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Solvent-free organic silicon polysiloxane resin flexible coating and preparation method thereof

A polysiloxane resin and organosilicon technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of difficulty in popularization and application, poor compatibility, high coating price, etc., achieve good application prospects and potential, simple process, and low cost Effect

Pending Publication Date: 2022-07-15
深圳本合纳米科技涂料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because silicone is difficult to dissolve with other resins, the compatibility is poor. In the past, when synthesizing silicone resin for coatings, in order to solve the problem of compatibility, phenyl silicone monomer was introduced to synthesize methylphenyl silicone resin.
Due to the high price of phenylsilane, which is twice as expensive as methyl silicone resin, it is difficult to popularize and apply due to the high price of coatings
Moreover, silicone resin is highly hydrophobic and cannot be made into a water-based coating with suitable performance.
Or synthesize modified silicone resins grafted and copolymerized with organic groups. At present, some products have come out, but their performance has dropped significantly, and the effect is far inferior to that of pure silicone resins.

Method used

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  • Solvent-free organic silicon polysiloxane resin flexible coating and preparation method thereof
  • Solvent-free organic silicon polysiloxane resin flexible coating and preparation method thereof

Examples

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preparation example Construction

[0025] The invention provides a preparation method of a solvent-free organosilicon polysiloxane resin flexible coating, comprising the following steps:

[0026] A) react 107 silicone rubber, methyl silicone oil, filler and brominated polystyrene to obtain base material;

[0027] b) combining the base material obtained in step a) with low-viscosity polysiloxane resin, vinyltrimethoxysilane, colorant, ethyl orthosilicate, tetraisopropyl titanate, γ-aminopropyltriethoxy Silane, γ-(2,3-glycidoxy)propyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and dibutyltin dilaurate were mixed to give Solvent-free silicone polysiloxane resin flexible coating; the viscosity of the low-viscosity polysiloxane resin is 20-200mm 2 / s.

[0028] The present invention firstly reacts 107 silicone rubber, methyl silicone oil, filler and brominated polystyrene to obtain a base material. In the present invention, the 107 silicone rubber is preferably selected from the group whose v...

Embodiment 1

[0065] (1) put monomethyltrichlorosilane (M1) and dimethyldichlorosilane (M2) in a glass-lined reactor in a molar ratio of 1:1 (mass ratio is 150kg: 130kg), slowly drip at room temperature Add 170kg of 90% methanol aqueous solution, start stirring at the same time, feed nitrogen, carry out alcoholysis esterification reaction, reflux methanol into the reaction kettle by reflux condensation, hydrogen chloride enters the absorption device to generate hydrochloric acid; after the dropwise addition, neutralize and filter, After stripping, the viscosity is 100mm 2 / s of silicone resin.

[0066] (2) The viscosity of 10 parts by weight is 5000mm 2 / s 107 silicone rubber, 25 parts by weight, viscosity 50000mm 2 / s 107 silicone rubber, 10 parts by weight viscosity is 500000mm 2 / s 107 silicone rubber, 5 parts by weight with a viscosity of 350mm 2 / s methyl silicone oil, 4 parts by weight of fumed silica, 6 parts by weight of brominated polystyrene, 40 parts by weight of nano-activat...

Embodiment 2

[0070] Using the preparation method provided in Example 1, the difference is: in step (1), the molar ratio of monomethyltrichlorosilane and dimethyldichlorosilane is 1.5:1, and the obtained viscosity is 60mm 2 / s polysiloxane resin; finally prepared into a solvent-free silicone polysiloxane resin flexible coating.

[0071] After testing, the surface dry time (25°C, RH50%) of the solvent-free silicone polysiloxane resin flexible coating prepared in Example 2 of the present invention was 110min, the tack-free time was 15h, and the curing depth in 24h was 2.5mm. After ℃, 168h UV aging oven treatment, the elongation at break is 55%; the properties are shown in Table 1.

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Abstract

The invention provides a solvent-free organic silicon polysiloxane resin flexible coating and a preparation method thereof. The preparation method comprises the following steps: a) reacting 107 silicone rubber, methyl silicone oil, a filler and brominated polystyrene to obtain a base material; b) mixing the base material obtained in the step a) with low-viscosity polysiloxane resin, vinyltrimethoxysilane, a pigment, tetraethoxysilane, tetraisopropyl titanate, gamma-aminopropyltriethoxysilane, gamma-(2, 3-epoxypropoxy) propyltrimethoxysilane, N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane and dibutyltin dilaurate, and performing uniform stirring to obtain a mixture; the solvent-free organic silicon polysiloxane resin flexible coating is obtained; the viscosity of the low-viscosity polysiloxane resin is 20 to 200 mm < 2 > / s. According to the preparation method, specific raw materials are matched with specific process steps, overall better interaction is realized, the prepared solvent-free organic silicon polysiloxane resin flexible coating has the characteristics of rigidity and flexibility, the application range of a product is widened, and the competitiveness of the product is improved.

Description

technical field [0001] The invention relates to the technical field of the production of organosilicon polysiloxane resin flexible coatings, and more particularly, to a solvent-free organosilicon polysiloxane resin flexible coating and a preparation method thereof. Background technique [0002] Silicone is a new type of polymer material. Its polymer main chain is -Si-O-Si-O- bond, and its side group is an organic group. Therefore, it has the characteristics of both inorganic and organic substances, and its high and low temperature resistance is better than Most organic resins have excellent high and low temperature resistance, weather resistance, UV resistance, and stable electrical insulation properties. They can be used not only as special materials for aviation and military use, but also in civil fields. Its application range has been expanded to: construction , electronic and electrical, textile, automobile, machinery, leather and paper, chemical light industry, metal an...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/08C09D7/65
CPCC09D183/04C09D5/08C09D7/65C08L83/04
Inventor 王秀山
Owner 深圳本合纳米科技涂料有限公司
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