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Preparation method of water-based photoresponse self-repairing leather finishing agent

A leather finishing agent and light-responsive technology, which is applied in leather surface treatment, textile/flexible product manufacturing, small raw leather/big raw leather/leather/fur treatment, etc. It can solve the problem of no self-healing ability and solve the problem of surface damage , good stability and good self-healing ability

Active Publication Date: 2021-06-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a method for preparing a water-based light-responsive self-repairing leather finishing agent, which solves the problem that the fluorine-containing polyacrylate finishing agent in the prior art has no self-repairing ability

Method used

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  • Preparation method of water-based photoresponse self-repairing leather finishing agent

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preparation example Construction

[0063] The preparation method of amphiphilic nanocellulose is:

[0064] a. Preparation of diblock copolymers containing carboxyl and epoxy units

[0065] Weigh 4,4'-azobis(4-cyanovaleric acid), carboxyl-containing hydrophilic macromolecular RAFT reagent, glycidyl methacrylate, 1, 4-dioxane, placed in a three-necked flask equipped with a magnet, stirred and dissolved to form a mixed solution;

[0066] At room temperature, argon was first introduced into the flask containing the mixed solution for 30 minutes, and then the three-necked flask was heated to 60°C to make 4,4'-azobis(4-cyanovaleric acid), carboxyl-containing hydrophilic The macromolecular RAFT reagent and glycidyl methacrylate were reacted under argon protection for 6h to obtain the product;

[0067] After the product is purified by precipitation in n-hexane, it is dried in a vacuum oven to obtain a diblock copolymer containing carboxyl and epoxy units;

[0068] b. Preparation of anionic UV-responsive block copoly...

Embodiment 1

[0075] A preparation method of an aqueous light-responsive self-healing leather finishing agent, which is specifically implemented according to the following steps:

[0076] Step 1. Preparation of mixed monomer and initiator aqueous solution

[0077] Step 1.1, weigh butyl methacrylate, methyl methacrylate, hexafluorobutyl acrylate and 7-(6-(acryloyloxyhexyloxy)- 4-methylcoumarin; mixed monomer is obtained after mixing uniformly;

[0078] Step 1.2, weigh ammonium persulfate and deionized water at a mass ratio of 1:20, respectively, obtain an aqueous initiator solution after mixing, and take out 1 / 3 of the total mass of the aqueous initiator solution for subsequent use;

[0079] Wherein, the mass of the initiator is 0.8% of the mass of the mixed monomer;

[0080] Step 2. Preparation of amphiphilic nanocellulose dispersion

[0081] Step 2.1. Weigh the amphiphilic nanocellulose powder and the aqueous sodium bicarbonate solution at a mass ratio of 2:4000;

[0082] Step 2.2, tak...

Embodiment 2

[0092]A preparation method of a water-based light-responsive self-repairing leather finishing agent, specifically implemented according to the following steps:

[0093] Step 1, preparation of mixed monomer and initiator aqueous solution

[0094] Step 1.1, Weigh butyl acrylate, methyl methacrylate, hexafluorobutyl methacrylate and 7-(2-methacryloyloxy)-4- Methyl coumarin; after mixing evenly, a mixed monomer is obtained;

[0095] Step 1.2, weigh potassium persulfate and deionized water respectively according to the mass ratio of 1:50, mix uniformly to obtain the initiator aqueous solution, take out 1 / 3 of the total mass of the initiator aqueous solution, and set aside;

[0096] Wherein, the quality of initiator is 1% of mixed monomer quality;

[0097] Step 2, preparation of amphiphilic nanocellulose dispersion

[0098] Step 2.1, weighing the amphiphilic nanocellulose powder and sodium hydroxide aqueous solution respectively according to the mass ratio of 4:3400;

[0099] St...

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Abstract

The invention discloses a preparation method of a water-based photoresponse self-repairing leather finishing agent. By taking amphiphilic nano cellulose as a Pickering stabilizer and a mixture of an acrylate first monomer, an acrylate second monomer, a fluorine-containing acrylate monomer and a vinyl coumarin monomer as an oil phase, emulsification is performed to obtain a Pickering emulsion; and the water-based photoresponse self-repairing leather finishing agent is prepared through a Pickering soap-free emulsion polymerization technology. The preparation method of the water-based photoresponse self-repairing leather finishing agent solves the problem that a fluorine-containing polyacrylate finishing agent in the prior art does not have self-repairing capability.

Description

technical field [0001] The invention relates to the technical field of intelligent polymer materials, in particular to a preparation method of an aqueous light-responsive self-healing leather finishing agent. Background technique [0002] Leather products such as bags, gloves, belts, etc. have become indispensable daily necessities in people's lives because of their good quality, feel and breathability. Raw hides often require a series of processing before they become leather products. Among them, finishing is the most critical step to enhance the beauty of leather, prolong the service life of leather, significantly improve the quality and grade of leather products, and increase commercial value. Currently widely used leather finishing materials are fluorine-containing acrylates, which have excellent film-forming properties, adhesion, hydrophobicity and oleophobicity, and thermal stability. However, the surface of painted leather products is prone to various damages during...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/24C08F220/30C08F2/22C08F2/38C14C11/00
CPCC08F220/1804C08F220/14C08F2/22C08F2/38C14C11/003C08F220/24C08F220/303Y02P70/62
Inventor 周建华王雪丽
Owner SHAANXI UNIV OF SCI & TECH
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