Pultrusion method of high-viscosity epoxy resin composition for carbon fibers

A technology of epoxy resin and pyridine-based epoxy resin, which is applied in the field of pultrusion molding of high-viscosity epoxy resin composition for carbon fiber, can solve problems affecting the compounding of resin and fiber interface, easy powder and peeling of products, and pulling Problems such as strong adhesion of extrusion die to achieve the effect of promoting adhesion and curing speed, increasing brittleness and increasing internal stress

Pending Publication Date: 2022-01-14
广东华彩复合材料有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The epoxy resin used in the current pultrusion molding process generally has the disadvantages of high viscosity at room temperature, uncontrollable gel time, strong adhesion with the pultrusion die, and low curing shrinkage, which will cause the products of the pultrusion molding process to easily drop powder. And peeling, serious problems such as mold blocking will occur; at the same time, other epoxy resin systems will add excessive inorganic fillers, which seriously affects the interface compounding between resin and fiber, resulting in low performance of composite materials

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
  • Pultrusion method of high-viscosity epoxy resin composition for carbon fibers
  • Pultrusion method of high-viscosity epoxy resin composition for carbon fibers
  • Pultrusion method of high-viscosity epoxy resin composition for carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A high-adhesive epoxy composition of carbon fiber, according to weight, including the following raw materials: bisphenol A epoxy resin, 10 parts of pyridyl epoxy resin, 40 polysiloxane polyether diols, 5 nano-filled materials, 10 under short cutting fibers, 60 active diluents, 90 anhydride curing agents;

[0031] The bisphenol A epoxy resin has 260 g / eq epoxy equivalent, a viscosity of 7500 cps, and a hydrolyzate content of less than 0.002%.

[0032] The pyridyl epoxy resin is a bipyridyl epoxy resin having a structural formula (I);

[0033] Where r is C 4 Straight alkanes -ch 2 CH 2 CH 2 CH 2 -;

[0034] The polysiloxane polyether diol has a weight average molecular weight of 2200, with the following structural formula (III),

[0035]

[0036] Among them, N and N 1 The ratio is 1: 5;

[0037] The nano-filler is calcium carbonate, a particle diameter of 300 nm; the nanofiller is surfacely modified by an amino silicone coupling agent, a surface graft amino group of nan...

Embodiment 2

[0043] A high-adhesive epoxy resin composition for carbon fibers, according to weight, including the following raw materials: 100 parts of the bisphenol A epoxy resin, 15 parts of the pyridine epoxy resin, 30 polysiloxane polyether glycol, 3 parts of nano-filler, 10 short cuts, 40 active diluents, 80 anhydride curing agents;

[0044] The bisphenol A-type epoxy resin has 240 g / eq epoxy equivalent, viscosity of 6800 cps, and hydrolyzed chlorine content is less than 0.002%;

[0045] The pyridyl epoxy resin is a tripipyridyl epoxy resin having structural formula (II);

[0046] Where r is C 6 Linear alkane;

[0047] The polysiloxane polyether diol has a weight average molecular weight of 2400-, which has the following structural formula (III).

[0048]

[0049] Among them, N and N 1 The ratio is 1:10;

[0050] The nanofiller is a hydroxide, a particle diameter of 500 nm; the nanofer is surfacely modified by an amino silicilian coupling agent, a surface grafted amino group of nano...

Embodiment 3

[0057] A high-adhesive epoxy resin composition for carbon fibers, according to weight, including the following raw materials: bisphenol A epoxy resin, 13 parts of pyridine epoxy resin, 28 polysiloxane polyether diols, 4 parts of nano-filler, 6 short cuts, 51 active diluents, 75 nickal anhydride; the bisphenol A epoxy resin has 250 g / eq epoxy equivalent, the viscosity of 7000 cps, hydrolyzed chlorine content is less than 0.002 %.

[0058] The pyridyl epoxy resin is a structural formula (I);

[0059] Where r is C 2 Straight alkane, structure is -CH 2 CH 2 -;

[0060] The polysiloxane polyether diol has a weight average molecular weight of 2100, with the following structural formula (III),

[0061]

[0062] Among them, N and N 1 The ratio is 1.5: 10;

[0063] The nano-filler is titanium dioxide, the particle diameter is 300 nm; the nanofiller is surfacely modified by an amino silicone coupling agent, a surface grafted amino group of the nanofiller; the short cut fibers are carb...

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

PropertyMeasurementUnit
epoxy equivalentaaaaaaaaaa
particle diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a pultrusion method of a high-viscosity epoxy resin composition for carbon fibers.Bisphenol A type epoxy resin is taken as a main body resin component, pyridine epoxy resin with bipyridine and terpyridine rings is added, so that the high viscosity and low curing rate of the bisphenol A type epoxy resin are improved, the adhesion and curing speed of the bisphenol A type epoxy resin and carbon fibers are improved, and the interlayer peel strength and mechanical property of a product are improved; meanwhile, polysiloxane polyether glycol, nano filler and chopped fibers are added for toughening. On the other hand, according to the exothermic peak, curing speed and other parameters of the high-viscosity epoxy resin composition, a proper pultrusion process is screened out, the high-viscosity epoxy resin composition has high linear speed and curing speed and high demolding performance, and the obtained product has good surface quality and good mechanical properties.

Description

Technical field [0001] The present invention belongs to the technical field of advanced composite materials, and more particularly to a pultrusion molding method for a highly adhesive epoxy resin composition for carbon fibers. Background technique [0002] Carbon fiber composites are advanced materials such as fiber reinforcing bodies such as carbon fibers or their fabric, with epoxy resins, unsaturated polyesters, vinyl resins, and excellent mechanical properties. Advantageous designability, etc., is widely used in aerospace, wind power generation and pressure vessels. The epoxy resin is excellent in carbon fiber impregnation, and the resin itself has good mechanical properties, chemical resistance and dimensional stability after the resin itself, and is one of the most important matrix materials in the carbon fiber reinforced resin matrix composite. [0003] Different carbon fiber composite molding processes have a large difference, and the matching of epoxy resin systems and m...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L83/12C08K3/26C08K9/06C08K7/06
CPCC08L63/00B29C70/521C08K2003/265C08L2205/025C08L2201/08C08L83/12C08K3/26C08K9/06C08K7/06
Inventor 林文丹李刚黄必文郑斯祥邓辉尧邱诗砚
Owner 广东华彩复合材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap