Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of hot-melt benzoxazine composition capable of being cured at medium temperature

A technology of benzoxazine and composition, which is applied in the field of hot-melt prepreg manufacturing for structural composite materials, can solve the problems of lack of preparation and performance research of glass fiber/carbon fiber hot-melt prepreg composite materials, and achieve flow Controllable properties, good spreading and good storage stability

Active Publication Date: 2021-01-12
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many basic researches on the synthesis and toughening modification of benzoxazine in China, but there is a lack of research on the preparation and performance of glass fiber / carbon fiber hot melt prepreg composite materials. Prepregs with comparable performance to similar foreign materials The product has not been reported

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of hot-melt benzoxazine composition capable of being cured at medium temperature
  • Preparation method of hot-melt benzoxazine composition capable of being cured at medium temperature
  • Preparation method of hot-melt benzoxazine composition capable of being cured at medium temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Step I: Heat 100 parts of the benzoxazine 6170 monomer to 100°C to melt, keep it warm for 30 minutes, add 10 parts of resorcinol and stir until it melts uniformly, and obtain component A; Step II: heat the thermoplastic resin benzene Add 30 parts of epoxy resin PKHH to 30 parts of glycidyl ester cycloaliphatic epoxy resin CY-179, heat to 170°C, and mechanically stir for 120 minutes until it dissolves completely to obtain component B; Step III: Mix the component in (1) Part A and component B in (2) were blended at 100°C for 20 minutes, and 10 parts of smoke suppressant XSEP-7 was added and stirred for 20 minutes to obtain a modified hot-melt benzoxazine resin composition that could be cured at medium temperature; IV The above-mentioned modified hot-melt benzoxazine resin was used to prepare the hot-melt adhesive film and impregnated with T700S-12K carbon fiber to obtain T700 / modified hot-melt benzoxazine resin carbon fiber unidirectional belt hot-melt prepreg, control Th...

Embodiment 2

[0046] Step I: Blend 50 parts of the benzoxazine 6170 monomer and 50 parts of the benzoxazine 3170 monomer and heat to 100°C to melt, keep the temperature for 20 minutes, add 10 parts of bis(4-hydroxybenzene)sulfur and stir until Melt in a uniform state to obtain component A; Step II: Add 10 parts of thermoplastic resin polyetherethersulfone to 20 parts of glycidyl ether epoxy resin NPEF-170, heat to 120°C, and mechanically stir for 60 minutes until completely dissolved to obtain component Part B; Step III: Blend component A in (1) and component B in (2) at 90°C for 30 minutes, add 20 parts of smoke suppressant XSEP-7 and continue stirring for 20 minutes to obtain a medium-temperature curable Modified hot-melt benzoxazine resin composition; Ⅳ Using the above-mentioned modified hot-melt benzoxazine resin to prepare a hot-melt adhesive film and impregnating and compounding with T800H-12K carbon fiber to obtain T800 / modified hot-melt benzoxazine Oxygen resin carbon fiber unidirec...

Embodiment 3

[0049] Step I: Blend 80 parts of the benzoxazine 6170 monomer and 20 parts of the benzoxazine 3170 monomer and heat to 100°C to melt, keep the temperature for 60 minutes, add 10 parts of resorcinol and 5 parts of bis(4- Stir hydroxybenzene)sulfur until it melts uniformly to obtain component A; Step II: add 20 parts of thermoplastic resin polyether ether sulfone to 40 parts of glycidylamine epoxy resin S-510, heat to 120°C, and mechanically stir 120min until complete dissolution to obtain component B; step III: Blend component A in (1) and component B in (2) at 90°C for 30min, add 25 parts of smoke suppressant XSEP-7 and continue stirring 20min, obtain the modified hot-melt benzoxazine resin composition that can be solidified at medium temperature; Modified hot-melt benzoxazine resin carbon fiber unidirectional tape hot-melt prepreg, the resin content is controlled at 34%.

[0050] The T800 / modified benzoxazine hot-melt prepreg prepared above was pressure-cured and molded in a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A preparation method of the hot-melt benzoxazine composition capable of being cured at the medium temperature comprises the following steps: S1, heating a benzoxazine monomer to 90-100 DEG C for melting, preserving heat for 20-60 minutes, adding a catalyst, and stirring until the benzoxazine monomer is in a uniform melting state, so as to obtain a component A; s2, adding a thermoplastic resin toughening agent into a process modifier, heating to 120-170 DEG C, and mechanically stirring for 60-120 minutes until the thermoplastic resin toughening agent is completely dissolved to obtain a component B; s3, blending the component A in the step S1 and the component B in the step S2 at 90-100 DEG C for 10-30 minutes, adding a smoke suppressant, and continuously stirring for 10-30 minutes to obtaina modified hot-melt benzoxazine resin composition capable of being cured at medium temperature; and s4, preparing a hot melt adhesive film from the modified benzoxazine resin, and carrying out impregnation compounding on the hot melt adhesive film and fibers or fabrics to obtain a hot melt prepreg, wherein the percentage content of the resin of the hot-melt prepreg containing the modified benzoxazine resin is 30%-50%.

Description

technical field [0001] The invention belongs to the technical field of manufacturing hot-melt prepregs for structural composite materials, and in particular relates to the composition and preparation method of a hot-melt benzoxazine resin system solidified at a medium temperature and a hot-melt prepreg containing the benzoxazine system. Background technique [0002] In order to achieve structural weight reduction and improve operating economy, lightweight advanced composite materials have become the preferred material system for the manufacture of modern transportation tools such as aircraft, ships and high-speed trains [1-3]. With the application and popularization of resin-based composite materials in the above-mentioned fields, higher and higher requirements are put forward for the flame-retardant properties of materials. It is an effective way to improve the flame retardancy of thermosetting resins by using chlorine-containing or bromine-containing diphenols or dibasic a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08J5/24C08L61/34C08L71/12C08L63/00C08L81/06C08K7/06C08K7/14C08G14/06
CPCC08J5/24C08G14/06C08J2361/34C08J2471/12C08J2463/00C08J2481/06C08K7/06C08K7/14
Inventor 樊孟金尚呈元凌辉周宇蒋文革徐晓明
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH