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2-oxazolinyl-benzo oxazinyl compound and its composition and preparing method

A technology of benzoxazine and oxazoline, which is applied in the field of 2-oxazoline-benzoxazine compounds and their compositions and preparations, can solve the problem of 2-oxazoline-benzoxazine which has not been seen yet. To solve the problems such as the report of intermediates, to achieve the effect of improving flame retardancy

Inactive Publication Date: 2007-04-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on previous information, we have not seen any reports about 2-oxazoline-benzoxazine intermediates

Method used

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  • 2-oxazolinyl-benzo oxazinyl compound and its composition and preparing method
  • 2-oxazolinyl-benzo oxazinyl compound and its composition and preparing method
  • 2-oxazolinyl-benzo oxazinyl compound and its composition and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Adopt the method of solution, take triazine as reaction raw material, prepare p-(2-oxazoline)-3-phenyl-3,4-dihydro-2H-1,3-benzoxazine, abbreviated as POB, Its structure is as follows:

[0031]

[0032] Dissolve 2-(p-hydroxyphenyl)-2-oxazoline in DMF at room temperature, and add 1,3,5-triphenyl-hexahydro-1,3 in a molar ratio of 3:1:3, 5-Triazine and paraformaldehyde. After stirring evenly, the temperature was raised to 90°C. After reacting for 2 hours, part of DMF was distilled off under reduced pressure, cooled and left standing to obtain a light yellow translucent viscous body. Add an appropriate amount of deionized water to the obtained product at room temperature, add an appropriate amount of ether after stirring, and let it stand after stirring evenly. After stabilization, take out the light yellow transparent solution in the upper layer. After washing with alkali and water, distill out the ether under reduced pressure, and the obtained The product was dried in...

Embodiment 2

[0035] Prepare p-(2-oxazoline)-3-allyl-3,4-dihydro-2H-1,3-benzoxazine by solution method, abbreviated as POAB, its structure is as follows:

[0036]

[0037] 2-(p-Hydroxyphenyl)-2-oxazoline was dissolved in DMF at room temperature, and allylamine and paraformaldehyde were added sequentially at a molar ratio of 1:1:2. After stirring evenly, the temperature was raised to 90°C. After reacting for 2 hours, part of DMF was distilled off under reduced pressure, cooled and left standing to obtain a light yellow translucent viscous body. Add an appropriate amount of deionized water to the obtained product at room temperature, add an appropriate amount of ether after stirring, and let it stand after stirring evenly. After stabilization, take out the light yellow transparent solution in the upper layer. After washing with alkali and water, distill out the ether under reduced pressure, and the obtained The product was dried in a vacuum oven at 45°C for 24 hours under vacuum to obtain ...

Embodiment 3

[0039] Prepare p-(2-oxazoline)-3-furyl-3,4-dihydro-2H-1,3-benzoxazine by solution method, abbreviated as POFB, its structure is as follows:

[0040]

[0041] The method is the same as in Example 2, except that allylamine is replaced by furylamine, and finally a light yellow viscous body is obtained with a yield of 69.7%.

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Abstract

The present invention relates to one kind of benzo oxazine intermediate containing 2-oxazolinyl radical and its composition and their preparation process. The intermediate, 2-oxazolinyl- benzo oxazine, is prepared with 2-(p-hydroxy phenyl)-2-oxazoline, primary amine and formaldehyde or paraformaldehyde. The composition is prepared with 2-oxazolinyl- benzo oxazine, and thermosetting resin monomer or filler and through mechanical mixing or in-situ polymerization. The intermediate and its composition has excellent comprehensive performance.

Description

technical field [0001] The present invention relates to a class of novel benzoxazine intermediates containing 2-oxazoline groups and compositions and preparation methods thereof, more specifically, the present invention relates to 2-(p-hydroxyphenyl)-2-oxazines 2-oxazoline-benzoxazine intermediates prepared from oxazoline, primary amine, formaldehyde or paraformaldehyde, and the use of such benzoxazine intermediates with other thermosetting resins and / or fillers by mixing or in-situ Compositions prepared by polymerization, and methods for their preparation. Background technique [0002] Polybenzoxazine resin is a benzoxazine intermediate obtained through the ring-forming reaction of primary amines, phenols and aldehydes on the basis of the traditional method for preparing phenolic resins. , Benzoxazine ring-opening polymerization to generate ring-opening phenolic resin, which is a new type of thermosetting resin with nitrogen-containing network structure similar to phenolic...

Claims

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Application Information

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IPC IPC(8): C07D413/04C07D413/14C08L63/00C08L67/06C08L61/06C08L75/04C08L79/08C08K5/35C07D265/00C07D263/00
Inventor 余鼎声徐日炜曹宏伟
Owner BEIJING UNIV OF CHEM TECH
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