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Preparation method for waterproof gas-permeable type textile polyurethane coating agent

A polyurethane coating and air-permeable technology, which is applied in textiles, papermaking, fiber treatment, etc., can solve the problems of fabric moisture permeability decline, etc., and achieve the effect of increasing effective crosslinking density, improving heat resistance, and increasing quantity

Inactive Publication Date: 2018-08-03
常州五荣化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the moisture permeability of the fabric drops significantly after the conventional water-based polyurethane coating agent coats and finishes the fabric, a method for preparing a waterproof and breathable textile polyurethane coating agent is provided

Method used

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  • Preparation method for waterproof gas-permeable type textile polyurethane coating agent

Examples

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Effect test

example 1

[0018] In parts by weight, weigh 45 parts of deionized water, 10 parts of thioglycolic acid, 6 parts of urea, 3 parts of sodium lauryl sulfate, and 6 parts of feathers in an Erlenmeyer flask, stir and mix and place at room temperature Let stand for 3, filter and collect the filtrate to obtain the modified keratin solution; weigh 25 parts of itaconic acid, 10 parts of N-isopropylacrylamide, 3 parts of modified keratin solution, 16 parts by weight respectively One part of N,N-methylenebisacrylamide and 3 parts of ammonium persulfate were placed in a three-necked flask, stirred and mixed, and the air was vented with nitrogen, and the rate of nitrogen gas was controlled to be 25mL / min. Heating in a water bath at 45°C for 20 hours, standing and cooling to room temperature to obtain a gel solution; in parts by weight, weigh 45 parts of 2,4-toluene diisocyanate, 10 parts of polyethylene glycol, 6 parts of polypropylene glycol and 15 parts of The polyacrylonitrile-dimethylformamide so...

example 2

[0020] In parts by weight, weigh 47 parts of deionized water, 12 parts of thioglycolic acid, 7 parts of urea, 4 parts of sodium lauryl sulfate, and 7 parts of feathers in an Erlenmeyer flask, stir and mix and place at room temperature Let stand for 4 hours, filter and collect the filtrate to obtain a modified keratin solution; weigh 27 parts of itaconic acid, 12 parts of N-isopropylacrylamide, 4 parts of modified keratin solution, and 17 parts by weight respectively. One part of N,N-methylenebisacrylamide and 4 parts of ammonium persulfate were placed in a three-necked flask, stirred and mixed, and the air was vented with nitrogen, and the rate of nitrogen gas was controlled to be 27mL / min. Under a nitrogen atmosphere, the three-necked flask was placed Heated in a water bath at 47°C for 22 hours, allowed to stand and cooled to room temperature to obtain a gel solution; weighed 47 parts of 2,4-toluene diisocyanate, 12 parts of polyethylene glycol, 7 parts of polypropylene glycol...

example 3

[0022] In parts by weight, weigh 50 parts of deionized water, 15 parts of thioglycolic acid, 8 parts of urea, 5 parts of sodium lauryl sulfate, and 8 parts of feathers in an Erlenmeyer flask, stir and mix and place at room temperature Let stand for 5 hours, filter and collect the filtrate to obtain a modified keratin solution; weigh 30 parts of itaconic acid, 15 parts of N-isopropylacrylamide, 5 parts of modified keratin solution, and 18 parts by weight respectively. One part of N,N-methylenebisacrylamide and 5 parts of ammonium persulfate were placed in a three-necked flask, stirred and mixed, and the air was vented with nitrogen gas, and the rate of nitrogen gas was controlled to be 30mL / min. Under a nitrogen atmosphere, the three-necked flask was placed Heating in a water bath at 55°C for 24 hours, standing and cooling to room temperature to obtain a gel solution; in parts by weight, weigh 50 parts of 2,4-toluene diisocyanate, 15 parts of polyethylene glycol, 8 parts of poly...

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Abstract

The invention relates to a preparation method for a waterproof gas-permeable type textile polyurethane coating agent, and belongs to the technical field of coating agents. According to the technical scheme adopted by the invention, a keratin solution is prepared from feathers, and is polymerized with a polyurethane material; the coating agent is formed after the polyurethane material and keratin are polymerized, keratin is uniformly dispersed inside the material, and a continuous channel is formed in the modified coating layer, so that water vapor penetration is facilitated; the keratin solution can effectively promote the interface between the keratin and polyurethane to have a great number of seams, so that a novel moisture penetrating channel is formed, and therefore, moisture penetrating amount is remarkably improved, and waterproof gas-permeable performance of the coating agent is further improved. Keratin and polyurethane are polymerized, so that keratin loses water under a high-temperature environment, and heat resistance of a composite material is effectively improved; and meanwhile, in a preparation process, the polyurethane material is subjected to self-polymerization reaction, so that number of terminal groups of prepolymer is increased, and effective cross-linking density of the coating is improved, and therefore, a water pressure resistance value of the coating iseffectively increased, and washing distance and toughness of the coating are effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a waterproof and breathable textile polyurethane coating agent, belonging to the technical field of coating agents. Background technique [0002] Fabric coating agent refers to a multi-functional coated fabric obtained by coating a layer of polymer with strong adhesion on the surface of knitted fabrics, polyester and other fabrics, and undergoing certain chemical processes. The fabric forms a skeleton and provides strength, while the coating provides protection and other functions, giving the fabric some unique properties, such as waterproof, fireproof, flame retardant, moisture vapor permeability, chemical resistance, fluff shedding resistance, microwave shielding, etc. At the same time, the coating can often provide the effect of art and decoration, so by coating the fabric, it can give the fabric a style or function that it did not have before. Compared with other finishing materials, water-based pol...

Claims

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Application Information

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IPC IPC(8): D06M15/568D06M15/31D06M15/15D06M15/285
CPCD06M15/15D06M15/285D06M15/31D06M15/568
Inventor 雷国辉蒋益
Owner 常州五荣化工有限公司
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