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Hyperbranched polyurethane containing epoxy groups as well as preparation method and application thereof

A technology of hyperbranched polyurethane and epoxy group is applied in the field of hyperbranched polyurethane to achieve the effects of high yield and simple preparation process

Inactive Publication Date: 2015-11-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the reaction of a large number of active end groups of the hyperbranched polymer and the matrix resin, the crosslinked network structure of the cured product can be improved, so as to achieve the purpose of toughening and improving heat resistance. Different functionalities in the terminal modification of hyperbranched polyurethane group, which can make it suitable for different purposes. The nature of the epoxy group is relatively active, and it can cross-link with a variety of curing agents to form a thermosetting resin with excellent performance. Research has rarely reported

Method used

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  • Hyperbranched polyurethane containing epoxy groups as well as preparation method and application thereof
  • Hyperbranched polyurethane containing epoxy groups as well as preparation method and application thereof
  • Hyperbranched polyurethane containing epoxy groups as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation method of the hyperbranched polyurethane containing epoxy group of the present invention may further comprise the steps:

[0048] 1) Dissolve 4,4'-diphenylmethane diisocyanate and trimethylolpropane in tetrahydrofuran respectively to obtain a diisocyanate solution and a trihydric alcohol solution, wherein 4,4'-diphenyl The molar ratio of the isocyanate in methane diisocyanate to the hydroxyl group in trimethylolpropane in the trihydric alcohol solution is 1:1, and the mass concentration of the diisocyanate solution and the mass concentration of the trihydric alcohol solution are both 20%;

[0049] 2) Under a nitrogen atmosphere at 60°C, add the diisocyanate solution into the trihydric alcohol solution for reaction, wherein the reaction temperature is 60°C, and the reaction time is 24h;

[0050]3) In the detection step 2), after the reaction of the diisocyanate solution and the trihydric alcohol solution is completed, the content of the hydroxyl group in ...

Embodiment 2

[0055] The preparation method of the hyperbranched polyurethane containing epoxy group of the present invention may further comprise the steps:

[0056] 1) Dissolve 4,4'-diphenylmethane diisocyanate and trimethylolpropane in tetrahydrofuran respectively to obtain a diisocyanate solution and a trihydric alcohol solution, wherein 4,4'-diphenyl The molar ratio of the isocyanate in the methane diisocyanate and the hydroxyl group in the trimethylolpropane in the trihydric alcohol solution is 5:4, and the mass concentration of the diisocyanate solution and the mass concentration of the trihydric alcohol solution are 17%;

[0057] 2) Under a nitrogen atmosphere at 60°C, add the diisocyanate solution into the trihydric alcohol solution for reaction, wherein the reaction temperature is 60°C, and the reaction time is 24h;

[0058] 3) Detect the content of isocyanate in the reaction system after the reaction between diisocyanate solution and trihydric alcohol solution in step 2), and the...

Embodiment 3

[0063] The preparation method of the hyperbranched polyurethane containing epoxy group of the present invention may further comprise the steps:

[0064] 1) Dissolve hexamethylene diisocyanate and glycerol in N,N-dimethylacetamide respectively to obtain a diisocyanate solution and a trihydric alcohol solution, wherein the hexamethylene diisocyanate in the diisocyanate solution The molar ratio of the isocyanate and the hydroxyl group in glycerol in the trihydric alcohol solution is 1:2, and the mass concentration of the diisocyanate solution and the trihydric alcohol solution are both 30%;

[0065] 2) Under a nitrogen atmosphere at 80°C, add the diisocyanate solution into the trihydric alcohol solution for reaction, wherein the reaction temperature is 80°C, and the reaction time is 15 hours;

[0066] 3) After the reaction of the diisocyanate solution and the trihydric alcohol solution in the detection step 2) is completed, the content of the hydroxyl group in the reaction system...

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Abstract

The invention discloses hyperbranched polyurethane containing epoxy groups as well as a preparation method and application thereof. According to the invention, by controlling the mole ratio of diisocyanate and trihydric alcohol, a reaction medium, adding amount of a matter containing epoxy groups, reaction temperature and reaction time, the hyperbranched polyurethane with the weight-average molecular weight of 25,000-10,0000 and 8-40 epoxy groups is obtained. The prepared hyperbranched polyurethane containing epoxy groups is wide in raw material source, and commercialized; a polymerization method is mature and the preparation process is simple; the hyperbranched polyurethane containing epoxy groups is easy to store. In addition, the hyperbranched polyurethane containing epoxy groups can be used as an active modifier for a thermosetting resin prepolymer.

Description

technical field [0001] The invention belongs to the technical field of hyperbranched polymers, and relates to a hyperbranched polyurethane containing epoxy groups, a preparation method and application thereof. Background technique [0002] Due to its unique structure and excellent properties, such as three-dimensional spherical structure, low melt viscosity, good solubility and a large number of active end groups, hyperbranched polymers have become one of the research hotspots in the past 20 years. The molecular skeleton of polyurethane has a structure of soft and hard segments. As a widely used polymer material, its raw materials are easy to obtain and its comprehensive properties are excellent. Based on the excellent thermomechanical properties endowed by polyurethane structural units, combined with the low viscosity and good solubility of hyperbranched polymers, hyperbranched polyurethanes can be used as modifiers for thermosetting resin prepolymers such as epoxy resins a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/83C08G18/66C08G18/48C08G18/32
CPCC08G18/831C08G18/3206C08G18/4829C08G18/6677
Inventor 刘育红王一超吕游
Owner XI AN JIAOTONG UNIV
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