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Preparation method of organosilicone modified hydroxy acrylic resin aqueous dispersion

A hydroxyacrylic acid, silicone technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor storage stability of acrylic emulsions, and achieve the effect of saving dosage, excellent water and corrosion resistance, and good hydrophilic performance.

Active Publication Date: 2014-05-07
浙江纳宝莱化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly solves the problem of poor storage stability of silicone-modified acrylic emulsion in the past, and the stability of the prepared dispersion is significantly improved

Method used

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  • Preparation method of organosilicone modified hydroxy acrylic resin aqueous dispersion
  • Preparation method of organosilicone modified hydroxy acrylic resin aqueous dispersion
  • Preparation method of organosilicone modified hydroxy acrylic resin aqueous dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Preparation of silicone-modified hydroxyacrylic acid aqueous dispersion

[0053] In a reactor with stirring, cooling and heating devices, add 90g propylene glycol butyl ether, 28.35g tertiary carbonic acid glycidyl ester and 2.4g dodecyl mercaptan, and raise the temperature to 130°C while blowing nitrogen. After reaching a constant temperature, start to add dropwise, which is composed of 42.9g styrene, 69.9g butyl acrylate, 51.9g methyl methacrylate, 75g hydroxypropyl methacrylate, 10.2g acrylic acid, 9.0g tert-amyl peroxyacetate The monomer mixed solution a is controlled to be added dropwise at about 180min. After dropping, start to drop the monomer mixed solution b composed of 6.0g vinyltriisopropoxysilane, 0.3g tert-amyl peroxyacetate, and 24.0g propylene glycol butyl ether, and make it drop in about 10 minutes. After dropping, finally add the monomer mixed solution c composed of 11.4g of acrylic acid and 0.3g of tert-amyl peroxyacetate dropwise, so that the dro...

Embodiment 2

[0062] (1) Preparation of silicone-modified hydroxyacrylic acid aqueous dispersion

[0063] In the reactor with stirring, cooling and heating devices, add 96g propylene glycol methyl ether acetate, 25.2g glycidyl tert-carbonate and 2.4g mercaptoethanol, and heat up to 130°C while blowing nitrogen. After reaching a constant temperature, start dropping 45.9g styrene, 63.9g butyl acrylate, 52.8g methyl methacrylate, 72g hydroxyethyl methacrylate, 16.2g methacrylic acid, 9.0g tert-amyl peroxyacetate The monomer mixed solution a is controlled to be added dropwise at about 180min. After dropping, start to add 9.0g of vinyltriethoxysilane, 0.6g of tert-amyl peroxyacetate, and 24g of propylene glycol butyl ether monomer mixed solution b, and make it drop in about 10 minutes. After dropping, start to add dropwise the monomer mixed solution c of 11.4g of acrylic acid and 0.3g of tert-amyl peroxyacetate, so that the dropwise addition is completed in about 10 to 15 minutes. After drippi...

Embodiment 3

[0071] (1) Preparation of silicone-modified hydroxyacrylic acid aqueous dispersion

[0072]In the reactor with stirring, cooling and heating devices, add 84g butyl acetate, 31.5g glycidyl tert-carbonate and 2.4g dodecyl mercaptan, and raise the temperature to 130°C while blowing nitrogen. After reaching a constant temperature, start to add dropwise, which is composed of 37.5g styrene, 72.9g butyl acrylate, 55.5g methyl methacrylate, 75g hydroxyethyl methacrylate, 9.3g acrylic acid, 9.0g tert-amyl peroxyacetate The monomer mixed solution a is controlled to be added dropwise at about 180min. After dropping, then start by dripping 9.0g vinyl tris (beta-methoxyethoxy) silane, 0.3g tert-amyl peroxyacetate, the monomer mixed solution b that 30.0g propylene glycol butyl ether forms, make it in About 10 minutes to finish dripping. After dropping, start to add dropwise the monomer mixed solution c of 10.5g of acrylic acid and 0.45g of tert-amyl peroxyacetate, so that the dropwise add...

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Abstract

The invention belongs to the field of chemical coatings, and particularly relates to a preparation method of an organosilicone modified hydroxy acrylic resin aqueous dispersion. The method comprises the following steps: preparing an organosilicone modified hydroxy acrylic resin by orderly dropwise adding different mixed liquids; removing part of solvents in the organosilicone modified hydroxy acrylic resin, and carrying out a neutralized salifying reaction; and finally, dispersing the obtained product into water so as to prepare the organosilicone modified hydroxy acrylic resin aqueous dispersion. The method mainly solves a problem that the storage stability of previous organosilicone modified acrylic emulsions is poor, and the stability of the prepared dispersion is significantly improved. A two-component waterborne polyurethane coating prepared through the combination of the dispersion and a waterborne polyisocyanate curing agent has the characteristics of high gloss, good mechanical properties, and good water resistance, weather resistance, corrosion resistance, and the like, and can be applied to the decoration and protection and the like of ocean engineering steel structures, electronic products, transportation facilities and furniture.

Description

technical field [0001] The invention belongs to the field of chemical coatings, and in particular relates to a method for preparing an organic silicon-modified hydroxyacrylic resin aqueous dispersion used for water-based two-component polyurethane coatings. Background technique [0002] Two-component water-based polyurethane coatings have excellent properties such as low film-forming temperature, strong adhesion, good abrasion resistance, high hardness, chemical resistance, and weather resistance. VOC is significantly reduced, and the performance is better than or equal to solvent-based two-component polyurethane coating. Since the 1990s, its development has been very rapid. Compared with solvent-based coatings, it has the advantages of no odor, low VOC and improved wear resistance, and has become the fastest-growing water-based coating variety. In addition to being used as automotive coatings, coil coatings, wood coatings and plastic coatings, two-component waterborne poly...

Claims

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Application Information

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IPC IPC(8): C08F220/28C08F212/08C08F220/18C08F220/14C08F220/06C08F230/08C08F2/06C09D175/04
Inventor 刘志平刘娅莉胡哲辉许斐吕冬福曹银祥金土才
Owner 浙江纳宝莱化工科技有限公司
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