Preparation and application method for polyurethane modified acrylate water repellent

An acrylic ester and polyurethane modification technology, which is applied in the field of polymers, can solve the problems of reducing fabric light fastness, poor biodegradability, stimulation, etc., and achieve good effect uniformity, small fabric damage, and low finishing temperature. Effect

Active Publication Date: 2018-12-11
高青如意纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, cationic water repellents can cause some dyes to change color, reduce fabric light fastness, yellowing, inhibit the effect of

Method used

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  • Preparation and application method for polyurethane modified acrylate water repellent
  • Preparation and application method for polyurethane modified acrylate water repellent
  • Preparation and application method for polyurethane modified acrylate water repellent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Prepare the anionic polyurethane-modified acrylate water repellent and finish the fabric according to the following steps:

[0029](1) Preparation of water-based polyurethane containing double bonds at the end: polyoxypropylene glycol (molecular weight 400), 50% dimethylol propionic acid (in this example, the total mass of dimethylol propionic acid accounts for diisocyanate, poly Propylene oxide diol, 3% of the total mass of dimethylolpropionic acid) and dibutyltin dilaurate (0.1% of the mass of the total monomers involved in the reaction) were vacuum dehydrated and dried, and then added toluene diisocyanate under nitrogen protection, -NCO The molar ratio of / -OH was 1.1:1, and the temperature was kept at 50 °C for 4 hours; the remaining dimethylolpropionic acid and dibutyltin dilaurate dissolved in ethyl acetate were added, and the reaction was carried out at 70 °C for 1 hour; hydroxyethyl acrylate ( (accounting for 6% of the mass of the total monom...

Example Embodiment

[0032] Example 2

[0033] Prepare the anionic polyurethane-modified acrylate water repellent and finish the fabric according to the following steps:

[0034] (1) Preparation of water-based polyurethane containing double bonds at the end: polyoxyethylene glycol (molecular weight 200), 20% sodium 1,2-dihydroxy-3-propanesulfonate (accounting for diisocyanate, polyoxyethylene glycol, 1 , 5.4% of the total mass of sodium 2-dihydroxy-3-propanesulfonate) and dibutyltin dilaurate (0.1% of the total mass of the monomers involved in the reaction), vacuum dehydration and drying, and 1,6-hexane was added under nitrogen protection. Diisocyanate, the molar ratio of -NCO / -OH was 2:1, and the temperature was kept at 65 °C for 2.5 hours; then the remaining sodium 1,2-dihydroxy-3-propanesulfonate and dibutyltin dilaurate dissolved in butanone were added. , 50°C for 3h; add hydroxyethyl methacrylate (accounting for 14% of the total monomer mass involved in the reaction), capping at 60°C for 5h;...

Example Embodiment

[0037] Example 3

[0038] Prepare the anionic polyurethane-modified acrylate water repellent and finish the fabric according to the following steps:

[0039] (1) Preparation of water-based polyurethane containing double bonds at the end: polytetrahydrofuran diol (molecular weight 850), 80% dimethylol butyric acid (accounting for 4.5% of the total mass of diisocyanate, polytetrahydrofuran diol, and dimethylol butyric acid) %) and dibutyltin dilaurate (accounting for 0.1% of the total monomer mass involved in the reaction) after vacuum dehydration and drying, isophorone diisocyanate was added under nitrogen protection, -NCO / -OH molar ratio was 1.3:1, 60 ℃ Incubate for 3h; then add the remaining dimethylolbutyric acid dissolved in acetone (and dibutyltin dilaurate, react at 75°C for 1.5h; add hydroxyethyl acrylate (accounting for 8% of the total monomer mass involved in the reaction), 65 End-capping at ℃ for 4h; adding triethylamine (accounting for 3% of the total monomer mass i...

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Abstract

The invention discloses a preparation and application method for a polyurethane modified acrylate water repellent, and belongs to the technical field of macromolecules. According to the preparation and application method, an emulsion polymerization technology is adopted, diisocyanate, polymer dihydric alcohol and a hydrophilic chain extender are subjected to pre-polymerization and chain extension,an end-capping reagent is added for end-capping, then neutralization is carried out, water is added for emulsification, in the absence of an emulsifier, a product and an aliphatic acrylate monomer are subjected to copolymerization so as to prepare an anionic polyurethane modified acrylate composite emulsion, and the anionic polyurethane modified acrylate composite emulsion is used for textile finishing. The preparation and application method has the advantages that a long alkane chain endows fabric with the water repellent property, after the fabric is treated, a layer of water repellent filmis formed on the surface of the fabric, so that the water repellent capacity of the fabric is greatly improved, and polyurethane is added, the fabric can be endowed with the soft and full hand feeling; and in addition, the VOC emission amount is extremely low, and the method is suitable for environmental protection requirements.

Description

technical field [0001] The invention relates to a preparation and application method of a polyurethane-modified acrylate water-repellent agent, which belongs to the technical field of polymers. Background technique [0002] With the development of economy, the improvement of science and technology and the improvement of people's living standards, people's demand for textiles with water-repellent function is increasing day by day. Water-repellent textiles are widely used in clothing, decoration, industry, national defense and other fields. Hydrophobic finishing can be achieved by reducing the surface energy of the fabric and increasing the roughness of the surface. Common water repellents mainly include fluorine-containing, silicone, and aliphatic. Most of the fluorine-containing water-repellent agents contain perfluoroalkyl groups, which have good water-repellent effect, but are expensive and have problems such as bioaccumulation and environmental hazards. The main compone...

Claims

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Application Information

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IPC IPC(8): D06M15/572D06M15/568D06M15/263C08G18/67C08G18/66C08G18/48C08G18/42C08G18/32C08G18/34C08F283/00
CPCD06M15/263D06M15/568D06M15/572C08F283/008C08G18/348C08G18/3855C08G18/4238C08G18/4825C08G18/4854C08G18/6692C08G18/672D06M2200/12C08F220/1818C08F220/1812C08F220/1804C08F220/1808
Inventor 杜金梅翁雨晴王少飞王鸿博许长海孙昌周嫦娥
Owner 高青如意纺织有限公司
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