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Weather-proof migration-proof long-acting type microcapsule essence and preparation method thereof

A microcapsule fragrance and migration-resistant technology, which is applied in the direction of microcapsule preparation, microsphere preparation, essential oil/fragrance, etc., can solve the problems of poor compatibility between shell materials and substrates, poor weather resistance and air tightness, and decreased mechanical properties, etc. Problems, achieve the effect of reducing surface electrostatic repulsion, improving heat resistance, and high utilization of raw materials

Active Publication Date: 2014-06-11
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the lawn is exposed to the outdoors, under the conditions of sun exposure, rain erosion, and severe temperature changes, the existing essence microcapsules have poor weather resistance and air tightness, and the fragrance retention time in outdoor occasions is short. Poor tolerance, there are problems of mechanical property degradation and migration, which cannot meet the requirements of outdoor applications

Method used

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  • Weather-proof migration-proof long-acting type microcapsule essence and preparation method thereof
  • Weather-proof migration-proof long-acting type microcapsule essence and preparation method thereof
  • Weather-proof migration-proof long-acting type microcapsule essence and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Prepolymerization

[0054] Add 5.0g of melamine, 9.0g of 37% formaldehyde solution in mass concentration, 0.8g of 50% succinic dialdehyde solution in mass concentration and 100.0g of water in a 500ml three-necked flask equipped with a thermometer, a stirrer and a reflux condenser. 5% sodium hydroxide solution to adjust the pH value to 9, heat up to 70°C for reaction, react until the reaction solution is clarified, and then keep warm for 0.5 hours, then add 1.0g gelatin and continue the heat preservation reaction for 0.5 hours to prepare the amino resin mixed prepolymer solution. to 50°C for later use.

[0055] 2. Emulsification and dispersion

[0056] Add 300.0g of water, 0.4g of carboxymethyl cellulose and 0.35g of gum arabic to a 500ml beaker in turn, turn on the homogeneous emulsifier (model ESR, Shanghai Specimen Model Factory), add 12.5g of lemon flavor plus strong essence (Shanghai Linpa Fragrance Co., Ltd.), emulsified and dispersed at 50°C for 20 minutes to...

Embodiment 2

[0064] 1. Prepolymerization

[0065] Add 3.0 g of melamine, 1.9 g of phenylmelamine, 8.5 g of formaldehyde solution with a mass concentration of 37%, and 1.0 g of butanediol with a mass concentration of 50% in a 500ml three-necked flask equipped with a thermometer, a stirrer and a reflux condenser. Aldehyde aqueous solution and 90.0g water, use the sodium hydroxide solution of mass concentration 5% to adjust the pH value to 9, heat up to 70°C for reaction, react until the reaction solution is clear and keep warm for 0.5 hours, then add 0.8g gelatin and continue the heat preservation reaction for 0.5 hours to prepare The amino resin mixed prepolymer solution was obtained, and the temperature was lowered to 50° C. for later use.

[0066] 2. Emulsification and dispersion

[0067] Add 280.0g of water, 0.5g of carboxymethyl cellulose and 0.4g of gum arabic to a 500ml beaker in sequence, turn on the homogeneous emulsifier (model ESR, Shanghai Specimen Model Factory), add 14g of lem...

Embodiment 3

[0076] 1. Prepolymerization

[0077] Add 4.5g of urea, 8.0g of 37% formaldehyde solution, 1.0g of 50% glutaraldehyde solution and 100.0g of water in a 500ml three-necked flask equipped with a thermometer, a stirrer and a reflux condenser. 5% sodium hydroxide solution to adjust the pH value to 9, heat up to 70°C for reaction, react until the reaction solution is clarified, and then keep warm for 0.5 hours, then add 0.8g gelatin and continue the heat preservation reaction for 0.5 hours to prepare the amino resin mixed prepolymer solution. to 50°C for later use.

[0078] 2. Emulsification and dispersion

[0079] Add 240.0g of water, 0.34g of carboxymethyl cellulose and 0.32g of gum arabic to a 500ml beaker in turn, turn on the homogeneous emulsifier (model ESR, Shanghai Specimen Model Factory), add 12.0g of lemon flavor plus strong flavor (Shanghai Linpa Fragrance Co., Ltd.), emulsified and dispersed at room temperature for 30 minutes to prepare a flavor emulsion for later use....

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Abstract

The invention discloses a weather-proof migration-proof long-acting type microcapsule essence and a preparation method thereof. An oil soluble essence oil is used as a capsule core, and a first wall material layer, a second wall material layer and a third wall material layer are sequentially coated outside the capsule core from inside to outside, the first wall material layer is a terpolymer of gelatin, Arabic gum and carboxymethylcellulose, with a thickness of 0.5-1.5 mu m; the second layer material layer is an amino resin polymer, with a thickness of 1-3 mu m; and the third wall material layer is a polyvinyl alcohol compound with a thickness of 0.5-1.5 mu m. The microcapsule essence disclosed by the invention is a powdery product with good liquidity, and particle size distribution of 1-15 mu m, and is uniformly dispersed in a high polymer material and good in weather resistance and migration resistance. The decompsotion temperature and the softening temperature of the microcapsule essence disclosed by the invention can be about 240 DEG C; and the microcapsule essence is firm in capsule material, and can not be greatly broken in an extrusion molding process.

Description

1. Technical field [0001] The invention relates to a microencapsulated essence and a preparation method thereof, in particular to a weather-resistant migration-resistant long-acting microcapsule essence and a preparation method thereof. 2. Background technology [0002] Essence is a concentrated aromatic oil that is artificially synthesized to imitate the smell of fruits and natural spices. It is an artificial fragrance that can mask odors and release pleasant and comfortable smells. For example, lemon oil can refresh the mind and improve work efficiency, jasmine Oil has soothing and analgesic effects, rose oil (rose oil) has soothing and relaxing effects, etc. Fragrances are mostly liquid substances with strong volatility, short fragrance retention time and poor heat resistance, so they cannot be directly used in polymer materials. Although the existing coating method can improve the heat resistance of the essence microcapsules, the polymer material products containing its...

Claims

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Application Information

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IPC IPC(8): C11B9/00B01J13/14
Inventor 吕建平唐国睿
Owner HEFEI UNIV OF TECH
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