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Sulfonic acid/carboxylic acid type silicon-containing polyurethane acrylate water repellent as well as preparation and application thereof

A urethane acrylic and carboxylic acid type technology, which is used in the field of sulfonic acid/carboxylic acid type silicon-containing urethane acrylate water repellent and environment-friendly polymers, can solve the problems of low solid content, yellowing, poor stability, etc.

Active Publication Date: 2020-11-24
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cationic polyurethane has the problem of yellowing. At the same time, most of the additives in the textile industry are anionic. The use of cationic water repellent will affect the finishing of other additives.
Carboxylic acid-based water-based polyurethane acrylate water-repellent agents will affect the softness of fabrics after finishing the fabric, and at the same time, this type of water-repellent agent has disadvantages such as poor stability and low solid content.

Method used

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  • Sulfonic acid/carboxylic acid type silicon-containing polyurethane acrylate water repellent as well as preparation and application thereof
  • Sulfonic acid/carboxylic acid type silicon-containing polyurethane acrylate water repellent as well as preparation and application thereof
  • Sulfonic acid/carboxylic acid type silicon-containing polyurethane acrylate water repellent as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Follow the steps below to prepare sulfonic acid / carboxylic acid type silicon-containing polyurethane acrylate water repellent and finish the fabric:

[0071] Preparation of sulfonic acid / carboxylic acid type silicon-containing polyurethane:

[0072] Polytetrahydrofuran (polyether diol, Mn=2000) and sulfonate polyester diol (Mn=2000) were vacuum-dried at 120° C. to remove water. Under the protection of nitrogen, polytetrahydrofuran, sulfonate polyester diol (accounting for 10% of the total mass of the prepolymer), and hydroxyl silicone oil (accounting for 1% of the total mass of the prepolymer) were added to the reactor, and the catalyst dilauric acid di Butyl tin (accounting for 0.2% of the total mass of the prepolymer), slowly drop isophorone diisocyanate (according to the molar ratio of isocyanate and total hydroxyl group 1.2:1), heat up to 80 ° C, and use the di-n-butylamine method to measure the reaction After the -NCO content in the system reaches the theoretical ...

Embodiment 2

[0078] Follow the steps below to prepare sulfonic acid / carboxylic acid type silicon-containing polyurethane acrylate water repellent and finish the fabric:

[0079] Preparation of sulfonic acid / carboxylic acid type silicon-containing polyurethane:

[0080] Polytetrahydrofuran (polyether diol, Mn=200) and sulfonate polyester diol (Mn=500) were vacuum-dried at 120° C. to remove water. Under the protection of nitrogen, polytetrahydrofuran, sulfonate polyester diol (accounting for 50% of the total mass of the prepolymer), and hydroxyl silicone oil (accounting for 10% of the total mass of the prepolymer) were added to the reactor, and the catalyst dilauric acid di Butyl tin (accounting for 0.5% of the total mass of the prepolymer), slowly drop isophorone diisocyanate (according to the molar ratio of isocyanate and hydroxyl group 3:1), heat up 65 ° C, and use the di-n-butylamine method to measure After the -NCO content reaches the theoretical value, proceed to the next step of reac...

Embodiment 3

[0086] Follow the steps below to prepare sulfonic acid / carboxylic acid type silicon-containing polyurethane acrylate water repellent and finish the fabric:

[0087] Preparation of sulfonic acid / carboxylic acid type silicon-containing polyurethane:

[0088] Polytetrahydrofuran (polyether diol, Mn=1000) and sulfonate polyester diol (Mn=1200) were vacuum-dried at 120° C. to remove water. Under the protection of nitrogen, polytetrahydrofuran, sulfonate polyester diol (accounting for 20% of the total mass of the prepolymer), and hydroxyl silicone oil (accounting for 8% of the total mass of the prepolymer) were added to the reactor, and the catalyst dilauric acid di Butyl tin (accounting for 0.3% of the total mass of the prepolymer), slowly drop isophorone diisocyanate (according to the molar ratio of isocyanate and hydroxyl group 1.6:1), heat up 65 ° C, and use the di-n-butylamine method to measure - After the NCO content reaches the theoretical value, proceed to the next step of ...

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Abstract

The invention discloses a sulfonic acid / carboxylic acid type silicon-containing polyurethane acrylate water repellent as well as preparation and application thereof, and belongs to the field of environment-friendly textiles. According to the water repellent prepared by the invention, sulfonic acid and carboxylic acid hydrophilic groups are introduced into polyurethane in a self-emulsifying manner,so that the problems of reduction of a water repellent effect, environmental pollution and the like caused by emulsification of a conventional acrylate water repellent by an additional low-molecularsurfactant are solved; meanwhile, hydroxyl silicone oil is introduced into a polyurethane chain segment, so that the softness of the water repellent can be improved; and carbon-carbon double bonds areintroduced into a polyurethane side chain, so that the connection number of the polyurethane and acrylate can be increased, and the compatibility is improved. An oxime-containing end-capping agent can be unsealed when a fabric is baked at a high temperature, and chemical crosslinking of the oxime-containing end-capping agent and the surface of the fabric is realized, so that the fastness of the water repellent is enhanced.

Description

technical field [0001] The invention relates to a sulfonic acid / carboxylic acid type silicon-containing polyurethane acrylate water-repellent agent and its preparation and application, belonging to the environment-friendly polymer technology. Background technique [0002] With the development of the times and science and technology, the textile industry is also developing rapidly. Today's consumer demand for textiles is no longer satisfied with simple clothing functions, but requires textiles to have higher added value, that is, the functionalization of textiles. Demand is increasing day by day. There are many types of functionalized textiles including water repellency, flame retardant, antibacterial and so on. In addition to being used in clothing, functional textiles are also widely used in decoration, industrial use and other fields, among which water-repellent finishing has attracted more and more attention from consumers. [0003] Common water repellents on the market...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/18C08F220/14C08F220/20C08G18/12C08G18/66C08G18/61C08G18/46C08G18/48C08G18/67C08G18/34D06M15/263D06M101/06
CPCC08F283/008C08G18/12C08G18/6692C08G18/61C08G18/4676C08G18/4018C08G18/4854C08G18/4825D06M15/263D06M2101/06D06M2200/12D06M2200/50D06M2200/01C08F220/1818C08F220/14C08F220/1804C08F220/20C08F220/1806C08F220/1808C08G18/348C08G18/675
Inventor 杜金梅姚安康周攀飞许长海
Owner QINGDAO UNIV