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Organosilicon superhydrophobic nano-composite coating, and preparation method and use thereof

A nano-composite coating, composite coating technology, applied in coatings, chemical instruments and methods, synthetic resin layered products, etc. The performance does not meet the requirements and other problems, so as to achieve the effect of low production cost, avoiding performance degradation and simple formula.

Active Publication Date: 2013-03-13
STATE GRID CHONGQING ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) The addition of a high content of inorganic fillers will lead to the reduction of the excellent properties of the polymer itself, such as the hydrophobicity not meeting the requirements, so the inorganic fillers used generally require pre-hydrophobic modification
In addition, it will also reduce the bonding ability of the polymer and the base material, the weather resistance of the polymer such as silicone resin itself, etc.
[0008] (3) A high content of inorganic fillers will lead to excessive viscosity of the system, which is not conducive to the construction of coatings such as spraying, rolling, dipping, brushing, etc.
However, there are currently very few reports on the use of ultra-low content of inorganic fillers (less than 3% by weight) and silicone resins to achieve superhydrophobicity.

Method used

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  • Organosilicon superhydrophobic nano-composite coating, and preparation method and use thereof
  • Organosilicon superhydrophobic nano-composite coating, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] First 9.6 parts by weight of silanol-terminated methyl silicone resin (sold by Chengdu Tuoli Chemical Industry Co., Ltd.) , the trade name is GC-500Z) (the weight-average molecular weight of the resin is 45,000) dissolved in 45 parts by weight of petroleum ether, after mechanically stirring for 30 minutes, spray it on the stainless steel plate base for 5s (that is, 5 seconds) under the pressure of 0.6MPa to form The inner coating (coating thickness 0.25mm) that does not contain inorganic powder, and then 0.2 parts by weight of silicon dioxide (average particle diameter 15nm, Wacker Company or Digaosha Company) modified by dimethyl dichlorosilane , trade name N20 or A200) and 0.2 parts by weight of GC-500Z dissolved in 45 parts by weight of petroleum ether and mechanically stirred for 30 minutes, then sprayed for 5 seconds under a pressure of 0.6 MPa on the silanol-terminated methyl silicone resin coating to form an outer coating layer (coating thickness 120nm), a compos...

Embodiment 2

[0049] First, 18.5 parts by weight of the silanol-terminated phenyl silicone resin (the weight average molecular weight of the resin is 60,000, produced by Chengdu Tuoli Co., Ltd.) Chemical Industry Co., Ltd.) dissolved in 40 parts by weight of tetrahydrofuran, mechanically stirred for 60 minutes, and then sprayed for 5 seconds (that is, 5 seconds) under a pressure of 0.6 MPa to form an inner coating (coating) that does not contain inorganic powder on the stainless steel plate substrate. thickness 0.4mm), and then 0.5 parts by weight of titanium dioxide modified by trichlorosilane (U.S. DuPont Company, trade name R105, average particle size 30nm) and 1 part by weight of phenyl silicone resin terminated by silanol (the weight of the resin Average molecular weight 60,000, sold by Chengdu Tuoli Chemical Industry Co., Ltd.) was dissolved in 40 parts by weight of tetrahydrofuran (THF) by mechanical stirring for 60 min, and sprayed for 5 s under a pressure of 0.6 MPa to form an outer...

Embodiment 3

[0052] First, 38.5 parts by weight of the methyl phenyl silicone resin (the weight average molecular weight of the resin is 180,000, provided by Chengdu Tuoxi) that comprises the cross-linking agent vinyl tributyl ketoxime base silane (content in the resin is 6wt%) end-capped methyl phenyl silicone resin Li Chemical Industry Co., Ltd.) was dissolved in 30 parts by weight of N,N-dimethylacetamide, and after ultrasonic dispersion for 100min, dip-coated one layer on the glass plate substrate to form an inner coating (coating) without inorganic powder layer thickness 0.8 mm). Then 1 weight part of calcium carbonate modified by KH550 (average particle diameter 100nm, product name: heavy calcium carbonate, manufacturer: Sichuan Hengtong calcium carbonate powder factory) and 0.5 weight part of the above-mentioned silanol-terminated methylphenyl silicon Resin is dissolved in 30 parts by weight of N,N-dimethylacetamide, and after ultrasonic dispersion for 100min, dip-coat one layer on ...

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Abstract

The invention discloses an organosilicon superhydrophobic nano-composite coating with ultra-low inorganic powder content. The composite coating sequentially comprises a base material, an organosilicone resin coating which contains inorganic powder and serves as an inner coating, and an organosilicone resin coating which does not contain the inorganic powder and serves as an outer coating, or the composite coating sequentially comprises the base material, an organosilicone resin coating which does not contain the inorganic powder and serves as the inner coating and an organosilicone resin coating which contains the inorganic powder and serves as the outer coating. A method for forming the coating on the base material by a two-step coating method is also provided by the invention. The composite coating provided by the invention can be used for long-term hydrophobisation, ice prevention and weather resistance in the fields of inner and outer walls of outdoor buildings, automobile bodies, ship bodies, various pipelines, electric and electronic devices, toys, plastic products, glass products and the like. The preparation method provided by the invention has the advantages of simple process, short flow, strong generality, strong environmental suitability and the like, and is easy to construct.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic coatings and their preparation, and in particular relates to an organosilicon superhydrophobic nanocomposite coating with ultra-low inorganic powder content, a preparation method and application thereof. Background technique [0002] Superhydrophobic materials are widely used in interior and exterior walls of buildings, automobile bodies, ship hulls, various pipes, electrical and electronic devices, toys, plastic products, glass products, etc. And other fields have practical application value, making it a hot spot in scientific research and industrial application in recent years. [0003] The preparation of superhydrophobic materials usually needs to meet two key conditions: one is that the surface of the material has sufficient roughness, especially a dual-scale structure of micro-nano, and the other is that the surface material is a hydrophobic material with a sufficiently low surface e...

Claims

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Application Information

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IPC IPC(8): B32B27/06B32B27/20C09D183/04C09D183/06C09D183/05C09D7/12
Inventor 况军傅强陶云峰徐坤耀陈枫方辉
Owner STATE GRID CHONGQING ELECTRIC POWER
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