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Auxiliary-dyeing environmental amphoteric fatliquoring agent and preparation method thereof

A kind of fatliquoring agent and amphoteric technology, which is applied in the field of preparation of dyeing-assisting environmentally friendly amphoteric fatliquoring agent, can solve the problems of leather dyeing not deep and fast, and achieve the effect of not being easy to deep pollution

Inactive Publication Date: 2019-04-23
广东西顿新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the leather dyeing is not deep and not firm, the present invention is to provide a kind of amphoteric fatliquor and preparation method thereof synthesized as main raw materials with fatty acid, N-methyldiethanolamine and maleic anhydride, according to the preparation of the present invention The molecular structure of the product prepared by the method contains functional groups such as carboxyl group, sulfonic acid group and tertiary amine group. The tertiary amine is positively charged under acidic conditions, which can provide more binding points for anionic dyes and play a role in dyeing aids. effect

Method used

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  • Auxiliary-dyeing environmental amphoteric fatliquoring agent and preparation method thereof
  • Auxiliary-dyeing environmental amphoteric fatliquoring agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, a kind of preparation method of dye-assisted environmental protection amphoteric fatliquor, comprising the following steps:

[0024] (1) Esterification reaction: with a thermometer, N 2 Into the constant temperature reactor of the introduction pipe, the reflux condenser and the mechanical stirring device, calculated in parts by mass, add 20.0 parts of lauric acid and stir, heat up to 60 ° C to make it melt, then add 0.20 parts of hypophosphorous acid, and finally add 11.9 parts of lauric acid part of N-methyldiethanolamine, the temperature was raised to 180°C and the reaction was incubated for 6 hours.

[0025] (2) Maleic anhydride esterification reaction: when the temperature of the system is lowered to 75°C, add 9.8 parts of maleic anhydride solid to the system, add 0.10 part of p-toluenesulfonic acid after the solid is melted, and control the temperature of the system to 95°C The reaction was carried out for 3 hours.

[0026] (3) Sulfonation reaction:...

Embodiment 2

[0027] Embodiment 2, a kind of preparation method of dye-assisting environment-friendly amphoteric fatliquor, comprising the following steps:

[0028] (1) Esterification reaction: with a thermometer, N 2 Into the thermostatic reactor of the introduction pipe, the reflux condenser and the mechanical stirring device, calculated in parts by mass, add 22.8 parts of myristic acid and stir, heat up to 65°C to make it melt, then add 0.24 parts of hypophosphorous acid, and finally add 11.9 parts of myristic acid. part of N-methyldiethanolamine, the temperature was raised to 185°C and the reaction was incubated for 5.8 hours.

[0029] (2) Maleic anhydride esterification reaction: when the temperature of the system is lowered to 78°C, add 9.8 parts of maleic anhydride solid to the system, add 0.12 part of p-toluenesulfonic acid after the solid is melted, and control the system temperature to 98°C The reaction was carried out for 2.8 hours.

[0030] (3) Sulfonation reaction: the above ...

Embodiment 3

[0031] Embodiment 3, a kind of preparation method of dye-assisted environmental protection amphoteric fatliquor, comprising the following steps:

[0032] (1) Esterification reaction: with a thermometer, N 2 Into the constant temperature reactor of the introduction pipe, the reflux condenser and the mechanical stirring device, calculated in parts by mass, add 25.6 parts of palmitic acid and stir, heat up to 75 ° C to make it melt, then add 0.26 parts of hypophosphorous acid, and finally add 11.9 parts of part of N-methyldiethanolamine, the temperature was raised to 190°C and the reaction was incubated for 5.5 hours.

[0033] (2) Maleic anhydride esterification reaction: when the temperature of the system is lowered to 80°C, add 9.8 parts of maleic anhydride solid to the system, add 0.13 part of p-toluenesulfonic acid after the solid is melted, and control the temperature of the system to 100°C The reaction was carried out for 2.5 hours.

[0034] (3) Sulfonation reaction: the ...

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Abstract

The invention discloses an auxiliary-dyeing amphoteric fatliquoring agent preparation method, which includes the following specific steps: firstly esterifying fatty acid with N-methyldiethanolamine; esterifying and modifying a system with maleic anhydride; and then preforming a sulfite sulfonation reaction to obtain a linear amphoteric fatliquoring agent containing carboxyl, sulfonic acid group and tertiary amine in a molecular structure. A fatliquoring result shows that after the blue wet leather is treated by the auxiliary-dyeing amphoteric fatliquoring agent, the depth and concentration ofthe color of the crust leather are improved. The tertiary amine group on the fatliquoring agent can be positively charged after being protonated by acid, can provide more binding points for anionic dyes, and has a hyperchromic effect.

Description

technical field [0001] The invention belongs to the field of leather chemical synthesis, and in particular relates to a preparation method of a dye-assisting environment-friendly amphoteric fatliquoring agent. Background technique [0002] Leather fatliquors are generally dominated by anionic fatliquors. Since anionic fatliquors and anionic dyes have the same charge, there is a competitive relationship between the two during processing. The color of the dyed skin embryo will be slightly lighter after fatliquoring, resulting in color difference and affecting the quality of the product. [0003] The long-chain alkyl fatty acid was esterified with N-methyldiethanolamine and triethanolamine, and then quaternized by an alkylating agent to synthesize a double long-chain ester quaternary ammonium salt. The obtained product has high active content, light color, excellent biodegradability, low ecotoxicity, and excellent environmental compatibility; it can be used as fabric softener,...

Claims

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Application Information

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IPC IPC(8): C14C9/02
CPCC14C9/02
Inventor 毕俊林
Owner 广东西顿新材料科技有限公司
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