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Fluorine modified epoxy polysiloxane coating and preparation method and application thereof

An epoxy polysiloxane and polysiloxane technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of loss of anti-corrosion function, short anti-corrosion life, chemical bond breakage, etc., to shorten the surface drying time and prolong the service life. and maintenance time, the effect of low VOC

Active Publication Date: 2016-11-09
湖北山虎涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current anti-corrosion coatings, because the main chain of the film-forming material is composed of C-C bonds, are prone to chemical bond breakage under the irradiation of ultraviolet light, thus losing the anti-corrosion function, resulting in a short anti-corrosion life; therefore, the development of high weather resistance Anti-corrosion coatings have become an important direction of current coatings research, the key is to prepare high-performance resins
[0004] Since the main chain of polysiloxane is mainly composed of Si-O-Si bonds, its chemical bond energy (422.5KJ / mol) is much larger than that of C-C chemical bond energy (345.6KJ / mol). Therefore, its resin has super Strong UV resistance, chemical resistance, heat resistance and other excellent properties, but polysiloxane resin is used as a heavy-duty anti-corrosion coating and has the characteristics of low strength and poor adhesion

Method used

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  • Fluorine modified epoxy polysiloxane coating and preparation method and application thereof
  • Fluorine modified epoxy polysiloxane coating and preparation method and application thereof
  • Fluorine modified epoxy polysiloxane coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the fluorine-modified epoxy polysiloxane coating includes component A and component B, and the mass parts of each component are as follows,

[0028] Component A:

[0029]

[0030] Component B:

[0031] 15 parts of fluorine-modified aminosilane;

[0032] BASF BAXXODUR TM EC 252 1 part.

[0033] Wherein, the preparation process of the fluorine-modified aminosilane is as follows: In a dry 1000mL three-necked flask equipped with a condenser and mechanically stirred, 82.4g of N-(β-aminoethyl)-γ-aminopropylmethyl dimethoxy Silane, 178.4g perfluoroiodohexane, 30gK 2 CO 3 , 50mL isopropanol solvent, react at a temperature of 50-55°C under nitrogen protection for 12 hours, cool down to 20°C, filter off K 2 CO 3 The isopropanol solvent was removed under reduced pressure to obtain liquid transparent fluorine-modified aminosilane. The reaction process is as follows:

[0034]

[0035] The preparation process of fluorine-modified epoxy polysiloxane ...

Embodiment 2

[0045] In this embodiment, the fluorine-modified epoxy polysiloxane coating includes component A and component B, and the mass parts of each component are as follows,

[0046] Component A:

[0047]

[0048] Component B:

[0049] 17 parts of fluorine-modified aminosilane;

[0050] BASF BAXXODUR TM EC 252 2 copies.

[0051] Wherein, the preparation process of the fluorine-modified aminosilane is as follows: In a dry 1000mL three-necked flask equipped with a condenser and mechanically stirred, 82.4g of N-(β-aminoethyl)-γ-aminopropylmethyl dimethoxy Silane, 178.4g perfluoroiodohexane, 30gK 2 CO 3 , 50mL isopropanol solvent, react at a temperature of 50-55°C under nitrogen protection for 12 hours, cool down to 20°C, filter off K 2 CO 3 The isopropanol solvent was removed under reduced pressure to obtain liquid transparent fluorine-modified aminosilane. The reaction process is as follows:

[0052]

[0053] The preparation process of fluorine-modified epoxy polysiloxan...

Embodiment 3

[0062] In this embodiment, the fluorine-modified epoxy polysiloxane coating includes component A and component B, and the mass parts of each component are as follows,

[0063] Component A:

[0064]

[0065]

[0066] Component B:

[0067] 20 parts of fluorine-modified aminosilane;

[0068] BASF BAXXODUR TM EC 252 3 copies.

[0069] Wherein, the preparation process of the fluorine-modified aminosilane is as follows: In a dry 1000mL three-necked flask equipped with a condenser and mechanically stirred, 82.4g of N-(β-aminoethyl)-γ-aminopropylmethyl dimethoxy Silane, 178.4g perfluoroiodohexane, 30gK 2 CO 3 , 50mL isopropanol solvent, react at a temperature of 50-55°C under nitrogen protection for 12 hours, cool down to 20°C, filter off K 2 CO 3 The isopropanol solvent was removed under reduced pressure to obtain liquid transparent fluorine-modified aminosilane. The reaction process is as follows:

[0070]

[0071] The preparation process of fluorine-modified epoxy...

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Abstract

The invention provides a fluorine modified epoxy polysiloxane coating and a preparation method and application thereof. The defects that polysiloxane is low in intensity and poor in binding power are relieved through siloxy groups, epoxy groups and hydroxyl groups, the prepared fluorine modified epoxy polysiloxane coating has the long-acting antiseptic property, therefore, the service life and maintenance duration of steel are prolonged, and remarkable social benefits and economic benefits are achieved. Through fluorine modification, the ultraviolet light resistance is improved, and the water resistance of a paint film is improved. By means of introduction of modified alicyclic amine to participate in a curing reaction, the flexibility of the paint film is improved, and the surface drying time of the paint film is shortened. Through good matching of the coating with zinc-rich primer and an intermediate coating, the current requirements for corrosion protection and ultra-long weather fastness can be met; the fluorine modified epoxy polysiloxane coating is free of isocyanate, low in toxicity, environmentally friendliness, high in solid content and low in VOC, and the environment protection requirement of modern antiseptic coating can be met.

Description

technical field [0001] The invention relates to the technical field of heavy-duty anti-corrosion coatings for steel surfaces, in particular to a fluorine-modified epoxy polysiloxane coating and a preparation method and application thereof. Background technique [0002] In the field of heavy anti-corrosion, such as bridges, ships, port machinery, containers, and petrochemical storage tanks, anti-corrosion coatings are particularly important for steel anti-corrosion. It is increasingly urgent to improve the anti-corrosion performance of anti-corrosion coatings and prolong their service life. [0003] The current anti-corrosion coatings, because the main chain of the film-forming material is composed of C-C bonds, are prone to chemical bond breakage under the irradiation of ultraviolet light, thus losing the anti-corrosion function, resulting in a short anti-corrosion life; therefore, the development of high weather resistance Anti-corrosion coatings have become an important di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/08C09D5/08C09D7/12C08G77/388
CPCC08G77/388C08K3/346C08L2201/08C09D5/08C09D7/61C09D7/63C09D7/65C09D183/08C08L91/06
Inventor 徐楚沅刘世江梁基码
Owner 湖北山虎涂料有限公司
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