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A kind of environment-friendly low-carbon foaming agent for artificial leather and preparation method thereof

A technology of artificial leather and foaming agent, which is applied in the field of environmentally friendly low-carbon foaming agent for artificial leather and its preparation, and can solve the problems of failure to meet the temperature requirements of the coating method and calendering method of artificial leather, the toxicity of AC foaming agent and the yellowing resistance of finished leather Change, not suitable for artificial leather production process and other issues, to achieve the effect of improving hand feel, reducing energy consumption, and easy performance

Active Publication Date: 2017-11-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-temperature environment-friendly foaming agent prepared by this invention is to reduce the decomposition temperature of the AC foaming agent and reduce energy consumption through the active auxiliary agent, but the foaming agent has complex components, and the compatibility of each component with the artificial leather slurry is poor, and the The foam temperature is unstable, and the decomposition products still contain azo compounds, and the toxicity of the AC foaming agent and the yellowing resistance of the finished leather are not fundamentally solved.
[0006] Patent CN103012831A also provides a preparation method of a low-temperature foaming agent, which is suitable for the preparation process requirements of various rubbers. The decomposition products of the foaming agent will produce corrosive gases such as ammonia, which is not suitable for the production process of artificial leather. , unable to meet the temperature requirements of the artificial leather coating method and calendering method

Method used

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  • A kind of environment-friendly low-carbon foaming agent for artificial leather and preparation method thereof
  • A kind of environment-friendly low-carbon foaming agent for artificial leather and preparation method thereof
  • A kind of environment-friendly low-carbon foaming agent for artificial leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) First, measure 1 mol 4,4' -Oxobisbenzenesulfonyl hydrazide and 10 mol of absolute ethanol were added to a 1000 ml four-necked flask equipped with a condensing reflux tube, a stirrer, and a thermometer;

[0038] (2) Add 0.2 mol of anhydrous sodium sulfate and 0.1 mol of anhydrous magnesium sulfate to the obtained dispersion system, heat to 60 °C under stirring conditions, and condense to reflux;

[0039] (3) Slowly add 3.5 mol of acetone and 0.05 mol of glacial acetic acid that have been dewatered in advance into the dispersion system obtained in step (2) through a constant pressure funnel, and keep the temperature at 60 °C for 8 h;

[0040] (4) After the reaction is completed, cool down to room temperature, then filter the suspended matter obtained in step (3), reuse the filtrate (solvent), and then wash the solid matter with deionized water 2-3 times to remove impurities in the crude product. Sodium sulfate and anhydrous magnesium sulfate, and then use hot absolut...

Embodiment 2

[0043] (1) First mix 1 mol of measured benzenesulfonyl hydrazide with 10 mol of N,N -Dimethylformamide is added to a 2000 ml four-necked flask equipped with a condensing reflux tube, a stirrer, and a thermometer;

[0044] (2) Add a mixture of 0.1 mol of anhydrous sodium sulfate and 0.1 mol of anhydrous calcium chloride to the obtained dispersion system, heat to 85 °C under stirring conditions, and condense to reflux;

[0045] (3) Slowly add the mixed system of 1.5 mol methyl ethyl ketone, 0.02 mol glacial acetic acid and 0.005 mol citric acid that has been dehydrated in advance into the dispersion system obtained in step (2) with a constant pressure funnel, and the temperature is stabilized at 85 ℃, reaction 10h;

[0046] (4) After the reaction is completed, cool down to room temperature, then filter the suspended matter obtained in step (3), reuse the filtrate (solvent), and then wash the solid matter with deionized water 2-3 times to remove impurities in the crude product. ...

Embodiment 3

[0049] (1) First, add 2 mol of measured p-toluenesulfonylhydrazide and 20 mol of dimethyl sulfoxide into a 3000 ml four-necked flask equipped with a condensing reflux tube, a stirrer, and a thermometer;

[0050] (2) Add a mixture of 0.02 mol anhydrous sodium sulfate and 0.01 mol anhydrous magnesium sulfate to the obtained dispersion system, heat to 75 °C under stirring conditions, and condense to reflux;

[0051] (3) Slowly add the mixed system of 2.5 mol acetophenone, 0.04 mol glacial acetic acid and 0.01 mol lactic acid that has been dewatered in advance to the dispersion system obtained in step (2) with a constant pressure funnel, and the temperature is stabilized at 75 ℃, react for 10 h;

[0052] (4) After the reaction is completed, cool down to room temperature, then filter the suspended matter obtained in step (3), reuse the filtrate (solvent), and then wash the solid matter with deionized water 2-3 times to remove impurities in the crude product. Sodium sulfate and anh...

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Abstract

The invention discloses an environment-friendly low-carbon foaming agent for artificial leather and a preparation method thereof. A new type of foaming agent was synthesized by reacting a compound containing a sulfonyl hydrazide structure with a ketone compound containing a carbonyl group under certain conditions. This series of foaming agents is a white micro-powder, does not contain azo, is non-toxic and tasteless and is safe to store Stable, the decomposition temperature is higher than 180°C, the foaming temperature is between 190~200°C, and the expansion ratio is higher than 3.5. This new type of foaming agent solves the problems of poor compatibility between traditional AC foaming agent and blended foaming agent and artificial leather slurry, unstable foaming temperature, high energy consumption, toxicity of azo residues, and yellowing of finished leather. It has remarkable low-carbon and environment-friendly characteristics. The foaming agent has simple synthesis process, easy adjustment of foaming temperature, easy adjustment of foaming ratio, good physiological and environmental safety, and can be applied to artificial leather coating and calendering processes.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to an environment-friendly low-carbon foaming agent for artificial leather and a preparation method thereof. Background technique [0002] Foaming agent is a widely used auxiliary agent in the manufacturing process of artificial leather, which endows the leather with good foam feeling, fullness, elasticity and air permeability. In recent years, with the increasing demand for artificial leather, its output is also increasing. Traditional blowing agents include azodicarbonamide (AC), dinitrosopentamethylenetetramine (DPT), sulfonyl hydrazide, etc. Among them, AC blowing agents account for about 90% of the consumption of chemical blowing agents . [0003] The decomposition temperature of traditional AC foaming agent is 216 ℃, and the foaming temperature is usually between 210-220 ℃. Such a high foaming temperature will seriously increase the energy consumption of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C311/49C07C303/40C08J9/10
Inventor 范浩军郭学方陈意颜俊王芳石碧汪峰
Owner SICHUAN UNIV
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