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Water-in-oil temperature controllable slow-release microcapsule and preparation method thereof

A technology of microcapsules and water-in-oil, applied in the direction of microcapsule preparation, microsphere preparation, etc., can solve the problem of losing the effect of sustained release, the effect of sustained release of microcapsules cannot be guaranteed, and the capsule shell of microcapsules cannot maintain the normal shape and other problems, to achieve the effect of dense shell structure, good sealing performance, and guaranteed properties of the capsule core

Active Publication Date: 2014-12-10
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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  • Water-in-oil temperature controllable slow-release microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use 9g of vinylidene chloride, 4.5g of acrylonitrile, 3.8g of methyl methacrylate, 0.7g of trifunctional acrylate, 1g of azobisisobutyronitrile, 9g of water-soluble flavor, 18g of melamine prepolymer, 5g of PVA, diisobutyronitrile Propylene 150g polypropylene 5g, sodium dodecylbenzene sulfonate 1.5g, span 800.3g, cetyl alcohol 1.0g, put into a 500ml three-necked flask, homogenize at 15000 rpm for 10 minutes under the homogenizer, connect to stir and Condensation and reflux device, the material is kept at 25°C for 8 hours, and after 65°C for 24 hours, it is filtered, 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). The microcapsules have a slow-release effect after being heated 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 15,000 rpm for 8 minutes with a homogenizer, and then stirred And condensing reflux device, the material is kept at 20°C for 8 hours, and after 65°C for 30 hours, it is 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), The microcapsules have a slow-release effect after being heated to 150°C.

Embodiment 3

[0024] Select acrylonitrile 3g, methyl methacrylate 14g, trifunctional acrylate 0.5g, methyl acrylate 0.5g, azobisisobutyronitrile 1g, water-soluble pesticide 9g, melamine prepolymer 18g, PVA 5g, diisopropyl 150g of benzene, 5g of polypropylene, 1.3g of sodium dodecylbenzenesulfonate, 800.3g of span, and 1.0g of cetyl alcohol were put into a 500ml three-necked flask, homogenized at 15,000 rpm for 8 minutes under a homogenizer, followed by stirring and Condensation and reflux device, the material is kept at 10°C for 8 hours, and at 65°C for 48 hours, then filtered, the filter cake is rinsed with n-heptane for 3 times, then dried at 60°C to constant weight to obtain 37g of solid powder (particle size 10-50μm), micro The capsule has a sustained release effect after being heated 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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IPC IPC(8): B01J13/14
Inventor 彭敏康惠敏单文伟李玉新
Owner HUNAN FARIDA TECH CO LTD
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