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Isocyanate microcapsule and preparation method thereof

A kind of isocyanate, microcapsule technology

Pending Publication Date: 2022-04-12
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent number is CN201910057948.3, which is a Chinese patent of isocyanate microcapsules and its preparation method. Isocyanate microcapsules are prepared with high molecular polymer as the capsule wall and isocyanate as the microcore. It also solves the problem of short aging and stability of isocyanate sex problem
Although the above three solutions keep the activity of isocyanate relatively high, the structure of the capsule wall is too strong, it is not easy to break the capsule, and the application scenarios are limited, especially restricting its development in the field of self-healing materials

Method used

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  • Isocyanate microcapsule and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of isocyanate microcapsule, it is characterized in that, with isocyanate as microcore, with low melting point organic matter as capsule wall coating described microcore, described isocyanate microcapsule comprises the raw material component of following mass percentage:

[0038] 67% dispersion medium, 12% low-melting organic matter, 2% emulsifier, 18% isocyanate, 1% acid stabilizer.

[0039] Wherein, the dispersion medium is water; the low-melting point organic matter is stearic acid; the emulsifier is sodium carboxymethyl cellulose; the isocyanate is polymethylene polyphenyl polyisocyanate (PAPI); the acid stabilizer is hydrochloric acid.

[0040] The concrete preparation method of isocyanate microcapsule is as follows:

[0041] (1) Stearic acid is heated to melt at 72°C, then polymethylene polyphenyl polyisocyanate is added and mixed uniformly to obtain a dispersed phase;

[0042] (2) Mix sodium carboxymethylcellulose, hydrochloric acid, and water evenly, and ...

Embodiment 2

[0047] A kind of isocyanate microcapsule, it is characterized in that, with isocyanate as microcore, with low melting point organic matter as capsule wall coating described microcore, described isocyanate microcapsule comprises the raw material component of following mass percentage:

[0048] 60% dispersion medium, 12% low melting point organic matter, 2% emulsifier, 25% isocyanate, 1% acid stabilizer.

[0049] Among them, the dispersion medium is simethicone; the low-melting organic matter is solid wax; the emulsifier is sodium lauryl sulfate; the isocyanate is toluene-2,4-diisocyanate; the acid stabilizer is formic acid.

[0050] The concrete preparation method of isocyanate microcapsule is as follows:

[0051] (1) Heat the solid wax at 70°C to melt, then add toluene-2,4-diisocyanate and mix evenly to obtain a dispersed phase;

[0052] (2) Mix sodium lauryl sulfate, formic acid, and simethicone evenly, and heat to 70°C to obtain a continuous phase;

[0053] (3) Add the above...

Embodiment 3

[0056] A kind of isocyanate microcapsule, it is characterized in that, with isocyanate as microcore, with low melting point organic matter as capsule wall coating described microcore, described isocyanate microcapsule comprises the raw material component of following mass percentage:

[0057] 60% dispersion medium, 12% low melting point organic matter, 2% emulsifier, 25% isocyanate, 1% acid stabilizer.

[0058] Among them, the dispersion medium is liquid paraffin; the low melting point organic matter is stearyl alcohol; the emulsifier is castor oil polyoxyethylene ether; the isocyanate is polymethylene polyphenyl polyisocyanate; and the acid stabilizer is phosphoric acid.

[0059] The concrete preparation method of isocyanate microcapsule is as follows:

[0060] (1) Heating stearyl alcohol at 60°C to melt, then adding polymethylene polyphenyl polyisocyanate and mixing evenly to obtain a dispersed phase;

[0061] (2) Mix polymethylene polyphenyl polyisocyanate, phosphoric acid...

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Abstract

The invention discloses an isocyanate microcapsule and a preparation method thereof, and relates to the technical field of microcapsule composite materials. Isocyanate is used as a micro-core, a low-melting-point organic matter is used as a capsule wall to wrap the micro-core, and the isocyanate micro-capsule comprises the following raw material components in percentage by mass: 30-87% of a dispersion medium, 5-40% of isocyanate and 1-30% of the low-melting-point organic matter. According to the isocyanate microcapsule disclosed by the invention, a low-melting-point organic matter is used as a capsule wall, and isocyanate is used as a micro-core; the isocyanate microcapsule can improve the stability of isocyanate, prolong the pot life of isocyanate, block the reaction with active components, solidify liquid isocyanate, control the release of isocyanate, and improve the added value of isocyanate; and meanwhile, the microcapsule has higher activity, is easy to break, can be controlled to release, and can be used as a repairing agent to endow the substrate with self-repairing capability.

Description

technical field [0001] The invention relates to the technical field of microcapsule composite materials, in particular to an isocyanate microcapsule and a preparation method thereof. Background technique [0002] Isocyanate has high activity and its molecular structure is easy to design. It is widely used in various industries, including adhesives, coatings, medicine, agriculture and composite materials. However, because the isocyanate is too high, and part of the isocyanate volatilization has certain toxicity, it is not easy to store and transport; at the same time, the liquid isocyanate is easy to volatilize, releases bad smell, and is harmful to the human body and the environment during use. Therefore, it is necessary to study a kind of isocyanate microcapsule, which can improve the stability by coating the isocyanate with the wall material. [0003] The patent number is CN201610423318.X, a Chinese patent named functional cross-linking agent-isocyanate microcapsules and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04
Inventor 马杨豹王玉周刘笑天于翔张彦华顾继友
Owner HENAN INST OF ENG
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