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Organosilicone modified acrylate resin and preparation method thereof and hydrophobic weatherproof slow-release modified acrylic resin coating

A technology of acrylic resin and acrylate, applied in fire-resistant coatings, coatings, etc., can solve problems such as large differences, poor anti-corrosion performance, poor compatibility, etc., and achieve improved compatibility, excellent hydrophobicity, and low surface energy. Effect

Active Publication Date: 2019-06-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical modification method is mainly to introduce polysilane into acrylate by grafting, which can inhibit the migration of organosilicon molecules to the surface to a certain extent, thereby improving the compatibility between the two. There is a large difference in polarity and acrylate, poor compatibility, and there is still phase separation
In addition, the hydrophobicity, high temperature resistance, and weather resistance of the existing organosilane-modified acrylate are improved, but the anti-corrosion performance is not good

Method used

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  • Organosilicone modified acrylate resin and preparation method thereof and hydrophobic weatherproof slow-release modified acrylic resin coating
  • Organosilicone modified acrylate resin and preparation method thereof and hydrophobic weatherproof slow-release modified acrylic resin coating
  • Organosilicone modified acrylate resin and preparation method thereof and hydrophobic weatherproof slow-release modified acrylic resin coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]① Preparation of silicone oligomer

[0037] Add the mixed solution of monomer 19.20g phenyltriethoxysilane, 11.84g dimethyldiethoxysilane, 7.62g vinyltriethoxysilane into the reactor, stir and raise the temperature to 80°C, slowly drop Add 9.36g of distilled water and 0.09g of hydrochloric acid mixed solution as hydrolysis raw material and catalyzer, after dropwise addition, after constant temperature reaction 5h again, start vacuum distillation, pressure is controlled at 0.06MPa, evaporates the small molecules and water that produce in the reaction process, Cool to room temperature, adjust pH to neutral with ammonia water, and obtain organosilicon oligomer.

[0038] ② Preparation of silicone modified acrylic resin

[0039] Pour 6.25g of silicone prepolymer into a three-necked flask, and add 20g of solvent (ethyl acetate: butyl acetate = 1:1). After stirring and raising the temperature to 70°C, add acrylic acid mixed monomer (8.2g methyl methacrylate, 5.3g butyl acryla...

Embodiment 2

[0045] ① Preparation of silicone oligomer

[0046] Add the mixed solution of monomer 38.4g phenyltriethoxysilane, 23.68g dimethyldiethoxysilane, 15.20g vinyltriethoxysilane into the reactor, stir and raise the temperature to 80°C, slowly drop Add 26.2g distilled water and 0.17g hydrochloric acid mixed solution as hydrolysis raw material and catalyzer, after dropwise addition, after constant temperature reaction 6h again, start vacuum distillation, pressure is controlled at 0.06MPa, evaporates the small molecules and water that produce in the reaction process, Cool to room temperature, adjust pH to neutral with ammonia water, and obtain organosilicon oligomer.

[0047] ② Preparation of silicone modified acrylic resin

[0048] Pour 6g of silicone resin prepolymer into a three-necked flask, and add 20g of solvent (ethyl acetate:butyl acetate=1:1). After stirring and raising the temperature to 70°C, add acrylic acid mixed monomer (7.4g methyl methacrylate, 8.4g butyl acrylate, 0...

Embodiment 3

[0054] Prepare organosilicon-modified acrylic resin and nano-modified SiO as embodiment 1 step 1., 2. 2 .

[0055] Add 80 parts of resin and 5 parts of organically modified mixed nanoparticles into a disperser for dispersion, and add 35 parts of mixed solvent (butyl acetate: toluene: propylene glycol methyl ether acetate = 5:3:2) as a diluent, to be dispersed After uniformity, add 16 parts of N75 curing agent (hexamethylene diisocyanate), and a total of 4 parts of BYK series wetting agent, leveling agent, and defoamer, and evenly coat the tinplate and perform constant temperature curing.

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Abstract

The invention discloses an organosilicone modified acrylate resin and a preparation method thereof and a hydrophobic weatherproof slow-release modified acrylic resin coating. Organosilane oligomers are synthesized by hydrolysis condensation of organosiloxane, the organosilane oligomers are pre-polymerized with part of acrylic resin monomers and then polymerized with the remaining acrylic resin monomers to obtain the organosilicone modified acrylic resin. The organosilicone modified acrylic resin, an isocyanate curing agent, a filler, a solvent, auxiliary agents and the like are compounded to obtain an integrated protective material with relatively good hydrophobicity, high temperature resistance, weather resistance and corrosion resistance.

Description

technical field [0001] The invention relates to an organosilicon-modified acrylate resin and a preparation method thereof, and also relates to a hydrophobic weather-resistant slow-release coating using an organosilicon-modified acrylic resin as a matrix resin, belonging to the field of coatings. Background technique [0002] As a commonly used important chemical product, coatings are widely used in almost all walks of life, such as construction, aviation, ships, automobiles, etc., and play functional roles such as appearance decoration, weather resistance, and anti-corrosion. With the development of engineering technology, special working environments are becoming more and more common, and coatings used in harsh environments have become an important research content. As resin is the basic part of organic coatings, the research and development of resins that can be used as protective materials with high temperature resistance, multi-purpose and excellent performance has becom...

Claims

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Application Information

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IPC IPC(8): C09D151/08C09D5/18C09D7/62C08G77/20C08F283/12C08F220/14C08F220/18C08F220/20C08F212/08C08G18/63C08G18/73
Inventor 周涛李欢蒋伟滨
Owner CENT SOUTH UNIV