Toughening type phenolic resin and preparation method thereof

A phenolic resin and toughening technology, which is applied in the field of toughened phenolic resin and its preparation, can solve the problems of unabated ablation resistance and debonding of the interface, so as to improve the ablation resistance, increase the interface area, The effect of improving compatibility

Active Publication Date: 2019-07-05
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention adopts fillers such as carboxyl-terminated nitrile rubber and zirconium diboride to synergistically modify the phenolic resin, and solves the problem of resin-based composite materials and metal cabins under the premise that the ablation resistance of the toughened phenolic resin is not reduced. Interface debonding problem after one-piece molding

Method used

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  • Toughening type phenolic resin and preparation method thereof
  • Toughening type phenolic resin and preparation method thereof

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preparation example Construction

[0036] The present invention provides the preparation method of the toughening type phenolic resin described in the first aspect of the present invention in the second aspect, described method comprises the steps:

[0037] (1) Disperse 0.3 to 0.8 parts (such as 0.3, 0.4, 0.5, 0.6, 0.7 or 0.8 parts) of dispersant in a solvent to obtain a dispersion;

[0038] (2) 100 parts of phenolic resin, 30 to 90 parts (such as 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85 or 90 parts) carboxyl-terminated nitrile rubber and 15 to 90 parts 45 parts (such as 15, 20, 25, 30, 35, 40 or 45 parts) of zirconium diboride are mixed uniformly to obtain a mixture;

[0039] (3) Divide (for example, equally divide) the mixture obtained in step (2) into multiple parts (two parts and more than two parts), and then add multiple parts of the mixture into the dispersion liquid obtained in step (1) and stir Disperse evenly to obtain toughened phenolic resin.

[0040] In particular, "parts" in the present in...

Embodiment 1

[0052] ① Weigh 1 kg of absolute ethanol in a container, add 2.5 g of dispersant in the absolute ethanol solvent and disperse and dissolve with ultrasonic waves to obtain a dispersion.

[0053] ② Weigh 500g of boron phenolic resin powder, 150g of carboxy-terminated nitrile rubber powder, and 75g of zirconium diboride powder in another container, and use a stirring paddle to stir and pre-mix for 0.5h to ensure uniform stirring to obtain a mixture; wherein, the The carboxyl-terminated nitrile rubber powder is selected from nano carboxyl-terminated nitrile rubber powder with an average particle diameter of 50-100 nm.

[0054] ③ Divide the well-mixed mixture into 4 parts, and add them to the dispersion liquid obtained in ① one by one, stir and ultrasonically disperse for 15 minutes each time, until finally all the mixture is added, and the resin composition is stirred evenly to obtain Toughened phenolic resin.

[0055] After the toughened phenolic resin in this example is cured, t...

Embodiment 2

[0057] ① Weigh 1 kg of absolute ethanol in a container, add 2.5 g of dispersant in the absolute ethanol solvent and disperse and dissolve with ultrasonic waves to obtain a dispersion.

[0058] ② Weigh 500g of boron phenolic resin powder, 250g of carboxyl-terminated nitrile rubber powder, and 125g of zirconium diboride powder in another container, and use a stirring paddle to stir and pre-mix for 0.5h to ensure uniform stirring to obtain a mixture; wherein, the The carboxyl-terminated nitrile rubber powder is selected from nano carboxyl-terminated nitrile rubber powder with an average particle diameter of 50-100 nm.

[0059]③ Divide the well-mixed mixture into 4 parts, and add them to the dispersion liquid obtained in ① one by one, stir and ultrasonically disperse for 15 minutes each time, until finally all the mixture is added, and the resin composition is stirred evenly to obtain Toughened phenolic resin.

[0060] After the toughened phenolic resin in this example is cured, ...

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Abstract

The invention relates to toughening phenolic resin and a preparation method thereof. The toughening phenolic resin is prepared from, by weight, 100 parts of phenolic resin, 30-90 parts of carboxyl-terminated butadiene-acrylonitrile rubber, 15-45 parts of zirconium diboride and 0.3-0.8 part of a dispersing agent. The preparation method comprises the steps that 0.3-0.8 part of dispersing agent is dispersed in the solvent, and a dispersion solution is obtained; 100 parts of phenolic resin, 30-90 parts of carboxyl-terminated butadiene-acrylonitrile rubber and 15-45 parts of zirconium diboride aremixed to be uniform, and a mixture is obtained; the obtained mixture is divided into multiple parts, and then the multiple parts of mixture are added in the dispersion solution in sequence and stirredand dispersed to be uniform, and the toughening phenolic resin is obtained. Accordingly, the carboxyl-terminated butadiene-acrylonitrile rubber, zirconium diboride and other fillers are adopted for modifying the phenolic resin, and on the premise that it is guaranteed that the anti-ablation property of the toughening phenolic resin is not reduced, the problem that interface debonding occurs aftera resin-based composition material and a metal cabin are integrally formed is solved.

Description

technical field [0001] The invention belongs to the technical field of polymer modification, in particular to a toughened phenolic resin and a preparation method thereof. Background technique [0002] With the development of aerospace technology, space has become the "commanding height" for safeguarding national security and interests, and various countries are paying more and more attention to the development of aircraft. The problem of heat protection is one of the most critical factors that determine the safety of the aircraft and the successful completion of various tasks, and ablation heat protection has always been popular for its simplicity and reliability, so it has always been the focus of space agencies and experts from various countries hot spot. [0003] The ablation material is a special material used on the outer surface of the missile head, the spacecraft re-entry cabin, and the inner surface of the rocket engine. It decomposes, melts, evaporates, sublimates ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08L13/00C08K3/38
CPCC08L61/14C08L2201/08C08L13/00C08K3/38
Inventor 谢永旺许孔力郝春功许学伟李峥
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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