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A water-in-oil temperature-controllable slow-release microcapsule and its preparation method

A microcapsule, water-in-oil technology, applied in the directions of microcapsule preparation, microsphere preparation, etc., can solve the problem of losing the effect of sustained release, the capsule shell of the microcapsule cannot maintain a normal shape, and cannot guarantee the effect of sustained release of the microcapsule. and other problems, to achieve the effect of compact structure and good sealing

Active Publication Date: 2016-03-09
HUNAN FARIDA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing research on microcapsules uses a single-layer shell, and the release condition is slow release at room temperature. The single-shell microcapsule products produced by traditional technology can only be applied to microcapsules without much treatment before use. However, in some specific cases, such as vulcanization of rubber, the microcapsules first need to undergo high-temperature treatment at 140-180 degrees. release effect, CN102899168B discloses a double-layer coated essence microcapsule and its preparation method. This product uses a double-layer shell to improve the sustained-release effect, but it cannot guarantee that the microcapsule still has a sustained-release effect after high temperature

Method used

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  • A water-in-oil temperature-controllable slow-release microcapsule and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select vinylidene chloride 9g, acrylonitrile 4.5g, methyl methacrylate 3.8g, trifunctional acrylate 0.7g, azobisisobutyronitrile 1g, water-soluble flavor 9g, melamine prepolymer 18g, PVA 5g, diisopropyl Benzene 150g, polypropylene 5g, sodium dodecylbenzenesulfonate 1.5g, span800.3g, cetyl alcohol 1.0g, put into a 500ml three-neck flask, homogenize at 15000rpm for 10 minutes with a homogenizer, then stir and condense to reflux device, the material is kept at 25°C for 8 hours, and after 65°C for 24 hours, it is filtered, and the filter cake is rinsed twice with n-heptane and then dried at 60°C to constant weight to obtain 35g of solid powder (particle size 10-50μm). It has a sustained release effect after heating to 90°C.

Embodiment 2

[0022] Select 13g of acrylonitrile, 3.8g of methyl methacrylate, 0.7g of trifunctional acrylate, 0.5g of methyl acrylate, 1g of azobisisobutyronitrile, 9g of ethylene glycol, 16g of melamine prepolymer, 5g of PVA, diisopropyl 150g of benzene, 5g of polypropylene, 1.2g of sodium dodecylbenzenesulfonate, 0.3g of Tween, and 1.0g of cetyl alcohol were put into a 500ml three-necked flask, homogenized at 15000rpm for 8 minutes under the homogenizer, and then connected with stirring and Condensation and reflux device, the material is kept at 20°C for 8 hours, and at 65°C for 30 hours, then filtered, the filter cake is rinsed with n-heptane for 3 times and then dried at 60°C to constant weight to obtain 35g of solid powder (particle size 10-50μm), micro The capsule has a sustained release effect after being heated to 150°C.

Embodiment 3

[0024] Select 3g of acrylonitrile, 14g of methyl methacrylate, 0.5g of trifunctional acrylate, 0.5g of methyl acrylate, 1g of azobisisobutyronitrile, 9g of water-soluble pesticide, 18g of melamine prepolymer, 5g of PVA, and diisopropylbenzene 150g, polypropylene 5g, sodium dodecylbenzene sulfonate 1.3g, span800.3g, cetyl alcohol 1.0g, put into a 500ml three-neck flask, homogenize at 15000rpm for 8 minutes with a homogenizer, then stir and condense to reflux device, the material was kept at 10°C for 8 hours, and after 48 hours at 65°C, it was filtered, and the filter cake was rinsed with n-heptane for 3 times and then dried at 60°C to constant weight to obtain 37g of solid powder (particle size 10-50 μm). It has a slow-release effect after heating to 180°C.

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Abstract

The invention discloses a water-in-oil temperature controllable slow-release microcapsule. The water-in-oil temperature controllable slow-release microcapsule is characterized in that the microcapsule is provided with a capsule core and a double-layer coating capsule shell, wherein the capsule core is a water soluble core material; the double-layer coating capsule shell is composed of an inner shell and an outer shell; the inner shell is formed by gradually separating out and depositing melamine-glutaraldehyde-PVA resin on an oil-water interface in water phase reaction; the outer shell is formed by separating out a monomer with a double-bond functional group from a dispersion phase via prepolymerization reaction and gradually depositing on the surface of the microcapsule. The water-in-oil temperature controllable slow-release microcapsule prepared by the invention can be used for solving the problem of rapid invalidation of the existing microcapsule product at the vulcanization temperature (120-180 DEG C) when being applied to rubber vulcanization.

Description

technical field [0001] The invention relates to a water-in-oil temperature-controllable slow-release microcapsule and a preparation method thereof. Background technique [0002] Microcapsule technology is a technology in which trace substances are wrapped in polymer films, and is a micro-packaging technology for storing solids, liquids, and gases. Specifically, it means that a certain object (core material) is completely covered with various natural or synthetic polymer compound continuous films (wall materials), and then the target object is released through some external stimulation or sustained release. Functionality is presented externally again. [0003] Most of the existing research on microcapsules uses a single-layer shell, and the release condition is slow release at room temperature. The single-shell microcapsule products produced by traditional technology can only be applied to microcapsules without much treatment before use. However, in some specific cases, suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/14
Inventor 彭敏康惠敏单文伟李玉新
Owner HUNAN FARIDA TECH CO LTD