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A kind of fluorosilicone resin, preparation method, self-healing coating

A fluorosilicone resin and coating technology, which is applied in the field of polymer materials, can solve the problems such as the decline of waterproof and anti-fouling performance and the inability to self-repair, and achieve the effect of increasing the smoothness

Active Publication Date: 2021-10-08
SHANGHAI PHICHEM MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After long-term use, the fluorosilicone resin provided by the prior art will gradually decline in waterproof and stain resistance, and cannot be self-repaired

Method used

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  • A kind of fluorosilicone resin, preparation method, self-healing coating
  • A kind of fluorosilicone resin, preparation method, self-healing coating
  • A kind of fluorosilicone resin, preparation method, self-healing coating

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preparation example Construction

[0054] In the second aspect, the embodiment of the present invention provides the preparation method of the above-mentioned fluorosilicone resin, the preparation method comprising:

[0055] Step 1. Prepare side hydrogen silicone oil:

[0056] Under the catalysis of the first preset temperature and the first catalyst, the hydrogen-containing silicone oil, octamethylcyclotetrasiloxane, and hexamethyldisiloxane with a hydrogen content greater than 1% are reacted to obtain side hydrogen-containing silicone oil.

[0057] Step 2, preparation of fluorine-containing acrylate:

[0058] Under the catalysis of the second preset temperature and the second catalyst, the monofunctional hydroxyl perfluoropolyether is reacted with the unsaturated isocyanate to obtain the fluorine-containing acrylate.

[0059] Step 3. Under the catalysis of the third preset temperature and the third catalyst, the hydrogen-containing silicone oil and the fluorine-containing acrylate are subjected to a hydrosi...

Embodiment 1

[0089] In the first reactor, add 12 parts by weight of hydrogen-containing silicone oil (hydrogen content 1.5%, viscosity 30cst), 4 parts by weight of hexamethyldisiloxane (MM), 90 parts by weight of octamethylcyclotetrasilane Oxane (D4) and a solid acid catalyst with a mass concentration of 2%, controlled the temperature at 53° C., and stirred for 9 hours to obtain a mixed solution. Pour the mixed solution into the liquid separation device and let it stand until completely separated, separate and remove the yellow acid solution at the bottom layer, pour the upper layer liquid back into the reactor, and neutralize it with 5 parts by weight of sodium bicarbonate powder. Then distill off low boiling point substances at 110°C and 1.3kPa, and filter to obtain a colorless and transparent hydrogen-containing silicone oil with a relative molecular weight of 6,000.

[0090] The molecular weight of 80 parts by weight is 2000 monofunctional hydroxyl perfluoropolyether (10 a chain segmen...

Embodiment 2

[0093] In the first reactor, add 12 parts by weight of hydrogen-containing silicone oil (hydrogen content 1.5%, viscosity 30cst), 4 parts by weight of hexamethyldisiloxane (MM), 90 parts by weight of octamethylcyclotetrasilane Oxane (D4) and a concentrated sulfuric acid catalyst with a mass concentration of 2%, controlled the temperature at 53° C., and stirred for 9 hours to obtain a mixed solution. Pour the mixed solution into the liquid separation device and let it stand until completely separated, separate and remove the yellow acid solution at the bottom layer, pour the upper layer liquid back into the reactor, and neutralize it with 5 parts by weight of sodium bicarbonate powder. Then distill off low boiling point substances at 110°C and 1.3kPa, and filter to obtain a colorless and transparent hydrogen-containing silicone oil with a relative molecular weight of 6,000.

[0094] The molecular weight of 60 parts by weight is the monofunctional hydroxyl perfluoropolyether (10...

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Abstract

The invention discloses a fluorosilicone resin, a preparation method and a self-repairing coating, belonging to the field of polymer materials. The chemical structural formula of the fluorosilicone resin is as follows: wherein, m is an integer between 1-4; n is an integer between 20-50; R 1 The chemical structural formula of R is as follows: R 2 The chemical structural formula of is as follows: wherein, a, b, c, and d are independently integers between 0-30, and the sum of a, b, c, and d is greater than or equal to 10. The fluorosilicone resin can not only form a waterproof and stain-resistant coating with a certain hardness and wear resistance, but also has a self-repairing function. When the hydrophobic and oleophobic effect of the coating becomes poor, it will recover after a certain period of time.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a fluorosilicone resin, a preparation method and a self-repairing coating. Background technique [0002] Fluorosilicone resins are usually used to prepare waterproof and stain-resistant coatings with a certain hardness and wear resistance, and are widely used in high-polish products, such as electronic products. Therefore, it is necessary to provide a fluorosilicone resin. [0003] In the prior art, the side groups of the molecular chains of fluorosilicone resins contain isobornyl groups and / or acetoacetoxyethyl groups, alkyl groups and / or ester groups containing fluorine atoms, and are bonded to the main chain of fluorosilicone resins. silica crosslinked network. [0004] The inventors have found that the prior art has at least the following technical problems: [0005] After long-term use of the fluorosilicone resin provided by the prior art, its waterproof and stain-resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/46C09D183/12C09D5/16
Inventor 孙培旸苟金龙唐洋王林靖刘陈红吴胜密雷玲
Owner SHANGHAI PHICHEM MATERIAL CO LTD