1、Preliminary Results on Preparation and Performance of a Self

The infrared absorption spectra of E20, EP1K, and the water-based epoxy curing agent were compared and analyzed. The coating properties of the waterborne epoxy varnish, which was based on water-based epoxy curing agents to emulsify and cure the resin E44, were systematically tested.

2、Effects of resin/curing agent stoichiometry and coalescence of emulsion

A salt-spray test was conducted to evaluate the corrosion resistance of the coatings. The coatings produced with an excessive amount of coalescent and curing agents exhibited the lowest corrosion resistance. The best results were obtained with 7% coalescent agent and reduced amounts of curing agent.

3、Preparation and Properties of Waterborne Epoxy Emulsion

The obtained cured films by reacting the emulsion and amine curing agent at room temperature showed good water resistance and pollution resistance. Its water absorption rate and water loss...

4、Preliminary Results on Preparation and Performance of a Self

Abstract: Polyethylene glycol 1000 (PEG1000) and epoxy resin E20 were used to synthesize the E20/PEG1000 polymer (EP1K), which was later transformed into a self-emulsifying water-based epoxy...

5、The epoxy resin system: function and role of curing agents

Curing agents are composed of compounds containing active hydrogen and its derivatives, ionic and cationic inhibitors, and reactive cross-agents that are typically of equal weight [4, 5].

Effect of Curing Agent Dosage on Fire Resistance of Waterborne Epoxy

Therefore, this paper studies different proportions of waterborne epoxy emulsion and curing agent. The results show that when m (epoxy emulsion): m (curing agent) = 7:3, the fire resistance and comprehensive performance of the coating are the best.

Preparation and properties of emulsion epoxy curing agent

An emulsion epoxy curing agent（WCA） was prepared by reverse transformation based on the hydrophobicity difference between NIRE and ES，and the application performance of WCA-cured two-component waterborne epoxy primer was investigated.

Improved curing performances of epoxy resin by a structure

The curing kinetics of liquid epoxy resin (E-51) in the presence of curing agent was studied by differential scanning calorimetry (DSC), and the curing process of cured film was observed by light microscope.

Preliminary Results on Preparation and Performance of a Self

Polyethylene glycol 1000 (PEG1000) and epoxy resin E20 were used to synthesize the E20/PEG1000 polymer (EP1K), which was later transformed into a self-emulsifying water-based epoxy curing agent by reacting with m-Xylylenediamine (MXDA).

Curing reactions of epoxy powder coatings in perspectives of chemical

The properties of the cured products of epoxy powder coatings are dominated by the curing systems. This review discusses the types, reaction principles, characteristics of curing agents and accelerators that participate in the curing reaction with different epoxy resins.

In modern construction and industrial applications, epoxy emulsion is widely used as a critical material due to its excellent adhesive properties, chemical resistance, and mechanical strength. the curing process of epoxy emulsion is complex and crucial, directly impacting the final product's performance. Among the factors influencing the curing outcome, the proportion of curing agent plays a significant role.

I. Basic Concept of Epoxy Emulsion

Epoxy emulsion is a waterborne emulsion containing epoxy groups, typically composed of epoxy resin, curing agent, diluent, and other additives. It boasts superior bonding, corrosion resistance, and mechanical properties, making it widely applicable in coatings, adhesives, anticorrosion layers, and other fields.

II. Role of the Curing Agent

The curing agent is an indispensable component in the curing process of epoxy emulsion. Its primary function is to react with epoxy groups to form a stable three-dimensional network structure, endowing the material with excellent physical and chemical properties. The selection and dosage of the curing agent are decisive factors in achieving optimal curing results.

III. Importance of Curing Agent Proportion

The proportion of the curing agent refers to the volume ratio of the curing agent to the epoxy emulsion. This ratio directly affects curing speed, post-cure hardness, flexibility, and corrosion resistance. precise control of the curing agent proportion is essential.

IV. Methods for Determining Curing Agent Proportion

The proportion of the curing agent can be determined using the following methods:

1. Mass Ratio Method: Calculate the required mass of epoxy emulsion based on the target density and volume of the cured material. Divide this mass by the density of the epoxy emulsion to obtain the curing agent mass. For example, if the target density is 1.5 g/cm³ and the epoxy emulsion density is 1.2 g/cm³, the curing agent mass is 0.3 g/cm³.

2. Volume Ratio Method: Calculate the required volume of epoxy emulsion based on the target volume of the cured material. Divide this volume by the epoxy emulsion volume to determine the curing agent volume. For instance, if the target volume is 50 cm³ and the epoxy emulsion volume is 40 cm³, the curing agent volume is 10 cm³.

3. Empirical Method: Determine the optimal proportion through experimentation. Add a small amount of curing agent to a sample of epoxy emulsion, observe the reaction, and gradually adjust the curing agent quantity until the desired curing effect is achieved.

V. Impact of Curing Agent Proportion on Performance

1. Curing Speed: Excessive or insufficient curing agent proportions affect curing speed. High proportions lead to rapid curing and excessive hardness, while low proportions slow the process and extend construction time.

2. Hardness and Flexibility: The proportion directly influences post-cure hardness and flexibility. Higher proportions typically result in greater hardness and reduced flexibility, with the opposite effect observed at lower proportions.

3. Corrosion Resistance: The proportion affects overall corrosion resistance. An appropriate amount enhances performance, while excess may degrade it.

VI. Practical Considerations

1. Curing Agent Selection: Choose suitable curing agents (e.g., amine-based, acid anhydride-based) based on specific applications.

2. Proportion Accuracy: Adhere strictly to calculated ratios to avoid over- or under-dosing.

3. Testing and Adjustment: Conduct preliminary tests before application and refine the proportion based on results.

The curing agent proportion is a critical factor in the curing process of epoxy emulsion. By optimizing the proportion and selecting appropriate curing agents, high-performance epoxy products tailored to specific requirements can be achieved. In practice, adjustments and optimizations should be made based on specific needs and conditions to ensure optimal outcomes.