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Method for preparing polyurethane anti-mosquito fragrant microcapsules

A technology of microcapsules and polyurethane, applied in botany equipment and methods, pest control, chemicals for biological control, etc., can solve problems such as difficult processing, no resilience of capsule materials, and difficult degradation, etc., to achieve easy Processing, high aroma sustained release, high mosquito repellent effect

Inactive Publication Date: 2008-04-16
华明扬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The capsule material is not easy to degrade, the safety and environmental protection are poor, and the capsule material has no resilience, the synthesis control is difficult, and it is not easy to process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation materials of microcapsules

[0021] Oil phase: IPDI: 3.33g, lavender: 19g, cyclohexane: 25g;

[0022] Water phase: NaOH (15% aqueous solution): 2g, deionized water: 200g, DEET: 1.2g, sodium alginate: 0.3g;

[0023] PEG-600: 3.0g.

[0024] 2. Preparation of microcapsules

[0025] 1. According to the above ratio, dissolve sodium alginate with 200g deionized water under stirring.

[0026] 2. Add the oil phase, PEG-600 and 40g of acetone solution to the water phase at the same time at 50°C and a stirring speed of 500 rpm, and drop them in 2 hours.

[0027] 3. Raise the temperature to 60°C and continue the reaction for 1.5 hours.

[0028] 4. Vacuum to remove acetone and cyclohexane. The product was a white emulsion.

[0029] The particle size of the microcapsule prepared by the method is 5-10um, and the mass ratio of the capsule material and the core material of the microcapsule is 1:2.2-3. It is a kind of polyurethane anti-mosquito aromatic microcapsul...

Embodiment 2

[0031] 1. Preparation materials of microcapsules

[0032] Oil phase: HDI: 4.12g, camphor tree extract: 19g, cyclohexane: 25g;

[0033] Water phase: NaOH (15% aqueous solution): 2g, deionized water: 200g, pyrethrin: 1.5g, sodium alginate: 0.3g;

[0034] PEG-400: 3.0g;

[0035] 2. Preparation of microcapsules

[0036] 1. According to the above ratio, dissolve sodium alginate with 200g deionized water under stirring.

[0037] 2. Add the oil phase, PEG-400 and 40g of acetone solution to the water phase at the same time at 50°C and a stirring speed of 500 rpm, and drop them in 2 hours.

[0038] 3. Raise the temperature to 60°C and continue the reaction for 1.5 hours.

[0039] 4. Vacuumize to remove acetone and cyclohexane. The product was a white emulsion.

Embodiment 3

[0041] 1. Preparation materials of microcapsules

[0042] Oil phase: TDI: 3.90g, fragrance: 19g, cyclohexane: 25g;

[0043] Water phase: NaOH (15% aqueous solution): 2g, deionized water: 200g, mosquito repellant: 1.8g, sodium alginate: 0.3g;

[0044] PEG-800: 3.0g.

[0045] 2. Preparation of microcapsules

[0046] 1. According to the above ratio, dissolve sodium alginate with 200g deionized water under stirring.

[0047] 2. The oil phase, PEG-800 and 40g of acetone solution were added dropwise to the water phase at the same time at 50°C and the stirring speed was 500 rpm, and the drop was completed within 2 hours.

[0048] 3. Raise the temperature to 60°C and continue the reaction for 1.5 hours.

[0049] 4. Vacuumize to remove acetone and cyclohexane. The product was a white emulsion.

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Abstract

The invention relates to a preparation method of polyurethane anti-mosquito aromatic microcapsule, oil phase of prepared material mainly comprises polyisocyanate, perfume and cyclohexane; water phase mainly comprises sodium hydroxide, sodium alginate, anti-mosquito agent and deionized water; the preparation method is that: the oil phase and acetone solution of polyethylene glycol are respectively dripped into water phase at the same time, heated and dripped while being stirred, dripping can be finished in 1.5-2 hours, and the stirring speed is controlled at 400-600 rpm, temperature is maintained at 40-60 degree centigrade, and temperature is raised to 50-70 degree centigrade when dripping is finished, reaction is performed for 1-1.5 hours, crude product vacuum desolvent is obtained, and the final product is white emulsion. The invention uses polyurethane material as capsule material, which is more environmental friendly, and the capsule material has certain resilience for easy manufacturing.

Description

technical field [0001] The invention relates to a preparation method of polyurethane anti-mosquito aromatic microcapsules. It is mainly used for anti-mosquito and fragrance enhancement of fabrics in the textile industry. It belongs to the technical field of textile auxiliaries. Background technique [0002] The anti-mosquito fragrance microcapsules are composed of spices, mosquito repellents and capsule materials wrapped around the spices and mosquito repellents, with a particle size of 5-10um. Anti-mosquito fragrance microcapsules are widely used in the textile industry. The main functions are: to reduce the contact between the fragrance and the outside world, thereby preventing the fragrance from volatilizing too quickly, reducing the loss of fragrance, having a certain slow-release effect, and prolonging the fragrance retention time; it can effectively Prevent mosquito bites. At present, melamine materials are usually used as capsule materials. The capsule material is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M23/12A01N53/00A01P17/00
Inventor 华明扬
Owner 华明扬
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