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A kind of water-based silicone resin three-proof coating and preparation method thereof

A water-based silicone and phenyl silicone resin technology, applied in fire-resistant coatings, coatings, etc., can solve problems such as adverse environmental effects, and achieve significant advantages in high temperature resistance, increased heat resistance, and good water solubility.

Active Publication Date: 2021-02-19
山东山科瑞森新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, water-based silicone products are mainly silicone oil and silicone rubber. Silicone resin is usually solid at room temperature without solvent due to its high molecular weight. It is difficult to emulsify it by conventional high-speed dispersion or high-shear dispersion. Solvents or volatile additives, etc. are diluted, so it is difficult to be truly solvent-free, such as the low-VOCs water-based silicone resin emulsion reported in patent CN103339171A
Patent CN101580592B reports a method of modifying the structure of silicone resin with ammonia water, which can make the silicone resin complete self-emulsification. Although the obtained silicone resin emulsion does not contain organic solvents, high-temperature deamination is required in the follow-up, which will still have adverse effects on the environment.

Method used

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  • A kind of water-based silicone resin three-proof coating and preparation method thereof
  • A kind of water-based silicone resin three-proof coating and preparation method thereof
  • A kind of water-based silicone resin three-proof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A water-based silicone resin three-proof coating, the components are as follows in parts by weight:

[0031]

[0032] The elastoplastic phenyl silicone resin containing hexafluorocyclobutyl aryl ether group described in this example has a viscosity (80° C., 6500 mPa·s), and a molar content of alkoxy groups of 2.3%. The average unit formula is: (PhSiO 1.5 ) 0.325 (Me 2 SiO) 0.65 (Me 2 Si-R 4 -Me 2 SiO) 0.025 (R 4 is hexafluorocyclobutylphenyl ether group);

[0033] The oligomeric phenyl silicone resin described in this example is prepared according to the following method: γ-glycidoxypropyltrimethoxysilane 11.3g, phenyltrimethoxysilane 54.2g, methylphenyldimethoxysilane 42.8g, add 2.9g acetic acid, hydrolyze at 70°C for 3 hours, after the reaction is completed, weigh 3.5g of calcium carbonate to neutralize the acetic acid in the hydrolyzate, filter and dry, remove the small molecules that did not participate in the reaction under reduced pressure to obtain th...

Embodiment 2

[0040] A water-based silicone resin three-proof coating, the components are as follows in parts by weight:

[0041]

[0042] The emulsifier is obtained by mixing fatty alcohol polyoxyethylene (5) ether (MOA-5) and fatty alcohol polyoxyethylene (20) ether (Pingpinga O-20) at a mass ratio of 1:1, and the combined HLB value is 13.25;

[0043] The elastoplastic phenyl silicone resin, oligomeric phenyl silicone resin, defoamer, wetting agent, leveling agent, and water-based coating used in this embodiment are the same as in Example 1. , and the performance indexes of the coating before and after curing are shown in Table 1.

Embodiment 3

[0045] A water-based silicone resin three-proof coating, the components are as follows in parts by weight:

[0046]

[0047] The elastoplastic phenyl silicone resin containing hexafluorocyclobutyl aryl ether group described in this example has a viscosity (80° C., 15000 mPa·s) and an alkoxy content of 1.05%. The average unit formula is: (PhSiO 1.5 ) 0.483 (Me 2 SiO) 0.483 (Me 2 Si-R 4 -Me 2 SiO) 0.034 , (R 4 is hexafluorocyclobutylphenyl ether group);

[0048] The oligomeric phenyl silicone resin described in this example was prepared according to the following method: 26.2 g of γ-glycidoxypropyl trimethoxysilane, 28.9 g of γ-methacryloxypropyl trimethoxysilane, phenyl Trimethoxysilane 46.2g, methylphenyldimethoxysilane 76.8g, add 3.8g acetic acid, 70 ℃ hydrolysis reaction for 3h, after the reaction is completed, weigh 4.6g calcium carbonate to neutralize acetic acid in the hydrolyzate, filter and dry 79g of the target product can be obtained by removing the small...

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Abstract

The invention relates to a water-based silicone resin three-proof coating and a preparation method thereof. The elastoplastic phenyl silicone resin containing hexafluorocyclobutyl aryl ether groups is used as a matrix, and the oligomeric phenyl silicone resin is first added for viscosity reduction, and then formulated Using deionized water, emulsifier, defoamer, wetting agent, leveling agent and other related additives, the emulsification is completed under high-speed dispersion, and the water-based silicone resin three-proof coating is prepared. The coating is safe and environmentally friendly, and can be dried quickly at room temperature to form a non-adhesive film. It has excellent comprehensive properties such as high temperature resistance, insulation, and flame retardancy, and can adapt to the protection requirements of various harsh environments.

Description

technical field [0001] The invention relates to a water-based silicone resin three-proof coating and a preparation method thereof, belonging to the technical field of organosilicon polymer materials. Background technique [0002] Three-proof coating is a special formula coating, which is coated on the surface of circuit boards and related equipment to form a protective layer with three-proof capabilities (moisture-proof, mildew-proof, and salt-spray corrosion-proof), so that it can avoid damage from harsh environments. Corrosion damage, thereby improving the service life of equipment, also plays an important role in improving the insulation of circuit boards. At present, according to the matrix resin, there are several major categories of three-proof coatings, such as acrylic resin, polyurethane, silicone, and epoxy resin. As we all know, organosilicon materials combine the properties of inorganic and organic materials, and have excellent high and low temperature resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/08C09D183/04C09D5/18C09D5/25C09D7/20
CPCC08L2201/08C08L2201/10C08L2203/206C08L2205/025C09D5/00C09D5/18C09D183/08C09D7/20C08L83/04
Inventor 牟秋红彭丹张硕张方志王峰李金辉
Owner 山东山科瑞森新材料科技有限公司