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Leveling and deepening fixing agent and preparation method thereof

A color-fixing agent and organic solvent technology, which is applied in the field of dyeing and darkening color-fixing agent and its preparation in leather dyeing and fatliquoring process. Low tension and good wetting performance

Inactive Publication Date: 2010-02-03
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing darkening and fixing agents are cationic. Improper use will cause a large amount of dyes to accumulate on the leather surface and cause color flowers, so the use is greatly restricted.

Method used

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  • Leveling and deepening fixing agent and preparation method thereof
  • Leveling and deepening fixing agent and preparation method thereof
  • Leveling and deepening fixing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 18.5g of dodecylamine and 30g of absolute ethanol into a dry four-necked glass flask equipped with a stirrer and a condenser, raise the temperature to 30°C, wait for the dodecylamine to melt, and after stirring evenly, slowly add epichlorohydrin dropwise. 18.5g, and then heat preservation reaction for 12h to obtain intermediate I. The temperature of the reaction system was raised to 60°C, 12.2 g of ethanolamine was added dropwise, and then the temperature was raised to 80°C, and the intermediate II was obtained by reacting for 6 hours. Cool the reaction system to 60°C, add 60g of chloroacetic acid aqueous solution (20g of chloroacetic acid + 40g of water) dropwise, and then add dropwise of 48g of sodium hydroxide aqueous solution (16g of sodium hydroxide + 32g of water), and raise the temperature to 80°C after the dropwise addition , Reaction 4h. After the reaction, the temperature was lowered to 60° C., and 96.8 g of water was added to adjust the active substance ...

Embodiment 2

[0039] Add 9.25g of dodecylamine, 13.5g of octadecylamine and 40g of absolute ethanol into a dry four-necked glass flask equipped with a stirrer and a condenser, raise the temperature to 55°C, wait until the long-chain fatty amine is melted, stir evenly, slowly Add 18.5 g of epichlorohydrin °C dropwise, and then keep warm for 6 hours to obtain intermediate I. The temperature of the reaction system was raised to 60°C, 12.2 g of ethanolamine was added dropwise, and then the temperature was raised to 80°C, and the intermediate II was obtained by reacting for 6 hours. Cool the reaction system to 60°C, add 60g of chloroacetic acid aqueous solution (20g of chloroacetic acid + 40g of water) dropwise, and then add dropwise of 48g of sodium hydroxide aqueous solution (16g of sodium hydroxide + 32g of water), and raise the temperature to 80°C after the dropwise addition , Reaction 4h. After the reaction, the temperature was lowered to 60° C., and 96.0 g of water was added to adjust the...

Embodiment 3

[0041] Add 18.5g of dodecylamine and 35g of absolute ethanol into a dry four-necked glass flask equipped with a stirrer and a condenser, raise the temperature to 30°C, wait for the long-chain fatty amine to melt, and after stirring evenly, slowly add epichlorohydrin dropwise ℃ 19.5g, and then keep warm for 12h to obtain intermediate I. The temperature of the reaction system was raised to 60°C, 6.51 g of monomethylamine was added dropwise, and then the temperature was raised to 70°C, and the reaction was carried out for 8 hours to obtain intermediate II. Cool the reaction system to 60°C, add 59.8g of chloroacetic acid aqueous solution (19.8g of chloroacetic acid + 40g of water) dropwise, and then add 46.8g of sodium hydroxide aqueous solution (16.8g of sodium hydroxide + 30g of water) dropwise. Raise the temperature to 80°C and react for 4h. After the reaction, the temperature was lowered to 60° C., and 38.7 g of water was added to adjust the active substance content to 30%, a...

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Abstract

The invention discloses a leveling and deepening fixing agent and a preparation method thereof. The leather leveling and deepening fixing agent is a dyeing assistant with the functions of leveling, deepening and fixing colors, and an assistant molecule comprises the groups of -NR2, -NH2, -NHR, -COONa, and the like and is a compound with an amphoteric structure. Under an alkaline condition, the molecule carries negative charge and has a leveling function for dyeing acid dye, the auxochromic groups of -NR2, -NH2, -NHR, and the like on the assistant molecule act on the dye to deepen the color andplay a deepening function. Under an acidic condition, the groups of -NR2, -NH2, -NHR, and the like have positive charge and play a fixing function for the acid dye. The assistant is a multifunctionalproduct, can play the functions of leveling, deepening and fixing colors for dying leather and can simplify a leather preparing technology.

Description

technical field [0001] The invention belongs to the technical field of leather chemical industry, and relates to a dyeing leveling, darkening and fixing agent used in leather dyeing and fatliquoring process and a preparation method thereof. Background technique [0002] Leather dyeing not only needs to give the leather a pure color tone, but also requires bright, uniform color and high dyeing fastness. In recent years, with the continuous improvement of the grade of leather products, higher requirements have been put forward for leather dyeing. In addition to the uniform color, there are also requirements for the brightness and fullness of the color, dry and wet friction resistance, light resistance, and light resistance. Water washability and migration resistance of dyes in finished leather have certain requirements. To meet these requirements, in addition to selecting high-performance leather dyes, adjusting the tanning process, and improving the dyeing operation technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/647D06P3/32
Inventor 邹祥龙兰云军银德海柴玉叶
Owner WENZHOU UNIVERSITY
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