Universal carbon fiber sizing agent for unsaturated acid-modified epoxy resin, preparation method and application thereof

An epoxy resin, unsaturated technology, applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problem of only applying a single type of matrix resin, etc., and achieve the effect of improved interface bonding ability, less hair, and excellent comprehensive performance

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the current small tow carbon fiber sizing agent is only suitable for a single type of matrix resin, the purpose of the present invention is to provide a general-purpose carbon fiber sizing agent for unsaturated acid-modified epoxy resins that can be applied to various types of matrix resin systems , preparation method and application

Method used

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  • Universal carbon fiber sizing agent for unsaturated acid-modified epoxy resin, preparation method and application thereof
  • Universal carbon fiber sizing agent for unsaturated acid-modified epoxy resin, preparation method and application thereof
  • Universal carbon fiber sizing agent for unsaturated acid-modified epoxy resin, preparation method and application thereof

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Embodiment

[0044] 1. Preparation of sizing agent

[0045] 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. Add quantitative diluent, inorganic inhibitor, unsaturated acid, bromide quaternary ammonium salt catalyst (all adopting from Sinopharm Group Chemical Reagent Co., Ltd.) in the four-necked flask successively, control material temperature to react at 70 ℃ for 7 hours, 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.

[0046] See Tables 1-2 for the types and amounts of the bisphenol-A epoxy resin, un...

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Abstract

The invention discloses an unsaturated acid modified epoxy resin universal carbon fiber sizing agent, and a preparation method and an application thereof. The universal carbon fiber sizing agent comprises the following components: bisphenol A based epoxy resin, aliphatic binary monounsaturated acid with double end groups which are carboxyl, an aromatic active diluent containing one epoxide group in molecule, an inorganic polymerization inhibitor, and a quaternary ammonium bromide catalyst. The sizing agent is suitable for sizing 1K-12K small filament bundle carbon fiber for aerospace, the maximum decomposition peak temperature of reaction products is higher than 325 DEG C, 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 phenolic resin is substantially improved.

Description

technical field [0001] The invention belongs to the field of carbon fiber sizing agents, and in particular relates to a general-purpose carbon fiber sizing agent modified with unsaturated acid, a preparation method and an application thereof. Background technique [0002] Carbon fiber-reinforced resin-based composite materials have various excellent physical and mechanical properties such as light weight, high strength, temperature resistance, and electrical conductivity. has been widely used. In the preparation of aircraft represented by fighter jets and civil airliners, and spacecraft represented by rockets, missiles and satellites, carbon fiber-reinforced epoxy-based, phenolic-based, and bismaleimide-based composite materials are used for their excellent weight reduction As a result, it can greatly replace traditional metal materials as main load-bearing and secondary load-bearing structural components, and improve the working efficiency and scope of aerospace vehicles. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55C08G59/14D06M101/40
CPCC08G59/1438D06M15/55D06M2101/40D06M2200/40
Inventor 季春晓黄翔宇曹阿民刘瑞超曹志梅张捷王平翁丽萍
Owner CHINA PETROLEUM & CHEM CORP
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