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High-residual-carbon thermosetting boron-containing phenolic resin as well as preparation method and application thereof

A boron phenolic resin and thermosetting technology, which is applied in the field of high carbon residue thermosetting boron phenolic resin and its preparation, can solve the problems of difficult application, difficult removal, and low ionization potential of sodium atoms, and achieve excellent flame retardancy, improved moisture resistance, The effect of excellent electrical performance

Active Publication Date: 2014-08-06
SHAANXI TAIHANG IMPEDEFIRE POLYMER LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the use of base catalysts such as , the final phenolic resin product is difficult to remove this At most, add some acidic substances to neutralize, and become sodium salt in the resin, which will bring many problems, such as: sodium atom ionization potential is low, easy to generate tail flow, and communication is interrupted; at the same time, the oxidation resistance of the material is reduced
Therefore, this type of phenolic resin is difficult to apply in the aerospace field

Method used

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  • High-residual-carbon thermosetting boron-containing phenolic resin as well as preparation method and application thereof
  • High-residual-carbon thermosetting boron-containing phenolic resin as well as preparation method and application thereof
  • High-residual-carbon thermosetting boron-containing phenolic resin as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0030] Esterification stage: add boric acid (chemically pure) and phenol (industrial pure) with a molar ratio of 1:3, namely 123.6g and 564g, into a 1000ml three-necked flask, put the three-necked flask into the oil bath, and then put the oil bath On a temperature-adjustable electric furnace, the three-neck flask is connected to a condenser for dehydration and condensation, and the condensate is collected at the lower port; the temperature is raised to 120°C within 3 hours to synthesize triphenyl borate; when the dehydration amount reaches 85g, stop heating.

[0031] Step 2: cooling stage: cooling the triphenyl borate obtained in step 1, and lowering its temperature to 60°C;

[0032] Step 3: Synthesis of high-carbon residual thermosetting boron phenolic resin stage: replace the synthesis device with a reflux device, when the triphenyl borate is cooled to 60°C, add paraformaldehyde, and open the reflux cooling water. The molar ratio is 1.1, and then the temperature rises. When ...

Embodiment 2

[0035] Esterification stage: Add boric acid and phenol with a molar ratio of 1:3, namely 123.6g and 564g, into a 1000ml three-necked flask, put the three-necked flask into an oil bath, and place the oil bath on an adjustable temperature electric stove. The three-necked flask was connected to a condenser, and the temperature was raised to 140° C. within 3.5 hours to synthesize triphenyl borate. Stop heating when the condensed water reaches 75g. Cooling stage: cooling the triphenyl borate obtained in step 1 to lower its temperature to 60°C;

[0036] The stage of synthesizing high carbon residue thermosetting boron phenolic resin: change the synthesis device into a reflux device, when the triphenyl borate is cooled to 60°C, add paraformaldehyde, the molar ratio of paraformaldehyde to phenol is 1.3, and then heat up , to generate boron phenolic resin; when the temperature rises to 95°C, the phenomenon of automatic heating occurs, at this time, stop accelerating or reduce the heat...

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Abstract

The invention relate to high-residual-carbon thermosetting boron-containing phenolic resin as well as a preparation method and application thereof. In the prior art, The reaction condition of thermosetting phenolic resin needs base catalysis, NaOH is difficult to remove from the final phenolic resin product and can be neutralized with some acidic substances at most to become sodium salt existing in resin; therefore, a sodium atomic ionization potential is low and wake flow can be generated easily to interrupt communication; meanwhile, the oxidation resistance of the material is reduced. The preparation method of the high-residual-carbon thermosetting boron-containing phenolic resin comprises an esterification phase, a cooling phase, a low-molecular-weight phenolic resin synthesis phase and an evacuation phase. The high-residual-carbon thermosetting boron-containing phenolic resin can be used for manufacturing various composite materials, functional coatings and special adhesives which are resistant to high temperature, resistant to ablation, and clean and flame-retardant, also can be used as a multifunctional curing agent for epoxy resin for improving the heat resistance, flame retardance and ablation resistance of epoxy resin simultaneously, and can be used as a multifunctional modifying agent for other resins and rubbers.

Description

technical field [0001] The invention relates to the technical field of boron phenolic resin preparation, in particular to a high carbon residue thermosetting boron phenolic resin and its preparation method and application. Background technique [0002] Phenolic resin has high heat resistance and excellent flame retardancy, but from the early 1980s to the mid-1990s, the research on phenolic resin entered a trough, and there were very few reports, while many heat-resistant thermoplastic polymers such as polyphenylene ether, Polysulfone, etc. have been successfully researched and reported like mushrooms after rain. In the late 1980s, people found that phenolic resin has unique advantages in terms of raw material price and flame retardancy from many polymers; on the other hand, from In many major fire accidents that actually occurred, certain lessons have also been drawn. The people-oriented social concept was put forward, so the research of higher performance phenolic resin...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08L61/14
Inventor 张多太张曦
Owner SHAANXI TAIHANG IMPEDEFIRE POLYMER LIMITED
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