Waterproof, grease proof treating compound of fluorine silicon modified polyurethane, and preparation method

A technology of polyurethane waterproofing and fluorosilicon modification, which is applied in fiber treatment, leather surface treatment, small raw hide/big raw hide/leather/fur treatment, etc. It can solve the problems of high cost, uneconomical transportation and storage, and save costs , Novel preparation method, good mechanical stability effect

Active Publication Date: 2007-07-25
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these inventions are that a slight improvement in the emulsion stability of a composition will be more satisfactory. In addition, because the finished products of these finishing agents are all emulsions with fixed solid content, they are uneconomical in transportation and storage, resulting in increased costs.

Method used

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  • Waterproof, grease proof treating compound of fluorine silicon modified polyurethane, and preparation method
  • Waterproof, grease proof treating compound of fluorine silicon modified polyurethane, and preparation method

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preparation example Construction

[0024] The preparation method of fluorosilicon modified polyurethane emulsion of the present invention is as follows:

[0025] The first step reaction: add perfluoroalkene to hydroxysilicone oil with a metering pump (the molar ratio of perfluoroalkene to hydroxysilicone oil is 1:0.5~1.2) within 1-2 hours, and keep stirring to control the temperature at 40- 50°C, and then heat preservation reaction for 3-5 hours to obtain perfluorosiloxane by liquid separation and purification.

[0026] The second step reaction: Add perfluorosiloxane and NaOH solution into the reaction kettle, control the vacuum degree below 13.5KPa, heat to 100°C-130°C to make it dehydrated. Replace with nitrogen three times. Then raise the temperature to 120-160°C, under the pressure of 0.1-0.4MPa, stir and add 2-10 times the amount of ethylene oxide of perfluorosiloxane substance. The temperature is controlled at 80-120°C, and the reaction is 2-5 hours. Obtain perfluoropolyether silicone oil.

[0027] The...

Embodiment 1

[0043] The first step reaction: the hexafluoropropylene trimer (C 9 f 18) with a metering pump to add the same amount of hydroxy silicone oil, within 1.5 hours, and keep stirring to control the temperature at 40 ° C, and then keep warm for 4.5 hours to separate and purify perfluorosiloxane.

[0044] The second step reaction: add perfluorosiloxane and 0.4% by mass of 30% NaOH solution into the reaction kettle, control the vacuum degree below 13.5KPa, heat to 120°C to dehydrate. Replace with nitrogen three times. Then the temperature is raised to 140°C, under the pressure of 0.2MPa, stir and add 4 times the amount of perfluorosiloxane substance ethylene oxide, the temperature is controlled at 100°C, and the reaction is carried out for 2 to 5 hours.

[0045] The third step reaction: use acetone as solvent with perfluoropolyether silicone oil and equal amount of diisocyanate, add 0.1‰ quality of dibutyltin dilaurate as catalyst in N 2 Under protection, react at a temperature of...

Embodiment 2

[0047] The first step reaction: tetrafluoroethylene tetramer (C 8 f 16 ) with a metering pump to add 1.2 times the amount of the substance into the hydroxyl silicone oil, and complete the addition within 1.5 hours, and keep stirring to control the temperature at 40°C, and then keep warm for 4.5 hours to separate and purify the perfluorosiloxane.

[0048] The second step reaction: add perfluorosiloxane and 0.4% by mass of 30% NaOH solution into the reaction kettle, control the vacuum degree below 13.5KPa, heat to 120°C to dehydrate. Replace with nitrogen three times. Then the temperature is raised to 140°C, under the pressure of 0.2MPa, stir and add 4 times the amount of perfluorosiloxane substance ethylene oxide, the temperature is controlled at 100°C, and the reaction is carried out for 2 to 5 hours.

[0049] The third step reaction: perfluoropolyether silicone oil and 1.2 times the amount of diisocyanate in acetone as a solvent, adding 0.2‰ of dibutyltin dilaurate as a cat...

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Abstract

The present invention relates to a fluorosilicone modified polyurethane water-proofing oil-proofing finishing agent and its preparation method. Said invention also provides its chemical structure formula. It is characterized by that it uses perfluor-olefin, hydroxyl silicon oil, epoxyethane and diisocyanate as raw material and makes them undergo the process of synthesis treatment so as to obtain the invented emulsion-fluorosilicone modified polyurethane water-proofing oil-proofing finishing agent.

Description

technical field [0001] The invention belongs to the fields of textile and leather finishing, and relates to a self-emulsifying fluorosilicon modified polyurethane waterproof and oil-proof finishing agent emulsion and a preparation method thereof. The emulsion is mainly used for waterproof, oil-proof and soft finishing of fiber materials such as fabrics and leather. Background technique [0002] Water-based polyurethane emulsion has been widely used in textile, leather finishing and other industries. CN1704523 discloses a production process of water-based polyurethane with end-capping or unsaturated bond structure and a finishing method for fabric anti-wrinkle and shape retention. Using prepolymer polymerization and end-capping technology, a stable water-based polyurethane with reactive end groups is prepared, and the latex particle size distribution can be adjusted within 50-500nm. After dilution, it can be used as fabric finishing, which can make the fabric obtain functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/564D06M15/643D06M101/00C14C11/00
Inventor 张永明张恒张秀华
Owner SHANDONG DONGYUE POLYMER MATERIAL
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