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A modified epoxy resin small tow universal carbon fiber sizing agent, preparation method and application thereof

A technology of epoxy resin and small tow, which is applied in the fields of carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of difficulty in carbon fiber preparation and cost increase, no carbon fiber sizing agent has been found, and product stability is difficult to guarantee. Improved binding ability, relief of high viscosity, and high versatility

Active Publication Date: 2020-11-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when sizing carbon fiber needs to be used with different matrix resins, it is necessary to frequently change the type of online sizing agent in the production of carbon fiber engineering line according to the specified matrix resin and processing technology, and at the same time adjust the sizing process according to the requirements, resulting in difficulty and cost of carbon fiber preparation It has been greatly improved, and product stability is difficult to guarantee, which brings great troubles to the further application and expansion of carbon fiber
Therefore, develop a kind of sizing that can all have good interfacial action with epoxy resin, phenolic resin, bismaleimide resin, particularly have the greatly improved interfacial strength with epoxy resin, bismaleimide resin The sizing agent has extremely high economic and industrial value in the industry, and no carbon fiber sizing agent that can meet these requirements has been found in the current report

Method used

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  • A modified epoxy resin small tow universal carbon fiber sizing agent, preparation method and application thereof
  • A modified epoxy resin small tow universal carbon fiber sizing agent, preparation method and application thereof
  • A modified epoxy resin small tow universal carbon fiber sizing agent, preparation method and application thereof

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Experimental program
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Effect test

Embodiment

[0047] 1. Preparation of sizing agent

[0048] Put quantitative bisphenol A type epoxy resin (Shell Company, USA) in a four-necked flask with a mechanical stirring device, heat to 110°C, and maintain a vacuum pressure of 10-0.5mmHg for 2 hours to dehydrate until the system is completely free of bubbles. Cool down to 70°C, feed 99.999% high-purity nitrogen gas, and remove the vacuum device at the same time. In the four-necked flask, add quantitative diluent, hydroquinone polymerization inhibitor, unsaturated acid, imidazole catalyst (all adopted from Sinopharm Chemical Reagent Co., Ltd.) successively, control the material temperature at 70 ℃ for 7 hours, and then After heating up to 120° C. for 2.5 hours, the heating was stopped. When the temperature of the system drops to normal temperature, the stirring is stopped to obtain the unsaturated acid-modified epoxy resin sizing agent.

[0049] See Tables 1-2 for the types and amounts of the bisphenol-A epoxy resin, unsaturated ac...

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Abstract

The invention discloses a modified epoxy resin small filament bundle universal carbon fiber sizing agent, and a preparation method and an application thereof. The modified epoxy resin small filament bundle universal carbon fiber sizing agent comprises the following components: bisphenol A type epoxy resin, aliphatic binary monounsaturated acid with double end groups which are carboxyl, an aliphatic active diluent containing one epoxide group in molecule, a hydroquinone polymerization inhibitor, and an imidazole catalyst. The sizing agent is suitable for sizing 1K-12K small filament bundle carbon fiber for industry, the number-average molecular weight of reaction products is 2350-2550, sized carbon fiber and epoxy resin, phenolic resin, bismaleimide resin and other thermosetting resin substrates have good interface bonding strength with good versatility, and especially interface bonding strength of epoxy resin and bismaleimide resin is substantially improved.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber sizing agents, and in particular relates to a modified epoxy resin small tow general-purpose carbon fiber sizing agent, a preparation method and an application thereof. Background technique [0002] Composite materials refer to the comprehensive materials formed by the organic combination of two or more single-component materials with different physical and chemical properties through a certain processing technology. At present, the development of fiber-reinforced resin-based advanced composite materials is the fastest. The reinforcing fibers used in advanced resin matrix composites mainly include carbon fiber, aramid fiber, boron fiber, silicon carbide fiber and alumina fiber. Among them, carbon fiber is widely used because of its high modulus and higher degree of industrialization than aramid fiber. When carbon fiber is used as a reinforcing phase to prepare composite materials, the perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55C08G59/42C08G59/24C08G59/68C08K9/04C08K7/06C08J5/06C08L63/00C08L61/06C08L79/08D06M101/40
Inventor 季春晓黄翔宇曹阿民刘瑞超曹志梅常丽张捷袁玉红
Owner CHINA PETROLEUM & CHEM CORP
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