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Method for preparing organosilicone modified polyether type polyurethane emulsion leather finishing agent

A technology of polyether polyurethane and leather finishing agent, which is applied in the field of leather chemistry, can solve problems such as insufficient adhesion, leveling, and unsatisfactory hygienic performance, and achieve smooth hand feeling, promote firm bonding, and process technology simple effect

Inactive Publication Date: 2013-05-08
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these leather finishing agents have insufficient adhesion, leveling, etc. to the bottom layer, especially the hygienic performance cannot meet people's requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0017] Dehydrate 2.5kg of polyethylene oxide diol and 500g of hydroxy silicone oil under vacuum at 110°C for 1h, then lower the temperature to 50°C; add 1kg of toluene diisocyanate and 1g of dibutyltin dilaurate under nitrogen protection, 75 React at ℃ for 3 hours, then lower the temperature to 30℃; add 300g of N-methyldiethanolamine, react at 60℃ for 4h, then lower the temperature to 40℃; add glacial acetic acid to adjust the pH value to 6, then add 10kg of acetone to carry out Dilute, then add 10kg of deionized water for high-speed emulsification, and vacuum out the acetone solvent to obtain a polyether polyurethane emulsion.

Embodiment 2-1

[0019] Dehydrate 3kg of polyoxyethylene diol and 1kg of hydroxy silicone oil at 120°C for 2h under vacuum, then lower the temperature to 70°C; add 1.5kg of toluene diisocyanate and 50g of stannous octoate under nitrogen protection, and react at 85°C for 2h , then lower the temperature to 40°C; add 600g of N-methyldiethanolamine, react at 65°C for 2h, then lower the temperature to 50°C; add glacial acetic acid to adjust the pH value to 7, then add 2kg of acetone to dilute, then add 8kg of deionized water was used for high-speed emulsification, and the acetone solvent was removed by vacuum to obtain a polyether polyurethane emulsion.

Embodiment 3-1

[0021] Dehydrate 2.6kg of polyoxyethylene diol and 600g of hydroxy silicone oil under vacuum at 115°C for 1.5h, then lower the temperature to 60°C; add 1.2kg of toluene diisocyanate and 5g of stannous octoate under nitrogen protection, at 80°C React for 2.5 hours, then lower the temperature to 35°C; add 500g of N-methyldiethanolamine, react at 62°C for 3h, then lower the temperature to 45°C; add glacial acetic acid to adjust the pH to 5, then add 5kg of acetone to dilute , then add 9kg of deionized water for high-speed emulsification, and vacuum remove the acetone solvent to obtain a polyether polyurethane emulsion.

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Abstract

The invention relates to a method for preparing an organosilicone modified polyether type polyurethane emulsion leather finishing agent. The existing finishing agent has poor combination property. The method comprises the following steps of firstly preparing the organosilicone modified cation polyether type polyurethane emulsion and a finishing agent solution respectively, and mechanically mixing uniformly according to weight ratio of 100:5-10, wherein the preparation method for the organosilicone modified cation polyether type polyurethane emulsion comprises the following steps of adding toluene diisocynate and a catalyst into dehydrated polyoxyethylene dihydric alcohol, reacting, adding N-methyldiethanolamine for further reaction, and then adding acetone and deionized water; and the preparation method for the finishing agent solution comprises the following steps of adding hydroxyethyl cellulose into sodium hydroxide solution, adding glycidyl trimethyl ammonium chloride for reaction, then washing and drying the solid product, and adding the solid product and polyvinylpyrrolidone into the deionized water solution. The method has relatively simple processes; and the prepared leather finishing agent not only has excellent combination property, but also has good antibacterial property.

Description

technical field [0001] The invention belongs to the technical field of leather chemistry, and relates to a preparation method of a leather finishing agent, in particular to a preparation method of an organosilicon-modified cationic polyether type polyurethane emulsion leather finishing agent. Background technique [0002] Leather finishing agent is an important leather chemical that improves the appearance, performance and economic value of leather. After finishing the leather with a finishing agent, a uniform film protective layer is formed on the surface of the leather, which endows the leather with excellent performance such as solvent resistance, flex resistance, wet and dry rub resistance, impact resistance and water resistance. With the development of science and technology, people's demand for leather quality is getting higher and higher, and the quality of leather depends largely on the quality of leather finishing agent. [0003] At present, leather finishing agent...

Claims

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Application Information

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IPC IPC(8): D06M15/653D06M15/647D06M15/09D06M15/356C08G18/76C08G18/48C08G18/61C08B15/06
Inventor 聂秋林袁求理
Owner HANGZHOU DIANZI UNIV
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