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Preparation method of end blocked fluorine-containing waterborne polyurethane finishing agent and application thereof
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A water-based polyurethane, finishing agent technology, applied in the direction of fiber treatment, improved hand fiber, anti-color pollution/anti-fouling fiber, etc., can solve problems such as poor hand feel
Active Publication Date: 2017-03-08
HUNAN INSTITUTE OF ENGINEERING
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Cotton yarn-dyed fabric is made by dyeing cotton warp and weft yarns separately, and then warping and weaving. Cotton yarn-dyed fabric has a comfortable and breathable texture, beautiful pattern and three-dimensional effect. Because it is dyed with raw yarn, the dye permeability is strong. , so the general color fastness is better, but the fabric is subjected to various mechanical friction and dyeing auxiliaries in the process of dyeing and finishing. Cotton yarn-dyed fabric companies are carrying out functional finishing of various fabrics to meet the needs of different styles of fabrics, in order to pursue the maximum added value
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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Embodiment 1
[0062] Perfluorooctaneiodide (520g, 1.16mmol), Na 2 S 2 o 4 (20.9g, 0.12mol), Na 2 HPO 4 (21.5g), acetonitrile (900mL) and water (300mL) were added into a 2L autoclave, and ethylene gas was introduced to make the pressure reach 40atm. After continuing the reaction at 40-45°C for 3 hours, a significant drop in ethylene pressure was found. 19 F NMR traced the reaction and found that the raw materials had reacted completely, stopped the reaction, discharged excess ethylene gas, separated the lower organic layer, washed with water, washed with saturated saline, dried over anhydroussodiumsulfate, and removed the organic solvent under vacuum to obtain the compound perfluorooctaneEthyl iodide was a white solid (525 g, 95% yield, mp 56-57°C). 1 H NMR (300MHz, CDCl 3 )δ: 2.3-3.1 (m, 2H), 3.1-3.5 (m, 2H).
[0082] Perfluorohexaneiodide (446g, 1mol), Na 2 S 2 o 4 (20.9g, 0.12mol), Na 2 HPO 4 (21.5g), acetonitrile (900mL) and water (300mL) were added into a 2L autoclave, and ethylene gas was introduced to make the pressure reach 40atm. The reaction was continued for 3 hours at 40-45°C. 19 F NMR traced the reaction and found that the raw materials had reacted completely, stopped the reaction, discharged excess ethylene gas, separated the lower organic layer, washed with water, washed with saturated saline, dried over anhydroussodiumsulfate, and removed the organic solvent under vacuum to obtain a white solid compound perfluoro Hexaneethyl iodide (331 g, 90% yield, mp 52-53°C).
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention discloses a preparation method of an end blocked fluorine-containing waterborne polyurethane finishing agent and application thereof, and relates to the field of textileengineering. The end blocked fluorine-containing waterborne polyurethane finishing agent is prepared by the steps of performing step-by-step polymerization reaction on fluorine-containing triol R1, polyether triol R2 and diisocyanate R3 to produce prepolymers P1f and then performing end blocking by an end blocking agent Ry. After the obtained end blocked fluorine-containing waterborne polyurethane finishing agent is used for fabric sorting, the softness degree is high; the hand feeling is comfortable; good hydrophilia is realized; drapes cannot easily occur; the ventilation performance and the stain-resistant performance are good; good industrial application prospects are realized.
Description
technical field [0001] The invention belongs to the field of textileengineering, and in particular relates to a preparation method and application of a blocked fluorine-containing waterborne polyurethane finishing agent. Background technique [0002] Water-based polyurethane uses water as the medium, which has the advantages of non-combustibility, non-toxicity, non-pollution, energy saving, and convenient processing; polyurethane has excellent film-forming properties and water resistance, and has been widely used in functional finishing of textiles; however, water-based polyurethane The included hydrophilic segment has high surface free energy, which seriously affects the water and oil repellency of the finished fabric. The method to make up for this shortcoming is to introduce a fluorine-containing segment with low surface energy into the polyurethane structure. Fluoropolymers have many excellent internal and surface properties, such as good weather resistance, water and o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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