Perfluoropolyether modified polysiloxane coating aid, preparation method thereof and coating

A technology of polysiloxane and perfluoropolyether, which is applied in coatings, biocide-containing paints, antifouling/underwater coatings, etc., can solve problems such as uneven spreading, shrinkage cavities, and cracked surfaces, and achieve Excellent hydrophobicity, oil repellency and antifouling effect, eliminate shrinkage cavity and lubrication, and ensure antifouling effect

Inactive Publication Date: 2020-06-05
东莞泰岳先进材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to, aiming at the above-mentioned deficiencies of the prior art, provide a kind of perfluoropolyether modified polysiloxane coating auxiliary agent and its preparation method, coating, through perfluoropolyether carboxylic acid, hydroxyl-containing acrylic acid It is obtained by reacting ester compound, carbon-carbon double bond-containing siloxane and hydrogen-containing silicone oil, which solves the problem of shrinkage, uneven spreading, orange peel, cracking and The problem of uneven surface roughness can not only make the fluorosilicone coating agent spread evenly on the hard substrate, but also promote the surface of the substrate to obtain better hydrophobic, oleophobic and antifouling effects

Method used

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  • Perfluoropolyether modified polysiloxane coating aid, preparation method thereof and coating
  • Perfluoropolyether modified polysiloxane coating aid, preparation method thereof and coating

Examples

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Embodiment 1

[0029] Embodiment 1: A kind of perfluoropolyether modified polysiloxane coating aid provided in this embodiment is made of perfluoropolyether acrylate, carbon-carbon double bond siloxane and hydrogen-containing silicone oil in the catalyst The molar ratio of the perfluoropolyether acrylate, carbon-carbon double bond-containing siloxane and hydrogen-containing silicone oil is 1-9:1-9:1. Among them, perfluoropolyether acrylate is obtained by reacting perfluoropolyether acid chloride with a molar ratio of 1:1-1.5 and a hydroxyl-containing acrylate compound; perfluoropolyether acid chloride is obtained by reacting a molar ratio of 3-8 : 1 Thionyl chloride and perfluoropolyether carboxylic acid react under the action of solvent to obtain; Catalyst is any one in metal catalyst such as rhodium, platinum, nickel or Lewis acid catalyst such as aluminum trichloride, iron trichloride or more; solvents are hydrofluoroether, hexafluorom-xylene, trifluorotrichloroethane, toluene, 1,4-dioxan...

Embodiment 2

[0043] Embodiment 2: a kind of perfluoropolyether modified polysiloxane coating aid provided by this embodiment and its preparation method, coating, it is basically the same as embodiment 1, the difference is:

[0044] Synthesize Rf-COOCH2CH2OC(O)C(CH3)=CH2(PFPE-HEMA) with reference to the method of Example 1: add perfluoropolyether acid chloride ( RfCOCl, Mw=3000, 15g, 0.005mol) and hydroxyethyl methacrylate (HOCH2CH2OCOC(CH3)=CH2), Mw=130.14, 0.6767g, 0.0052mol) and stirred at 30°C for 12h under nitrogen protection; washed with ethanol Remove unreacted acrylate, and remove the ethanol solvent under reduced pressure to obtain perfluoropolyether acrylate.

[0045] Test analysis: in the FTIR analysis, there is a peak associated with the ester group of Rf-C(O)OCH2- (-1794cm -1 ) and the peak associated with CH2OCOCH=CH2 α, β unsaturated ester group (-1735cm -1 ). Store the product sealed for later use.

[0046] With reference to the method of Example 1: under nitrogen protec...

Embodiment 3

[0047] Embodiment 3: a kind of perfluoropolyether modified polysiloxane coating aid provided by this embodiment and its preparation method, coating, it is basically the same as embodiment 1, embodiment 2, difference is:

[0048] Synthesize Rf-COOCH2CH2OC(O)C(CH3)=CH2(PFPE-HEMA) according to the method of Example 2, prepare perfluoro Polyether polysiloxane.

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Abstract

The invention discloses a perfluoropolyether modified polysiloxane coating aid, a preparation method thereof and a coating. Perfluoropolyether acrylate reacts with siloxane containing carbon-carbon double bonds and hydrogen-containing silicone oil under the action of a catalyst to obtain the perfluoropolyether modified polysiloxane coating aid, wherein a feeding molar ratio of perfluoropolyether acrylate to siloxane containing carbon-carbon double bonds to hydrogen-containing silicone oil is (1-9):(1-9):1, and perfluoropolyether acrylate is obtained by reacting perfluoropolyether acyl chloridewith a hydroxyl-containing acrylate compound according to a feeding molar ratio of 1:(1-1.5). Perfluoropolyether carboxylic acid, a hydroxyl-containing acrylate compound, siloxane containing carbon-carbon double bonds and hydrogen-containing silicone oil carry out reactions to prepare the perfluoropolyether modified polysiloxane coating aid. The problem that phenomenon such as cavity shrinkage, uneven spreading, wrinkled surface, cracking, rough and uneven surface, and the like, easily happens in the coating process of a fluorine-silicon coating agent with a high fluorine content is solved, the fluorine-silicon coating agent can be evenly spread on a hard base material, and better hydrophobic, oleophobic and antifouling effects can be achieved on the surface of the base material.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a perfluoropolyether-modified polysiloxane coating aid used as a leveling agent or a lubricant on the surface of a hard substrate for antifouling and the like, as well as its preparation method and coating . Background technique [0002] With the development of science and technology, touch screen electronic equipment, ceramics, plexiglass and lens material polycarbonate are widely used in daily life. During use, a hardened film is often coated on the surface of the hard substrate to protect it For protection, research on substrate surface coating agents has become a hotspot. Coating agents on the surface of hard substrates often use hydrophobic and oleophobic low surface energy coatings. The excellent properties of perfluoropolyether materials and silicone materials have made them important and widely used in coating agents . However, these fluorine-silicon coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/46C09D183/12C09D5/16C03C17/30
CPCC03C17/002C03C17/30C03C2217/76C03C2218/112C08G77/46C09D5/1675C09D183/12
Inventor 宫秀明曾桂阳王久文
Owner 东莞泰岳先进材料有限公司
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