A kind of retanning agent with auxiliary dyeing effect and preparation method thereof

A retanning agent and a technology for its action, applied in the field of leather retanning materials, can solve the problems of environmental hazards, poor dye absorption effect, low utilization rate of the retanning agent, etc., and achieve the improvement of dyeing rate, dyeing performance, and physical machinery. performance effect

Active Publication Date: 2018-02-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of active groups of traditional retanning agents, the utilization rate of retanning agents is low, and the absorption effect on dyes is poor, resulting in the harm of dye liquor wastewater to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The raw materials for the preparation of hydroxyl-terminated hyperbranched polymers include hyperbranched polymer monomers, trimethylolpropane and catalysts. The catalysts are concentrated sulfuric acid, p-toluenesulfonic acid or concentrated hydrochloric acid, and the catalysts account for trimethylolpropane and hyperbranched polymerization 0.1 to 3.5% of the mass of the mixture of monomers, and the molar ratio of hyperbranched polymer monomers to trimethylolpropane is 1:0.5 to 1:4, wherein the raw materials for the preparation of hyperbranched polymer monomers include methyl acrylate The methanol solution of ester and diethanolamine, and the molar ratio of methyl acrylate to diethanolamine is 1:0.5~1:4, and the mass ratio of diethanolamine to methanol is 1:0.5~1:20.

[0027] The preparation method of the above-mentioned retanning agent with dyeing aiding effect may further comprise the steps:

[0028] Step 1: Add N,N-methylenebisacrylamide and diethylenetriamine with ...

Embodiment 1

[0034] Step 1: Add N,N-methylenebisacrylamide and diethylenetriamine with a mass ratio of 1:0.5 into water, heat and react at 50°C for 9 hours to form an amino-terminated hyperbranched polymer, in which water The mass is 5 times that of diethylenetriamine;

[0035] Step 2: Add methyl acrylate dropwise to the methanol solution of diethanolamine, heat and react at 10°C for 1 hour, and then filter under 0.01MPa pressure for 10 minutes to obtain a hyperbranched polymer monomer, wherein methyl acrylate and The molar ratio of diethanolamine is 1:0.5; the mass ratio of diethanolamine to methanol is 1:0.5;

[0036] Step 3: Mix trimethylolpropane with the catalyst to obtain a mixture, add hyperbranched polymer monomers dropwise to the mixture, heat and react at 70°C for 1 hour, and generate hydroxyl-terminated hyperbranched polymers in a rotary evaporator , the vacuum degree of the rotary evaporator is 0.01MPa, the temperature is 100°C, and the rotation time is 20min, wherein the mola...

Embodiment 2

[0039] Step 1: Add N,N-methylenebisacrylamide and diethylenetriamine with a mass ratio of 1:2.5 into water, heat and react at 110°C for 36 hours to form an amino-terminated hyperbranched polymer, in which water The mass is 25 times that of diethylenetriamine;

[0040] Step 2: Add methyl acrylate dropwise to the methanol solution of diethanolamine, heat and react at 55°C for 20 hours, and then filter under 1 MPa pressure for 80 minutes to obtain a hyperbranched polymer monomer, wherein methyl acrylate and di The molar ratio of ethanolamine is 1:4; the mass ratio of diethanolamine to methanol is 1:20;

[0041] Step 3: Mix trimethylolpropane with the catalyst to obtain a mixture, add hyperbranched polymer monomers dropwise to the mixture, heat and react at 150°C for 20 hours, and generate hydroxyl-terminated hyperbranched polymers in a rotary evaporator , the vacuum degree of the rotary evaporator is 1MPa, the temperature is 140°C, and the rotation time is 150min, wherein the mo...

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PUM

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Abstract

The invention discloses a retanning agent with a dyeing assisting effect and a preparing method for the retanning agent. Firstly, N,N-methylene bisacrylamide and diethylenetriamine serve as raw materials, water serves as a solvent, and an amine terminated hyperbranched polymer is prepared; then a monomer reacts with trimethylolpropane to prepare a hydroxy terminated hyperbranched polymer; and finally, the prepared amine terminated hyperbranched polymer and the prepared hydroxy terminated hyperbranched polymer are compounded according to the mass ratio being 1:10-10:1, and the retanning agent with the dyeing assisting effect is obtained. The amine terminated hyperbranched polymer and the hydroxy terminated hyperbranched polymer are compounded to obtain the retanning agent with the dyeing assisting effect, the retanning agent is used in a retanning process, and therefore the thickening rate and the physical and mechanical properties of leather can be effectively improved, and the dyeing rate and the dyeing depth of dye can be increased.

Description

technical field [0001] The invention belongs to the technical field of leather retanning materials, and in particular relates to a retanning agent with dyeing aiding effect and a preparation method thereof. Background technique [0002] Retanning is one of the most important processes in leather production. It can increase the effect of main tanning, endow leather with specific properties, such as dyeability, grindability, and formability, and also enable leather to obtain some unique sensory properties. , such as elasticity, fullness, special grain state, etc. Due to the lack of active groups of traditional retanning agents, the utilization rate of retanning agents is low, and the absorption effect on dyes is poor, resulting in the harm of dye liquor wastewater to the environment. Contents of the invention [0003] The object of the present invention is to provide a kind of retanning agent with auxiliary dyeing effect and preparation method thereof, to overcome the defec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/22C08G83/00
CPCC08G83/005C08G83/006C14C3/22
Inventor 强涛涛高翔王学川任龙芳
Owner SHAANXI UNIV OF SCI & TECH
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