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Method for low-density polymeric microspheres without surface permeability by suspension polymerization in-situ closing

A technology of in-situ sealing and suspension polymerization, applied in the direction of coating, etc., to achieve the effect of adjustable density, good mechanical properties and good insulation

Active Publication Date: 2015-09-02
安徽博瑞克科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of the prior art in preparing surface-impermeable low-density polymer microspheres, the present invention provides a method for preparing surface-impermeable low-density polymer microspheres by suspension polymerization in-situ sealing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The basic parameters of the seed polymer microspheres to be sealed: the average diameter is 10 μm, the pore volume ratio is 6.4% (V / V), the average surface micropore diameter is 0.5±0.08 μm, and the density is 0.94 g / cm 3 Polystyrene porous microspheres, the amount of microspheres is 200.0g, the thickness of the initial sealing coating is about 0.05 μm, and the thickness of the final sealing coating is about 0.05 μm.

[0020] Then the total number of seed microspheres is: .

[0021] The addition of styrene monomer in step 1 is calculated according to the thickness of the initial sealing layer, and the calculation formula is , the amount added is .

[0022] The amount of styrene monomer added in step 2 is calculated according to the thickness of the final closed coating, and the calculation formula is , the amount added is .

[0023] The above-mentioned method for preparing surface-impermeable low-density polymer microspheres by in-situ sealing by suspension p...

Embodiment 2

[0028] The basic parameters of the seed polymer microspheres to be sealed: the average diameter is 50 μm, the pore volume ratio is 23.8% (V / V), the average surface micropore diameter is 0.2±0.05 μm, and the density is 0.68 g / cm 3 polystyrene hollow microspheres, the amount of the microspheres is 100.0 g, the thickness of the initial sealing coating is about 3.0 μm, and the thickness of the final sealing coating is about 5.0 μm.

[0029] Then the total number of seed microspheres is: .

[0030] In step 1, the addition of styrene and methyl methacrylate monomer is calculated according to the thickness of the initial sealing layer, and the calculation formula is , the amount added is .

[0031] The amount of styrene and acrylamide monomer added in step 2 is calculated according to the thickness of the final closed coating, and the calculation formula is , the amount added is .

[0032] The method for preparing the surface-impermeable low-density polymer microspheres by...

Embodiment 3

[0037] The basic parameters of the seed polymer microspheres to be sealed: the average diameter is 100 μm, the pore volume ratio is 45.6% (V / V), the average surface micropore diameter is 0.3±0.05 μm, and the density is 0.51 g / cm 3 polystyrene hollow microspheres, the amount of the microspheres is 100.0 g, the thickness of the initial sealing coating is about 1.0 μm, and the thickness of the final sealing coating is about 3.0 μm.

[0038] Then the total number of seed microspheres is: .

[0039] In step 1, the addition amount of N-N dimethylacrylamide and butyl acrylate monomer is calculated according to the thickness of the initial sealing layer, and the calculation formula is , the amount added is .

[0040] The amount of styrene and acrylamide monomer added in step 2 is calculated according to the thickness of the final closed coating, and the calculation formula is , the amount added is .

[0041] The method for preparing the surface-impermeable low-density polym...

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Abstract

The invention relates to a method for low-density polymeric microspheres without surface permeability by suspension polymerization in-situ closing and belongs to the technical field of polymer functional materials. The low-density polymeric microspheres without surface permeability is prepared by the steps: by taking porous or hollow microspheres with low permeability on the surfaces with microchannels as seeds and by virtue of the characteristic that a monomer and a polymer have good affinity, diffusing the monomer to the surfaces of the seed microspheres to form a monomer liquid layer; and then carrying out an in-situ polymerization reaction to obtain a polymer coating to close microsphere surface channels so as to obtain the low-density polymeric microspheres without surface permeability. The polymeric microspheres closed by the method have good performances such as insulativity, light scattering, sound insulation, elasticity, compressive strength and the like and have a wide application prospect in the field of petroleum drilling additives, acid fog inhibition, ultrasound contrast reagents, photoelectric materials, adhesives, paper-making, communication and the like.

Description

technical field [0001] The invention relates to a method for preparing surface non-permeable low-density polymer microspheres by in-situ sealing by suspension polymerization, and belongs to the technical field of polymer functional materials. Background technique [0002] New polymer microspheres have been widely used in various fields. According to different needs, people have been able to prepare new polymer microspheres with various sizes, shapes and microstructures. Among them, hollow or porous polymer microspheres with low-density surface and impermeability have attracted extensive attention in order to meet the special needs in the fields of oil drilling additives and acid mist suppression. [0003] At present, the research work on low-density hollow or porous polymer microspheres mainly focuses on the preparation of special structural characteristics (such as: shell-core , phase separation, etc.), and then assisted by extraction, dialysis, solvent evaporation, etchi...

Claims

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Application Information

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IPC IPC(8): C08J9/36C08F212/08C08F220/14C08F220/56C08F220/54C08F220/18C08F218/08C08F2/18
Inventor 王红何艳萍孙彦琳郭荣鑫祝琳华严峰司甜
Owner 安徽博瑞克科技有限公司
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