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A method for preparing wool softener by organosiloxane modified waterborne polyurethane

A technology of organosiloxane and water-based polyurethane, which is applied in textiles and papermaking, fiber treatment, animal fibers, etc., can solve problems such as poor stability and poor appearance of fabrics, and achieve improved film-forming properties, good softness and appearance, good stability effect

Active Publication Date: 2015-10-28
TONGXIANG PUYUAN WOOLEN KNITTING TECH SERVICE CENT
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the defects of poor stability and poor appearance of fabrics after finishing in the existing silicone softeners.

Method used

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with embodiment.

[0012] The invention provides a method for preparing wool softener by organosiloxane-modified water-based polyurethane, the steps are as follows: (1) Preparation of prepolymer dispersion: in a container, add toluene diisocyanate (TDI), polypropylene oxide Diol (PPG-1000), 1,4-butanediol (BDO) and solvent butanone, the molar ratio of the three is 5:1:1, in the presence of the catalyst dibutyltin dilaurate, at 75-90 Stir and react at ℃ for 1.5~2.5h, add dimethylolpropionic acid (DMPA) and continue to react for 2.5~6h, add triethylamine to neutralize, adjust PH=7~9, wherein the moles of triethylamine, DMPA and TDI The ratio is 1:1:5, then add epoxy siloxane and stir the reaction for 0.5~1h to obtain organosiloxane modified prepolymer, the molar ratio of epoxy siloxane to DMPA is 1:8; the prepolymer The prepolymer dispersion can be obtained by adding deionized water at 5-20°C;

[0013]...

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Abstract

The invention provides a method for preparing a wool softener from organic siloxane modified water-based polyurethane. The method comprises the following preparation steps of: reacting toluene diisocynate (TDI), polypropylene oxide glycol (PPG-1000), 1,4-butanediol (BDO), butanone and a catalyst dibutyltin dilaurate at a temperature in the range from 75 to 90 DEG C for 1.5-2.5 h, adding dimethylolpropionic acid (DMPA) for continuously reacting for 2.5-6 h, adding triethylamine for neutralization, and then adding epoxy siloxane for reacting under stirring for 0.5-1 h to obtain an organic siloxane modified prepolymer; adding de-ionized water to the prepolymer at a temperature ranging from 5 to 20 DEG C to obtain a prepolymer dispersion liquid; dropwise adding ethanediamine solution having the mass percentage concentration of 5-15% to the prepolymer dispersion liquid, and reacting under stirring for 2 h to obtain the organic siloxane modified water-based polyurethane wool softener. According to the invention, the softener obtained by modifying water-based polyurethane by using organic siloxane has better stability and film-forming property, and thus is capable of causing fabrics to have better softness and appearance.

Description

technical field [0001] The invention relates to a preparation method of a fabric finishing agent, in particular to a preparation method of a wool softener. Background technique [0002] Since the softener can give the fabric a soft and comfortable feel, it can improve the quality and added value of the fabric, and has become the main auxiliary agent for textile finishing. With the improvement of people's living standards, the enhancement of environmental protection and health awareness, the requirements for special textile materials are getting higher and higher. This has also contributed to the rapid development of softener varieties. [0003] Silicone softener is an emulsion or microemulsion of polysiloxane and its derivatives, which can make fabrics have a good soft and smooth feel. However, this type of softener is difficult to control due to the stability of its emulsion. During storage and transportation, delamination, oil floating and demulsification often occur, ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/34C08G18/38C08G18/12D06M15/653D06M101/12
Inventor 曹月华
Owner TONGXIANG PUYUAN WOOLEN KNITTING TECH SERVICE CENT
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