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Preparation and application of a polyacrylate dispersant and superhydrophobic coating

A polyacrylate and acrylate technology, applied in coatings and other directions, can solve the problems of difficulty in obtaining transparency and durability of super-hydrophobic coatings, less dispersants in super-hydrophobic nano-composite coatings, etc., and achieve good super-hydrophobicity. Cleaning performance, uniform morphology, and strong general-purpose substrates

Active Publication Date: 2022-02-22
NORTHWEST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, polymer dispersant technology is mainly controlled by several internationally renowned companies such as ICI, Dupont, BYK, and EFKA. There are many types of dispersants in the market, but there are few dispersants used in the preparation of superhydrophobic nanocomposite coatings, so it is difficult to obtain Transparency and durability of superhydrophobic coating

Method used

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  • Preparation and application of a polyacrylate dispersant and superhydrophobic coating
  • Preparation and application of a polyacrylate dispersant and superhydrophobic coating
  • Preparation and application of a polyacrylate dispersant and superhydrophobic coating

Examples

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preparation example Construction

[0054] The preparation method of transparent superhydrophobic coating of the present invention comprises the following steps:

[0055] Step S1, preparing polyacrylate dispersant, including two preparation methods:

[0056] The first method: free radical polymerization of four (amino) acrylate monomers:

[0057] A1: According to the molar percentage (25~30): (10~15): (45~55): (5~15) the (meth)acrylate monomer containing amino structure and the other three (meth) ) acrylate monomers (methyl methacrylate, butyl acrylate and isobutyl methacrylate) dissolved in solvents (methanol, ethanol, xylene, propylene glycol methyl ether acetate, tetrahydrofuran, N,N-dimethylformaldehyde Amide or one or more of them mixed with butyl acetate), the mass percentage of methacrylate monomer containing amino structure and the remaining three (meth)acrylate monomers and solvent (same as above) For (8~20): (80~92), obtain the monomer mixture;

[0058] B1: According to the initiator (azobisisobutyr...

Embodiment 1

[0082] A polyacrylate dispersant (1) was prepared by free radical polymerization of four (amino) acrylate monomers:

[0083] a. Preparation of (meth)acrylate monomer containing amino structure:

[0084]Dissolve HEMA monomer and IEA monomer in solvent methanol and ethanol mixture respectively to obtain 10% mass percentage concentration of IEA solution and HEMA solution monomer solution; The precursor solution is added dropwise to the HEMA monomer solution, and the precursor solution is obtained after continuous reaction and purification; the obtained precursor solution and the amine monomer 2-ethylhexylamine (EAm) are dissolved in the solvent methanol and ethanol mixture respectively , to obtain a precursor monomer solution and an amine monomer solution with a mass percent concentration of 8% respectively; under nitrogen, add the amine monomer solution dropwise to the precursor monomer solution at a molar percentage of 40:60, and continue After reaction and purification, the m...

Embodiment 2

[0090] The polyacrylate dispersant (2) was prepared by free-radical polymerization of four (amino) acrylate monomers:

[0091] a. Preparation of (meth)acrylate monomer containing amino structure:

[0092] Dissolve the HEMA monomer and the IEA monomer in the solvent xylene respectively to obtain a mass percent concentration of 8% IEA solution and a HEMA solution monomer solution; Add dropwise in the HEMA monomer solution, continue the reaction, and obtain the precursor solution after purification; the obtained precursor solution and the amine monomer oleylamine (OAm) are respectively dissolved in the solvent xylene, and the mass percent concentration is 20% respectively. Precursor monomer solution and amine monomer solution; under nitrogen conditions, add the amine monomer solution dropwise to the precursor monomer solution according to the molar percentage of 30:70, continue the reaction, and obtain the amine-containing structure after purification Methacrylate monomer (2). ...

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Abstract

The invention discloses the preparation and application of a polyacrylate dispersant and a superhydrophobic coating. The polyacrylate polymer dispersant whose side groups contain hydrocarbon groups and polyamine functional groups is dissolved in a solvent. Add hydrophobic particles and film-forming substances to it in turn to prepare a super-hydrophobic composite dispersion, and then apply it on the surface of different substrates by spraying, scraping, etc., and dry to obtain a transparent super-hydrophobic nano-composite coating. The superhydrophobic coating obtained from the superhydrophobic composite coating material obtained by the superhydrophobic coating has uniform appearance, good transparency, a good water contact angle on the coating surface, and a rolling angle of the coating surface is not more than 6°; the coating has good superhydrophobic properties The self-cleaning performance and the chemical medium resistance of the coating are significantly improved; and the base material is highly versatile, suitable for large-area construction, and can realize mass production.

Description

technical field [0001] The invention relates to the technical fields of polymer chemistry and physics, surface science and industrial coatings, in particular to the synthesis of a polyacrylate dispersant and its application in superhydrophobic coatings. Background technique [0002] Superhydrophobic surfaces are widely used in various fields such as aerospace and navigation, military and civilian manufacturing, and biomedicine because of their unique self-cleaning, water-repelling, and anti-fouling functions. At present, common methods for preparing superhydrophobic nanocomposite coatings include etching, chemical vapor deposition, sol-gel, spraying, etc. Preparation, the resulting coating has poor light transmittance and durability, which makes it difficult to realize industrialization of superhydrophobic coatings. [0003] The spraying method "binder + hydrophobic nanoparticles" method integrates the advantages of spraying process and binder, which can not only enhance th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/36C09D7/65C09D7/62
CPCC08F220/1804C09D7/65C09D7/62
Inventor 史素青范蓉瑾陈杰赵凌峰杜晨辉
Owner NORTHWEST UNIV
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