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Nano TiO2 modified styrene-acrylic emulsion and preparation method thereof

A styrene-acrylic emulsion and nanotechnology, which is applied in the field of architectural coatings, can solve the problems that the nanoparticles cannot be uniformly dispersed, and the modification methods are few, and achieve the effects of improving water resistance, no environmental pollution, and good stability.

Inactive Publication Date: 2012-07-18
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Attracting more and more researchers to engage in the research of this type of emulsion, researchers have carried out a lot of exploration in the preparation of modified styrene-acrylic emulsion with nano-materials, but there are still few effective modification methods. The main reason is It is that the nanoparticles are not uniformly dispersed in the styrene-acrylic emulsion matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Allocation of components according to mass percentage content

[0016] Water 40%, Methyl Methacrylate 20%, Styrene 15%, Butyl Acrylate 20%, Methacrylic Acid 2.0%, Octylphenol Polyvinyl Chloride 1.5%, Sodium Dodecyl Benzene Sulfonate 0.5% , potassium persulfate 0.2%, γ-methacryloxypropyltrimethoxysilane 0.05%, nano TiO 2 0.25%, sodium bicarbonate 0.2%, ammonia 0.3%.

[0017] 2. Preparation steps

[0018] 1. Nano-TiO 2 The surface treatment method: the nano-TiO 2 Put it into a beaker, add a small amount of water and γ-methacryloxypropyltrimethoxysilane to ultrasonically disperse for 60 minutes, then place the dispersion in a three-necked flask and heat it to 80°C in a water bath, condense and reflux for 180 minutes, after the reaction is completed, bake Drying, grinding, and modified nano-TiO 2 ;

[0019] 2. Add 4 / 5 water, butyl acrylate, methyl methacrylate, styrene, methacrylic acid and the modified nano-TiO obtained in step 1 to the emulsifier 2 Perform magn...

Embodiment 2

[0022] 1. Allocation of components according to mass percentage content

[0023] Water 35%, Methyl Methacrylate 15%, Styrene 20%, Butyl Acrylate 22%, Methacrylic Acid 3.0%, Octylphenol Polyvinyl Chloride 2.25%, Sodium Dodecyl Benzene Sulfonate 0.75% , potassium persulfate 0.5%, γ-methacryloxypropyltrimethoxysilane 0.1%, nano TiO 2 0.3%, sodium bicarbonate 0.6%, ammonia 0.5%.

[0024] 2. Preparation steps

[0025] 1. Nano-TiO 2 The surface treatment method: the nano-TiO 2 Put it into a beaker, add a small amount of water and γ-methacryloxypropyltrimethoxysilane to ultrasonically disperse for 56 minutes, then place the dispersion in a three-necked flask and heat it to 78°C in a water bath, condense and reflux for 178 minutes, after the reaction, bake Drying, grinding, and modified nano-TiO 2 ;

[0026] 2. Add 4 / 5 water, butyl acrylate, methyl methacrylate, styrene, methacrylic acid and the modified nano-TiO obtained in step 1 to the emulsifier 2 Perform mixing magnetic s...

Embodiment 3

[0029] 1. Allocation of components according to mass percentage content

[0030] Water 45%, Methyl Methacrylate 15%, Styrene 15%, Butyl Acrylate 15%, Methacrylic Acid 4.0%, Octylphenol Polyvinyl Chloride 3%, Sodium Dodecyl Benzene Sulfonate 1% , potassium persulfate 0.7%, γ-methacryloxypropyltrimethoxysilane 0.1%, nano TiO 2 0.4%, sodium bicarbonate 0.4%, ammonia 0.4%.

[0031] 2. Preparation steps

[0032] 1. Nano-TiO 2 The surface treatment method: the nano-TiO 2 Put it into a beaker, add a small amount of water and γ-methacryloxypropyltrimethoxysilane to ultrasonically disperse for 58 minutes, then place the dispersion in a three-necked flask and heat it to 79°C in a water bath, condense and reflux for 179 minutes, after the reaction is completed, bake Drying, grinding, and modified nano-TiO 2 ;

[0033] 2. Add 4 / 5 water, butyl acrylate, methyl methacrylate, styrene, methacrylic acid and the modified nano-TiO obtained in step 1 to the emulsifier 2 Perform magnetic m...

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Abstract

The invention discloses a nano TiO2 modified styrene-acrylic emulsion and a preparation method thereof. The emulsion comprises the following components in percentage by weight: 15-24 percent of methyl methacrylate, 12-20 percent of styrene, 15-22 percent of butyl acrylate, 35-45 percent of water, 2-5 percent of methacrylic acid, 1.5-3 percent of octylphenol polyvinyl chloride (PVC) ether, 0.5-1 percent of sodium dodecyl benzene sulfonate (SDBS), 0.2-0.6 percent of sodium bicarbonate, 0.2-0.7 percent of potassium peroxydisulfate, 0.3-0.5 percent of ammonia water, 0.25-0.4 percent of nano TiO2 and 0.05-0.1 percent of gamma-methacryloyl trimethoxypropylsilane. The preparation method comprises the following steps of: firstly, modifying the nano TiO2; secondly, preparing a monomer mixed liquor; and finally, modifying the styrene-acrylic emulsion and the monomer mixed liquor by adopting nano TiO2 to prepare the nano TiO2 modified styrene-acrylic emulsion. The nano TiO2 modified styrene-acrylic emulsion has the characteristics of uniformity in dispersion and calcium ion stability and the advantages of water resistance, anti-aging property, scrubbing resistance, simple process, low price and no environmental pollution.

Description

technical field [0001] The present invention relates to a kind of nano TiO 2 Modified styrene-acrylic emulsion and its preparation method. It belongs to the technical field of architectural coatings. Background technique [0002] The preparation of styrene-acrylic emulsion and the modification of nanomaterials have been studied at home and abroad, but the research on the modification of nanomaterials and polymer emulsions is still in its infancy. Attracting more and more researchers to engage in the research of this type of emulsion, researchers have carried out a lot of exploration in the preparation of modified styrene-acrylic emulsion with nano-materials, but there are still few effective modification methods. The main reason is It is that the nanoparticles are not uniformly dispersed in the styrene-acrylic emulsion matrix. In order to solve the existing problems of nanoparticle modified styrene-acrylic emulsion, the present invention adopts nano-material modified styr...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F212/08C08F220/06C08F2/26C08F2/30C08K9/06C08K3/22C09D133/12
Inventor 郭文录张秀荣
Owner JIANGSU UNIV OF SCI & TECH
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