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Method for preparing fabric softening agent

A fabric softener, unsaturated technology, applied in the preparation of fabric softener, the preparation of diester Jimich quaternary ammonium salt fabric softener, can solve the problem of reducing softness and solubility, single diester component, poor biodegradation and other problems, to achieve excellent soft performance and antistatic performance, low ecotoxicity, and to overcome environmental pollution problems

Inactive Publication Date: 2011-08-24
HENAN TITANING CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1990s, in the world, D1821 was widely used as a fabric softener due to its excellent softness. However, due to its poor biodegradation, it is not easy to prepare high-concentration products, and it is easily absorbed by sludge in sewage treatment. Adsorption causes environmental pollution and is gradually banned by developed countries
At present, esterquats prepared with fatty acids and triethanolamine as the main raw materials occupy more than 80% of the European market. Among esterquats, diesterquats have the best flexibility, but stearic acid Triethanolamine quaternary ammonium salt is difficult to make a single diester component, and the presence of triester will greatly reduce its softness and solubility
There is no domestic use of fatty alcohols, unsaturated acids, alcohol amines, halogenated alkanes, and quaternizing agents as raw materials to prepare diester Gemini quaternary ammonium salts through esterification, addition, substitution, and quaternization reactions. agent reports

Method used

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  • Method for preparing fabric softening agent
  • Method for preparing fabric softening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: In a 100ml four-neck flask equipped with a thermometer, a stirrer, and a condenser, add 27.05g of stearyl alcohol, and under a nitrogen atmosphere, stir and heat up to 60-80°C to melt it all, then add 0.01 g hydroquinone, 7.21g acrylic acid, 0.87g p-toluenesulfonic acid; continue to pass nitrogen, heat up to 100°C and stir the reaction until the acid value <0.5mgKOH / g to complete the reaction, cool down, neutralize and wash with lye to remove the catalyst, Then, it was washed with water to neutrality, and the obtained product was dried in a vacuum oven at 60° C. to obtain white waxy solid stearyl acrylate.

[0026] In a 100ml four-neck flask equipped with a thermometer, a stirrer, and a condenser, add 32.40g of octadecyl acrylate, weigh 5.81g of ethanolamine and place it in a constant pressure dropping funnel, heat up to 85°C with nitrogen gas, and add ethanolamine dropwise. Reaction at 85°C for 5h gave secondary amine.

[0027] In a 100ml four-necked flask ...

Embodiment 2

[0029] Example 2: In a 100ml four-neck flask equipped with a thermometer, a stirrer, and a condenser, add 27.05g of stearyl alcohol, under a nitrogen atmosphere, stir and heat up to 60-80°C to melt it all, then add 0.0207 g hydroquinone, 14.40g acrylic acid, 1.04g p-toluenesulfonic acid; continue to pass nitrogen, heat up to 135°C and stir the reaction until the acid value <0.5mgKOH / g to complete the reaction, cool down, neutralize and wash with lye to remove the catalyst, Then, it was washed with water to neutrality, and the obtained product was dried in a vacuum oven at 60° C. to obtain white waxy solid stearyl acrylate.

[0030]In a 100ml four-necked flask equipped with a thermometer, a stirrer, and a condenser, add 32.41g of octadecyl acrylate, weigh 7.32g of ethanolamine and place it in a constant-pressure dropping funnel, heat up to 120°C with nitrogen gas, and add ethanolamine dropwise. React at 120°C for 12h to obtain secondary amine.

[0031] In a 100ml four-necked f...

Embodiment 3

[0033] Example 3: In a 100ml four-necked flask with a thermometer, a stirrer, and a condenser, add 27.05g of stearyl alcohol, under a nitrogen atmosphere, stir and heat up to 60-80°C to melt it all, then add 0.024 g hydroquinone, 21.60g acrylic acid, 1.21g p-toluenesulfonic acid; continue to pass nitrogen, heat up to 165°C and stir the reaction until the acid value <0.5mgKOH / g to complete the reaction, cool down, neutralize and wash with lye to remove the catalyst, Then, it was washed with water to neutrality, and the obtained product was dried in a vacuum oven at 60° C. to obtain white waxy solid stearyl acrylate.

[0034] In a 100ml four-neck flask equipped with a thermometer, a stirrer, and a condenser, add 32.40g of octadecyl acrylate, weigh 9.76g of ethanolamine and place it in a constant pressure dropping funnel, heat up to 160°C with nitrogen gas, and add ethanolamine dropwise. React at 160°C for 12h to obtain secondary amine.

[0035] In the 100ml four-necked flask wi...

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Abstract

The invention discloses a method for preparing fabric softening agent. The method is characterized in that: long-chain fatty alcohol and unsaturated acid undergo esterification reaction, then the esterification product and alcohol amine undergo addition reaction to form secondary amine, the secondary amine and halogenated hydrocarbon undergo substitution reaction to form tertiary amine, and the tertiary amine and a quaternization reagent are reacted to form the fabric softening agent; and the fabric softening agent has the following structure, wherein R1 is alkyl of C1 to C4 or -CH2CH(OH)CH3, R2 is straight-chain or branch-chain alkyl of C1 to C3, R3 is saturated alkyl with 12 to 22 carbon atoms, x and y are 2 to 6, and X represents negative ions combined with positive ions. The product prepared by the method is a double-ester Gemini quaternary ammonium salt softening agent; by using the Gemini structure and introducing the alcohol ethyl, the problems of poor dissolubility, strong greasy feeling and poor wetting property and air permeability of the conventional softening agent (D1821) are solved; and the softening agent has more excellent softening performance and antistatic performance compared with common ester-based quaternary ammonium salts.

Description

technical field [0001] The invention relates to a method for preparing a fabric softener, in particular to a method for preparing a diester Gemini quaternary ammonium salt fabric softener, and belongs to the technical field of organic compound synthesis. Background technique [0002] Fabric softener is a daily-use chemical product that can give clothes and fabrics a soft and pleasant feeling when wearing and using them. With the development of synthetic detergents, it has gradually entered the households of ordinary people from the textile industry and has become a part of people's daily clothing. Washing care products. The main function of the fabric softener is to improve the fabric feel and prevent static electricity, and it can also give the fabric a fresh and pleasant taste. In addition, the softener can also be used in the fiber industry to increase the softness of the fabric and improve the wear resistance and tear resistance of the fabric. Crack strength. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/467C07C211/63C07C209/12C07C209/22
Inventor 牛华彭雪萍娄平均朱红军丁徽韩磊
Owner HENAN TITANING CHEM TECH
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