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Preparation method of environment-friendly type aqueous polyurethane hot sol for clothing artificial leather

An environment-friendly, water-based polyurethane technology, which is applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesives, etc., can solve solvent pollution, few water-based polyurethanes, low adhesion fastness of water-based polyurethanes, etc. question

Inactive Publication Date: 2008-04-09
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
However, the water-based polyurethane prepared by the traditional method has low adhesion fastness, and there are few commercialized water-based polyurethane hot melts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 80 grams of polypropylene glycol with a molecular weight of 1000 and 36 grams of MDI in the flask, react at 85°C for 1.5 hours, cool down to 70°C, add 6 grams of DMPA, 8.6 grams of 1,4 butanediol, keep stirring for 30 minutes, add dropwise Add 5 drops of dibutyltin dilaurate, 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, stir, and remove the acetone to obtain The invention discloses an environment-friendly water-based polyurethane thermal sol for clothing artificial leather.

Embodiment 2

[0014] Example 2: Add 117 grams of polyether 220, 40 grams of IPDI, HDI or TDI in the flask, react at 85°C for 1.5 hours, cool down to 75°C, add 6 grams of DMPA, 7.5 grams of 1,4 butanediol, and keep warm Stir for 30 minutes, add 5 drops of dibutyltin dilaurate dropwise, add 80 grams of ethyl acetate 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 deionized water, and stir , slough the ethyl acetate, promptly obtain the environment-friendly water-based polyurethane hot-sol for clothing artificial leather of the present invention.

Embodiment 3

[0016] Use 50 grams of the above environment-friendly water-based polyurethane hot-sol for clothing artificial leather, scrape it on the PET base cloth, and bond it with PVC on the calender. The obtained composite material has high adhesive strength, and the peel strength of the test can reach 10N / 15mm , and the composite material is soft to the touch.

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PUM

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Abstract

The invention relates to an environment-friendly preparation method of waterborne polyurethane thermosol used for artificial leather of cloth. The thermosol made in the preparation method is mainly used for bonding of synthesized artificial leather in fabric and clothing production. Diisocyanate and binary alcohols compound can be mixed to make prepolymer, the terminal group of which is minus NCO, and then dihydromethyl propionic acid and 1, 4-butanediol are added to do chain extending reaction. In the end after amine being used for adjusting the pH value to neutrality, deionized water is added and stirred. Then the environment-friendly waterborne polyurethane thermosol used for the artificial leather of cloth is obtained. The waterborne polyurethane thermosol made in the method has high adhesion strength and can stand strong intensity. The bonding fabric is soft and has good water resistance and waterproof performance.

Description

technical field [0001] The invention relates to a method for preparing an environment-friendly water-based polyurethane thermal sol for clothing artificial leather. The thermal sol produced by the method is mainly used for bonding textile fabrics and clothing synthetic artificial leather materials. It belongs to the technical field of textile auxiliaries. technical background [0002] Before the present invention was made, the hot-melt coating adhesives currently used for luggage artificial leather were solvent-based PU adhesives or acrylic adhesives. 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 strict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09D175/04D06N3/12
Inventor 华明扬
Owner 华明扬
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