Nano-silica/polyacrylate organic and inorganic hybrid water-dispersible resin and preparation method thereof

A nano-silica, polyacrylate technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of particle aggregation, achieve good dispersion, mild reaction conditions, avoid The effect of cumbersome workmanship

Inactive Publication Date: 2015-11-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned prior art is all prepared by emulsion polymerization for the preparation of nano-silica / polyacrylate hybrid materials. In the obtained product, inorganic nano-silica particles are dispersed in the interior or surface of the acrylate latex particles. prone to particle agglomeration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix 0.3g of γ-acryloyloxypropyltrimethoxysilane, 0.3g of water, 2.7g of ethanol, and 2 drops of ammonia water with a mass fraction of 25% and add it to 10g of SiO 2 / MMA dispersion, stirred and reacted at 70°C for 12h to obtain modified SiO 2 / MMA dispersion, put into the dropping funnel for use.

[0033] Take 3g of methyl methacrylate, 6g of butyl acrylate, 3g of acrylic acid, 1g of hydroxypropyl acrylate, and 0.3g of azobisisobutyronitrile, mix them evenly, and put them into a dropping funnel to obtain a monomer initiator mixed solution for use .

[0034] Add the mixed solvent of 25g ethanol, 5g diethylene glycol in the four-necked flask that stirring paddle, reflux condenser, thermometer are housed, stirring speed 300rpm, water bath is warming up to 70 ℃, starts to drop monomer initiator mixed solution and Modified SiO 2 / MMA dispersion, wherein the monomer initiator mixture was added dropwise for 3 hours, and the modified SiO 2 The / MMA dispersion was added drop...

Embodiment 2

[0037] Mix 0.43g γ-acryloxypropyltrimethoxysilane, 0.43g water, 3.87g ethanol, and 2 drops of ammonia water with a mass fraction of 25% and add them to 14.3g SiO 2 / MMA dispersion, stirred and reacted at 70°C for 12h to obtain modified SiO 2 / MMA dispersion, put into the dropping funnel for use.

[0038] Take 6g of butyl acrylate, 3g of acrylic acid, 1g of hydroxypropyl acrylate, and 0.3g of azobisisobutyronitrile, mix them evenly, and put them into a dropping funnel for use.

[0039] Add the mixed solvent of 25g ethanol, 5g diethylene glycol in the four-necked flask that stirring paddle, reflux condenser, thermometer are housed, stirring speed 300rpm, water bath is warming up to 70 ℃, starts to drop monomer initiator mixed solution and Modified SiO 2 / MMA dispersion, wherein the monomer initiator mixture was added dropwise for 3 hours, and the modified SiO 2 The / MMA dispersion was added dropwise in 3h20min. After the dropwise addition, raise the temperature to 75°C, add ...

Embodiment 3

[0042] After mixing 0.75g vinyltriethoxysilane, 0.75g water, 6.75g ethanol, and 4 drops of ammonia water with a mass fraction of 25%, add it to 25gSiO 2 / MMA dispersion, stirred and reacted at 70°C for 12h to obtain modified SiO 2 / MMA dispersion, put into the dropping funnel for use.

[0043] Take 10.5g of butyl acrylate, 5.25g of acrylic acid, 1.75g ​​of hydroxypropyl acrylate, and 0.5g of azobisisobutyronitrile, mix them evenly, and put them into a dropping funnel for use.

[0044] Add a mixed solvent of 35g of isopropanol and 5g of diethylene glycol into a four-necked flask equipped with a stirring blade, a reflux condenser, and a thermometer. The stirring speed is 300rpm, and the temperature of the water bath is raised to 70°C. liquid and modified SiO 2 / MMA dispersion, the dropwise addition was completed in 3 hours. After the dropwise addition, raise the temperature to 75°C, add 0.2g of azobisisobutyronitrile after 0.5h of reaction, stop the reaction after 3.5h of rea...

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Abstract

The invention discloses nano-silica/polyacrylate organic and inorganic hybrid water-dispersible resin and a preparation method thereof. According to the method, a silane coupling agent is adopted to modify a methyl methacrylate dispersion liquid of silica at first, and then in-situ polymerization of the modified methyl methacrylate dispersion liquid of silica and acrylate monomers is carried out in a solvent. The nano-silica/polyacrylate organic and inorganic hybrid water-dispersible resin comprises the following ingredients in parts by mass: 20-40 parts of a solvent, 10-40 parts of a modified methyl methacrylate dispersion liquid of silica, 8-14 parts of acrylate monomers, 2-6 parts of acrylic acid, 0.15-0.5 part of an initiator, 1.5-5.5 parts of a pH regulator and 10-30 parts of deionized water. The water-dispersible resin is a pale yellow or pale yellow and slightly-blue semitransparent liquid, is favorable in storage stability, high in coating transparency and good in stain resistance and water resistance, the hardness can be 4H or above and the adhesion can be 1 grade.

Description

technical field [0001] The invention relates to a water-dispersible acrylate resin, in particular to a silicon dioxide-containing organic-inorganic hybrid water-dispersible acrylate resin and a preparation method thereof. The water-dispersible hybrid resin can be used as a film-forming substance for preparation Coatings that combine the excellent properties of inorganic materials and organic polymers. Background technique [0002] Polyacrylate resin has many excellent properties, including high gloss, high adhesion, acid and alkali resistance and weather resistance, etc., and is widely used in the field of coatings and adhesives. However, it also has certain defects, including low hardness, insufficient wear resistance and high temperature resistance, etc., by introducing nano-silica particles with high hardness and high wear resistance into acrylic resin to prepare nano-silica / polyacrylate Resin organic-inorganic hybrid materials can make up for the lack of performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/14C08F220/06C08F220/18C08F220/28C09D151/10C09D5/16
Inventor 皮丕辉陈曦文秀芳徐守萍程江
Owner SOUTH CHINA UNIV OF TECH
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