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Method of preparing cation fatty acid softening agent

A fatty acid, cationic technology, applied in textiles, papermaking, fiber processing, etc., can solve problems such as unusability, yellowing, and reducing hand feel, and achieve the effects of wide application, improved whiteness, and reduced yellowing

Inactive Publication Date: 2009-08-19
深圳天鼎新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the cationic softener has the best hand feeling, low price, and is the most popular, but the fly in the ointment is that the yellowing becomes larger, and it cannot be used on light-colored and white fabrics that are sensitive to shade, nor can it be used with anionic additives (such as fluorescent whitening) agent) in the same bath, the scope of use is greatly limited
However, the weak cationic softener prepared in this way reduces the degree of yellowing due to the reduced cationicity, but it also reduces the hand feel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] After stearic acid is heated to 70-120°C to melt, diethylenetriamine is added to the molten stearic acid and mixed, wherein the molar ratio of stearic acid to diethylenetriamine is 2:1, and then added to account for the total amount of materials 0.01% KOH aqueous solution with a concentration of 30% is used as a catalyst, and under the protection of nitrogen with a flow rate of 1-5 L / min, the temperature is raised and reacted at a rate of 0.5-3° C. / min. Dehydration begins when the temperature rises to 120-130°C, and the reaction temperature is controlled at 125-130°C. After the anhydrous is distilled out, the water output is counted, and the acid value is less than or equal to 1.5, and the amide condensation reaction is completed. Then the amide condensation reaction product was cooled to 105-110°C, and the epichlorohydrin was weighed, wherein the molar ratio of epichlorohydrin to diethylenetriamine was 0.5:1, and the dropwise reaction was carried out with a constant pre...

Embodiment 2

[0025] After stearic acid is heated to 70-120°C to melt, diethylenetriamine is added to the molten stearic acid and mixed, wherein the molar ratio of stearic acid to diethylenetriamine is 2:1, and then added to account for the total amount of materials 0.01% KOH aqueous solution with a concentration of 30% is used as a catalyst, and under the protection of nitrogen with a flow rate of 1-5 L / min, the temperature is raised and reacted at a rate of 0.5-3° C. / min. Dehydration begins when the temperature rises to 120-130°C, and the reaction temperature is controlled at 125-130°C. After the anhydrous is distilled out, the water output is counted, and the acid value is less than or equal to 1.5, and the amide condensation reaction is completed. Then the amide condensation reaction product was cooled to 105-10°C, and dimethyl sulfate was weighed, wherein the molar ratio of dimethyl sulfate to diethylenetriamine was 0.5:1, and the constant pressure funnel was used for dropwise reaction ...

Embodiment 3

[0027] After stearic acid is heated to 70-120°C to melt, diethylenetriamine is added to the molten stearic acid and mixed, wherein the molar ratio of stearic acid to diethylenetriamine is 2:1, and then added to account for the total amount of materials 0.01% KOH aqueous solution with a concentration of 30% is used as a catalyst, and under the protection of nitrogen with a flow rate of 1-5 L / min, the temperature is raised and reacted at a rate of 0.5-3° C. / min. Dehydration begins when the temperature rises to 120-130°C, and the reaction temperature is controlled at 125-130°C. After the anhydrous is distilled out, the water output is counted, and the acid value is less than or equal to 1.5, and the amide condensation reaction is completed. Then cool down the amide condensation reaction product to 105-110°C, weigh dimethyl sulfate, wherein the molar ratio of dimethyl sulfate to diethylenetriamine is 0.5:1, and use a constant pressure funnel to carry out dropwise reaction at a temp...

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PUM

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Abstract

The invention discloses a method for the preparation of a cation fatty acid softening agent, comprising the following steps of: heating stearic acid to a melting state, adding diethylenetriamine into the melting liquid of the stearic acid to obtain a mixed liquid of the diethylenetriamine and the stearic acid, and adding a catalyst to subject the mixed liquid to an amide condensation reaction; adding an alkylating reagent into the products of the amide condensation reaction so as to implement an alkylation reaction; and adding a non-ionic surfactant and polyvinyl pyrrolidone into the products of the alkylation reaction and then cooling to obtain the cation fatty acid softening agent. The invention improves the softness by employing the alkylating reagent that is cationically stronger than acetic acid, enhances whiteness by the addition of the polyvinyl pyrrolidone, and uses the non-ionic surfactant in the process of the preparation so that the obtained softening agent can be used in one-bath with an anionic auxiliary agent so as to overcome the defects of the prior art, therefore, a cation fatty acid soft-flake softening agent having good hand feeling, high whiteness and low yellowing is obtained.

Description

technical field [0001] The invention relates to the preparation of a fatty acid fabric softener, in particular to a preparation method of a cationic fatty acid softener. Background technique [0002] Fatty acid fabric softeners are divided into cationic, nonionic and anionic. Among them, the cationic softener has the best hand feeling, low price, and is the most popular, but the fly in the ointment is that the yellowing becomes larger, and it cannot be used on light-colored and white fabrics that are sensitive to shade, nor can it be used with anionic additives (such as fluorescent whitening) agent) in the same bath, the scope of use is greatly limited. Non-ionic softeners have good whiteness and can be used on all fabrics. They can be used in the same bath with anionic additives or cationic additives, but their hand feeling is poor and the price is high. The anionic softener feels the worst, and it can be used in the same bath as the dyeing auxiliaries. [0003] In order...

Claims

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Application Information

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IPC IPC(8): D06M13/402D06M15/356
Inventor 詹其乐丁之邹小芬张书立
Owner 深圳天鼎新材料有限公司
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