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Preparation method for organic silicon modified polyester type polyurethane emulsion leather finishing agent

A technology of polyurethane emulsion 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 simple method and process Effect

Inactive Publication Date: 2013-05-01
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

[0018] Dehydrate 3kg of polyethylene adipate diol and 500g of hydroxy silicone oil under vacuum at 110°C for 1 hour, then lower the temperature to 50°C; add 1kg of toluene diisocyanate and 1g of dibutyl dilauric acid under nitrogen protection Tin, react at 65°C for 3h, then lower the temperature to 30°C; add 300g N-methyldiethanolamine, react at 60°C for 4h, then lower the temperature to 40°C; add glacial acetic acid to adjust the pH value to 6, then add Diluted with 10kg of acetone, then added 10kg of deionized water for high-speed emulsification, vacuumed off the acetone solvent to obtain a silicone-modified cationic polyester polyurethane emulsion.

Embodiment 2-1

[0020] Dehydrate 3.5kg of poly(1,4-butylene adipate)diol and 1kg of hydroxysilicone oil at 120°C under vacuum for 2 hours, then lower the temperature to 70°C; add 1.5kg of toluene diisocyanate, 50g stannous octoate, react at 75°C for 2h, then lower the temperature to 40°C; add 600g 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 , and then add 2kg of acetone for dilution, then add 8kg of deionized water for high-speed emulsification, and vacuum the acetone solvent to obtain a silicone-modified cationic polyester polyurethane emulsion.

Embodiment 3-1

[0022] Dehydrate 3.2kg of polyethylene adipate diol and 600g of hydroxy silicone oil under vacuum at 115°C for 1.5h, then lower the temperature to 60°C; under nitrogen protection, add 1.2kg of toluene diisocyanate, 5g of Tin, react at 70°C for 2.5h, then lower the temperature to 35°C; add 400g of N-methyldiethanolamine, react at 62°C for 3h, then lower the temperature to 45°C; add glacial acetic acid to adjust the pH value to 5, then Add 6kg of acetone for dilution, then add 9kg of deionized water for high-speed emulsification, and vacuum the acetone solvent to obtain a silicone-modified cationic polyester polyurethane emulsion.

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Abstract

The invention relates to a preparation method for an organic silicon modified polyester type polyurethane emulsion leather finishing agent. The conventional finishing agent is poor in comprehensive performance. The preparation method comprises the steps as follows: preparing an organic silicon modified cationic polyester type polyurethane emulsion and a finishing agent solution respectively at first and then uniformly mixing by a machine according to the weight ratio of 100:(5-10). The organic silicon modified cationic polyester type polyurethane emulsion is prepared by adding toluene diisocynate and a catalyst into dehydrated polyester polyol, reacting, adding N-methyldiethanolamine for continuing to react, and adding acetone and de-ionized water. The finishing agent solution is prepared by adding hydroxyethyl cellulose into a sodium hydroxide solution, adding epoxypropyl trimethyl ammonium chloride for reaction, washing and drying a solid product, and adding the solid product and polyvinylpyrrolidone into the de-ionized water for dissolution. The preparation method is simpler in process, and the prepared leather finishing agent is excellent in comprehensive performance and good in antibacterial properties.

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 polyester 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 agents...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D139/06C09D101/28C14C11/00D06M15/572D06M15/356D06M15/09C08G18/66C08G18/61C08G18/42C08B11/193
Inventor 袁求理聂秋林
Owner HANGZHOU DIANZI UNIV
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