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Water-soluble hyperbranched epoxy resin and preparation method thereof

An epoxy resin, water-soluble technology, applied in the field of water-soluble hyperbranched epoxy resin and its preparation, can solve environmental pollution and other problems

Active Publication Date: 2012-01-18
ZHEJIANG RONGTAI TECH ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the existing epoxy resin in the production and processing process to produce organic solvent volatile gas (VOC), causing serious environmental pollution problems, to provide a kind of preparation method of water-soluble hyperbranched epoxy resin, Can prepare epoxy resin with good water solubility, excellent mechanical properties and electrical properties

Method used

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  • Water-soluble hyperbranched epoxy resin and preparation method thereof
  • Water-soluble hyperbranched epoxy resin and preparation method thereof
  • Water-soluble hyperbranched epoxy resin and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] Prepare according to the water-soluble hyperbranched epoxy resin of the present embodiment through the following steps successively:

[0042] (1) Synthesis of water-soluble hyperbranched polymer: Add 1mol pentaerythritol, 11mol 2,2-dimethylolpropionic acid, 0.05mol p-toluenesulfonic acid into a four-necked flask, slowly heat up to 160-180 degrees, and pump Vacuum, make the vacuum degree of four-neck flask below 100Pa, constant temperature reaction 5 hours, obtain water-soluble hyperbranched polymer melt;

[0043] (2) Functional modification of water-soluble hyperbranched polymer end group: put 1mol maleic anhydride, 0.06mol toluenesulfonic acid and the above-mentioned water-soluble hyperbranched polymer into a four-necked flask, warm to 160-180 degrees, and vacuumize at the same time , making the vacuum degree of the four-necked flask below 100Pa, and reacting at a constant temperature for 4 hours, the terminal hydroxyl groups of the hyperbranched polymer and maleic anh...

Embodiment 2

[0048] According to the water-soluble hyperbranched epoxy resin of the embodiment of the present embodiment, it is prepared through the following steps once:

[0049] (1), the synthesis of water-soluble hyperbranched polymer: 1mol pentaerythritol, 32mol hexahydrotrimellitic anhydride, 0.1mol cetyltrimethylammonium bromide are added in the four-necked flask, slowly warming up to 160-180 degrees, pumping Vacuum, make the vacuum degree of four-neck flask below 100Pa, constant temperature reaction 9 hours, obtain water-soluble hyperbranched polymer melt;

[0050] (2), water-soluble hyperbranched polymer terminal functional modification: 0.5mol succinic anhydride, 0.06mol cetyltrimethylammonium bromide and the above-mentioned water-soluble hyperbranched polymer are dropped into a four-necked flask, and warm To 120-180 degrees, vacuum at the same time, so that the vacuum degree of the four-necked flask is below 100Pa, constant temperature reaction for 6-8 hours, part of the terminal...

Embodiment 3

[0054] According to the water-soluble hyperbranched epoxy resin of the present embodiment, it is prepared through the following steps once:

[0055] (1), the synthesis of water-soluble hyperbranched polymer: 1mol glycerol, 20mol trimellitic anhydride, 0.08mol boron trifluoride etherate complex are added in the four-necked flask, slowly warming up to 170-180 degrees, while evacuating, Keep the vacuum degree of the four-necked flask below 100Pa, and react at a constant temperature for 6-9 hours to obtain a water-soluble hyperbranched polymer melt;

[0056] (2), water-soluble hyperbranched polymer terminal functional modification: put 0.8mol maleic anhydride, 0.06mol boron trifluoride etherate complex and the above-mentioned water-soluble hyperbranched polymer into a four-necked flask, warm to 160 -180 degrees, vacuum at the same time, so that the vacuum degree of the four-necked flask is below 100Pa, and react at a constant temperature for 6-8 hours. The terminal hydroxyl groups o...

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Abstract

The invention relates to a preparation method of water-soluble hyperbranched epoxy resin. The method comprises the following steps of: (1) making a polyol serving as a core react with an acid to generate a water-soluble hyperbranched polymer under an appropriate condition; (2) functionally modifying the terminal group of the water-soluble hyperbranched polymer to generate a part of terminal carboxyl group water-soluble hyperbranched polymers; (3) undergoing a ring opening addition reaction on the water-soluble hyperbranched polymer and epoxy chloropropane to generate an addition product; (4) undergoing a ring closing reaction on the addition product under the action of catalyst to generate an epoxy terminal group, and generating a sodium salt through the terminal carboxyl group simultaneously to obtain the water-soluble hyperbranched epoxy resin. The hyperbranched epoxy resin prepared with the method can be dissolved into water to form uniform dispersed system, and has flowing viscosity less than 10 Pa.S, high temperature resistance and high adhesive force.

Description

technical field [0001] The invention relates to a water-soluble hyperbranched epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resin has excellent mechanical properties, electrical properties and adhesive properties, as well as small shrinkage and good stability. Molecular materials are widely used in many fields, such as electronics, electricity, machinery manufacturing, chemical anticorrosion, aerospace, shipping and many other industrial fields. Waterborne epoxy resin refers to a stable dispersion system prepared by dispersing epoxy resin in the form of particles or droplets in a dispersion medium with water as the continuous phase. It does not contain volatile organic compound (VOC) solvents. It is an environmental Friendly green chemicals and materials are getting more and more attention. [0003] To make the epoxy resin itself water-soluble, it must contain enough strong hydrophilic groups such as hydroxyl groups, ether groups, carbox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/12C08G63/91
Inventor 曹万荣颜志勇狄宁宇徐黄忠符开斌
Owner ZHEJIANG RONGTAI TECH ENTERPRISE
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