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Views: 6564 Author: Site Editor Publish Time: 2023-12-29 Origin: Site
Alicyclic Epoxy Resins typically refer to a class of epoxy resins with cyclic carbon chain structures in their molecular composition. Industrially, they are usually produced by oxidizing alicyclic olefin compounds, containing two double bonds, through peroxides such as peracetic acid.
These resins form cross-linked network polymers upon reaction with hardeners. As the active groups in Alicyclic Epoxy Resins are directly attached to the alicyclic ring, their reactivity is lower compared to standard Bisphenol A type epoxy resins, often requiring heating with anhydride curing agents. Alicyclic Epoxy Resins, lacking hydroxyl groups in their structure,can use accelerators to enhance reaction speed.
Alicyclic Epoxy Resins stand out for their excellent thermal stability. The epoxy groups being directly linked to the alicyclic ring increase the cross-linking density after curing, resulting in a rigid structure with a high heat resistance temperature.
Unlike Bisphenol A type epoxy resins, which contain phenyl rings leading to poor weather resistance, Alicyclic Epoxy Resins replace these with stable alicyclic structures, offering good weather resistance and anti-yellowing properties.
Since Alicyclic Epoxy Resins are synthesized without using epichlorohydrin, they do not contain chloride ions, sodium ions, or other byproducts, thus providing better dielectric properties than Bisphenol A type epoxy resins.
These resins have a lower viscosity, making pouring and potting operations convenient, and offer good processability. They can be used as epoxy diluents due to their excellent thermal stability, avoiding the issue of decreased heat deformation temperature at high temperatures common with standard diluents.
With their good dielectric properties and weather resistance, they are suitable for encapsulating materials in outdoor high-voltage electric devices, featuring wear resistance, high impact strength, and high thermal deformation temperature.
Due to their low viscosity, high thermal deformation temperature, and good weather resistance, they are widely used in mold materials and high-temperature resistant composite materials.
The temperature and weather resistance properties of Alicyclic Epoxy Resins help maintain the long-lasting color of topcoats without yellowing. They are also applicable in circuit board coatings due to their high hardness, wear resistance, impact resistance, chemical corrosion resistance, and good adhesion.
Alicyclic Epoxy Resins have excellent adhesion, and their bonding strength increases with rising curing temperatures.
In summary, Alicyclic Epoxy Resins offer a remarkable blend of properties that make them highly valuable in various industrial applications. Their superior thermal stability and resistance to weathering set them apart from conventional epoxy resins, providing enhanced durability and longevity in challenging environments.
Additionally, their excellent dielectric properties make them ideal for use in electronic encapsulation, where insulation and protection from external elements are crucial. The low viscosity of these resins further enhances their usability, allowing for ease of application in molding, coatings, and adhesive formulations.
Whether it's in the realm of electronics, composites, or protective coatings, the unique characteristics of Alicyclic Epoxy Resins offer innovative solutions and push the boundaries of material performance.
Their ongoing development and application in various industries underscore their significance as a key material in advancing technology and industrial efficiency.
