Preparation method of novel organic silicone oil water repellent agent used for cotton fabric

A technology of silicone oil and water repellent, which is applied in the fields of plant fiber, textiles, papermaking, fiber treatment, etc., and can solve the problems of rough fabric feel, poor washability, and limitations

Inactive Publication Date: 2012-04-11
金伦(苏州)织造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the combination between this type of silicone water repellent and the fiber is an intermolecular force, the washing resistance is poor.
The chloride of polydimethylsilicone oil can be hydrolyzed in sodium hydroxide to produce a crosslinking reaction, and at the same time it is covalently bonded with the fiber, which has a certain effect on improving the washability of the finished textiles, but the chloride of polydimethylsilicone oil The stability of the compound is poor, which is greatly limited in practical application.
However, polydimethylsilicone oil itself has no active groups, and can only be cross-linked through methyl oxidation at high temperatures (250°C to 300°C), and has poor adhesion to fabrics. Generally, it is not suitable as a water-repellent finishing agent for fabrics alone.
The silicon-hydrogen bond in polymethylhydrogen silicone oil (HMPS) has high activity, and under the action of catalyst, it is easy to undergo hydrolysis reaction, and the Si-OH bond formed by hydrolysis can be dehydrated and condensed by itself, cross-linked into an elastic film, or combined with The hydroxyl group on the cellulose reacts to form an ether bond, but the film formed by polymethyl hydrogen-containing silicone oil on the fiber surface is brittle, which makes the fabric feel rough, so it cannot be used alone, but must be mixed with polydimethylsiloxane oil
The present invention adopts low-hydrogen silicone oil modified by tetrahydrofuran to introduce active reactive groups, overcomes the shortcomings of the above-mentioned silicone water repellent, and synthesizes a new type of reactive silicone oil water repellent. The preparation method is simple and the cost is low. The water-repellent effect and washability on cotton fabrics are better. After retrieval, the new type of silicone oil water-repellent agent involved in the present invention has not been reported in the domestic and foreign patents and literatures. However, this new type of silicone oil water-repellent agent is particularly important in the industry. It has a wide range of application value and prospects in textile finishing

Method used

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  • Preparation method of novel organic silicone oil water repellent agent used for cotton fabric
  • Preparation method of novel organic silicone oil water repellent agent used for cotton fabric
  • Preparation method of novel organic silicone oil water repellent agent used for cotton fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0013] (1) In a constant temperature heating magnetic stirrer, fix a dry three-necked flask with an iron stand, add 18.4g (0.2mol) toluene as a reaction solvent, and then use a syringe to take 22.2g of 0.45% hydrogen-containing silicone oil (active 0.1 mol of hydrogen, 21.6 g (0.3 mol) of tetrahydrofuran, and 56.8 g (0.4 mol) of methyl iodide were put into a three-necked flask. Add 0.176g (0.001mol) of palladium chloride catalyst, and adjust the rotating speed of the magnet to make it mix evenly. The reaction temperature was controlled at 50° C., nitrogen was used for protection during the reaction, a serpentine condenser was used to reflux, and the reaction time was 10 h. After the reaction, the product was filtered to remove the catalyst palladium chloride, and then rotary evaporated under a rotary evaporator to obtain a light yellow liquid product, a new type of silicone oil water repellent agent, with a yield of 71.3%.

[0014] (2) Take 10g of zirconium oxychloride in a 1...

Embodiment 2

[0020] (1) In a constant temperature heating magnetic stirrer, fix a dry three-necked flask with an iron stand, add 18.4g (0.2mol) toluene as a reaction solvent, and then use a syringe to take 22.2g of 0.45% hydrogen-containing silicone oil (active 0.1 mol of hydrogen, 21.6 g (0.3 mol) of tetrahydrofuran, and 56.8 g (0.4 mol) of methyl iodide were put into a three-necked flask. Add 0.176g (0.001mol) of palladium chloride catalyst, and adjust the rotating speed of the magnet to make it mix evenly. The reaction temperature was controlled at 50° C., nitrogen was used for protection during the reaction, a serpentine condenser was used to reflux, and the reaction time was 12 hours. After the reaction, the product was filtered to remove the catalyst palladium chloride, and then rotary evaporated under a rotary evaporator to obtain a light yellow liquid product, a new type of silicone oil water repellent agent, with a yield of 80.2%.

[0021] (2) Take 10g of zirconium oxychloride in...

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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PUM

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Abstract

The invention relates to a preparation method of a novel organic silicone oil water repellent agent used for cotton fabric. The preparation method comprises the steps of: under the protection of nitrogen, adding 2 times of molar weight of toluene used as a solvent to a three-neck flask, then respectively adding hydrogen-containing silicone oil with 1 time of molar weight of active hydrogen, 3 times of molar weight of tetrahydrofuran and 4 times of molar weight of iodomethane to the three-neck flask, then adding 0.01 time of molar weight of palladium chloride catalyst, and reacting under the action of the palladium chloride catalyst to prepare the organic silicone oil water repellent agent with active group. The obtained organic silicone oil water repellent agent is mainly used for water repelling finishing of the cotton fabric, can improve water repellent property of the fabric as well as the water repellent durability and tearing resistance of the finished fabric, and is a novel printing and dyeing auxiliary agent.

Description

Technical field: [0001] The invention relates to a preparation method of a silicone oil water-repellent agent, belongs to the technical field of novel printing and dyeing auxiliaries, and can be applied to water-repellent finishing of cotton fabrics. Background technique: [0002] Silicone water repellent has good water repellency, air permeability and washability, and it is also a good softener. Durable water-repellent effect, so this kind of water-repellent agent is widely used at present, and is favored by the textile industry. The traditional silicone water repellent is under the action of catalyst and high temperature to polarize the main chain of silicon oxygen, and the polar part and the polar group on the fiber are combined by electrostatic attraction. When the polar group is combined with the fiber, The non-polar hydrophobic hydrocarbon groups are oriented and rotated, and are arranged continuously and neatly on the outermost layer of the fiber, so as to achieve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/385D06M15/643D06M101/06
CPCC08G77/385C08G77/12C08L83/04C08K5/1535C08K5/02C08K3/16
Inventor 董朝红吕洲王磊朱平
Owner 金伦(苏州)织造有限公司
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