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Fluorine silicon resin, preparation method thereof and antifouling paint

A technology of fluorosilicone resin and anti-fouling coatings, which is applied in the direction of anti-fouling/underwater coatings, coatings, paints containing biocide, etc. It can solve the problems of mixing solvents for a long time, agglomeration and precipitation of inorganic particles, and storage period of coatings. Short and other problems, to achieve the effect of high strength and hardness, lower surface energy, and good storage stability

Inactive Publication Date: 2010-07-14
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned nano-coating, the method of simple physical blending is used to mix the nano-pigment particles and the nano-silica, and the phenomenon of agglomeration and precipitation of the inorganic particles is very easy to occur. have extremely strict requirements
Moreover, in order to obtain a uniform and stable coating solution, a very long stirring time and a large amount of mixed solvent are required, which will cause a large loss of equipment and cause relatively large pollution to the environment, and the production efficiency is low
In addition, because the inorganic particles are easy to agglomerate and precipitate, the storage period of the above-mentioned coatings is short.

Method used

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  • Fluorine silicon resin, preparation method thereof and antifouling paint
  • Fluorine silicon resin, preparation method thereof and antifouling paint
  • Fluorine silicon resin, preparation method thereof and antifouling paint

Examples

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preparation example Construction

[0034] The present invention also provides the preparation method of the above-mentioned fluorosilicone resin, which comprises contacting the fluoropolymer and silicate and / or alkoxysilane with water to carry out hydrolysis and condensation reaction, the molecular chain of the fluoropolymer The side group contains isobornyl group and / or acetoacetoxyethyl group, alkyl group and / or ester group containing fluorine atom, and siloxane group bonded to the main chain of fluorine-containing polymer.

[0035] The conditions of the hydrolysis condensation reaction include: the weight of the fluoropolymer: the total weight of silicate and alkoxysilane: the weight of water is 1: 0.1-0.4: 0.03-0.09; The temperature may be 10-60° C., and the time for the hydrolysis and condensation reaction may be 2-24 hours.

[0036] The hydrolysis condensation reaction can be carried out in a first solvent, and the first solvent can be a solvent commonly used in the art, for example: in methanol, ethanol,...

Embodiment 1

[0087] This example is used to illustrate the fluorosilicone resin of the present invention and its preparation method.

[0088] Mix 54g isobutyl methacrylate, 6g isobornyl methacrylate, 20g brand 567A perfluoroalkyl acrylate, 20g methacryloxypropyltriethoxysilane in methyl ethyl ketone and m-xylene Carry out solution polymerization in the solvent, solvent amount is methyl ethyl ketone 80g, m-xylene 160g respectively, initiator is azobisisobutyronitrile (AIBN), with the total amount of polymerizable monomer as a benchmark, the amount of AIBN is 2% by weight, The reaction temperature is 80°C, and the reaction time is 12 hours. Afterwards, the obtained mixed solution is spin-dried in a rotary evaporator to remove the solvent. It is confirmed by infrared spectroscopy that the residue is the isoborneol contained in the side group of the molecular chain described in the present invention. Fluoropolymers with groups, ester groups containing fluorine atoms, and siloxane groups bonded...

Embodiment 2

[0091] This example is used to illustrate the fluorosilicone resin of the present invention and its preparation method.

[0092] 50g methyl methacrylate, 10g isobornyl methacrylate, 20g brand 567A perfluoroalkyl acrylate, 20g methacryloxypropyltrimethoxysilane were carried out in a mixed solvent of methyl ethyl ketone and toluene Solution polymerization, the amount of solvent is respectively 100g of methyl ethyl ketone, 200g of toluene, the initiator is AIBN, based on the total amount of polymerizable monomers, the amount of AIBN is 2% by weight, the reaction temperature is 80°C, and the reaction time is 12h. The resulting mixed solution is spin-dried in a rotary evaporator to remove the solvent, and the residue is confirmed by infrared spectroscopic analysis that the side group of the molecular chain of the present invention contains isobornyl, fluorine-containing ester groups, and fluorine-containing Fluoropolymers with siloxane groups bonded to the polymer backbone. The nu...

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Abstract

The invention provides a fluorine silicon resin, a preparation method of the fluorine silicon resin and an antifouling paint containing the fluorine silicon resin. The pendant group of the molecular chain of the fluorine silicon resin contains isobornyl and / or acetyl acetoxyl group ethyl, fluorine atom-containing alkyl and / or ester group and a silicon dioxide cross-linked network bonded with a fluorine silicon resin backbone. The hardness of a pencil of a coating formed after antifouling paint is solidified is between 4 H and 5 H, the adhesive force reaches 4B to 5B, the lustrousness reaches 86 to 95 when the surface energy is 17.0 - 18.6 mN / m and the incident angle is 60 degrees, grinding traces do not appear after a paper tape is ground 1500 circles, salt mist resistance is as long as 168 hours, and the adhesive force can still reach 4 B after 18 days under constant temperature and constant humidity.

Description

technical field [0001] The invention relates to a fluorosilicone resin, a preparation method thereof and an antifouling coating containing the fluorosilicone resin. Background technique [0002] At present, in order to improve the quality and grade of products, more and more 3C electronic products such as mobile phones, personal computers, notebook computers and personal digital assistants use highly polished metal substrates. feelings. However, since electronic products are often exposed to human sweat and / or oil stains during use, the bright surface is easily contaminated, which affects the aesthetics of the product. Therefore, there is an urgent need to coat a layer of coating with better antifouling ability on the surface of electronic products. In addition to the characteristics of low surface energy, high hardness, high wear resistance and high scratch resistance are also required. [0003] Most of the current antifouling coatings are fluorine-containing acrylate an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/442C08F8/12C09D183/10C09D5/16
Inventor 胡文宫清吴平
Owner BYD CO LTD
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