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High temperature resistant hydrophobic coating based on epoxy resin modified silica sol and preparation method thereof

A technology of epoxy resin and hydrophobic coating, applied in the direction of epoxy resin coating, coating, etc., can solve the problems of weak bond instability, easy decomposition of organic phase, phase separation, etc., and achieve improvement of construction process and change of curing shrinkage rate Small, the effect of improving heat resistance

Inactive Publication Date: 2016-03-02
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is the easiest way to prepare organic-inorganic hybrid materials. It is prone to macroscopic phase separation, and it is difficult to prepare uniform and stable organic-inorganic hybrid materials. Moreover, at high temperatures, these weak bonds are unstable and easy to break, and the organic phase is easy to Decomposition, the heat resistance and stability of the coating will be affected

Method used

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  • High temperature resistant hydrophobic coating based on epoxy resin modified silica sol and preparation method thereof
  • High temperature resistant hydrophobic coating based on epoxy resin modified silica sol and preparation method thereof
  • High temperature resistant hydrophobic coating based on epoxy resin modified silica sol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. The formula and preparation method of epoxy resin modified silica sol:

[0030] 1. Formula:

[0031]

[0032] 2. Preparation method: Stir and soften all the epoxy resin at 110°C for 30 minutes, then add the weighed butyl acetate into the reaction vessel and stir for 30 minutes until it is dispersed and dissolved, then quantitatively add γ-aminopropyl tris Ethoxysilane was added into the reaction vessel, the reaction system was stirred and reacted at 60°C for 3 hours, the temperature was set at 80°C, all the ethyl orthosilicate was mixed with ethanol and then added into the reaction vessel, distilled water was added dropwise, The addition time was 1 hour. After the dropwise addition was completed, the reaction was kept at 80° C. for 6 hours, and the mixture was discharged at room temperature.

[0033] 2. Formula and preparation of high temperature resistant hydrophobic coating based on epoxy resin modified silica sol:

[0034] 1. Formula

[0035]

[0036] ...

Embodiment 2

[0039] 1. The formula and preparation method of epoxy resin modified silica sol:

[0040] 1. Formula:

[0041]

[0042] 2. Preparation method: Stir and soften all the above-mentioned epoxy resins at 60°C for 10 minutes, then add the weighed butyl acetate into the reaction vessel and stir for 15 minutes until dispersed and dissolved, then quantitatively add γ-aminopropyl Add triethoxysilane into the reaction vessel, stir the reaction system at 45°C for 4 hours, set the temperature at 50°C, mix all the ethyl orthosilicate and ethanol into the reaction vessel, add distilled water dropwise, The dropwise addition time was 4 hours. After the dropwise addition was completed, the reaction was kept at 40°C for 5 hours, and the mixture was discharged at room temperature.

[0043] 2. Formula and preparation of high temperature resistant hydrophobic coating based on epoxy resin modified silica sol:

[0044] 1. Formula:

[0045]

[0046] 2. Preparation method: According to the abo...

Embodiment 3

[0048] 1. The formula and preparation method of epoxy resin modified silica sol:

[0049] 1. Formula:

[0050]

[0051] 2. Preparation method: Stir and soften all the epoxy resin at 90°C for 20 minutes, then add the weighed butyl acetate into the reaction vessel and stir for 25 minutes until it is dispersed and dissolved, then quantitatively add γ-aminopropyl tris Ethoxysilane was added to the reaction vessel, the reaction system was stirred and reacted at 50°C for 7 hours, the temperature was set at 70°C, all the ethyl orthosilicate was mixed with ethanol and added to the reaction vessel, distilled water was added dropwise, The addition time was 5 hours. After the dropwise addition was completed, the reaction was kept at 70°C for 8 hours, and the mixture was discharged at room temperature.

[0052]2. Formula and preparation of high temperature resistant hydrophobic coating based on epoxy resin modified silica sol:

[0053] 1. Formula:

[0054]

[0055] 2. Preparation...

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Abstract

The invention discloses an epoxy resin modified silica sol based high-temperature-resistant hydrophobic coating which is composed of the following components in percentage by mass: 60-65% of epoxy resin modified silica sol, 7-9% of rutile titanium dioxide, 8-12% of glass dust, 9-10% of sericite powder, 0.5-1% of organic bentonite and 9-14% of butyl acetate. The preparation method is implemented through the following steps of: preparing epoxy resin modified silica sol firstly, reacting gamma-triethoxypropylsilane with epoxy resin, and then adding tetraethoxysilane for carrying out hydrolytic condensation; adding filler and a solvent in the prepared product in proportion, and carrying out high-speed mixing and grinding on the obtained mixture until the fineness of the obtained product is below 50 mu m so as to obtain the coating disclosed by the invention. A film prepared by dying and solidifying the coating disclosed by the invention has the advantages of good mechanical properties, excellent hydrophobic properties, good high temperature resistance and weather resistance, and the like. The coating is applicable to the high-temperature-resistant protection and decoration of metal substrates such as aluminum plates, tinplate and steel plates.

Description

technical field [0001] The invention belongs to the technical field of special high-performance coatings, and relates to a high-temperature-resistant and hydrophobic coating, and more specifically relates to a high-temperature-resistant hydrophobic coating based on epoxy resin modified silica sol and a preparation method thereof. Background technique [0002] Organic resin has always been used as the main film-forming substance of coatings, which has many advantages such as good film-forming property, strong adhesion, flexibility, etc. Inorganic materials usually have the characteristics of high strength, stable performance, and long service life. Its high brittleness, difficulty in processing and forming a film, and high cost make it unsuitable as a film-forming substance for coatings. It is of great practical application value to effectively combine organic and inorganic materials, give full play to the advantages of both, and obtain hybrid materials with more comprehensiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12
Inventor 李为立邢新雨
Owner JIANGSU UNIV OF SCI & TECH
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