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Preparation method for polystyrene coated silica coating aid

A polystyrene and silica technology, which is applied in coatings, fibrous fillers, dyed polymer organic compounds and other directions, can solve the problems of affecting the performance of nanomaterials, reducing the performance of coatings, dispersing, etc., and achieves the preparation method. Simple, uniform particle size, easy to operate

Inactive Publication Date: 2013-01-23
JIANGSU KAOPULE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] nano-SiO 2 The application of particles as a filler in coatings has attracted more and more attention, but the dispersion of fillers is the key to coating modification. Nano-SiO 2 The uneven dispersion of particles in the coating will reduce the performance of the coating, and a single nano-SiO 2 Due to the strong surface interaction energy, the particles contact each other and agglomerate to form a secondary structure. This aggregation structure may be hard or soft. Soft agglomeration can be dispersed into a primary structure again under the action of shear force, but hard agglomeration is irreversible. , making nano-SiO 2 Particles are getting bigger and bigger, and it is impossible to disperse them again, affecting the performance of nanomaterials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add stabilizer polyvinylpyrrolidone 0.1mmol / ml, 0.10mol L -1 SiO 2 94.5ml of ethanol solution, SiO 2 The particle size range is 10-450nm, distilled water, absolute ethanol; Nitrogen gas is passed into the reactor, and the benzene distilled under reduced pressure that is dissolved in 0.4mmol / ml initiator azobisisobutyronitrile is slowly added dropwise under nitrogen atmosphere. Ethylene 0.4mol / ml; start stirring and keep stirring for 1 hour; raise the temperature of the reactor to 70°C, and centrifuge after 15 hours of reaction; dissolve the separated solid in ethanol to obtain the product polystyrene-coated silica coating Auxiliary, polystyrene-coated silica with a coverage rate of 3%.

Embodiment 2

[0028] Add stabilizer polyvinylpyrrolidone 0.23mmol / ml, 0.10mol L in turn in the reaction kettle -1 SiO 2 94.5ml of ethanol solution, SiO 2 The particle size range is 50-300nm, distilled water, absolute ethanol; In the reactor, feed nitrogen, and slowly add dropwise the benzene that is dissolved in 0.4mmol / ml initiator azobisisobutyronitrile through vacuum distillation under nitrogen atmosphere. Ethylene 0.4mol / ml; start stirring and keep stirring for 2 hours; raise the temperature of the reactor to 75°C, and centrifuge after 10 hours of reaction; dissolve the separated solid in ethanol to obtain the product polystyrene-coated silica coating Auxiliary, polystyrene-coated silica with a coating ratio of 5%.

Embodiment 3

[0030] Add stabilizer polyvinylpyrrolidone 0.3mmol / ml, 0.10mol L -1 SiO 2 ethanol solution? ml, SiO 2 The particle size range is 100-250nm, distilled water, absolute ethanol; Nitrogen gas is passed into the reactor, and the styrene distilled under reduced pressure that is dissolved with 0.6mmol / ml initiator azobisisobutyronitrile is slowly added dropwise under nitrogen atmosphere 0.6mol / ml; start stirring and keep stirring for 3 hours; raise the temperature of the reactor to 85°C, centrifuge after 12 hours of reaction; dissolve the separated solid in ethanol to obtain the product polystyrene-coated silica coating aid Agent, polystyrene-coated silica coating rate of 6%.

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PUM

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Abstract

The invention relates to a preparation method for a polystyrene coated silica coating aid. The method comprises the following steps of: 1) sequentially adding a stabilizing agent, an ethanol solution of SiO2, distilled water and absolute ethanol into a reactor; 2) introducing nitrogen into the reactor, and slowly dripping styrene into which initiator is dissolved and which is distilled under reduced pressure at the atmosphere of nitrogen; 3) beginning to stir, and stirring for 1 to 3 hours; 4) heating the reactor to 70 to 90 DEG C, reacting for 10 to 15 hours and then performing centrifugal separation; and 5) dissolving solids which are obtained through separation in ethanol to obtain a product, namely the polystyrene coated silica coating aid. The preparation method is simple and is easy to operate; and the prepared polystyrene coated silica is uniform in particle size.

Description

technical field [0001] The invention relates to a preparation method of a coating additive, in particular to a preparation method of a polystyrene-coated silica coating additive. Background technique [0002] SiO 2 With its superior stability, reinforcement, thickening and thixotropy, it has always been one of the important fillers for coatings, rubber, plastics and other products; especially in recent years, monodisperse SiO 2 The application of particles on photonic crystals has attracted more scientists to study in this field. With SiO 2 Development of preparation technology, ultrafine SiO 2 , especially nano-SiO 2 Emergence of industrial technology, SiO 2 Particles will be more widely used. [0003] nano-SiO 2 The application of particles as a filler in coatings has attracted more and more attention, but the dispersion of fillers is the key to coating modification. Nano-SiO 2 The uneven dispersion of particles in the coating will reduce the performance of the coa...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/10C09D7/12
Inventor 纪志勇李昊耿雷陶月明
Owner JIANGSU KAOPULE NEW MATERIALS
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