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An amphoteric polymer surfactant and a chrome-free tanned leather fatliquor containing the surfactant

A surfactant and amphoteric polymer technology, applied in the field of chrome-free tanned leather fatliquor, can solve environmental and human hazards, restrict leather and other problems, and achieve good salt resistance and good level dyeing effect

Active Publication Date: 2021-07-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fatliquors used in leather processing can be classified according to their charge: anionic fatliquors, cationic fatliquors, nonionic fatliquors and amphoteric fatliquors, among which anionic fatliquor is the most used This is mainly because the chrome tanning method is still the main method in production, but the chrome tanning method will cause certain harm to the environment and the human body, and this problem restricts the sustainable development of the leather industry.

Method used

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  • An amphoteric polymer surfactant and a chrome-free tanned leather fatliquor containing the surfactant
  • An amphoteric polymer surfactant and a chrome-free tanned leather fatliquor containing the surfactant
  • An amphoteric polymer surfactant and a chrome-free tanned leather fatliquor containing the surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Add 1-dodecyl-3-vinylimidazole bromide, acrylic acid, dimethylaminoethyl methacrylate and solvent ethanol into the reaction vessel at a molar ratio of 1:2:3. Under the action of 0.8% azobisisobutyronitrile initiator, the above reaction system was refluxed at 71°C for 7 hours, then the solvent ethanol was removed, and then the crude product was dialyzed in ethanol and water (1:3) for 48 hours to remove the unreacted brominated 1-dodecyl-3-vinylimidazole, acrylic acid and dimethylaminoethyl methacrylate, and then freeze-dried to obtain an amphoteric polymer surfactant.

[0030] Step 2: Study the decontamination ability of the synthetic amphoteric polymer surface activity, and use it to wash glassware and other stains.

[0031] Step 3: At the same time, compound amphoteric polymer surfactants with different types of oils to obtain different amphoteric polymer fatliquoring agents.

[0032] Step 4: applying the amphoteric polymer fatliquor synthesized above to the f...

Embodiment 2

[0034] Step 1: Add 1-dodecyl-3-vinylimidazole bromide, acrylic acid, dimethylaminoethyl methacrylate and solvent ethanol into the reaction vessel at a molar ratio of 1:3:2. Under the action of 1.0% azobisisobutyronitrile initiator, the above reaction system was refluxed at 73°C for 6h, and then the solvent ethanol was removed, and then the crude product was dialyzed in ethanol and water (1:3) for 48h to remove the unreacted brominated 1-dodecyl-3-vinylimidazole, acrylic acid and dimethylaminoethyl methacrylate, and then freeze-dried to obtain an amphoteric polymer surfactant.

[0035] Step 2: Study the decontamination ability of the synthetic amphoteric polymer surface activity, and use it to wash glassware and other stains.

[0036] Step 3: At the same time, compound amphoteric polymer surfactants with different types of oils to obtain different amphoteric polymer fatliquoring agents.

[0037] Step 4: applying the amphoteric polymer fatliquor synthesized above to the fatliqu...

Embodiment 3

[0043] Step 1: Add 1-dodecyl-3-vinylimidazole bromide, acrylic acid, dimethylaminoethyl methacrylate and solvent ethanol into the reaction vessel at a molar ratio of 1:1:4. Under the action of 1.2% azobisisobutyronitrile initiator, the above reaction system was refluxed at 76°C for 5 hours, and then the solvent ethanol was removed, and then the crude product was dialyzed in ethanol and water (1:3) for 48 hours to remove the unreacted brominated 1-dodecyl-3-vinylimidazole, acrylic acid and dimethylaminoethyl methacrylate, and then freeze-dried to obtain an amphoteric polymer surfactant.

[0044]Step 2: Study the decontamination ability of the synthetic amphoteric polymer surface activity, and use it to wash glassware and other stains.

[0045] Step 3: At the same time, compound amphoteric polymer surfactants with different types of oils to obtain different amphoteric polymer fatliquoring agents.

[0046] Step 4: applying the amphoteric polymer fatliquor synthesized above to th...

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Abstract

The invention discloses an amphoteric polymer surfactant with high-efficiency cleaning effect. The preparation method is as follows: 2 Under the protection of 1-dodecyl-3-vinylimidazole bromide, acrylic acid and dimethylaminoethyl methacrylate at a certain temperature, adding initiator azobisisobutyronitrile by carrying out in ethanol solution Preparation of Amphoteric Polymer Surfactants by Random Copolymerization. The invention also provides leather fatliquor of amphoteric polymer. The amphoteric polymer fatliquoring agent provided by the present invention contains carboxylic acid groups and cationic groups, which can effectively improve the reactivity with tanned leather base and improve the subsequent compatibility with wet finishing materials. The large molecular weight and the large number of hydrophobic long-chain alkyl groups on the molecular side chains have a good lubricating effect on the leather fibers, making the leather soft, and playing the role of fatliquoring and filling.

Description

technical field [0001] The invention relates to the technical field of amphoteric polymers, surfactants and fatliquoring agents, in particular to an amphoteric polymer, an amphoteric polymer surfactant and a chrome-free tanned leather fatliquor containing the amphoteric polymer. Background technique [0002] Fatliquoring is a crucial process in leather processing. It determines the softness, fullness and elasticity of the finished leather, and affects the physical and mechanical properties and hand characteristics of the finished leather such as strength and elongation, as well as the water absorption, water gas permeability and air permeability of the leather. The fatliquors used in leather processing can be classified according to their charge: anionic fatliquors, cationic fatliquors, nonionic fatliquors and amphoteric fatliquors, among which anionic fatliquor is the most used This is mainly because the chrome tanning method is still the main method in production at prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F220/06C08F226/06C14C9/02
CPCC08F220/34C14C9/02C08F220/06C08F226/06
Inventor 王学川郝东艳李季
Owner SHAANXI UNIV OF SCI & TECH