Dendriform cationic leather fixing agent and preparation method thereof

A technology of cationic etherification agent and color-fixing agent, which is applied in dyeing, textile and papermaking, fiber treatment, etc. It can solve the problems of leather rough surface, low activity, large usage, etc., to achieve increased fastness, small dosage, The effect of reducing dosage

Inactive Publication Date: 2010-03-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a dendritic cationic leather color-fixing agent and a preparation method thereof, so as t

Method used

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  • Dendriform cationic leather fixing agent and preparation method thereof
  • Dendriform cationic leather fixing agent and preparation method thereof

Examples

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Example Embodiment

[0035] Example 1:

[0036] (1) Synthesis of dendritic polyamide-amine of generation 0.5-1.0 generation

[0037] Synthesis of 0.5-generation dendritic polyamide-amine: mix methyl acrylate and ethylenediamine at a molar ratio of 1:6 in an ice water bath, add 30% of the total volume of the reaction system to anhydrous methanol as a solvent, and stir to react at room temperature After 10 hours, vacuumize at 30°C, and spin distillation for 1.5 hours at a vacuum of 0.08 MPa to remove the solvent and excess methyl acrylate to obtain a 0.5-generation dendritic polyamide-amine;

[0038] Synthesis of 1.0 generation dendritic polyamide-amine: 0.5 generation dendritic polyamide-amine and ethylenediamine are mixed in an ice water bath at a molar ratio of 1:24, and 20% of the total volume of the reaction system is added to anhydrous methanol As a solvent, after stirring the reaction at room temperature for 20 hours, vacuum at 80°C, add 3% of the total mass of the reactants toluene and anhydrous m...

Example Embodiment

[0041] Example 2:

[0042] (1) Synthesis of dendritic polyamide-amine of generation 0.5-1.0 generation

[0043] Synthesis of 0.5-generation dendritic polyamide-amine: Mix ethyl acrylate and ethylenediamine at a molar ratio of 1:4 in an ice-water bath, add 20% of the total volume of the reaction system as a solvent, and stir at room temperature After 8 hours of reaction, vacuum at 40°C and rotary distillation for 1 hour at a vacuum of 0.07 MPa to remove solvent and excess ethyl acrylate to obtain 0.5 generation dendrimer polyamide-amine;

[0044] Synthesis of 1.0-generation dendritic polyamide-amine: The 0.5-generation dendritic polyamide-amine and ethylenediamine are mixed in an ice water bath at a molar ratio of 1:12, and 10% absolute ethanol of the total volume of the reaction system is added. As a solvent, after stirring the reaction at room temperature for 16 hours, vacuum at 80°C, add 2% of the total mass of the reactants, n-butanol, and rotary distillation for 1 hour at a vacu...

Example Embodiment

[0047] Example 3:

[0048] (1) Synthesis of dendritic polyamide-amine of generation 0.5-2.0

[0049] Synthesis of 0.5-generation dendritic polyamide-amine: mix butyl acrylate and ethylenediamine at a molar ratio of 1:7 in an ice-water bath, add 15% of the total volume of the reaction system to anhydrous methanol as a solvent, and stir at room temperature After 14 hours of reaction, vacuum at 50°C and rotary distillation for 1.5 hours at a vacuum of 0.08 MPa to remove solvent and excess butyl acrylate to obtain 0.5-generation dendritic polyamide-amine;

[0050] Synthesis of 1.0 generation dendritic polyamide-amine: 0.5 generation dendritic polyamide-amine and ethylenediamine were mixed in an ice water bath at a molar ratio of 1:16, and 20% of the total volume of the reaction system was added to anhydrous methanol As the solvent, after stirring the reaction at room temperature for 24 hours, vacuum at 70°C, add 2.5% of the total mass of the reactants, n-butanol, and rotary distillation...

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Abstract

The invention relates to a method for preparing a leather fixing agent, in particular to a dendriform cationic leather fixing agent and a preparation method thereof. To overcome the defects of low activity, high consumption and easily caused grain leather existing in the prior art, the invention adopts a technical scheme that: the method for preparing the dendriform cationic leather fixing agent comprises the following steps: (1) mixing organic amine and acrylic ester, adding a reaction solvent, stirring to react, vacuumizing, distilling by rotating, and removing the solvent and excessive acrylic ester to prepare dendriform PAMAM; and (2) mixing the dendriform PAMAM prepared in the step (1) with a cationic etherifying agent, adding a solvent, adding an extracting agent after reaction, andextracting for multiple times to prepare graft modified dendriform cationic leather fixing agent. Compared with the prior art, the method has the advantages of reducing the hydrolysis effect of dye, improving fastness of leather to wet rubbing, reducing the consumption of the dye, not influencing the hand feeling of the leather, and making the fixing agent biologically degraded easily.

Description

Technical field: [0001] The invention relates to a preparation method of a leather color-fixing agent, in particular to a dendritic cationic leather color-fixing agent and a preparation method thereof. Background technique: [0002] Dyeing leather can improve its appearance, make it suitable for the current popular style and obtain fashion, and maximize its added value. Direct dyes and acid dyes (anionic dyes) commonly used in leather mainly rely on van der Waals force and hydrogen bonds to combine with leather fibers. Their wet rubbing fastness is poor, and they are prone to fading and staining, which affects the appearance of leather products. The dyestuffs discharged into the environment with the waste water pollute the environment, restricting the development of the tanning industry. In order to overcome these phenomena, a large number of cationic color fixing agents are used in the industry to increase the dye molecules on the dyed matter, and at the same time, the hyd...

Claims

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Application Information

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IPC IPC(8): D06P5/08D06P5/10D06P1/52D06M15/61
Inventor 王学川强涛涛何林燕袁绪政
Owner SHAANXI UNIV OF SCI & TECH
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