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Preparation method of black monodisperse polymer microspheres

A technology of polymer and black sheet, which is applied in the field of materials, can solve the problems of multiple post-processing processes and cumbersome processes, and achieve the effects of uniform particle size distribution, uniform particle size, and strong crush resistance

Active Publication Date: 2017-06-20
镇江爱邦电子科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to provide a method for preparing black monodisperse polymer microspheres to solve the problems of many post-treatment processes and cumbersome processes in the prior art

Method used

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  • Preparation method of black monodisperse polymer microspheres
  • Preparation method of black monodisperse polymer microspheres
  • Preparation method of black monodisperse polymer microspheres

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preparation example Construction

[0047] (1) Preparation of seed microspheres

[0048] The polymer seed microspheres were prepared by soap-free emulsion polymerization or dispersion polymerization. Both can produce bulbs with excellent properties. See figure 2 , 3.

[0049] The soap-free emulsion polymerization method is to react the monomer, electrolyte and initiator in the nitrogen atmosphere at constant temperature. The monomer is refined styrene, the initiator is water-soluble potassium persulfate (KPS), and the dosage is 1% of the mass of the monomer.

[0050] The dispersion polymerization method is to react the formulated amount of dispersant, initiator and monomer at constant temperature under nitrogen atmosphere. Polyvinylpyrrolidone (PVP) was selected as the dispersant, and the dosage was 13% of the mass of the monomer; azobisisobutyronitrile (AIBN) was selected as the initiator, and the dosage was 7% of the mass of the monomer.

[0051] (2) Preparation of black microspheres

[0052] Black micr...

Embodiment 1

[0064] Take 0.12 g of sodium chloride, add the refined styrene monomer into 100 mL of deionized water and ultrasonically disperse to a homogeneous phase, and then slowly add deoxygenated potassium persulfate aqueous solution (0.002 g / mL) dropwise, After the addition was completed, the nitrogen atmosphere was maintained for 30 min, and then the temperature was raised to 70 °C for constant temperature polymerization in a nitrogen atmosphere for 18 h. After the reaction, the obtained particles were repeatedly centrifuged and washed with deionized water for 7 times, and finally the obtained seed polymer microspheres were redispersed in deionized water, and nitrogen gas was blown in for 30 minutes to remove the residual styrene monomers to obtain Seed bulb lotion.

Embodiment 2

[0066] Weigh 0.6 g of swelling agent and add it to 30 g SDBS aqueous solution for ultrasonic dispersion. After the solution becomes homogeneous, crush it with a cell homogenizer for 5 min, then add 1 g of the seed emulsion into this homogeneous emulsion, and keep the reactor temperature at 30 It was stirred and swelled at ℃ for 12 h to obtain emulsion A.

[0067] The MAA / EGDMA (1:1) monomer emulsion 3g that is dissolved in benzoyl peroxide (mass fraction is 1%), black reactive black dye monomer containing double bond and 30 g SDBS aqueous solution are ultrasonically mixed to obtain the emulsion b. It was added to emulsion A and swelled at 30 °C for 24 h to obtain emulsion C. Add 10 g, 5% polyvinyl alcohol aqueous solution to the above-mentioned emulsion C, pass nitrogen gas for 0.5 h, then raise the temperature to 70 °C, stir and swell for 8 h.

[0068] The obtained polymer microspheres were respectively centrifuged with DMF and ethanol and washed three times with ultrasonic...

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Abstract

The invention provides a method for preparing black monodisperse polymer microspheres, comprising the following steps: using polymer seed microspheres as raw materials, oil-soluble nigrosine as black dye, and polymerizing the polymer seed microspheres by seed swelling polymerization dyeing to prepare black polymer microspheres; then activate the black dye absorbed by the black polymer microspheres through a chemical reaction to form an active reaction intermediate, realize the chemical bond connection between the black dye and the polymer microspheres, and obtain The black monodisperse polymer microspheres. The black monodisperse polymer microspheres prepared by the method of the present invention are different from ordinary dyed microspheres, and have certain pressure resistance, that is, excellent mechanical properties; the black microspheres have a smooth surface and no agglomeration, and have high dispersibility; the black The particle size of the microsphere is uniform, the particle size distribution range is narrow, and its CV value is below 3%.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for preparing black monodisperse polymer microspheres. Background technique [0002] Since the advent of liquid crystal display, it has developed rapidly due to its advantages of stable and non-flickering images, high picture quality, low working voltage, no radiation hazards, light and thin quality, and pure flat large-area display. It is gradually replacing traditional fluorescent screens and is expected to completely Replacing cathode ray tubes as the mainstream technology for display screens. As the liquid crystal display industry has higher and higher requirements for display quality and visual effects, liquid crystal displays are developing in the direction of large-scale and colorful displays. There are many types of liquid crystal display devices. Although the structures of different types and uses of liquid crystal devices will be different, the basic structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/00C08L25/06C08F12/08C08F8/00
Inventor 周际东耿瑞峰赵玉媛于云许虎
Owner 镇江爱邦电子科技有限公司
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