pass through a filter with a particle size of 1-5 μm to obtain ultra-fine diatom powder for later use;

[0033] b. Put the ultrafine diatom powder obtained in operation a into the mixed solution A, then filter it out after ultrasonic treatment for 1h, and obtain the filter material B for later use; the mixed solution A is composed of the following parts by weight: 0.2 parts of phosphoric acid , 0.1 part of phytic acid, 200 parts of deionized water;

[0034] c. Put the filter material B gained in operation b into the stirring tank, then add an ethanol solution with 5 times the total mass of the filter material B in the stirring tank, and centrifuge after 25 minutes of continuous stirring to obtain the filter mater...

Embodiment 2

[0051] A kind of preparation method of synthetic leather with highly cohesive water-based polyurethane adhesive, comprises the steps:

[0052] (1) Preparation of characteristic additives:

[0053] a. First put the diatom powder into the grinder for grinding, and then pass through a filter with a particle size of 1-5 μm to obtain ultra-fine diatom powder for later use;

[0054] b. Put the ultrafine diatom powder obtained in operation a into the mixed solution A, then filter it out after ultrasonic treatment for 1.3h, and obtain the filter material B for later use; the mixed solution A is composed of the following parts by weight: 0.3 parts Phosphoric acid, 0.2 parts of phytic acid, 210 parts of deionized water;

[0055] c. Put the filter material B obtained in operation b into the stirring tank, then add the ethanol solution with 5.5 times the total mass of the filter material B in the stirring tank, and centrifuge after 28 minutes of continuous stirring to obtain the filter m...

Embodiment 3

[0072] A kind of preparation method of synthetic leather with highly cohesive water-based polyurethane adhesive, comprises the steps:

[0073] (1) Preparation of characteristic additives:

[0074] a. First put the diatom powder into the grinder for grinding, and then pass through a filter with a particle size of 1-5 μm to obtain ultra-fine diatom powder for later use;

[0075] b. Put the ultrafine diatom powder obtained in operation a into the mixed solution A, then filter it out after ultrasonic treatment for 1.5h, and obtain the filter material B for later use; the mixed solution A is composed of the following parts by weight: 0.4 parts Phosphoric acid, 0.3 parts of phytic acid, 220 parts of deionized water;

[0076] c. Put the filter material B gained in operation b into the stirring tank, then add an ethanol solution with 6 times the total mass of the filter material B in the stirring tank, and centrifuge after 30 minutes of continuous stirring to obtain the filter materi...

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PUM

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Abstract

The invention discloses a preparation method of high adhesion property waterborne polyurethane adhesive used for artificial leather, wherein the preparation method includes: 1) adding specific additives; 2) synthesizing a polyurethane prepolymer; 3) preparing a waterborne polyurethane emulsion; 4) preparing a finish product of the adhesive. The preparation method has reasonable combination of processes and simple steps and is easy to promote and apply. The adhesive has high adhesion strength, is good in water resistance, is great in corrosion and solvent resistance, and has excellent market competitiveness and productivity.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather processing, and in particular relates to a preparation method of a high-cohesive water-based polyurethane adhesive for synthetic leather. Background technique [0002] my country has become a major producer of synthetic leather. Solvent-based polyurethane resin, as the basic raw material for the base layer and surface layer of traditional synthetic leather products, has an annual demand of more than 1.2 million tons. Most of its production process uses toluene, xylene and DMF as solvents. Although 85% of the solvents in the wet process are recycled, about 15% of the solvents in the wet process and 50% in the dry process cannot be recovered, which not only causes a lot of waste of organic solvents, but also has a serious impact on the ecology. environment. Water-based polyurethane resin uses water as the dispersion medium, and has the advantages of non-combustibility, non-toxicity, saf...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J11/04C08G18/32C08G18/66C08G18/42
CPCC08G18/3206C08G18/4238C08G18/664C09J11/04C09J175/06C08K9/04C08K7/26C08K3/042
Inventor 孙桂芝
Owner 孙桂芝