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Waterborne epoxy resin emulsion as well as preparation method and application thereof

A water-based epoxy resin and epoxy resin technology, applied in textiles and papermaking, recycling technology, fiber treatment, etc., can solve problems such as unsatisfactory effect and inability to form a uniform and stable emulsion, and achieve stable thermodynamics and excellent performance of the system , the effect of simple process

Active Publication Date: 2021-06-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the technical problem that the existing water-based carbon fiber sizing agent cannot form a uniform and stable emulsion, and the effect is not ideal when used as a carbon fiber sizing agent, the present invention provides an emulsion with extremely small particle size, excellent stability, and relatively high performance of the prepared carbon fiber material. Good a kind of aqueous epoxy resin emulsion and its preparation method and application

Method used

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  • Waterborne epoxy resin emulsion as well as preparation method and application thereof
  • Waterborne epoxy resin emulsion as well as preparation method and application thereof
  • Waterborne epoxy resin emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Add 20mL of absolute ethanol and 12g of epoxy resin containing a helical ring acetal structure into a three-necked flask in turn, measure 2g of diethanolamine and drop it into the reaction system, raise the temperature to 80°C, and react for several hours. Become clarified, leave standstill to remove ethanol and promptly obtain the epoxy resin containing helical ring acetal structure modified by diethanolamine;

[0033] 2) Weigh 0.5g of the surfactant obtained in step 1), place 2.0g of E51 epoxy resin and measure 20g of absolute ethanol to be miscible at 50°C;

[0034] 3) Add 100 mL of deionized water to the solution in 2), and add 0.1 g of acetic acid for neutralization. After the neutralization reaction is complete, a water-based epoxy resin emulsion is obtained.

[0035] 4) Sizing agent preparation: the water-based epoxy resin emulsion is prepared as a sizing agent, and its solid content is 2%;

[0036] 5) Sizing drying: put the prepared sizing agent in the sizin...

Embodiment 2

[0038] The difference between the water-based epoxy resin emulsion in this embodiment and the water-based epoxy resin emulsion in Example 1 is that: 1) the epoxy resin used in is E51.

Embodiment 3

[0040] The difference between the water-based epoxy resin emulsion in this example and the water-based epoxy resin emulsion in Example 1 is that the amount of ethanol used is 12g.

[0041] The water-based epoxy resin emulsion system of this embodiment is unstable, and the precipitation increases with prolongation of standing time.

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Abstract

The invention relates to a waterborne epoxy resin emulsion as well as a preparation method and application thereof, solves the technical problems that a uniform and stable emulsion cannot be formed by an existing waterborne carbon fiber sizing agent, and the effect is not ideal when the emulsion is used as a carbon fiber sizing agent, and provides the waterborne epoxy resin emulsion. The waterborne epoxy resin emulsion comprises the following components in parts by mass: 1-10 parts of modified epoxy resin, 2-10 parts of bisphenol A epoxy resin, 5-50 parts of a cosurfactant and 100-400 parts of water. The invention also provides a preparation method and application thereof. Thewaterborne epoxy resin emulsion can be applied to the field of preparation of the carbon fiber sizing agent.

Description

technical field [0001] The invention relates to an epoxy resin emulsion and its preparation method and application, in particular to a water-based epoxy resin emulsion and its preparation method and application. Background technique [0002] Carbon fiber-reinforced resin-based composites often use the sizing method to bundle, protect and enhance the functional group content on the surface of carbon fibers. Carbon fiber sizing agents mainly include solvent-based sizing agents and water-based sizing agents. Usually, solvent-based sizing agents require a large amount of flammable and volatile organic solvents, which will cause environmental pollution and solvent waste during production and use. In addition, the solvents are relatively volatile during the sizing process and the resin will remain on the guide rollers, which will cause subsequent passing. Fiber damage. The water-based sizing agent uses water as a solvent and has the advantages of being non-toxic, tasteless, safe ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L63/00C08L63/02D06M15/55C08G59/14D06M101/40
CPCC08J3/03D06M15/55C08G59/1477D06M2101/40D06M2200/40C08J2363/00C08J2463/02C08J2363/02C08J2463/00Y02W30/62
Inventor 于运花邓桢杨小平
Owner BEIJING UNIV OF CHEM TECH
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