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Method for preparing polyurethane fragrant microcapsules

A technology of microcapsules and polyurethane, applied in the field of preparation of polyurethane aromatic microcapsules, can solve the problems of low sustained release, irregular porosity, not meeting environmental requirements, etc., and achieve the effects of high sustained release of aroma and easy processing.

Inactive Publication Date: 2008-06-25
江阴市诺科生物新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its unstable capsule wall and irregular porosity, its sustained release is not high, and the perfume wrapped in it has a short fragrance retention time, and most of these materials are prepared by oily systems, and sometimes some monomers are free.
Does not meet environmental requirements

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, 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, cyclohexane 25ml.

[0033] Water phase: NaOH (15%) 2ml, deionized water: 200ml, sodium alginate: 0.3g.

[0034] 3.0 g of polyethylene glycol with a molecular weight of 400.

[0035] 2. Preparation method

[0036] a. According to the above ratio, dissolve 0.3g of sodium alginate with 200ml of deionized water under high-speed stirring,

[0037] 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.

[0038] c, heat up to 60°C, continue to react for 1 hour,

[0039] d, carry out suction filtration to crude product, wash,

[0040] e, vacuumize, remove acetone and hexanaphthene, the product is white emulsion.

Embodiment 3

[0042] 1. Preparation

[0043] Oil phase: TDI 3.90g, lavender essence 19g, zinc-loaded silicon oxide 2g, cyclohexane 25ml.

[0044] Water phase: NaOH (15%) 2ml, deionized water: 200ml, sodium alginate: 0.3g.

[0045] 3.0 g of polyethylene glycol with a molecular weight of 800.

[0046] 2. Preparation method

[0047] a. According to the above ratio, dissolve 0.3g of sodium alginate with 200ml of deionized water under high-speed stirring,

[0048] 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.

[0049] c, heat up to 70°C, continue to react for 1 hour,

[0050] d, carry out suction filtration to crude product, wash,

[0051] e, vacuumize, remove acetone and hexanaphthene, the product is white emulsion.

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PUM

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Abstract

The invention relates to a manufacture method for polyurethane aroma microcapsule that is made up of polyisocyanate, essence and cyclohexane. Water phase is made up of sodium hydroxide, sodium acetylide, and deionized water. It includes the following steps: adding polyethylene glycol and acetone into oil phase, dropping into water phase for 1.5-2 hours, whisking at 400-600 rounds per minutes, keeping temperature at 40-60 degree centigrade, heating to 50-70 degree centigrade, taking reaction for 1-1.5 hour, filtering the product. The diameter of microcapsule is 20-4um, and it has high slow releasing ability. The machining of the microcapsule is convenient.

Description

technical field [0001] The invention relates to an aromatic microcapsule for textiles, in particular to the preparation of a polyurethane 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, the sustained-release performance is not high, and the perfume wrapped with it has a short fragrance retention time, and most of these materials are p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M23/12B01J13/02C08G18/00
Inventor 华明扬
Owner 江阴市诺科生物新材料科技有限公司
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