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Preparation method of novel quinone amine curing agent and application to normal temperature epoxy curing system

A technology of curing agent and quinone amine, which is applied in the preparation of new quinone amine curing agent and in the application field of epoxy curing system at room temperature, and can solve the problem of high price of polyether amine or isophorone diamine and the synthesis process of quinone amine Complicated, difficult to use and other problems, to achieve the effect of excellent mechanical properties

Inactive Publication Date: 2010-07-14
GUANGZHOU CHEM GROUTING CO LTD CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the price of polyetheramine or isophorone diamine used in these quinoneamine epoxy curing agents is relatively high, and the synthesis process of silicon-containing quinoneamine is complicated and the cost is higher. Generally, heating is required to fully cure. Oxygen grouting, building structural adhesives and anti-corrosion coatings are difficult to be practical in many fields that require normal temperature curing epoxy

Method used

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  • Preparation method of novel quinone amine curing agent and application to normal temperature epoxy curing system
  • Preparation method of novel quinone amine curing agent and application to normal temperature epoxy curing system
  • Preparation method of novel quinone amine curing agent and application to normal temperature epoxy curing system

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1. Imination of amines

[0031] Add 60 grams of ethylenediamine, 0.3 grams of 723 cation exchange resin, and 73.1 grams of DMF solution into a three-necked flask equipped with a stirrer and a condenser, add 50 milliliters of cyclohexane solution, and reflux at a temperature of 80 ° C to separate water. When the quality of the dewatered water is very close to the theoretical value of 18 grams, the temperature of the reaction system is increased to 130-140 °C, and the cyclohexane solution and the DMF solution that has not participated in the reaction in the system are removed by distillation under reduced pressure, and the product is stored in Dry inside the brown bottle.

[0032] 2. Preparation of quinone amine curing agent

[0033] 15.2 grams of the above product were added to a dry constant pressure funnel, 10.8 grams of benzoquinone was dissolved in the tetrahydrofuran solution, and the contents in the funnel were slowly added dropwise to the tetrahydrofuran solution...

Embodiment 2

[0036] 1. Imination of amines

[0037] Add 79.1 grams of trimethylhexamethylenediamine, 52.6 grams of methyl isobutyl ketone, 0.3 grams of 723 cation exchange resin and 50 milliliters of benzene solution in the there-necked flask equipped with agitator, water separator, and condensing tube. Reflux at 80°C to separate water. When the quality of the separated water is very close to the theoretical value of 9 grams, the temperature of the reaction system is increased to 115-125° C., the ketone and the system solvent benzene that do not participate in the reaction are evaporated, and the product is stored in a dry brown bottle.

[0038] 2. Preparation of quinone amine curing agent

[0039] 15.6 grams of the above product were added to a dry constant pressure funnel, 5.4 grams of benzoquinone was dissolved in the THF solution, and the contents of the funnel were slowly added dropwise to the THF solution of benzoquinone while stirring. After the dropwise addition, 2 g of calcium h...

Embodiment 3

[0042] 1. Imination of amines

[0043] Add 30 grams of ethylenediamine, 43.9 grams of DMF and 0.3 grams of 723 cation exchange resin into a clean and dry 500ml three-necked flask equipped with a stirring device, a condenser, and a water separator, and then add 50 milliliters of cyclohexane. Remove the generated water azeotropically, measure the amount of distilled water to control the reaction process, raise the temperature of the system to 115-125°C when the amount of water collected is close to 9 grams, and remove unreacted DMF and toluene by distillation under reduced pressure to obtain one end A ketimine-modified polyamine AP whose group is a tertiary amino group.

[0044] 2. Preparation of quinone amine curing agent

[0045] 24.6 grams of the above product were added into a dry constant pressure funnel, 10.8 grams of benzoquinone was dissolved in the THF solution, and the contents of the funnel were slowly added dropwise to the THF solution of benzoquinone while stirring...

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Abstract

The invention relates to a preparation method of a novel quinone amine curing agent. One primary amine or secondary amine is left in molecules through imidization reaction between primary amine and carbonyl compounds in amine molecules, and then, products react with benzoquinone to obtain the latent type liquid quinone amine curing agent. The curing agent has good compatibility with epoxide resin, has good appetency with metal and alloy, and can be used for curing the epoxide resin at the room temperature through expelling oil and moisture from the moist or rusted metal surfaces, and cured objects have good mechanical property, folding resistance performance, high-temperature resistance performance and corrosion prevention performance, so the curing agent can be perfectly applied to surface corrosion prevention paint of metal or concrete and the like, and can also be used in epoxide construction structural glue or epoxide grouting materials of moist surfaces or even underwater reinforcing engineering.

Description

technical field [0001] The invention relates to a preparation method of a quinoneamine curing agent capable of curing epoxy at normal temperature. The curing agent can not only be well applied to surface anticorrosion coatings such as metal or concrete, but also can be used for reinforcement on wet surfaces or even underwater Epoxy building structural adhesives or epoxy grouting materials in engineering. technical background [0002] Quinone amine polymer (PAQ) is a kind of polymer containing "2,5-diamino-1,4-benzoquinone" functional group in the polymer chain. Quinoneamine polymers are usually prepared by the reaction of amines and quinones. Although as early as 1918, Suida pointed out that the reaction of amines and quinones can generate polymer substances; but in recent years, various properties of PAQ have been discovered, which has caused extensive research. For example, it has a strong affinity for metals and alloys, and can repel water and lubricating oil from wet a...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L63/02C08K13/02C08G59/50C09D7/12C09D5/08C09J11/06C09J163/00C09K3/10C07C257/12C07C251/08C07C249/02
Inventor 王永珍张亚峰邝健政高南徐宇亮
Owner GUANGZHOU CHEM GROUTING CO LTD CAS
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