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Polyurethane mixed microcapsule and preparation method thereof

A technology of ester microcapsules and polyurethane, which is applied in the field of microcapsule preparation, can solve problems such as poor repair effect and poor heat resistance, and achieve good uniformity, good compatibility, good heat resistance and impermeability

Active Publication Date: 2017-08-29
WUHAN TEXTILE UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Generally, the microcapsules dispersed in the matrix are single microcapsules, and this kind of repair often has problems such as poor repair effect and poor heat resistance.

Method used

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  • Polyurethane mixed microcapsule and preparation method thereof
  • Polyurethane mixed microcapsule and preparation method thereof
  • Polyurethane mixed microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of polyurethane mixed microcapsules, comprises the following steps:

[0043] S1: Preparation of polyurethane-coated isocyanate microcapsules:

[0044] Take 80ml of silicone oil for distillation to remove the water and living wave hydrogen atoms, then take 17.4g of toluene diisocyanate (TDI) and disperse dropwise in the silicone oil to obtain the first dispersion, stir the first dispersion at 600r / min until the dispersion appears fine Then add 3g of ethylene glycol dropwise to the first dispersion liquid under the condition of 600r / min stirring, after reacting for 1 hour, add 25ml acetone to the first dispersion liquid to carry out polyurethane polymerization reaction, TDI and Ethylene glycol is polymerized to form a polyurethane wall layer, and TDI is wrapped by the polyurethane wall layer to form an isocyanate core layer. After the polymerization reaction is completed, it is washed in turn, suction filtered, and naturally air-dried to obtain polyur...

Embodiment 2

[0050] The preparation method of polyurethane mixed microcapsules, comprises the following steps:

[0051] S1: Preparation of polyurethane-coated isocyanate microcapsules:

[0052] Take 80ml of silane for distillation to remove the water and active hydrogen atoms, then take 15g of diphenylmethane diisocyanate (MDI) and disperse it dropwise in silane to obtain the first dispersion, and stir the first dispersion at 2000r / min until dispersed Fine particle-like droplets appeared in the liquid, and then 5g of diethylene glycol was added dropwise to the first dispersion under the condition of stirring at 2000r / min. After reacting for 1 hour, 25ml of acetone was added to the first dispersion to carry out polyurethane polymerization. , MDI and diethylene glycol are polymerized to form a polyurethane wall layer, and the MDI is wrapped by the polyurethane wall layer to form an isocyanate core layer. After the polymerization reaction is completed, it is washed in turn, suction filtered, ...

Embodiment 3

[0058] The preparation method of polyurethane mixed microcapsules, comprises the following steps:

[0059] S1: Preparation of polyurethane-coated isocyanate microcapsules:

[0060] Take 80ml of cyclohexane for distillation to remove the water and living wave hydrogen atoms, then take 20g of diisocyanate and disperse dropwise in cyclohexane to obtain the first dispersion, stir the first dispersion at 1000r / min until the dispersion appears fine Granular micro-droplets, then add 2g of 1,4-butanediol dropwise to the first dispersion liquid under the condition of 1000r / min stirring, after reacting for 1 hour, add 25ml acetone to the first dispersion liquid to carry out polyurethane polymerization reaction , diisocyanate and 1,4-butanediol are polymerized to form a polyurethane wall layer, and the diisocyanate is wrapped by the polyurethane wall layer to form an isocyanate core layer. After the polymerization reaction is completed, it is washed in sequence, suction filtered, and nat...

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Abstract

The invention relates to the field of microcapsule preparation, and in particular relates to a polyurethane mixed microcapsule and a preparation method thereof. The polyurethane mixed microcapsule includes a polyurethane-coated isocyanate microcapsule, a polyurethane-coated hydroxyl compound microcapsule and an auxiliary agen; a wall layer of the polyurethane-coated isocyanate microcapsule is polyurethane, a core layer is isocyanate; a wall layer of the polyurethane-coated hydroxyl compound microcapsule is the polyurethane, a core layer is a hydroxyl compound; the auxiliary agent is a polyurethane catalyst. The prepared polyurethane mixed microcapsule has good spandex compatibility, heat resistance and impermeability.

Description

technical field [0001] The invention relates to the field of microcapsule preparation, in particular to a polyurethane mixed microcapsule and a preparation method thereof. Background technique [0002] As a kind of elastic fiber, spandex is used more and more at home and abroad. At the same time, the spandex waste silk formed by its damage and micro cracks is a kind of white pollution. In order to reduce environmental pollution and save resources, researchers began to study self-healing polyurethane microcapsules, a repairing material, for the microcracks of spandex waste silk. For example, "Research progress of self-healing materials based on microcapsule technology, Proceedings of the Third Cross-Strait Textile Science and Technology Symposium, p 67-74" records "The microcapsule self-healing system is composed of self-healing components and composite materials. The repair component includes microcapsules and catalysts that encapsulate the repair agent (initiating repair p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14B01J13/22C08G18/32C08G18/36
CPCB01J13/14B01J13/22C08G18/3206C08G18/36
Inventor 李沐芳王栋牛应买潘瑞彬蒋海青赵青华
Owner WUHAN TEXTILE UNIV
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