Polymer coating liquid for self-cleaning glass and preparation method of polymer coating liquid

A polymer, self-cleaning technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of difficulty in maintaining the mechanical stability of superhydrophobic coatings, loss of the original value of glass, damage to surface texture, etc. Uniform, strong adhesion, not easy to agglomerate

Pending Publication Date: 2022-07-15
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical stability of the super-hydrophobic coating is difficult to maintain stability. Due to long-term exposure to the polluted environment, the surface of the super-hydrophobic coating is subjected to external impact and friction for a long time, the surface texture is damaged, and the water repellency gradually decreases.
However, if the mechanical pro

Method used

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  • Polymer coating liquid for self-cleaning glass and preparation method of polymer coating liquid
  • Polymer coating liquid for self-cleaning glass and preparation method of polymer coating liquid
  • Polymer coating liquid for self-cleaning glass and preparation method of polymer coating liquid

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] The preparation of the silicone polyurethane resin is a conventional polyurethane preparation process, for example, it can be carried out according to the following process: adding a polyol to the reaction kettle and diluting it with DMF, adding half of the isocyanate, heating the temperature to 80 ° C and stirring for 1 hour, and then continuing to add DMF to the appropriate viscosity, adding silicone diol and stirring for half an hour, then adding the remaining isocyanate, reacting at 80 ° C until the system is viscous, and finally capping with methanol, adding DMF to adjust the solid content to 30%.

[0033] Wherein, the organosilicon diol is prepared by alcohol protection of diethanolamine, followed by chlorine substitution reaction with γ-chloropropyltrimethoxysilane

[0034] At present, the silica sol is usually sprayed directly on the surface of the glass substrate to form a coating, but the durability of the coating is poor. The polymer emulsion can effectively...

Example Embodiment

[0035] Example 1:

[0036] 1 part of high stability silica sol, 5 parts of silicone polyurethane resin and 3 parts of ethanol were mixed together under high speed stirring, then 0.1 part of gamma-glycidyl ether oxyoctyltrimethoxysilane and 2 parts of adjuvant were added Stir well.

Example Embodiment

[0037] Example 2:

[0038] 2 parts of high stability silica sol, 7 parts of silicone polyurethane resin and 3 parts of ethanol were mixed together under high speed stirring, then 0.3 parts of gamma-glycidyl ether oxyoctyltrimethoxysilane and 2 parts of adjuvants were added Stir well.

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Abstract

The invention relates to polymer coating liquid for self-cleaning glass. The polymer coating liquid is prepared from high-stability silicon dioxide sol, organic silicon polyurethane resin, a long-chain alkyl silane coupling agent, a solvent and an auxiliary, wherein the high-stability silicon dioxide sol is prepared by taking tetraethoxysilane as a precursor, a modifier with a hydrophilic main chain and hydrophobic side chains as a core, absolute ethyl alcohol as a cosolvent and ammonia water as a catalyst, preparing core-shell silicon dioxide sol by a sol-gel method, then adding KH550 and stirring. The polymer coating liquid provided by the invention is a coating formed by compounding polyurethane resin and silicon dioxide sol, and the silicon dioxide sol is a core-shell sol particle prepared by taking a fluorine-containing modifier as a core, is uniform in size, is not easy to agglomerate in the coating, and is good in compatibility and high in storage stability; a film is easy to form, a formed coating is high in adhesive force, a super-hydrophobic coating is formed on the surface of a substrate, and the self-cleaning performance is achieved; the silicon dioxide sol particles can improve the high temperature resistance and wear resistance of the coating, and the durability of the coating is good.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polymer coating solution for self-cleaning glass and a preparation method thereof. Background technique [0002] Glass is an amorphous inorganic non-metallic material whose main component is silicon dioxide. It is widely used in buildings and plays the role of blocking wind and light. However, with the rapid development of the industry, the deterioration of the environment has become more and more serious, the degree of air pollution has increased, and the dust in the air has increased, making the facade of the building dusty, especially the transparent glass, which is followed by cleaning and care. The problem became more and more prominent. On the other hand, people have higher and higher requirements for the quality of life. Therefore, people urgently need a new type of glass that uses natural conditions to achieve self-cleaning effects. Self-cleaning glass comes...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/62C09D7/63C03C17/32C08G18/32C08G18/66C08G18/48C08G18/42
CPCC09D175/04C09D7/62C09D7/63C03C17/322C08G18/3893C08G18/4854C08G18/4238C08G18/4018C08G18/66C08G2150/00C08K9/10C08K3/36C08K5/5435
Inventor 徐嘉琪黄德奇王元有王群孛
Owner YANGZHOU POLYTECHNIC INST
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