1、Preparation of waterborne epoxy dispersion and its application in 2K

Herein we present experimental schemes of a reactive emulsifier and three waterborne epoxy dispersions prepared for waterborne epoxy coatings.

2、Preparation of Waterborne Epoxy Resin Curing Agent and

The curing agent is neutralized with glacial acetic acid to form a salt. The HLB of the product is adjusted by changing the amount of the added glacial acetic acid, which makes it possible to mix the epoxy resin coating with a self-made aqueous epoxy emulsion.

3、Preliminary Results on Preparation and Performance of a Self

In this article, PEG1000 was utilized to construct self-emulsifying EP1K system, and then PEG1K was added to MXDA which converted poisonous MXDA into a non-toxic water-based epoxy curing...

4、Preliminary Results on Preparation and Performance of a Self

In this article, PEG1000 was utilized to construct self-emulsifying EP1K system, and then PEG1K was added to MXDA which converted poisonous MXDA into a non-toxic water-based epoxy curing agent. Moreover, the curing agent also had a good self-emulsifying function.

Fabrication of a nonionic self

In this article, we introduce polypropylene glycol diglycidyl ether (PPGDGE) as a hydrophilic segment and soft segment, not only greatly increasing the molecular weight of the adduct to reduce the volatility but also improving the toughness of the cured film.

Waterborne epoxy curing agent and preparation method and

The invention provides a preparation method of a waterborne epoxy curing agent, which comprises the following steps of: mixing aliphatic polyamine, an organic solvent and epoxy resin under protective gas, and heating to obtain a first intermediate, the aliphatic polyamine containing at least two primary amine groups; mixing the first intermediat...

Preparation of waterborne P

The paper aims to study the preparation of waterborne P-N-containing epoxy resin curing agent and its performances (P-N – phosphorous and nitrogen).

Preliminary Results on Preparation and Performance of a Self

In this article, PEG1000 was utilized to construct self-emulsifying EP1K system, and then PEG1K was added to MXDA which converted poisonous MXDA into a non-toxic water-based epoxy curing agent. Moreover, the curing agent also had a good self-emulsifying function.

Research Progress in Waterborne Epoxy Resin Curing Agent

In this paper，the types and characteristics of waterborne epoxy curing agents were described，and the general preparation methods and advantages anddisadvantages of ionic and non-ionic waterborne epoxy curing agents were summarized.

Self

The invention discloses a self-emulsifying water-borne epoxy resin curing agent and a preparation method thereof.

In modern industry and construction, epoxy resins are widely used in surface treatment, adhesion, and encapsulation due to their excellent properties. Among these, waterborne epoxy resins, as eco-friendly alternatives, have gained attention for their low toxicity and ease of handling. optimizing their performance requires precise curing agent formulation. This article introduces methods for properly preparing waterborne epoxy resin curing agents to achieve desired outcomes in practical applications.

1. Preparation of Base Materials and Equipment

• Waterborne Epoxy Resin: Select a resin suitable for the application environment, considering viscosity, solid content, temperature resistance, and compatibility with the curing agent. Prioritize solvent-free or low-solvent products to minimize health risks during application.
• Curing Agent: Choose based on the epoxy resin’s characteristics. Common options for waterborne epoxies include polyamines, anhydrides, and imidazoles. Each has unique chemical structures and application ranges, requiring scenario-specific selection.
• Mixing Equipment: Use professional mixing tools to combine the curing agent and resin. Ensure equipment cleanliness, sealing, and appropriate stirring speed to achieve uniform blending without air bubbles.
• Safety Gear: Wear protective gloves, masks, and other personal protective equipment (PPE) to prevent skin/respiratory irritation. Maintain ventilated work areas for safety.

2. Proportion Calculation

• Theoretical Ratio: Calculate curing agent dosage based on the epoxy resin’s solid content and type. For example, if the resin’s solid content is 50%, add 1% curing agent theoretically. Practically, increase by 10%-20% to ensure full reaction.
• Practical Adjustments: Account for environmental factors (temperature, humidity) affecting cure time. Higher temperatures shorten cure times, while lower temperatures extend them. Adjust curing agent amounts accordingly.
• Ratio Verification: Validate proportions using standardized tests, such as titration for dosage accuracy or FTIR spectroscopy to analyze post-cure structures.

3. Mixing Process

• Slow Initial Stirring: Allow materials to rest in containers to reduce surface tension. Slowly add the curing agent and mix at low speed to avoid air bubbles.
• Gradual Acceleration: After most curing agent is added, increase stirring speed until uniform consistency is achieved (minutes to tens of minutes, depending on viscosity and equipment).
• Thorough Blending: Maintain consistent speed to prevent layering or clumping. Regularly inspect color/state for anomalies.

4. Storage and Transport

• Cool, Dry Conditions: Store prepared curing agents in shaded, dry areas away from direct sunlight and heat to slow chemical reactions and extend shelf life.
• Freezing Prevention: In cold environments, use insulated containers or preheat curing agents before use.
• Shelf-Life Management: Track expiration dates, as expired curing agents may fail to cure properly or pose safety risks. Follow manufacturer recommendations for usage/storage.

5. Key Considerations

• Environmental Factors: Temperature, humidity, and lighting impact reaction rates and final performance. Control these variables for consistent quality.
• Safety First: Adhere to safety protocols, including PPE use and adequate ventilation, to avoid exposure to hazardous fumes.
• Quality Inspection: Test products (e.g., sampling, lab analysis) before application to ensure compliance with standards. Only qualified materials should be used in engineering projects.

6. Applications and Case Studies

• Construction: Used for concrete coating/repair. Example: Bridge maintenance with waterborne epoxy curing agents improved durability and extended service life.
• Automotive Manufacturing: Applied in vehicle coatings and part bonding. Case: Replacing solvent-based paints with waterborne epoxy curing agents reduced environmental impact while enhancing gloss and durability.
• Electronics Encapsulation: Protects circuit boards. Example: Smartphone production used waterborne epoxy curing agents for reliable, durable protection layers.

By following these steps, waterborne epoxy curing agents can be tailored to specific needs, improving product quality and environmental sustainability. Continuous optimization of formulations and application methods ensures optimal results across industries.