Preparation method and use of resin mixture containing benzoxazine-maleic amide

A technology of resin mixture and maleamide, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems that are not suitable for the manufacture of general engineering composite materials and electrical insulation materials, the raw materials are not easy to obtain, and the cost Advanced problems, to achieve good commercial effect, good appearance quality and low cost

Active Publication Date: 2014-01-08
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The benzoxazine monomers and their resins of these two structures have some outstanding flexibility advantages. Because of the high cost and the difficulty in obtaining raw materials, they are not suitable for the manufacture of large quantities of general engineering composite materials and electrical insulation products.

Method used

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  • Preparation method and use of resin mixture containing benzoxazine-maleic amide
  • Preparation method and use of resin mixture containing benzoxazine-maleic amide
  • Preparation method and use of resin mixture containing benzoxazine-maleic amide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 180kg of amine compounds (aniline: ethylenediamine: 1,6 hexamethylenediamine = 4:2:1), 100kg of maleic anhydride and 420kg of toluene into reactor A, and quickly The temperature was raised to 95° C. for 2 hours to obtain an intermediate solution, which was lowered to room temperature for later use.

[0026] In reactor B, put all the intermediate solution in reactor A, after cooling down to 7℃~10℃, add 275kg of 40% formaldehyde solution, control the temperature not to exceed 20℃ for 1 hour, adjust pH=6~ 7. Add 180kg of phenol and 140kg of toluene, stir and react at a temperature of 90°C for 3.5 hours, separate into an organic phase and an aqueous phase after standing still, remove the water in the lower part of the reactor, remove the solvent by vacuum distillation, and dry to obtain Light brown-yellow solid benzene-horse resin mixture.

Embodiment 2

[0028] Put 190kg of amine compounds (aniline: ethylenediamine = 2:1), 110kg of maleic anhydride and 430kg of toluene into reactor A. Under stirring, rapidly raise the temperature to 70°C and react for 1.5 hours to obtain The intermediate solution was lowered to room temperature for later use.

[0029] In Reactor B, put all the intermediate solution in Reactor A, and then lower the temperature to 14°C~17°C, then add 290kg of 40% formaldehyde solution, control the temperature not to exceed 20°C for 1.5 hours, and adjust the pH=6 ~7, then add 190kg of phenolic compound (phenol: cresol = 2:5) and 145kg of toluene, stir and react at a temperature of 95°C for 4 hours, separate into an organic phase and an aqueous phase after standing, and remove the lower part of the reactor water, then vacuum distillation to remove the solvent, and drying to obtain a light brown solid benzene-horse resin mixture.

Embodiment 3

[0031] Put 180kg of amine compounds (aniline: ethylenediamine: 4,4'-diaminodiphenyl ether = 5:2:1), 90kg of maleic anhydride and 440kg of toluene into reactor A. Under stirring, the temperature was rapidly raised to 85° C. for 2 hours to obtain an intermediate solution, which was lowered to room temperature for later use.

[0032] In Reactor B, put all the intermediate solutions in Reactor A, and after cooling down to 18°C-20°C, add 260kg of 40% formaldehyde in paraformaldehyde aqueous solution, control the temperature not to exceed 20°C for 2 hours, adjust pH=6~7, then add 170kg of phenolic compound (phenol:cresol=1:2) and 140kg of toluene, stir and react at 95℃ for 4 hours, separate into organic phase and water phase after standing, remove The water in the lower part of the reactor was then vacuum distilled to remove the solvent and dried to obtain a light brown solid benzene-horse resin mixture.

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Abstract

The invention discloses a preparation method of a resin mixture containing benzoxazine-maleic amide, which is characterized by comprising the following steps: throwing an amine compound, maleic anhydride and a solvent into a reactor A, stirring and heating up to 70-95 DEG C, reacting for 1-2 h, and cooling to the room temperature to obtain an intermediate solution; throwing the intermediate solution into a reactor B, cooling and maintaining at 0-20 DEG C, adding a 40% formaldehyde aqueous solution, controlling the temperature within 20 DEG C, reacting for 1-2 h, regulating the pH to 6-7, adding a phenolic compound and a solvent, reacting at 70-100 DEG C for 2-5 h, standing to stratify into an organic phase and an aqueous phase, vacuum distilling the organic phase to remove the solvent, and drying the remaining substance to obtain the resin mixture containing benzoxazine-maleic amide. The resin mixture is good in performance and is suitable for manufacturing electrical insulating structural members, coating materials or structural composite materials.

Description

technical field [0001] The invention belongs to a mixture of polymer compounds, and relates to a preparation method and application of a benzoxazine-maleamide resin mixture. The benzoxazine-maleamide resin mixture prepared by the invention is suitable for electrical insulation Manufacture of structural parts, cladding materials or structural composites. Background technique [0002] In the prior art, extensive research work has been carried out on the synthesis of benzoxazine resins, ring-opening polymerization, and the relationship between structure and performance, and hundreds of domestic and foreign patent applications for the synthesis of benzoxazine resins have been carried out. . The outstanding feature of benzoxazine resin is the ring-opening polymerization reaction of benzoxazine ring, which reduces the production of small molecules (mainly water molecules), which is beneficial to the production of industrial high-performance composite products. After years of res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08L79/04B32B27/04
Inventor 李建学唐安斌黄湖驰李先德
Owner SICHUAN DONGFANG INSULATING MATERIAL
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