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Benzoxazine-containing curable resin composition and preparation method thereof

A benzoxazine and curing resin technology, applied in the field of composite materials, can solve the problems of low crosslinking density, high brittleness of the cured product, and high curing temperature, and achieve the effects of high toughness mechanical properties, excellent mechanical properties, and lowering curing temperature.

Inactive Publication Date: 2021-01-19
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While benzoxazine resin has many advantages, it also has some disadvantages, such as high curing temperature, high polymer brittleness, poor toughness, etc.
Due to the characteristics of its molecular structure, benzoxazine resin has a low crosslinking density, which shows that the cured product is brittle, has low impact strength, and is easy to crack. Its thermal curing reaction ring-opening reaction temperature is high, and the curing reaction time is long. The narrow window makes the molding process control more difficult

Method used

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  • Benzoxazine-containing curable resin composition and preparation method thereof
  • Benzoxazine-containing curable resin composition and preparation method thereof
  • Benzoxazine-containing curable resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 50 parts of dihydric phenol type benzoxazine resin Ba-BOZ, 40 parts of bisphenol A type epoxy resin E51, and 10 parts of amino-terminated nitrile rubber (ATBN) in acetone, and prepare a concentration of 50% Solution, after the solution is stirred evenly, use T700 carbon fiber unidirectional fabric to prepare prepreg, and test the volatile content and resin content of the prepared prepreg. The volatile content of the prepreg is 1.5%, and the resin content is 35.2%.

[0033] Carbon fiber reinforced benzoxazine resin-based composite laminates were prepared by autoclave molding process, cured at 160°C for 10 hours, and then cooled to room temperature. The prepared composites were cut into standard samples according to regulations, and tested in the universal material test The compressive strength and interlaminar shear strength of the composite materials were tested on the machine, and the performance data are shown in Table 1.

Embodiment 2

[0035] Dissolve 50 parts of dihydric phenol type benzoxazine resin Ba-BOZ, 10 parts of bisphenol A type epoxy resin E51, and 40 parts of amino-terminated nitrile rubber (ATBN) in acetone to prepare a concentration of 50%. Solution, after the solution is stirred evenly, use T700 carbon fiber unidirectional fabric to prepare prepreg, and test the volatile content and resin content of the prepared prepreg. The volatile content of the prepreg is 1.4%, and the resin content is 34.8%.

[0036] Carbon fiber reinforced benzoxazine resin-based composite laminates were prepared by autoclave molding process, cured at 160°C for 10 hours, and then cooled to room temperature. The prepared composites were cut into standard samples according to regulations, and tested in the universal material test The compressive strength and interlaminar shear strength of the composite materials were tested on the machine, and the performance data are shown in Table 1.

Embodiment 3

[0038] Dissolve 50 parts of dihydric phenol type benzoxazine resin Ba-BOZ, 20 parts of bisphenol A type epoxy resin E51, 20 parts of carboxyl-terminated nitrile rubber (CTBN) and 10 parts of flame retardant in acetone to prepare A solution with a concentration of 50%. After the solution is stirred evenly, a prepreg is prepared using a T700 grade carbon fiber unidirectional fabric. The volatile matter and resin content of the prepared prepreg are tested. The volatile matter of the prepreg is 1.5%, and the resin content is 35.1%.

[0039] Carbon fiber reinforced benzoxazine resin-based composite laminates were prepared by autoclave molding process, cured at 160°C for 10 hours, and then cooled to room temperature. The prepared composites were cut into standard samples according to regulations, and tested in the universal material test The compressive strength and interlaminar shear strength of the composite materials were tested on the machine, and the performance data are shown ...

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Abstract

The invention provides a benzoxazine-containing curable resin composition and a preparation method thereof. The resin system comprises a benzoxazine monomer, an epoxy resin and a toughening agent, wherein the benzoxazine monomer is a bifunctional benzoxazine compound comprising at least one of dihydric phenol type benzoxazine and diamine type benzoxazine. The resin system comprises the componentsin parts by mass: 50-80 parts of the benzoxazine monomer, 10-40 parts of the epoxy resin, and 10-40 parts of the toughening agent. The resin system disclosed by the invention has the advantages of good manufacturability, high toughness and excellent comprehensive mechanical properties, and the prepared composite material has good compression and shearing properties when the benzoxazine resin composition disclosed by the invention is used as matrix resin of the composite material.

Description

technical field [0001] The invention relates to a curable resin composition containing benzoxazine and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Due to the advantages of light weight, high specific strength and designable performance, resin-based composite materials are continuously expanding in the fields of aerospace, ship transportation and electronic information. With the continuous development of equipment technology, the performance requirements are becoming more and more come higher. Especially in aviation, shipping, transportation and other fields, due to the high demand for equipment safety protection, high requirements are also put forward for the flame retardancy of materials. Therefore, in addition to meeting the requirements of lightweight and structural load-bearing Combustibility performance also puts forward a very urgent demand. [0003] Traditional epoxy resin has good structural m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/34C08L63/00C08L9/02C08L13/00C08J5/24C08K7/06
CPCC08L61/34C08J5/24C08J2361/34C08J2463/00C08J2409/02C08J2413/00C08K7/06C08L2205/03
Inventor 尹先鹏李丽英柯红军汪东王国勇赵英民张昊
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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