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Hard clear, easy-to-clean hydrophobic coating for wood, metal and plastic surfaces

A hydrophobic coating, high hardness technology, used in alkali metal silicate coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problem of wear resistance, alkali resistance, high temperature resistance, high humidity resistance, and difficult to clean metal surfaces. Oil contamination, reduced easy-to-clean coating performance, etc., to achieve good hydrophobicity, improved curing effect, and excellent water resistance.

Active Publication Date: 2019-11-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After oil stains adhere to the surface of wood, metal and plastic for a long time, it is difficult to clean the oil stains on the metal surface even with a special oil stain cleaning agent
[0003] Existing easy-to-clean water glass hydrophilic coatings on wood, metal and plastic surfaces have wear resistance, acid resistance, alkali resistance, high temperature resistance, and high humidity resistance. However, after a period of use, the easy-to-clean performance decreases rapidly, and the appearance of the coating is also damaged, showing whitening, fading or even falling off.
This is because the coating is in the working environment for a long time, affected by the medium, the Si-O-Si bond in the silicate coating on the coating surface is destroyed, and the metal ions in the coating such as K + , Li + Loss, the hydroxyl radicals on the surface of the coating are greatly reduced, the hydrophilic performance of the coating is reduced, the appearance of the coating is damaged, and the easy-to-clean performance of the coating is greatly reduced

Method used

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  • Hard clear, easy-to-clean hydrophobic coating for wood, metal and plastic surfaces
  • Hard clear, easy-to-clean hydrophobic coating for wood, metal and plastic surfaces
  • Hard clear, easy-to-clean hydrophobic coating for wood, metal and plastic surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] formula:

[0040] Table 1 Embodiment 1 formula

[0041]

[0042] In high-hardness transparent and easy-to-clean hydrophobic coatings used on wood, metal and plastic surfaces, potassium silicate and lithium silicate exist in the form of aqueous solutions respectively, wherein the mass percentage concentration of lithium silicate aqueous solution is 25%, and the mass percentage concentration of potassium silicate aqueous solution is 50%.

[0043] Preparation process: Dilute the silane coupling agent (KH560) with water, add polydimethylsiloxane (PDMS, CAS number: 9006‐65‐9; molecular formula: C 6 h 18 OSi 2 ), isobutanol and N,N-dimethylformamide, stirred for 2h and left to stand for later use.

[0044] Mix lithium silicate aqueous solution, potassium silicate aqueous solution and metered water in sequence, add the diluted wetting agent (TEGO245 and BYK346 mixed in equal amounts) and disodium EDTA, add the silane coupling agent (KH560) prepared above, Mixed solutio...

Embodiment 2

[0062] formula:

[0063] Table 6 Embodiment 2 formula

[0064]

[0065] Preparation process: Dilute the silane coupling agent (KH560) with water, add polydimethylsiloxane (PDMS, CAS number: 9006‐65‐9; molecular formula: C6H18OSi2) and dipropylene glycol methyl ether, stir for 2 hours and then set aside .

[0066] Mix lithium silicate aqueous solution, potassium silicate aqueous solution and metered water in sequence, add the diluted wetting agent (TEGO245 and BYK346 mixed in equal amounts) and disodium EDTA, add the silane coupling agent (KH560) prepared above, The mixed solution of polydimethylsiloxane (PDMS) and dipropylene glycol methyl ether was stirred at 50° C. for 1 hour, filtered and packaged for later use.

[0067] Coating properties: the appearance is slightly white, clear, the viscosity is about 10mPa.s, and the solid content is 29%;

[0068] Construction and drying: Mix the paint with sodium fluorosilicate aqueous solution and potassium tetraborate aqueous so...

Embodiment 3

[0073] formula:

[0074] Table 8 Example 3 formulation

[0075]

[0076]

[0077] Preparation process: Dilute the silane coupling agent (KH560) with water, add polydimethylsiloxane (PDMS, CAS number: 9006‐65‐9; molecular formula: C6H18OSi2) and propylene glycol butyl ether, stir for 2 hours and then set aside for later use.

[0078] Mix lithium silicate aqueous solution, potassium silicate aqueous solution and metered water in sequence, add the diluted wetting agent (TEGO245 and BYK346 mixed in equal amounts) and disodium EDTA, add the silane coupling agent (KH560) prepared above, The mixed solution of polydimethylsiloxane (PDMS) and propylene glycol butyl ether was stirred at 25°C for 4 hours, filtered and packaged for later use.

[0079] Coating performance: the appearance is clear and transparent, the viscosity is about 10mPa.s, and the solid content is 30%;

[0080] Construction and drying: Mix the paint with sodium fluorosilicate aqueous solution and potassium tet...

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Abstract

The invention discloses a high-hardness, transparent, easily cleaned and hydrophobic coating for wood, metal and plastic surfaces. The high-hardness, transparent, easily cleaned and hydrophobic coating for the wood, metal and plastic surfaces comprises the following raw material components calculated in percentage by mass: 5 to 15% of potassium silicate, 10 to 30% of lithium silicate, 0.5 to 5% ofa silane coupling agent, 1 to 5% of fluorosilicate, 1 to 5% of borate, 0.1 to 2% of a wetting agent, 0.5 to 2% of a buffering agent, 1 to 5% of a coalescing agent and the balance of water. The preparation process of the high-hardness, transparent, easily cleaned and hydrophobic coating for the wood, metal and plastic surfaces comprises the following steps: uniformly mixing the components at roomtemperature, stirring for 1 to 3 h at the temperature between 25 to 60 DEG C, filtering and packing. The high-hardness, transparent, easily cleaned and hydrophobic coating for the wood, metal and plastic surfaces disclosed by the invention has excellent protection ability to a substrate, and makes the surface of the substrate hydrophobic, thereby being capable of improving the wear resistance, high-temperature resistance and easy cleaning ability of the substrate.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-hardness transparent and easy-to-clean hydrophobic coating for wood, metal and plastic surfaces. Background technique [0002] With the improvement of people's living standards, more and more special functional requirements are put forward for metals, such as easy-to-clean functions. In daily life, metal surfaces in industrial production and home environments are prone to various oil stains, and some wood, metal and plastic work in high oil pollution environments, such as range hoods, microwave ovens or ovens, and furniture in home environments. After oil stains adhere to the surface of wood, metal and plastic for a long time, it is difficult to clean the oil stains on the metal surface even with a special oil stain cleaning agent. [0003] Existing easy-to-clean water glass hydrophilic coatings on wood, metal and plastic surfaces have wear resistance, acid resistance, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/04C09D7/65C09D7/63C09D7/61
CPCC09D1/04C09D5/08C09D5/18
Inventor 瞿金清王磊刘栋
Owner SOUTH CHINA UNIV OF TECH
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