Water-based organic silicon anti-cracking anticorrosive coating and preparation method thereof

A technology of anti-corrosion coatings and silicones, applied in anti-corrosion coatings, coatings, etc., can solve the problems of high price, lack of anti-cracking, and inability to apply anti-corrosion fields, etc., to achieve reduced VOC emissions, good mechanical stability, and good anti-cracking Effects of performance and compactness

Active Publication Date: 2019-12-31
杭州赛肯新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only two companies that can form stable silicone emulsion products on the market, but the silicone emulsions are used to prepare high-temperature resistant coatings, and are expensive, and cannot be applied to the anti-corrosion field, and do not have anti-cracking effects

Method used

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  • Water-based organic silicon anti-cracking anticorrosive coating and preparation method thereof
  • Water-based organic silicon anti-cracking anticorrosive coating and preparation method thereof
  • Water-based organic silicon anti-cracking anticorrosive coating and preparation method thereof

Examples

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preparation example Construction

[0053] A kind of preparation of waterborne organosilicon anti-cracking anticorrosion paint, comprises the following steps:

[0054] (1) Preparation of silicone flexible emulsion,

[0055] Put polysiloxane, nano-silica, non-ionic emulsifier and simethicone oil with a viscosity of 400-2000mPa·s into a 250ml flask, stir at room temperature for 5-10min at a speed of 1500r / m, and then use ultrasonic Disperse for 10 minutes, slowly add 73g of deionized water to the dispersed material under stirring condition, the rotation speed is 1500-2000r / m, and disperse evenly to prepare a silicone flexible emulsion.

[0056] As a preference, the polysiloxane includes: α, ω-dihydroxypolydimethylsiloxane, α, ω-dihydroxypolymethylphenylsiloxane, α, ω-diethoxypolydimethicone Methylsiloxane, α,ω-Diethoxypolymethylphenylsiloxane, α,ω-Dihydroxypolydiethylsiloxane, α,ω-Dihydroxypolymethyltrifluoropropyl One or more of siloxanes, viscosity: 400-2000mPa·s.

[0057] As a preference, nano-SiO 2 It is h...

Embodiment 1

[0072] The preparation of component A of water-based silicone anti-cracking anti-corrosion coating is as follows: add 10.0 g of deionized water into a beaker, and then add dispersant: 0.2 g, defoamer: 0.3 g, rutile titanium dioxide: 5.0g, nano zinc oxide: 0.5g, sericite: 5.0g, barium sulfate: 3.0g, anti-rust filler: 10.0g, coloring pigment: 2.0g, stir well and pour into horizontal sand Grind and disperse in the mill until the fineness is less than or equal to 50μm, and add PH regulator: 0.3g, silicone flexible emulsion: 45.0g, anti-flash rust agent: 0.8g, thickener: 0.3g, adjust the viscosity of the coating to 800±200mPa·s, and filter to obtain component A of the water-based silicone anti-cracking and anti-corrosion coating.

[0073] Wherein: the preparation method of organosilicon flexible emulsion is:

[0074] The preparation of silicone flexible emulsion is as follows: 100g of polysiloxane with a viscosity of 2000mPa s, 5.0g of nano silicon dioxide, 5.0g of nonionic emulsi...

Embodiment 2

[0080] The preparation of component A of the water-based silicone anti-cracking anti-corrosion coating is as follows: add 20.0 g of deionized water into a beaker, and then add dispersant: 0.35 g, defoamer: 0.4 g, rutile titanium dioxide: 12.5g, nano zinc oxide: 1.25g, sericite: 10.0g, barium sulfate: 6.5g, anti-rust filler: 20g, coloring pigment: 6.0g, stir well and pour into horizontal sand mill Grind and disperse in the machine until the fineness is less than or equal to 50μm, and then add PH regulator: 0.45g, organic silicon flexible emulsion: 52.5g, anti-flash rust agent: 0.9 to the mixed liquid whose fineness reaches the standard under the stirring condition of 500-600r / m g, Thickener: 0.75g, adjust the viscosity of the coating to 800±200mP·s, and obtain component A of the water-based silicone anti-cracking and anti-corrosion coating after filtration.

[0081] Wherein: the preparation method of organosilicon flexible emulsion is:

[0082] The preparation of silicone flex...

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Abstract

The invention discloses a water-based organic silicon anti-cracking anticorrosive coating and a preparation method thereof. The coating consists of a component A and a component B, wherein the component A and the component B are mixed according to a ratio of 10:(1-1.1) when the coating is used. The formula of the component A comprises the following component in parts by mass: 45-60 parts of an organic silicon flexible emulsion, wherein the formula of the organic silicon flexible emulsion comprises a linear organic silicon polymer, hydrophobic fumed silica and a nonionic emulsifier. The formulaof the component B comprises the following components in parts by mass: 40-50 parts of a trifunctional crosslinking agent, 40-50 parts of a tetrafunctional crosslinking agent, 20-25 parts of a coupling agent, 1.0-1.5 parts of a catalyst and 3-5 parts of a nonionic emulsifier. According to the formula, organosilicon anti-cracking anti-corrosion coating with excellent performance is prepared into the water-based organosilicon anti-cracking anti-corrosion coating, and the structural adjustment effect of the cross-linking agents on resin is ensured by the preparation method, so that good anti-cracking performance and compactness of a cured coating layer are ensured.

Description

technical field [0001] The invention relates to the field of coating chemical industry, in particular to a water-based organosilicon anti-cracking anti-corrosion coating and a preparation method thereof. Background technique [0002] At present, because the bond energy (422.5kJ / mol) of the Si-O bond in the main chain of the silicone polymer molecule is significantly greater than the bond energy (344.4kJ / mol) of the C-C bond in the molecular main chain of the traditional resin, the silicone material is used in many aspects. It exhibits characteristics superior to traditional coating resins, such as: excellent weather resistance, acid and alkali resistance, and high and low temperature resistance, and then the molecular chain space structure after film formation can be designed to give the coating excellent flexibility and crack resistance Wait. [0003] The silicone anti-corrosion coating prepared from this silicone polymer has excellent salt spray resistance, weather resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/08C09D7/61C09D7/62
CPCC08K2003/2241C08K2003/2296C08K2003/3045C08K2201/011C08L2201/08C08L2205/025C09D5/08C09D183/04C09D7/61C09D7/62C09D7/70C08L83/04C08K13/06C08K7/26C08K3/22C08K3/34C08K3/30C08K3/36
Inventor 樊波徐梦祥张彬余钢蒋亦舒
Owner 杭州赛肯新材料技术有限公司
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