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Environment-friendly modified benzoxazine resin and preparation method thereof

A benzoxazine and environment-friendly technology, which is applied in the field of environment-friendly modified benzoxazine resin and its preparation, can solve the problem of low carbon residue rate of benzoxazine resin, low molecular regularity of resin, and uneven molecular weight distribution. Concentration and other issues to achieve the effect of improving heat resistance, improving resin thermal stability and mechanical properties, and good heat resistance

Active Publication Date: 2021-12-21
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Introduce phosphazene groups into the benzoxazine structure to develop different types of phosphazene-type benzoxazines. These phosphazene-type benzoxazines are superior to traditional benzoxazines in terms of flame retardancy and thermal stability. oxazine, but the molecular regularity of the prepared resin is not high, the molecular weight distribution is not concentrated, the molecular activity is large, the carbon residue rate of the cured benzoxazine resin is low, and the preparation method is unstable

Method used

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  • Environment-friendly modified benzoxazine resin and preparation method thereof

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Embodiment 1

[0032] In this embodiment, the present invention provides an environmentally friendly modified benzoxazine resin and a preparation method thereof. The present invention provides an environmentally friendly modified benzoxazine resin, which comprises: six 35 parts of chlorocyclotriphosphazene, 70 parts of paracetamol, 70 parts of 4-maleimidophenol and 90 parts of formaldehyde; calculated in parts by mass, the catalyst includes: 4 parts of potassium carbonate, 0.2 parts of sodium hydroxide ; The solvent is acetone, methanol, tetrahydrofuran.

[0033] Specifically include the following steps:

[0034] S1. Add solvent acetone, 35 parts of hexachlorocyclotriphosphazene and 70 parts of p-acetaminophen to the reaction kettle and stir to fully dissolve, then add 4 parts of catalyst potassium carbonate, heat for the first time, and the solution boils when the temperature rises to 60°C , carry out the first reflux reaction, the reflux reaction time is 24h, the reflux reaction is comple...

Embodiment 2

[0056] In this embodiment, the present invention provides an environmentally friendly modified benzoxazine resin and a preparation method thereof. The present invention provides an environmentally friendly modified benzoxazine resin, which comprises: six 25 parts of chlorocyclotriphosphazene, 60 parts of paracetamol, 75 parts of 4-maleimidophenol and 80 parts of formaldehyde; calculated by mass parts, the catalyst includes: 4 parts of potassium carbonate, 0.2 parts of sodium hydroxide ; The solvent is acetone, methanol, tetrahydrofuran.

[0057] Specifically include the following steps:

[0058] S1. Add solvent acetone, 25 parts of hexachlorocyclotriphosphazene and 60 parts of p-acetaminophen to the reaction kettle, stir and dissolve fully, then add 4 parts of catalyst potassium carbonate, heat for the first time, and the solution boils when the temperature rises to 57°C , carry out the first reflux reaction, the reflux reaction time is 28h, the reflux reaction is completed, ...

Embodiment 3

[0062] In this embodiment, the present invention provides an environmentally friendly modified benzoxazine resin and a preparation method thereof. The present invention provides an environmentally friendly modified benzoxazine resin, which comprises: six 40 parts of chlorocyclotriphosphazene, 75 parts of paracetamol, 80 parts of 4-maleimidophenol and 100 parts of formaldehyde; calculated in parts by mass, the catalyst includes: 4 parts of potassium carbonate, 0.2 part of sodium hydroxide ; The solvent is acetone, methanol, tetrahydrofuran.

[0063] Specifically include the following steps:

[0064] S1. Add solvent acetone, 40 parts of hexachlorocyclotriphosphazene and 75 parts of p-acetaminophen to the reaction kettle, stir and dissolve fully, then add 4 parts of catalyst potassium carbonate, heat for the first time, and the solution boils at 65°C , carry out the first reflux reaction, the reflux reaction time is 36h, the reflux reaction is completed, the first time the tempe...

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Abstract

The invention relates to the technical field of resin, in particular to environment-friendly modified benzoxazine resin and a preparation method thereof. The preparation method includes the steps that a solvent, phosphonitrilic chloride trimer, acetaminophenol and a catalyst are added, stirred, dissolved and heated to react to obtain a first solid intermediate product, the first solid intermediate product is added into the solvent, a catalyst is added, and a heating reaction is performed, a second solid intermediate product is obtained, the second solid intermediate product is added into the solvent, formaldehyde and 4-maleimidophenol are added, and the heating reaction is performed to obtain the environment-friendly modified benzoxazine resin. The invention further provides the environment-friendly modified benzoxazine resin. The environment-friendly modified benzoxazine resin is prepared from phosphonitrilic chloride trimer, acetaminophenol, 4-maleimido phenol, formaldehyde, the catalyst and the solvent. The obtained modified benzoxazine resin is regular in structure and low in molecular activity, and the cured resin is high in heat resistance, high in residual carbon rate, excellent in mechanical property and good in flame retardant effect.

Description

technical field [0001] The invention relates to the technical field of resins, in particular to an environment-friendly modified benzoxazine resin and a preparation method thereof. Background technique [0002] Polymeric flame retardants are used in a wide range of applications such as advanced composite matrices, copper clad laminates, coatings for printed circuit boards and barrier materials, semiconductor packaging and manufacturing. Additives containing halides in flame retardants can effectively show higher flame retardant potential, but they will release highly toxic gases and form potential carcinogens when burned. For example, some traditional flame retardants will migrate to the surface and evaporate, becoming Potential pollutants of the environment, which can have long-term effects on human health, are potentially problematic flame retardant polymers even if they are not burned. [0003] In order to meet the increasing demand for flame retardants and the developme...

Claims

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Application Information

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IPC IPC(8): C08G14/06
CPCC08G14/06
Inventor 田谋锋姚亚琳尹群皎贾晨辉刘红影
Owner 北京玻钢院复合材料有限公司
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