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A kind of preparation technology of sio2 microcapsule modified water-based acrylic antiseptic emulsion

A water-based acrylic and microcapsule technology, used in anti-corrosion coatings, coatings, etc., can solve the problems of demulsification and inability to apply water-based coating systems, and achieve the effect of improving water resistance and increasing density

Active Publication Date: 2019-02-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high cationic characteristics of polyethyleneimine aqueous solution, it is easy to adsorb with the anionic emulsifier in the water-based coating and cause the system to break the emulsion, so it cannot be applied to the water-based coating system.

Method used

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  • A kind of preparation technology of sio2 microcapsule modified water-based acrylic antiseptic emulsion
  • A kind of preparation technology of sio2 microcapsule modified water-based acrylic antiseptic emulsion
  • A kind of preparation technology of sio2 microcapsule modified water-based acrylic antiseptic emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Disperse 1 kg of polyethyleneimine with a number average molecular weight of 4000 in 3 kg of 95% ethanol to prepare a polyethyleneimine-95% ethanol dispersion. In another reactor, add 0.5kg tetraethyl orthosilicate (TEOS) and 5kg absolute ethanol, at 20°C, slowly add 0.2kg of the above polyethyleneimine-95% ethanol dispersion, age for 10 hours, centrifuge , dried to SiO 2 Microcapsules (hereinafter referred to as SiO 2 Microcapsules).

[0026] Stir 2.5g sodium lauryl sulfate, 2.5g nonylphenol polyoxyethylene ether, 0.3kg deionized water at a speed of 1000rpm until completely dissolved, add 0.25kg styrene, 0.3kg butyl acrylate, 0.05kg triallyl base isocyanurate, and continued to stir for 0.5 hour to obtain a core layer pre-emulsion.

[0027] Add 5g sodium lauryl sulfate, 5g fatty alcohol polyoxyethylene ether of commercial brand AEO-9, 1.2kg deionized water, stir at a speed of 1000rpm until completely dissolved, add 1.5kg styrene, 1.3kg butyl acrylate ester, 0.1kg me...

Embodiment 2

[0031] Disperse 1 kg of polyethyleneimine with a number average molecular weight of 20000 in 5 kg of 95% ethanol to prepare a polyethyleneimine-95% ethanol dispersion. In another reactor, 0.5kg of tetraethyl orthosilicate (TEOS) and 1.5kg of absolute ethanol were slowly added dropwise at 30°C with 0.2kg of the above polyethyleneimine-95% ethanol dispersion, aged for 10 hours, and centrifuged , dried to SiO 2 Microcapsules (hereinafter referred to as SiO 2 Microcapsules).

[0032]Stir 14g sodium dodecyl diphenyl ether disulfonate, 7g fatty alcohol polyoxyethylene ether of commercial brand AEO-9, 0.6kg deionized water at a speed of 1000rpm until completely dissolved, add 0.3kg methyl methacrylate, 0.7kg of butyl acrylate, 0.06kg of divinylbenzene, and 0.16kg of trimethylolpropane trimethacrylate were stirred for 0.5 hours to obtain a core layer pre-emulsion.

[0033] 24g sodium dodecyl diphenyl ether disulfonate, 12g fatty alcohol polyoxyethylene ether of trade name AEO-9, 1....

Embodiment 3

[0037] Disperse 1 kg of polyethyleneimine with a number average molecular weight of 60000 in 8 kg of 95% ethanol to prepare a polyethyleneimine-95% ethanol dispersion. In another reactor, 0.5kg of tetraethyl orthosilicate (TEOS) and 1kg of absolute ethanol were slowly added dropwise at 40°C to 0.2kg of the above polyethyleneimine-95% ethanol dispersion, aged for 10 hours, centrifuged, Dried to SiO 2 Microcapsules (hereinafter referred to as SiO 2 Microcapsules).

[0038] 4.5g allyloxy nonylphenol propanol polyoxyethylene ether ammonium sulfate, 2.8g nonylphenol polyoxyethylene ether, 0.4kg deionized water, stir at 1000rpm until completely dissolved, add 0.6kg styrene, 0.3kg acrylic acid Butyl ester, 0.1kg methacrylic acid, continue to stir for 0.5 hour, make core layer pre-emulsion.

[0039] 20g allyloxy nonylphenol propanol polyoxyethylene ether ammonium sulfate, 12.5g nonylphenol polyoxyethylene ether, 1.6kg deionized water, stir at a speed of 1000rpm until completely dis...

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Abstract

The invention discloses a preparation process of SiO2 microcapsule modified water-based acrylic anticorrosion emulsion. The technical scheme includes the following steps in sequence: (1) configuring polyethyleneimine and 95% ethanol into a dispersion liquid with a certain concentration; In the mixed solution of orthoethyl silicate (TEOS) and ethanol, add above-mentioned polyethyleneimine-95% ethanol dispersion solution dropwise, make the nano-SiO2 microcapsule of wrapping polyethyleneimine after aging; (3) styrene , methyl methacrylate, butyl acrylate and other monomers and SiO2 microcapsules wrapped with polyethyleneimine were copolymerized to prepare SiO2 microcapsule modified water-based acrylic anticorrosion emulsion. This method can introduce cationic compounds into the anionic emulsion system; when the film is formed, the microcapsule structure is broken, and the water resistance, adhesion and water resistance of the coating are greatly improved by the reaction of the highly reactive imine group and the carboxyl group and other hydrophilic functional groups. Salt spray performance.

Description

technical field [0001] The invention relates to the field of preparation of water-based anticorrosion coatings, in particular to a SiO 2 Preparation process of microcapsule modified water-based acrylic anticorrosion emulsion. Background technique [0002] Metal materials such as iron and steel are exposed to the outdoor environment and are subject to the joint action of oxygen, rainwater and atmospheric pollutants, which are prone to surface corrosion and cause major property losses. Anti-corrosion coatings achieve anti-corrosion purposes by forming a physical isolation layer on the metal surface with organic polymer materials to prevent the penetration of corrosive elements. In order to improve the anti-corrosion effect of coatings, polymer materials must have good compactness, adhesion and structural stability after film formation. At present, in order to improve the performance of anti-corrosion coatings on the market, most of them use solvent-based products, and there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F212/08C08F220/18C08F226/06C08F220/06C08F220/22C08F220/14C08F212/36C08F220/28C08F222/14C08F220/56C08F2/26C08F2/30C08F2/44C08K9/10C08K3/36C09D151/08C09D5/08
CPCC09D151/08C08F2/26C08F2/30C08F2/44C08F283/06C08F283/065C08K3/36C08K9/10C09D5/08C08F222/103C08F220/1804C08F220/281
Inventor 方永勤梅俊龙王瑾卞政许亮
Owner CHANGZHOU UNIV