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Isocyanate curing agent with fluorescence characteristic and preparation method thereof

A technology with isocyanate and fluorescent properties, applied in the field of fluorescent materials, can solve problems such as application limitations of organic fluorescent small molecule materials, achieve good mechanical properties, simplify the preparation process, and avoid powder drop effects.

Inactive Publication Date: 2017-05-10
SUZHOU JIREN HIGH TECH MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to this aggregation quenching effect, the application of traditional organic fluorescent small molecule materials in fluorescent paints is limited

Method used

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  • Isocyanate curing agent with fluorescence characteristic and preparation method thereof
  • Isocyanate curing agent with fluorescence characteristic and preparation method thereof
  • Isocyanate curing agent with fluorescence characteristic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An isocyanate curing agent with fluorescent properties, the raw materials needed to prepare the product include:

[0022] Polymethylene polyphenyl isocyanate (product of China Wanhua Chemical Group Co., Ltd., its model is: PM200) and (E)-4,4'-dihydroxytetraphenylethylene, wherein polymethylene poly The mass ratio of phenyl isocyanate to (E)-4,4'-dihydroxytetraphenylethylene is 99:1, and the chemical structural formula of (E)-4,4'-dihydroxytetraphenylethylene is as follows:

[0023]

[0024] Isocyanate curing agents with fluorescent properties are prepared by the following steps:

[0025] The first step: dissolving polymethylene polyphenylisocyanate and (E)-4,4'-dihydroxytetraphenylethylene in xylene solvent, the concentration of the mixture is: 10g / ml;

[0026] The second step: under the protection of nitrogen, the temperature is raised to 80 ° C, and the reaction is stirred for 2 hours at a speed of 2000 rpm;

[0027] The third step: Evaporate the obtained product...

Embodiment 2

[0029] A kind of isocyanate curing agent with fluorescent properties, the raw materials needed for preparing the product include: polymethylene polyphenyl isocyanate (product of China Wanhua Chemical Group Co., Ltd., its model is: PM200) and (E)- 4,4'-dihydroxytetraphenylethylene, wherein the mass ratio of polymethylene polyphenylisocyanate to (E)-4,4'-dihydroxytetraphenylethylene is 95:5, (E)- The chemical structural formula of 4,4'-dihydroxytetraphenylethylene is as follows:

[0030]

[0031] Isocyanate curing agents with fluorescent properties are prepared by the following steps:

[0032] The first step: dissolving polymethylene polyphenylisocyanate and (E)-4,4'-dihydroxytetraphenylethylene in tetrahydrofuran solvent, the concentration of the mixture is: 5g / ml;

[0033] The second step: under the protection of nitrogen, the temperature was raised to 70°C, and the reaction was stirred for 4 hours at a speed of 1500 rpm;

[0034] The third step: Evaporate the obtained pr...

Embodiment 3

[0036] An isocyanate curing agent with fluorescent properties, the raw materials needed to prepare the product include:

[0037] Polymethylene polyphenyl isocyanate (product of China Wanhua Chemical Group Co., Ltd., its model is: PM200) and (E)-4,4'-dihydroxytetraphenylethylene, wherein polymethylene poly The mass ratio of phenyl isocyanate to (E)-4,4'-dihydroxytetraphenylethylene is 90:10, and the chemical structural formula of (E)-4,4'-dihydroxytetraphenylethylene is as follows:

[0038]

[0039] Isocyanate curing agents with fluorescent properties are prepared by the following steps:

[0040] The first step: dissolving polymethylene polyphenylisocyanate and (E)-4,4'-dihydroxytetraphenylethylene in butyl acetate solvent, the concentration of the mixture is: 4g / ml;

[0041] The second step: under the protection of nitrogen, the temperature was raised to 60°C, and the reaction was stirred for 6 hours at a speed of 1000 rpm;

[0042] The third step: Evaporate the obtained ...

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Abstract

The invention discloses an isocyanate curing agent with fluorescence characteristic and a preparation method thereof. The raw materials for preparing the isocyanate curing agent with fluorescence characteristic include polymethylene polyphenyl isocyanate and (E)-4,4'-dihydroxyl tetraphenylethylene, wherein the mass ratio of the polymethylene polyphenyl isocyanate to (E)-4,4'-dihydroxyl tetraphenylethylene is (99:1)-(80:20). The preparation scheme comprises the following steps: dissolving the polymethylene polyphenyl isocyanate and (E)-4,4'-dihydroxyl tetraphenylethylene in certain solvent, stirring and heating for reacting for certain time; cooling; and evaporating with a rotary evaporator to remove the solvent to obtain the designed product solvent. In the invention, the preparation technology of fluorescent paint is simplified, and the defect of aggregation-induced quenching effect easily caused by adopting traditional organic fluorescent molecules is overcome.

Description

technical field [0001] The invention relates to the field of fluorescent materials, in particular to an isocyanate curing agent with fluorescent properties and a preparation method thereof. Background technique [0002] Paints based on polyurethane resin are usually used for topcoats, which have a great influence on the properties of coatings. With the development of science and technology and the improvement of living standards, the requirements for coating topcoats are getting higher and higher. In addition to good mechanical properties, including good hardness, scratch resistance, toughness, etc., other requirements have been added, such as special optical, electrical, and acoustic properties, to be used in some special occasions. If the topcoat coating has fluorescent properties, it can be applied in decoration, photosensitive and other fields. [0003] Fluorescent paint is a fast-drying enamel with bright colors. The fluorescent paint is colored with sunlight fluoresce...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/32C09D175/06C09D175/08C09D5/22C09K11/06
CPCC08G18/7664C08G18/3215C09D5/22C09D175/06C09D175/08C09K11/06C09K2211/1007
Inventor 李为立徐泽孝
Owner SUZHOU JIREN HIGH TECH MATERIAL CO LTD
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