1、Stable waterborne epoxy resins: Impact of toughening agents on coating
Commercial waterborne epoxy resins, characterized by an epoxy equivalent weight of approximately 1000 g/eq, form the foundation of two-package, anti-corrosion primers for metals. By combining with standard amine curing agents, these primers form dense protective coatings via air-drying at 20 °C within about seven days.
2、What is the density of waterborne curing agents?
For example, some waterborne epoxy curing agents might have a density around 1.05 g/cm³. These are often used in industrial coatings where good adhesion and chemical resistance are required. On the other hand, waterborne polyurethane curing agents could have a density closer to 1.1 g/cm³. They're great for applications that need high flexibility and abrasion resistance, like in automotive ...
3、Development of Waterborne Epoxy Curing Agents
Crosslinking Density Control: Achieving the same high strength and toughness as solvent-based epoxy systems requires sufficient crosslinking density. excessive crosslinking can prolong curing time, affecting production efficiency, while insufficient crosslinking may degrade material performance. Curing Speed and Efficiency: Compared to traditional solvents, waterborne epoxy curing agents ...
4、Toughening and corrosion resistance enhancement of waterborne epoxy
The high brittleness and poor barrier properties of waterborne epoxy anti-corrosion films have limited their widespread application. In this study, a flexible epoxy curing agent capable of room-temperature curing was prepared, and the effects of polyurethane (PU) content and capping agents on the toughness and corrosion resistance of films were systematically investigated. The optimized film ...
翻译Synthesis and Characterization of Waterborne Epoxy
翻译Synthesis and Characterization of Waterborne Epoxy Curing Agent Modified by Silane-翻译人：河南工业大学 王晓云本文其他人文献的翻译,不负任何法律责任!转载请联系作者!论文题目：硅烷改性水溶性环氧树脂固化剂的合成与性能表征英文
Testing of Waterborne Epoxy Curing Agents
2、Fabrication of a nonionic self The 2K waterborne epoxy coating film prepared by the as-prepared nonionic self-emulsifiable curing agent and E51 displayed better thermal property, surface appearance, flexibility, impact resistance, adhesion, and chemical corrosion resistance.
Preparation of waterborne epoxy dispersion and its application in 2K
The coating films from 2K waterborne epoxy coatings occupy excellent wear resistance, thermal stability, hardness and mechanical properties. By exploring the curing mechanism, the superior performances of the coatings film prepared by waterborne epoxy dispersion and waterborne epoxy curing agent are presented.
Preliminary Results on Preparation and Performance of a Self
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.
Synthesis and properties of a nonionic water
The pencil hardness, flexibility, and impact resistance of the waterborne epoxy resin coating film prepared by the non-ionic water-based epoxy curing agent reached or exceeded those of similar products at China and foreign countries.
Preliminary Results on Preparation and Performance of a Self
The epoxy characteristic peak of the self-made waterborne epoxy curing agent disappears, suggesting that the EP1K’s epoxy group underwent a ring-opening reaction in the reaction of the second step, which left no epoxy group residue.
In the field of materials science, waterborne epoxy curing agents, as a critical class of industrial chemicals, directly influence the quality and performance of final products. Density, a fundamental physical property measuring the mass per unit volume, serves as a key indicator for evaluating the performance of curing agents. This paper explores the density of waterborne epoxy curing agents, its impact on product performance, and strategies for optimizing performance through density adjustment.
1. Basic Concept of Waterborne Epoxy Curing Agents
Waterborne epoxy curing agents are compounds containing active hydrogen atoms or epoxide groups that react chemically with epoxy resins to form stable polymers, enabling crosslinking and curing. This curing process enhances mechanical strength, chemical resistance, and thermal stability of materials. Selecting the appropriate waterborne epoxy curing agent is crucial for manufacturing high-performance epoxy products.
2. Definition and Importance of Density
Density, defined as the mass per unit volume of a substance, is a dimensionless physical property reflecting the compactness of matter. For waterborne epoxy curing agents, density correlates with molecular structure stability, volatility, and cost-effectiveness. Higher density indicates lower volatility, reducing solvent evaporation during application, minimizing environmental pollution risks. Additionally, denser curing agents often exhibit better chemical stability, ensuring prolonged product performance.
3. Impact of Density on the Performance of Waterborne Epoxy Curing Agents
a. Volatility and Environmental Effects: Low-density curing agents have higher volatility, releasing more organic solvents during curing. This increases ventilation requirements, poses health risks to applicators, and raises waste-handling costs. In contrast, high-density curing agents significantly reduce volatile organic compound (VOC) emissions, benefiting environmental protection.
b. Cost-Effectiveness: High-density curing agents often involve higher raw material costs and energy consumption during production. While their lower volatility and longer service life may offer long-term economic advantages, short-term high costs might offset immediate benefits.
c. Product Performance: Density is a critical factor in curing agent performance. High-density agents enable faster curing due to reduced volatility, shortening construction cycles and improving productivity. They also provide stronger adhesion and superior mechanical properties, essential for applications requiring high strength and durability.
4. Optimizing Product Performance Through Density Adjustment
To balance density-related trade-offs, manufacturers can adopt the following strategies:
a. Polymerization Method Selection: Different polymerization approaches (e.g., prepolymer methods) influence molecular chain structure and density. Prepolymerization yields purer, more uniform molecules, enhancing density and product quality.
b. Process Parameter Control: Precise regulation of reaction temperature, pressure, and time optimizes molecular weight distribution and density, ensuring desired performance.
c. Additive Incorporation: Additives like plasticizers or stabilizers can adjust density and performance to meet specific application needs.
d. Recycling: Recovering active ingredients from waste curing agents for reuse improves resource efficiency and cost savings.
The density of waterborne epoxy curing agents profoundly affects their performance. By optimizing polymerization methods, controlling process conditions, incorporating additives, and implementing recycling, manufacturers can fine-tune density to enhance product performance for diverse applications. Future advancements in materials science promise the development of more efficient, eco-friendly, and cost-effective waterborne epoxy curing agents, driving industrial progress and sustainability.
