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Polyacrylate/nanometer ZnO composite finishing agent and preparation method thereof

A polyacrylate and acrylate technology, which is applied in the field of polyacrylate/nano ZnO composite finishing agent and its preparation, can solve the problems of water resistance and poor sanitation performance, and achieve improved water resistance, good thermal stability, and better performance in large surface effect

Active Publication Date: 2012-01-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a polyacrylate / nanometer ZnO composite coating agent and its preparation method which is transparent, soft and non-tacky, to solve the current Defects such as "hot stickiness and cold brittleness", water resistance and poor hygienic performance of existing polyacrylate coating agents

Method used

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  • Polyacrylate/nanometer ZnO composite finishing agent and preparation method thereof
  • Polyacrylate/nanometer ZnO composite finishing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Adjust the pH of the aqueous solution containing 2wt% polyacrylic acid to 6, add 0.5wt% spherical nano-ZnO powder therein, magnetically stir for 10 minutes, ultrasonically for 10 minutes, then add 4 wt% surfactant sodium lauryl sulfate and stir evenly; The solution was transferred into a three-necked flask, heated to 58°C in a water bath, stirred for 20 minutes, and 1 / 3 of mixed monomers of butyl acrylate and methyl methacrylate were added (the mixed monomers accounted for 22 wt% of the total mass of the system, and the two monomers The molar ratio is 3:2), and the temperature was raised to 70°C for 30 minutes; the remaining mixed monomers and 0.5wt% ammonium persulfate aqueous solution were added dropwise, and after the addition was completed, the temperature was raised to 80°C for 2 hours; Ammonia solution to adjust the pH of the emulsion to 6 to obtain a nanocomposite coating agent.

Embodiment 2

[0026] Adjust the pH of the aqueous solution containing 0.6wt% polymethacrylic acid to 5.5, add 0.6wt% flower-shaped nano-ZnO powder to it, stir magnetically for 10 minutes, ultrasonicate for 10 minutes, and then add 2 wt% mixed surfactant sodium lauryl sulfate , Alkylphenol ether sulfosuccinate sodium salt (the mass ratio of the two surfactants is 1:1) and stir evenly; transfer the above solution into a three-necked flask, heat it in a water bath to 60°C, stir for 20min, add 1 / 4 The mixed monomer of ethyl acrylate and methyl methacrylate (the mixed monomer accounts for 25 wt% of the total mass of the system, and the molar ratio of the two monomers is 3:2), the temperature is raised to 73°C for 30min; After the remaining mixed monomers and 0.7wt% ammonium persulfate aqueous solution were added dropwise, the temperature was raised to 80°C for 2 hours of heat preservation reaction; ammonia aqueous solution was added at room temperature, and the pH of the emulsion was adjusted to ...

Embodiment 3

[0028] Adjust the pH of the aqueous solution containing 3wt% polyacrylamide to 5, add 1.5wt% rod-shaped nano-ZnO powder into it, stir magnetically for 10 minutes, ultrasonicate for 10 minutes, then add 3 wt% surfactant sodium dodecylbenzene sulfonate and stir evenly ; Move the above solution into a three-necked flask, heat it in a water bath to 60°C, stir for 20 minutes, add 1 / 3 of the mixed monomer of butyl acrylate and butyl methacrylate (the mixed monomer accounts for 24 wt% of the total mass of the system, two The molar ratio of the two monomers is 1:1), and the temperature was raised to 72°C for 30 minutes; the remaining mixed monomers and 0.6wt% potassium persulfate aqueous solution were added dropwise, and after the addition was completed, the temperature was raised to 82°C for 2 hours; Ammonia solution is added at room temperature to adjust the pH of the emulsion to 6 to obtain a nanocomposite coating agent.

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Abstract

The invention relates to a polyacrylate / nanometer ZnO composite finishing agent suitable for the base coating of clothing leathers, instep leathers and corrected leathers and a preparation method of the polyacrylate / nanometer ZnO composite finishing agent. The polyacrylate / nanometer ZnO composite finishing agent comprises the following raw materials by weight: 22wt%-28wt% of acrylic ester monomer, 2wt%-5wt% of emulsifying agent, 0.4 wt%-0.8 wt% of initiating agent, 0.2wt%-1.5 wt% of nanometer ZnO, 0.6 wt%- 5wt% of water-solubility high polymer materials, and the rest of deionized water. The preparation method comprises the following steps of: firstly, carrying out surface modification on the nanometer ZnO by adopting a water-solubility high molecular polymer, enabling the nanometer ZnO tobe uniformly dispersed in a water solution, then triggering the acrylic ester monomer to polymerize in site, and preparing the polyacrylate / nanometer ZnO composite finishing agent. Compared with the pure polyacrylate emulsion, the polyacrylate / nanometer ZnO composite finishing agent has the advantages that the water tolerance, the elongation at break, the air permeability and the water vapor permeability of a finished leather sample are all substantially increased.

Description

technical field [0001] The invention belongs to the technical field of leather finishing agents, and in particular relates to a polyacrylate / nano-ZnO composite finishing agent suitable for bottom coating of garment leather, shoe upper leather and repaired leather and a preparation method thereof. technical background [0002] With the rapid development of the leather industry, my country has become a major leather producer in the world and one of the most active and promising markets for leather trade. As an important process in the production of leather products, leather finishing can not only increase the aesthetics of the leather surface and improve the durability of the leather, but also correct the surface defects of the leather and expand the use range and value of the leather. As the top coating material of leather, leather finishing agent has a vital impact on the appearance, hygienic performance and physical and mechanical properties of leather products. [0003] P...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D7/12C14C11/00C09D133/08C09D133/10C09D125/14C08F220/18C08F2/24C08F220/14C08F212/08
Inventor 马建中刘俊莉鲍艳吕斌刘易弘鲁娟
Owner SHAANXI UNIV OF SCI & TECH
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