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Nano TiO2 modified polyacrylate coating agent

A polyacrylate and finishing agent technology, applied in the field of leather chemicals, can solve the problems of poor water resistance, large specific surface area, and high surface energy, and achieve the effects of improving mechanical properties, large contact area, and large specific surface area

Inactive Publication Date: 2015-05-13
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyacrylate emulsion and its coating film have better weather resistance, transparency, natural drying performance, and good gloss (not easy to turn yellow); especially have excellent adhesion, and occupy an important position in leather finishing agents, but their own Inherent disadvantages: poor water resistance, poor moisture permeability, low hardness of the coating film, "cold and brittle hot sticky", poor flexibility, etc., which greatly limit its application
However, due to the small particle size and large specific surface area of ​​nano-titanium dioxide, the surface atoms are seriously insufficiently coordinated, the surface energy is high, and it is in a non-thermodynamic stable state. worse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A nano-titanium dioxide modified polyacrylate finishing agent, comprising:

[0033] a, 350 parts of deionized water;

[0034] b, 0.5 parts of initiator;

[0035] c, 5.2 parts of emulsifier;

[0036] d, 57 parts of alkyl acrylate;

[0037] e, 21 parts of alkyl methacrylate;

[0038] f, 11 parts of aryl unsaturated monomers;

[0039] h, 8 parts of cross-linking monomers;

[0040] i, 5 parts of coupling agent;

[0041] j, 6 parts of nano titanium dioxide;

[0042] First add the aluminum-zirconium coupling agent and nano-titanium dioxide to 50 parts of deionized water, and stir and react at 55°C for 30 minutes to form a nano-titanium dioxide dispersion;

[0043] Component potassium persulfate and 20 parts of deionized water form initiator aqueous solution, stand-by;

[0044] Put the remaining deionized water and nano-titanium dioxide dispersion in the reaction kettle, add 1.5 parts of AEO-9, 2.1 parts of sodium lauryl sulfate, 0.8 parts of PEG-400, 0.8 parts of Span...

Embodiment 2

[0048] A nano-titanium dioxide modified polyacrylate finishing agent, comprising:

[0049] a, 390 parts of deionized water;

[0050] b, 0.9 parts of initiator;

[0051] c, 6 parts of emulsifier;

[0052] d, 63 parts of alkyl acrylate;

[0053] e, 24 parts of alkyl methacrylate;

[0054] f, 13 parts of aryl unsaturated monomers;

[0055] h, 10 parts of crosslinking monomer;

[0056] i, 6 parts of coupling agent;

[0057] j, 6 parts of nano titanium dioxide;

[0058] First add the aluminum-zirconium coupling agent and nano-titanium dioxide to 50 parts of deionized water, and stir and react at 55°C for 30 minutes to form a nano-titanium dioxide dispersion;

[0059] Component potassium persulfate and 20 parts of deionized water form initiator aqueous solution, stand-by;

[0060] Put the remaining deionized water and nano-titanium dioxide dispersion in the reaction kettle, add 1.8 parts of AEO-9, 2.4 parts of sodium lauryl sulfate, 0.8 parts of PEG-400, 1 part of Span-60, and...

Embodiment 3

[0064] A nano-titanium dioxide modified polyacrylate finishing agent, comprising:

[0065] a, 430 parts of deionized water;

[0066] b, 1.4 parts of initiator;

[0067] c, 7.1 parts of emulsifier;

[0068] d, 71 parts of alkyl acrylate;

[0069] e, 28 parts of alkyl methacrylate;

[0070] f, 15 parts of aryl unsaturated monomers;

[0071] h, 11 parts of cross-linking monomers;

[0072] i, 6 parts of coupling agent;

[0073] j, 7 parts of nano titanium dioxide;

[0074] First add the aluminum-zirconium coupling agent and nano-titanium dioxide to 50 parts of deionized water, and stir and react at 55°C for 30 minutes to form a nano-titanium dioxide dispersion;

[0075] Component ammonium persulfate and 20 parts of deionized water form an aqueous initiator solution, which is ready for use;

[0076] Put the remaining deionized water and nano-titanium dioxide dispersion in the reaction kettle, add 2.1 parts of AEO-9, 2 parts of sodium lauryl sulfate, 1.4 parts of PEG-400, 1....

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PUM

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Abstract

The invention relates to a nano TiO2 modified polyacrylate coating agent which is prepared by performing emulsification polymerization components such as deionized water, an emulsifier, alkyl acrylate, methacrylate and alkyl methacrylate ester, an aryl unsaturated monomer, a cross-linking monomer, a coupling agent, nano titanium dioxide and the like under the action of an initiator. Due to modification of the nano titanium dioxide, the mechanical property of a coated film of the polyacrylate coating agent is improved, the color change and the aging phenomenon of the coated film are alleviated, and a self-cleaning function is achieved.

Description

technical field [0001] The invention relates to a nano-titanium dioxide modified polyacrylate finishing agent, belonging to the field of leather chemicals. Background technique [0002] The purpose of leather finishing is to make the color of the leather uniform, improve and modify the defects on the leather surface, make the surface of the finished leather bright and beautiful, and enhance the durability of the leather. Polyacrylate emulsion and its coating film have better weather resistance, transparency, natural drying performance, and good gloss (not easy to turn yellow); especially have excellent adhesion, and occupy an important position in leather finishing agents, but their own The inherent disadvantages: poor water resistance, poor moisture permeability, low hardness of the coating film, "cold and brittle hot sticky", poor flexibility, etc., which greatly limit its application. [0003] Nano-titanium dioxide not only has small size effect, surface interface effect...

Claims

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Application Information

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IPC IPC(8): C09D133/08C09D7/12C14C11/00C08F220/18C08F220/14C08F212/08C08F2/44C08F2/26C08F2/30
Inventor 王禹
Owner NANYANG NORMAL UNIV
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