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Aromatic tetracarboxylic acid compound

A technology of aromatic tetracarboxylic acid and compound, applied in the field of new aromatic tetracarboxylic acid compound, can solve the problems of volatilization, production line pollution, high vapor pressure, etc., achieve excellent flame retardancy, reduce volatilization, and inhibit pollution

Pending Publication Date: 2021-05-11
HONSHU CHEM INDAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a curing agent for epoxy resins, saturated hydrocarbon anhydrides such as methyl hexahydrophthalic anhydride and methyltetrahydrophthalic anhydride are widely used because of their excellent light resistance. The vapor pressure of the curing agent is high, so some volatilization occurs during the curing reaction. If thermal curing is performed in an open system, the curing agent will volatilize into the atmosphere, which will not only cause adverse effects on the operator, but also cause problems such as pollution of the production line.

Method used

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  • Aromatic tetracarboxylic acid compound
  • Aromatic tetracarboxylic acid compound
  • Aromatic tetracarboxylic acid compound

Examples

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Embodiment 1

[0043] (Synthesis of aromatic tetracarboxylic acid compound "compound A")

[0044] Add 4,4'-bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-ylcarbonyloxy) to a 500 mL capacity four-necked flask equipped with a stirrer, a thermometer, and a cooling tube - 50.7g of 2,2',3,3',5,5'-hexamethylbiphenyl, 152.1g of tetrahydrofuran containing BHT, 152.1g of water, 0.507g of 85% phosphoric acid, heated to 40°C, and then reacted for 25 hours while maintaining 40°C. Further, the temperature was raised to 50° C., and the reaction was carried out for 4 hours. Then 85 g of water was dripped. During the dropping, a solid precipitated out at room temperature. The precipitated solid was filtered and dried to obtain 48.9 g of a white to beige solid with a purity of 96.8% (GPC measurement data analysis) (yield 91.4 mol%).

[0045] Depend on 1 H-NMR, 13 As a result of C-NMR analysis, it was confirmed that the obtained solid was "Compound A" having the above chemical structure.

[0046] 1 H-NMR (...

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Abstract

The present invention addresses the problem of providing a novel compound which suppresses volatilization of a curing agent during a curing reaction, thereby enabling the achievement of a curing agent that has excellent characteristics such as heat resistance. The present invention provides, as a solution, an aromatic tetracarboxylic acid compound which is represented by formula (I). (In the formula, each R independently represents an alkyl group having 1-4 carbon atoms or an alkoxy group having 1-4 carbon atoms; and each n independently represents 0 or an integer of 1-4.

Description

technical field [0001] The present invention relates to a novel aromatic tetracarboxylic acid compound. Background technique [0002] Carboxylic acid compounds are compounds that are widely used in the fields of organic chemistry and polymer chemistry, and are useful in various fields such as fine chemistry, medical and agricultural chemical raw materials, resin and plastic raw materials, electronic information materials, and optical materials. group. Among them, polycarboxylic acids and their anhydrides are excellent in various properties such as heat resistance, good mechanical properties, electrical properties, and chemical resistance. In addition, the formation and reactivity of condensates are also good, so they are used as Monomers for polymer materials, compounds useful as raw materials for polyimide, polyester resin modifiers, and epoxy resin curing agents, for example. [0003] As a curing agent for epoxy resins, saturated hydrocarbon anhydrides such as methyl hex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/773C08G59/42
CPCC08G59/40C08G59/42C07C69/76C07C63/331C08G59/4223C07C69/80
Inventor 藤冈利恵西原匡彦
Owner HONSHU CHEM INDAL