Fast curing anti-flaming prepreg resin with controllable viscosity and preparation method thereof

A fast-curing, prepreg technology, applied in the field of new material preparation, can solve the problems of hardening and uniform dispersion of curing agent and accelerator, uncontrollable resin viscosity, white spots on the surface of products, etc. , The effect of resin wettability improvement

Inactive Publication Date: 2019-03-29
SHENZHEN ACAD OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to solve the uncontrollable resin viscosity, implosion, difficult dispersion of curing agent and accelerator, poor fiber wettability and white spots on the surface of the product during the prepreg resin preparation process. Problem, provide a kind of viscosity-controllable rapid curing flame retardant prepreg resin and its preparation method

Method used

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  • Fast curing anti-flaming prepreg resin with controllable viscosity and preparation method thereof
  • Fast curing anti-flaming prepreg resin with controllable viscosity and preparation method thereof
  • Fast curing anti-flaming prepreg resin with controllable viscosity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The epoxy resin system is composed by mass fraction: 100 parts of liquid epoxy resin, 10 parts of polypropylene glycol diglycidyl ether, 10 parts of CTBN, 5 parts of DMMP, 0.5 parts of defoamer, 7 parts of ultrafine dicyandiamide, 3 parts Modified urea accelerator and 2.5 parts of triethylenetetramine (TETA).

[0043] Preferably, 100 parts of liquid epoxy resin includes 50 parts of E51, 30 parts of F51 and 10 parts of TDE-86.

[0044] The preparation method of epoxy resin composition:

[0045] ① Gradually add 100 parts of liquid epoxy resin, 10 parts of polypropylene glycol diglycidyl ether, 10 parts of CTBN, 5 parts of DMMP, and 0.5 parts of defoamer into the reactor capable of vacuum defoaming, and set the stirring speed at 500 rpm min, vacuum degree 0.85bar, stirring time 30min, fully stir and mix evenly at 70°C, then cool to 40°C-60°C;

[0046] ② Mix 7 parts of ultrafine dicyandiamide and 3 parts of modified urea accelerator, grind and mix on a three-roller mill f...

Embodiment 2

[0054] The epoxy resin system is composed by mass fraction: 100 parts of liquid epoxy resin, 10 parts of polypropylene glycol diglycidyl ether, 10 parts of CTBN, 5 parts of DMMP, 0.5 parts of defoamer, 7 parts of ultrafine dicyandiamide, 3 parts Modified imidazole accelerator and 2.5 parts of triethylenetetramine (TETA).

[0055] Preferably, 100 parts of liquid epoxy resin includes 50 parts of E51, 30 parts of F51 and 10 parts of TDE-86.

[0056] The preparation method of epoxy resin composition:

[0057] ① Gradually add 100 parts of liquid epoxy resin, 10 parts of polypropylene glycol diglycidyl ether, 10 parts of CTBN, 5 parts of DMMP, and 0.5 parts of defoamer into the reactor capable of vacuum defoaming, and set the stirring speed at 500 rpm min, vacuum degree 0.85bar, stirring time 30min, fully stir and mix evenly at 70°C, then cool to 40°C-60°C;

[0058] ② Mix 7 parts of ultrafine dicyandiamide and 3 parts of modified imidazole accelerator, grind and mix on a three-rol...

Embodiment 3

[0065] The epoxy resin system is composed by mass fraction: 100 parts of liquid epoxy resin, 10 parts of polypropylene glycol diglycidyl ether, 10 parts of CTBN, 5 parts of DMMP, 0.5 parts of defoamer, 7 parts of ultrafine dicyandiamide, 1.5 parts Modified urea accelerator, 1.5 parts of modified imidazole accelerator and 2.5 parts of triethylenetetramine (TETA).

[0066] Preferably, 100 parts of liquid epoxy resin includes 70 parts of E51 and 30 parts of F51.

[0067] The preparation method of epoxy resin composition:

[0068] ① Gradually add 100 parts of liquid epoxy resin, 10 parts of polypropylene glycol diglycidyl ether, 10 parts of CTBN, 5 parts of DMMP, and 0.5 parts of defoamer into the reactor capable of vacuum defoaming, and set the stirring speed at 500 rpm min, vacuum degree 0.85bar, stirring time 30min, fully stir and mix evenly at 70°C, then cool to 40°C-60°C;

[0069] ② Mix 7 parts of superfine dicyandiamide, 1.5 parts of modified urea accelerator, and 1.5 part...

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Abstract

The invention discloses a fast curing anti-flaming prepreg resin with controllable viscosity and a preparation method thereof. The fast curing anti-flaming prepreg resin with controllable viscosity ismainly used for solving the technical problems of uncontrollable resin viscosity, implosion and difficulty in uniform dispersion of curing agent and accelerant during the blending process of prepregresin, low fiber wettability and white dots on the product surface. According to the invention, epoxy groups are controllably pre-polymerized in the manner of quantitatively adding amido functional groups into a liquid epoxy resin, molecular weight is increased and viscosity is increased after some epoxy groups are polymerized, so that the purpose of controlling resin viscosity can be achieved. The prepreg resin prepared according to the invention has the advantages of excellent fiber wettability, proper viscidity, excellent paving property, high toughness, excellent flame retardant property,and the like, and can be widely applied to the fields of rail traffic, unmanned aerial vehicles, aerospace, and the like.

Description

technical field [0001] The invention belongs to the technical field of new material preparation, and in particular relates to a fast-curing flame-retardant prepreg resin with controllable viscosity and a preparation method thereof. The material has controllable viscosity, excellent wetting performance, and a long storage period. Background technique [0002] Prepreg is a composite material made of fiber yarn, epoxy resin, release paper and other materials, which are processed by coating, hot pressing, cooling, laminating, coiling and other processes. It is widely used in fishing tackle, sports equipment, sports equipment, etc. Supplies, rail transportation, aerospace and other fields, military used to manufacture rockets, missiles, satellites, radars and other important military products. [0003] The performance of prepreg is mainly related to fiber type, resin performance, glue content, degree of infiltration and porosity. The content of resin in prepreg is generally betwe...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08J5/24C08G59/50C08G59/68
CPCC08G59/504C08G59/686C08J5/24C08J2363/00C08J2463/00
Inventor 李振伟晏义伍曹海琳
Owner SHENZHEN ACAD OF AEROSPACE TECH
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