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Wax-wrapped peroxide microcapsule and preparation method thereof

A peroxide and microcapsule technology, applied in the direction of microcapsule preparation, microsphere preparation, etc., can solve the problems of adverse effects, unsatisfactory stabilization effect, no microcapsule structure, etc., and achieve stable reaction, convenient storage and transportation and The effect of using and improving the strength of the capsule wall

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1374335A discloses a safe free-flowing solid peroxide composition, using a solid diluent in the composition, selected from monovalent or divalent metal salts of fatty acids, without forming a complete microcapsule structure, so the stabilization effect is not ideal , the fatty acid salt added at the same time will have an adverse effect on some polymerization reactions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The ratio of each material is 95g of dibenzoyl peroxide, 56 # Paraffin 5g, emulsifier SP-80 2.0g, absolute ethanol 500g.

[0020] The preparation process is to combine 56 # Dissolve paraffin and absolute ethanol at 60°C, add emulsifier SP-80, keep the stirring speed at 5000~6000r / min, add dibenzoyl peroxide, cool down to 25°C~30°C, vacuum filter to remove solvent, nitrogen Blow dry to obtain wax-coated peroxide microcapsules.

Embodiment 2

[0022] Each material proportioning is dicumyl peroxide 80g, 54 # Paraffin 5g, 58 # Paraffin 15g, emulsifier SP-60 1.5g, isopropanol 300g.

[0023] The preparation process is to combine 54 # Paraffin, 58 # Dissolve paraffin and isopropanol at 80°C, add emulsifier SP-60, keep the stirring speed at 3000~4000r / min, add dicumyl peroxide, cool down to 25°C~30°C, remove the solvent by vacuum filtration, Blow dry with nitrogen to obtain wax-coated peroxide microcapsules.

Embodiment 3

[0025] The ratio of each material is 95g of dibenzoyl peroxide, 52 # Paraffin 5g, 75 # Ozone wax 5g, emulsifier SP-60 1.0g, emulsifier NP-2 0.5g, absolute ethanol 500g, n-butanol 50g.

[0026] The preparation process is to combine 52 # Paraffin, 75 # Dissolve ozokerite, absolute ethanol and n-butanol at 70°C, add emulsifier SP-60 and emulsifier NP-2, keep the stirring speed at 4000~5000r / min, add dibenzoyl peroxide, and cool down to 25°C~30°C, remove the solvent by vacuum filtration, blow dry with nitrogen, and obtain wax-coated peroxide microcapsules.

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PUM

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Abstract

The invention discloses a wax-wrapped peroxide microcapsule and a preparation method thereof. According to the invention, a core material of the microcapsule is a peroxide, and the wall of the microcapsule is wax. The preparation method comprises the following steps: dissolving petroleum wax at a temperature of 50 to 90 DEG C by using a low molecule alcohol as a solvent, adding micro peroxide powder, controlling a stirring speed to be 3000 to 8000 r / min, carrying out cooling to a temperature of 25 to 30 DEG C, removing the solvent through vacuum filtration and carrying out blow drying with nitrogen so as to obtain the wax-wrapped peroxide microcapsule. The wax-wrapped peroxide microcapsule improves thermal stability of the peroxide, is convenient for storage and transportation, is especially applicable as a polymerization initiator and is beneficial for smoothness of reaction.

Description

technical field [0001] The invention belongs to the technical field of peroxide stabilization, in particular to a method for surface coating of peroxide particles to improve peroxide stability. Background technique [0002] Peroxides are widely used as bleaching agents, bactericides, disinfectants, and curing agents. Especially in the polymer polymerization reaction, it is an essential initiator. Because peroxide is thermally unstable, flammable and explosive, it brings inconvenience during storage, transportation and use. [0003] At present, the use of passivating agents is a common technique to improve the thermal stability of peroxides. For water-insoluble peroxides, water is a commonly used passivating agent. But for applications where the presence of water is undesirable, water removal is complex and difficult. CN1181068A discloses a liquid or pasty peroxide dispersion to improve stability, and the desensitizing carrier is water, aliphatic hydrocarbon or aromatic h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/34B01J13/04
Inventor 赵起超
Owner CHINA PETROLEUM & CHEM CORP
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