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Efficient fluoride-free waterproof agent with core-shell structure and preparation method thereof

A fluorine-free water repellent, core-shell structure technology, applied in textiles and papermaking, fiber treatment, liquid-repellent fibers, etc., can solve problems such as incompleteness, lack of crystal plane structure, and loss of waterproof performance

Inactive Publication Date: 2019-01-08
DYMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ordinary waterproofing agents containing long-chain alkyl groups have a certain loss of waterproof performance due to the lack or incomplete crystal structure. When the critical surface tension is close to liquids such as water and milk, these liquids will wet the fabric.

Method used

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  • Efficient fluoride-free waterproof agent with core-shell structure and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Take 45.00g octadecyl acrylate, 1.00g N-methylolacrylamide, 2.00g glycidyl acrylate, 18.00g tripropylene glycol, 102.22g deionized water, 1.75g ​​octadecyltrimethylammonium chloride, 1.75 g ER-20, 1.75g ​​ER-40, 0.088g dodecyl mercaptan and 0.02g acetic acid were mixed evenly, emulsified at high speed for 10 minutes to obtain a pre-emulsion, and then the pre-emulsion was homogenized by a high-pressure homogenizer to obtain an average particle size of 100nm lotion. Transfer the above liquid to a 250mL four-neck flask equipped with a stirrer, a thermometer, and a nitrogen introduction device for a condenser tube, pass nitrogen gas for 30 minutes, raise the temperature to 60°C, and then add 0.263g of azobisisobutylammonium hydrochloride aqueous solution, and keep the temperature for reaction 4 hours. Finally, the temperature of the system was lowered to room temperature, and 14.00g of isobornyl methacrylate, 0.25g of octadecyltrimethylammonium chloride, 0.25g of ER-20, 0....

Embodiment 2-6

[0073] Embodiment 2-6 has used the type and amount of waterproofing agent synthesis components as shown in Table 1. Meanwhile, the reaction equipment of embodiment 4-6 has used a high-pressure reactor, and other synthesis methods are the same as in embodiment 1 to obtain a solid content of 34%. Fluorine-free water repellent emulsion.

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Abstract

By selecting a long-chain alkyl ester acrylic monomer with a crystallization property to replace a fluorine substance, environmental friendliness is improve; and by selecting a special emulsifier withreactive groups and a special synthesis process, a fluoride-free waterproof agent with a core-shell structure is synthesized and waterproofness of the fluoride-free waterproof agent is improved. It should be noted that the preferred embodiments above should not be explained to limit the scope of the invention, and any improvement, variation or modification shall also fall within the protection scope of the invention without departing from the concept of the invention.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a high-efficiency fluorine-free waterproofing agent with a core-shell structure and a preparation method thereof. Background technique [0002] In the field of textile auxiliaries, the waterproof performance of fabrics is obtained by finishing with water-repellent dispersions. Its essence is to adsorb a layer of low surface energy substances on the surface of the fabric to achieve the purpose of water and oil repellency. Therefore, the lower the surface energy, the better the waterproof effect. At present, the most widely used waterproofing agent is the dispersion of fluorine-containing substances. , and the research is most active. Mainly polymers with perfluoroalkyl or perfluoroalkenyl or acrylic or methacrylic groups. In recent years, due to the enhancement of people's awareness of environmental protection, the use of fluorine-containing waterproofing agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/263D06M15/29C08F220/18C08F220/58C08F220/32
CPCC08F220/18C08F220/1818D06M15/263D06M15/273D06M15/29D06M2200/12C08F220/325C08F220/1811C08F220/58
Inventor 王彦兵吴涛刘平华刘军
Owner DYMATIC CHEM