Ceramic precursor resin applicable to rainproof and self-cleaning coating of glass

A resin and glass surface technology, applied in the synthesis and application of functional polymers, can solve the problems of short service life and loss of effect of rainproof agents, and achieve the effect of wide applicability

Inactive Publication Date: 2012-03-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rainproof agent has a short service life, and it will

Method used

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  • Ceramic precursor resin applicable to rainproof and self-cleaning coating of glass
  • Ceramic precursor resin applicable to rainproof and self-cleaning coating of glass
  • Ceramic precursor resin applicable to rainproof and self-cleaning coating of glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In a 500mL glass bottle equipped with a reflux condenser (the upper end of the condenser is equipped with a continuous nitrogen protection device), a thermometer and an addition funnel, add 100mL of toluene, and add 21.1g (0.1mol) of trifluoropropylmethyl dichloride under stirring Silane and 7.5g (0.05mol) methyltrichlorosilane; then add 30g (0.3mol) triethylamine; add 1.8g (0.1mol) water dropwise under ice-bath conditions, react naturally for 3h to obtain a white cloudy solution.

[0038] 16 g (0.1 mol) of hexamethyldisilazane was added dropwise to the above solution, and heated to 60° C. for 16 hours to obtain a yellow turbid solution. After cooling to room temperature, filter online under the protection of nitrogen. The filtrate was evaporated to remove the solvent in vacuo to obtain a pale yellow viscose resin.

[0039] Due to its sensitivity to air and moisture, the resin should be stored in a nitrogen-protected container. The viscosity of the resin at room tempe...

Embodiment 2

[0041] As shown in Example 1, 100mL of toluene was added to a 500mL glass bottle, and 21.1g (0.1mol) of trifluoropropylmethyldichlorosilane, 6.5g (0.05mol) of dimethyldichlorosilane and 3g of (0.02mol) methyltrichlorosilane; then add 30g (0.3mol) triethylamine; add 1.8g (0.1mol) water dropwise under ice-bath conditions, react naturally for 3h to obtain a white turbid solution.

[0042] 17.6 g (0.11 mol) of hexamethyldisilazane was added dropwise to the above solution, and heated to 80° C. for 12 hours to obtain a yellow turbid solution. After cooling to room temperature, filter online under the protection of nitrogen. The filtrate was evaporated to remove the solvent in vacuo to obtain a pale yellow viscose resin. Gel permeation chromatography (GPC) test shows that the number average molecular weight of the resin is about 1300.

Embodiment 3

[0044] In a 500mL glass bottle equipped with a reflux condenser (the upper end of the condenser is equipped with a continuous nitrogen protection device), a thermometer and an addition funnel, add 100mL of toluene, and add 31.7g (0.15mol) of trifluoropropylmethyl dichloride under stirring Silane; add 20g (0.2mol) of triethylamine; add 1.08g (0.06mol) of water dropwise under ice-bath conditions, react naturally for 5h to obtain a white turbid solution.

[0045] 19.2 g (0.12 mol) of hexamethyldisilazane was added dropwise to the above solution, and heated to 60° C. for 24 hours to obtain a light yellow turbid solution. After cooling to room temperature, filter online under the protection of nitrogen. The filtrate was evaporated to remove the solvent in vacuo to obtain a pale yellow viscose resin. Gel permeation chromatography (GPC) test shows that the number average molecular weight of the resin is about 800.

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Abstract

The invention discloses a synthesis method of fluoride-containing polysilazane-polysiloxane resin and a method for preparing durable rainproof agent coating applied on the surface of glass. The method comprises the following steps of: carrying out partial hydrolysis on fluoride-containing chlorosilane monomer mixture to form polysiloxane prepolymer, and then carrying out amido exchange reaction with hexamethyldisilazide to prepare fluoride-containing polysilazane-polysiloxane polymer. The polysilazane and polysiloxane are combined together with the surface of glass to form a firmly-combined protecting film by chemical bonds. The fluoride-containing polysiloxane elastomer coating formed by hydrolysis in the air has the advantages of hydrophobicity performance, high/low temperature resistance and scribing resistance, and also has the functions of being rainproof, anti-fog and self-cleaning.

Description

technical field [0001] The invention relates to a method for synthesizing a class of fluorine-containing polysilazide-siloxane resins and a method for applying the fluorine-containing polysilazide-siloxane resin as a glass rainproof agent, belonging to the technical field of functional polymer synthesis and application. technical background [0002] It is very important to maintain a good view of the glass in many occasions, such as aircraft cockpit windshield glass, car window glass, front and rear view mirror glass and architectural glass. In case of rain or high humidity (such as condensation caused by temperature difference between inside and outside), the existing solutions are: wipe off the mist with a wiper or rag; wipe off the mist with a wiper with the aid of detergent; use short-term effective liquid Rainproof agent, etc. However, these methods have disadvantages such as inconvenience and limited protective effect. The development of long-acting rainproofing agen...

Claims

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Application Information

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IPC IPC(8): C08G77/54C09D183/08C03C17/30
Inventor 杨丽君王明存
Owner BEIHANG UNIV
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