Polyhydroxy polysiloxane and wear-resisting super-hydrophobic coating and preparation method

A technology of polyhydroxypolysiloxane and superhydrophobic coating, which is applied in coatings, polyurea/polyurethane coatings, anti-corrosion coatings, etc., can solve problems such as low surface energy, and achieve low surface tension, small size, and good durability. grinding effect

Active Publication Date: 2016-06-08
国科广化(南雄)新材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Professor Guojun Liu used the methyl group in polydimethylsiloxane to provide a low surface energy layer and grafted it to the surface of the polymer to obtain a super-hydrophobic surface, and the polyurethane formed with the help of isocyanate has Strong bonding effect, but needs further optimization

Method used

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  • Polyhydroxy polysiloxane and wear-resisting super-hydrophobic coating and preparation method
  • Polyhydroxy polysiloxane and wear-resisting super-hydrophobic coating and preparation method
  • Polyhydroxy polysiloxane and wear-resisting super-hydrophobic coating and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 250-300 parts of anhydrous diethyl ether and magnets into a 500 mL round bottom flask, stir, then add 100.0 parts of allyl alcohol (AAL) and 244.0 parts of triethylamine, and seal it. Stir rapidly in an ice-water bath and slowly add 224.5 parts of trimethylchlorosilane (TMS-Cl) dropwise thereto, then let it rise to room temperature naturally, and react overnight. After the reaction, the Et was removed by suction filtration 3 N-HCl, the obtained organic phase was repeatedly washed 5 times with 20 mL of water, and then dried over anhydrous magnesium sulfate overnight. After drying, the filtrate was filtered to remove the solvent by rotary evaporation, and distilled to obtain 220 parts of pure monomer AAL-TMS with a yield of 98.2%.

[0057] Add 100 to 200 parts of anhydrous toluene and magnetons in a 250ml double-necked round bottom flask, and then add 50.0 parts of polymethylhydrogensiloxane (1% hydrogen content) (Shandong Dayi Chemical Co., Ltd., DY -H202) and 94 p...

Embodiment 2

[0061] Add 100 to 200 parts of anhydrous toluene and magneton into a 250 mL double-necked round bottom flask, and then add 50.0 parts of polymethylhydrosiloxane (0.5% hydrogen content) (Shandong Dayi Chemical Co., Ltd., DY -H202) and 47 parts of AAL-TMS prepared by Example 1, reflux and stir in an oil bath at 90°C, and slowly add 7.8ppm of karstedt catalyst dissolved in 87 parts of xylene dropwise to it in the process of stirring (platinum-tetramethyltetravinylsiloxane complex), after reacting for 24 hours, the solvent was evaporated by rotary evaporation, and then the reaction liquid was precipitated in methanol by precipitation method, and then the precipitate was washed with methanol to obtain purified polymer to obtain 90 g of PHMS-g-AAL-TMS light yellow transparent liquid with a yield of 92.8%.

[0062] In a 500mL round-bottomed flask, add 250-350 parts of tetrahydrofuran and magnetons, then add 50 parts of PHMS-g-AAL-TMS, and then drop 2-3 drops of 2mol / L hydrochloric ac...

Embodiment 3

[0065] Add 100 to 200 parts of anhydrous toluene and magneton into a 250 mL double-necked round bottom flask, and then add 50.0 parts of polymethylhydrogensiloxane (hydrogen content 0.18%) (Shandong Dayi Chemical Co., Ltd., DY -H202) and 17 parts of AAL-TMS prepared by the examples, reflux and stir in an oil bath at 90°C, and slowly add 2.81ppm of karstedt catalyst (platinum -tetramethyltetravinylsiloxane complex), after reacting for 24h, the solvent was evaporated by rotary evaporation, and then by precipitation, the reaction solution was sunk in methanol, and then the precipitate was washed with methanol to obtain a purified polymer , to obtain 60 g of PHMS-g-AAL-TMS light yellow transparent liquid with a yield of 89.6%.

[0066] In a 500mL round-bottomed flask, add 250-350 parts of tetrahydrofuran and magnetons, then add 50 parts of PHMS-g-AAL-TMS, and then drop 2-3 drops of 2mol / L hydrochloric acid solution to dissolve the mixed solution Stir at room temperature for 5h, a...

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Abstract

The invention discloses a polyhydroxy polysiloxane and wear-resisting super-hydrophobic coating and a preparation method, and belongs to the field of super-amphiphobic materials. A structural formula of polyhydroxy polysiloxane is shown in the following formula of the description. According to the method, an active hydroxyl group is introduced onto a flexible silica main chain through over protection and deprotection processes, polymethylsiloxane with active hydroxyl group on a side chain is compounded, then the polymethylsiloxane with an active hydroxyl group on a side chain is cross-linked with diisocyanate to form a three dimensional net structure, methyl is orderly and densely arranged on the surface of a substrate, the methyl is very small in polarity and volume, and low in surface tension, thus, a compact low surface energy layer is formed, and a wear-resisting super-hydrophobic material is formed by utilizing cohesive action of isocyanate.

Description

technical field [0001] The invention belongs to the field of superamphiphobic materials, in particular to a polyhydroxy polysiloxane, a wear-resistant superhydrophobic coating and a preparation method. Background technique [0002] The lotus leaf effect is a strange effect that plants have evolved to adapt to nature in the process of evolution. The most important parameter to characterize the surface wetting behavior is the contact angle. According to the range of the contact angle, the surface can be divided into superhydrophilic surface, superhydrophobic surface, superoleophilic surface and superoleophobic surface. Among them, if the static contact angle of the surface to water is less than 10°, it is called a superhydrophilic surface, and if the surface has a contact angle greater than 150°, it is called a superhydrophobic surface. A surface can be considered a superoleophobic surface if it has a contact angle of greater than 150° for oil. If the surface has both superh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/385C09D175/04C09D5/08D06M15/564C08G18/64
CPCC08G18/6469C08G77/385C09D5/08C09D175/04D06M15/564D06M2200/12
Inventor 胡继文杨公华袁珊涂园园林树东
Owner 国科广化(南雄)新材料研究院有限公司
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