Preparation of monodisperse styrene-acrylic composite emulsion nanoparticles

A technology of styrene-acrylic composite emulsion and nano particles, which is applied in the field of styrene-acrylic composite emulsion, can solve the problems of uneven distribution and uneven size, and achieve the effects of narrow particle size distribution, low cost, and simple technical methods

Active Publication Date: 2012-11-14
JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products produced by the existing technology have problems such as uneven size and uneven distribution, which limit their application to a certain extent.

Method used

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  • Preparation of monodisperse styrene-acrylic composite emulsion nanoparticles
  • Preparation of monodisperse styrene-acrylic composite emulsion nanoparticles
  • Preparation of monodisperse styrene-acrylic composite emulsion nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 1.4g of styrene, 0.5g of sodium lauryl sulfate, and 60g of deionized water into a four-necked flask, and pre-emulsify with magnetic stirring at 75°C for 30min, and adjust the pH of the system at 8.0~9.0. Prepare a pre-emulsion. Add 0.01 g of ammonium persulfate to carry out seed emulsion polymerization, and keep warm for 30 minutes. Then add 0.12g of ammonium persulfate and 2g of sodium lauryl sulfate, and 12.6g of styrene, 16g of butyl methacrylate, and 1.5g of KH-570 mixed monomers, and add dropwise to the seed emulsion within 2 hours by controlling the rate of addition In, carry out polymerization, heat preservation reaction 5h. Finally, the temperature was lowered to 50°C and filtered to obtain a silicon-containing nano-scale polyacrylate composite emulsion.

[0029] figure 1 It is the infrared spectrogram of the composite latex film of the present embodiment. figure 1 Medium for PBMA, 1725cm -1 The place is the infrared characteristic absorption peak cause...

Embodiment 2

[0033] Add 1 g of styrene, 0.5 g of sodium dodecylbenzene sulfonate, and 60 g of deionized water into a four-neck flask, pre-emulsify with magnetic stirring at 75 °C for 35 min, and adjust the pH value with 25% sodium carbonate At 8.0~9.0, a pre-emulsion is prepared. Then add 0.01 g of ammonium persulfate to carry out seed emulsion polymerization, and keep warm for 30 minutes. Then add 0.09g ammonium persulfate and 1.5g sodium dodecylbenzenesulfonate, and 16g styrene, 15g butyl methacrylate, and 1.5g KH-571 mixed monomer, and control the rate of addition dropwise to In the seed emulsion, keep warm for 5 hours. Finally, the temperature was lowered to 40° C. and filtered to obtain a silicon-containing nano-scale polyacrylate composite emulsion. The latex particles are small spherical, evenly distributed and uniform in size, and the size of the particles is about 60-70nm.

Embodiment 3

[0035] Add 1.5g of styrene, 0.5g of allyloxy hydroxypropyl sodium sulfonate, and 50g of deionized water into a four-necked flask, and pre-emulsify with magnetic stirring at 80°C for 40min. Adjust the pH value at 8.0~9.0 to prepare the pre-emulsion. Then add 0.03 g of ammonium persulfate to carry out seed emulsion polymerization, and keep the temperature for 40 minutes. Then add 0.09g of ammonium persulfate and 1.5g of allyloxy hydroxypropyl sodium sulfonate, and 12.5g of styrene, 16g of butyl methacrylate, and 3g of KH-572 mixed monomer, and add them dropwise to the seeds within 3h. In the emulsion, keep warm for 4 hours. Finally, the temperature was lowered to 30°C and filtered to obtain a silicon-containing nano-scale polyacrylate composite emulsion. The latex particles are small spherical, evenly distributed and uniform in size, and the size of the particles is about 60-70nm.

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Abstract

The invention relates to a styrene-acrylic composite emulsion, particularly preparation of silicon-containing styrene-acrylic composite emulsion nanoparticles, which comprises the following steps: 1. pre-emulsification: adding an emulsifier and a seed monomer to carry out pre-emulsification; 2. adding an initiator to carry out seed emulsion polymerization; and 3. adding the rest of monomer, emulsifier, initiator and silane coupling agent into the polymerization system to carry out polymerization, thereby obtaining the silicon-containing nano polyacrylate composite emulsion. The whole preparation process has a definite procedure and is simple to operate. By adopting free radical copolymerization, the silicon-containing acrylates are introduced into the styrene-acrylic polymer emulsion by copolymerization, thereby preparing the monodisperse nano silicon-containing styrene-acrylic emulsion. The product integrates the advantages of silicon and nano styrene-acrylic emulsion. The monodisperse styrene-acrylic composite emulsion has small-size effect, surface effect, quantum size effect, macroscopic tunneling effect and the like. Therefore, related materials have electric, magnetic, thermal and optical sensitivity, and the surface stability is obviously different from that of micron particles. The invention relates to the application fields of chemistry, materials, biology, medicine, textile, paper making and the like, and has high use value.

Description

technical field [0001] The invention relates to a styrene-acrylic composite emulsion, in particular to the preparation of silicon-containing styrene-acrylic composite emulsion nanoscale particles. Background technique [0002] Styrene-acrylic emulsion has excellent weather resistance, gloss and color retention and chemical resistance, and has been widely used in architectural coatings, adhesives, textile auxiliaries and other fields. The products produced by the existing technology have problems such as non-uniform size and uneven distribution, which limit their application to a certain extent. Contents of the invention [0003] The purpose of the present invention is to overcome the problem of product uniformity in the prior art, and prepare a styrene-acrylic emulsion containing silicon-containing monodisperse nano-scale particles by introducing a silane coupling agent. The dispersion coefficient of all products is 0.044~0.079, and the particle size is 60~70nm, which is ...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F212/08C08F230/08C08F2/24C08F220/14C08F220/28
Inventor 姜彦李彬张洪文
Owner JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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