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Dendriform cationic leather fixing agent and preparation method thereof

A technology of cationic etherifying agent and color-fixing agent, applied in dyeing method, textile and papermaking, fiber processing, etc., can solve the problems of large usage, rough leather surface, low activity, etc., to reduce dosage, increase fastness, small effect

Inactive Publication Date: 2012-05-09
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 to overcome the disadvantages of the prior art, such as low activity, large amount of use and easy to cause leather rough surface

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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Synthesis of dendritic polyamidoamines from generation 0.5 to generation 1.0

[0038] Synthesis of 0.5-generation dendritic polyamidoamine: 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 the reaction at room temperature After 10 hours, vacuumize at 30°C, and rotate distillation at a vacuum degree of 0.08MPa for 1.5 hours to remove the solvent and excess methyl acrylate to obtain 0.5 generation dendritic polyamide-amine;

[0039]Synthesis of 1.0 generation dendritic polyamidoamine: mix 0.5 generation dendritic polyamidoamine and ethylenediamine in an ice-water bath at a molar ratio of 1:24, add anhydrous methanol with 20% total volume of the reaction system As a solvent, after stirring and reacting at room temperature for 20 h, vacuumize at 80° C., and under a vacuum of 0.02 MPa, add entrainer toluene and anhydrous methanol (m (toluen...

Embodiment 2

[0043] (1) Synthesis of dendritic polyamidoamines from generation 0.5 to generation 1.0

[0044] Synthesis of 0.5-generation dendritic polyamidoamine: Mix ethyl acrylate and ethylenediamine at a molar ratio of 1:4 in an ice-water bath, add absolute ethanol with a total volume of 20% of the reaction system as a solvent, and stir at room temperature After reacting for 8 hours, evacuate at 40°C, and perform rotary distillation at a vacuum of 0.07 MPa for 1 hour to remove the solvent and excess ethyl acrylate to obtain 0.5 generation dendritic polyamide-amine;

[0045] Synthesis of 1.0-generation dendritic polyamidoamine: Mix 0.5-generation dendritic polyamidoamine and ethylenediamine in an ice-water bath at a molar ratio of 1:12, add 10% absolute ethanol to the total volume of the reaction system As a solvent, after stirring and reacting at room temperature for 16 hours, vacuumize at 80°C, and at a vacuum of 0.07 MPa, add an entrainer n-butanol with 2% of the total mass of the re...

Embodiment 3

[0049] (1) Synthesis of 0.5-2.0 generation dendritic polyamide-amine

[0050] Synthesis of 0.5-generation dendritic polyamidoamine: Mix butyl acrylate and ethylenediamine at a molar ratio of 1:7 in an ice-water bath, add anhydrous methanol with a total volume of 15% of the reaction system as a solvent, and stir at room temperature After reacting for 14 hours, evacuate at 50°C, and perform rotary distillation at a vacuum of 0.08 MPa for 1.5 hours to remove the solvent and excess butyl acrylate to obtain a 0.5 generation dendritic polyamide-amine;

[0051] Synthesis of the 1.0th generation dendritic polyamidoamine: mix the 0.5th generation dendritic polyamidoamine and ethylenediamine in an ice-water bath at a molar ratio of 1:16, add 20% of the total volume of the reaction system to anhydrous methanol As a solvent, after stirring and reacting at room temperature for 24 hours, vacuumize at 70°C, and at a vacuum of 0.08 MPa, add an entrainer n-butanol with 2.5% of the total mass o...

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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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Patent Type & Authority Patents(China)
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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