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Method for producing polyurothane antibiotic aromatic micro-capsule

A technology of microcapsules and polyurethane, applied in the direction of microcapsule preparation, preparation of microspheres, botanical equipment and methods, etc., can solve the problems of bacteria breeding, low slow release, failure, etc., and achieve strong antibacterial ability and slow release of aroma The effect of high stability and easy processing

Inactive Publication Date: 2008-06-04
华明扬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the problems of unstable capsule wall and irregular porosity, its slow-release property is not high, and the perfume wrapped in it has a short fragrance retention time, and most of these materials are prepared by oily system, and sometimes some monomers are free, which is not easy. Meets environmental requirements, and does not have antibacterial function, it is easy to breed bacteria and fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation

[0021] Oil phase: IPDI 3.33g, jasmine essence 19g, silver-loaded silica 1g, cyclohexane: 25ml.

[0022] Water phase: NaOH (15%) 2ml, deionized water 200ml, sodium alginate 0.3g.

[0023] 3.0 g of polyethylene glycol with a molecular weight of 600.

[0024] 2. Preparation process

[0025] a. According to the above ratio, dissolve 0.3g of sodium alginate with 200ml of deionized water under high-speed stirring,

[0026] b. Mix the oil phase, polyethylene glycol and 40ml of acetone, and add it dropwise to the water phase at 50°C with a stirring speed of 500 rpm, and drop it in 2 hours.

[0027] c, be heated up to 60 ℃, continue to react for 1.5 hours,

[0028] d, carry out suction filtration to crude product, wash,

[0029] e, vacuumize, remove acetone and hexanaphthene, the product is white emulsion.

Embodiment 2

[0031] 1. Preparation

[0032] Oil phase: HDI: 4.12g, mint essence 19g, silver-loaded titanium oxide 1.5g, cyclohexane 25ml

[0033] Water phase: NaOH (15%) 2ml, deionized water: 200ml, sodium alginate: 0.3g polyethylene glycol 3.0g with a molecular weight of 400,

[0034] 2. Preparation method

[0035] a. According to the above ratio, dissolve 0.3g of sodium alginate with 200ml of deionized water under high-speed stirring,

[0036] b. Mix the oil phase, polyethylene glycol and 50ml of acetone, and add it dropwise to the water phase at 50°C with a stirring speed of 600 rpm, and drop it in 1.5 hours.

[0037] c, heat up to 60°C, continue to react for 1 hour,

[0038] d, carry out suction filtration to crude product, wash,

[0039] e, vacuumize, remove acetone and hexanaphthene, the product is white emulsion.

Embodiment 3

[0041] 1. Preparation

[0042] Oil phase: TDI 3.90g, lavender essence 19g, zinc-loaded silicon oxide 2g, cyclohexane 25ml.

[0043] Water phase: NaOH (15%) 2ml, deionized water: 200ml, sodium alginate: 0.3g.

[0044] 3.0 g of polyethylene glycol with a molecular weight of 800.

[0045] 2. Preparation method

[0046] a. According to the above ratio, dissolve 0.3g of sodium alginate with 200ml of deionized water under high-speed stirring,

[0047] b. Mix the oil phase, polyethylene glycol and 60ml of acetone, and add it dropwise to the water phase at 60°C with a stirring speed of 600 rpm, and drop it in 1.5 hours.

[0048] c, heat up to 70°C, continue to react for 1 hour,

[0049] d, carry out suction filtration to crude product, wash,

[0050] e, vacuumize, remove acetone and hexanaphthene, the product is white emulsion.

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PUM

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Abstract

The present invention relates to a preparation method of polyurethane anti-bacterial aromatic microcapsule. Its raw material includes oil phase and water phase, in which the oil phase is formed from polyisocyanate, essence, inorganic anti-bacterial agent and cyclohexane, and the water phase is composed of sodium hydroxide, sodium alginate and deionized water. Its preparation method includes the following several steps: adding polyethylene glycol and acetone into oil phase, mixing them and drop-adding the obtained mixture into water phase for 1.5-2hr, stirring speed is 400-600 rpm at 40-60deg.C, after the drop-addition is completed, heating to 50-70deg.C, making reaction for 1-1.5hr, filtering the obtained product so as to obtain the invented product white emulsion. The grain size of said microcapsule prepared by using the invented method is 20-4 micrometers.

Description

technical field [0001] The invention relates to an aromatic microcapsule for textiles, in particular to the preparation of a polyurethane antibacterial aromatic microcapsule. Background technique [0002] Fragrance microcapsules are composed of spices and encapsulated capsules, with a particle size of 20-40um. Fragrance microcapsules are widely used in the textile industry. The main functions are: to reduce the contact between fragrances 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. In the past, the capsule materials of aromatic microcapsules were mostly made of melamine-formaldehyde resin, gelatin and other materials. Due to the problems of unstable capsule wall and irregular porosity, its slow-release property is not high, and the perfume wrapped in it has a short fragrance retention time, and most of these materials a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M23/12D06M15/564B01J13/02A01N25/28
Inventor 华明扬
Owner 华明扬
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