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Acrylate with special functional groups in light-curing resins
Release time:
2024-11-12 17:16
Due to their advantages such as rapid curing, high efficiency and energy savings, and environmental friendliness with zero pollution, light-curable resins have found wide applications in fields including coatings, inks, adhesives, and 3D printing. Among these, special functional-group acrylate-based light-curable resins have become a research hotspot in recent years, thanks to their unique functional-group structures and properties.
Special functional-group acrylate photopolymer resins are a class of photopolymer resins that significantly enhance or impart specific properties to the resin by introducing special functional groups into the acrylate molecules. These special functional groups include, but are not limited to, hydroxyl, carboxyl, amino, epoxy, and siloxyl groups. Each of these functional groups possesses unique chemical and physical characteristics, enabling them to endow the resin with diverse properties such as water resistance, weather resistance, heat resistance, and adhesion. Below, we introduce some commonly used special functional-group acrylate photopolymer resins.
I. Hydroxyacrylate
Hydroxyacrylates are a class of resins in which hydroxyl functional groups are introduced into the acrylate molecule. The presence of hydroxyl functional groups endows these resins with excellent wettability and adhesion properties. Moreover, the hydroxyl groups can interact with functional groups on the substrate surface, forming hydrogen bonds or chemical bonds with a wide variety of substrates, thereby further enhancing the adhesion between the coating and the substrate and improving the coating’s strength and durability. Hydroxyacrylates also exhibit good water resistance and weathering resistance, making them suitable for the formulation of water-based coatings, inks, and adhesives.
II. Carboxyl Acrylate
Carboxylated acrylates are a class of resins in which carboxyl functional groups are introduced into the acrylate molecule. The carboxyl functional group is hydrophilic and can effectively enhance the dispersibility of the resin in aqueous systems. This improved dispersibility helps to form uniform coatings in paints and inks, preventing agglomeration and sedimentation, thereby enhancing product stability and endowing the resin with outstanding dispersibility and stability. Meanwhile, the carboxyl functional group can form complexes with metal ions; this complexation strengthens the adhesion between the coating and the metallic substrate, improving the coating's rust-prevention and corrosion-resistant properties. Through this complexation effect, carboxylated acrylate coatings can form a dense protective film on metal surfaces, significantly enhancing their rust-prevention and corrosion-resistant performance.
III. Amino Acrylate
Aminoacrylates are a class of resins in which an amino functional group is introduced into the acrylate molecule. The presence of the amino functional group endows these resins with excellent flexibility and adhesion. The amino groups and ester groups within the aminoacrylate molecules can interact with numerous substances, thereby ensuring strong bonding between materials. At the same time, aminoacrylates can form hydrogen bonds with a variety of substrates, significantly enhancing the adhesion of the coating. This enhanced adhesion ensures that the coating remains firmly bonded to the substrate surface, making it less likely to peel or flake off.
Because amino acrylates possess excellent flexibility and elasticity, they can absorb and dissipate impact energy, thereby enhancing the impact resistance of coatings. Amino acrylates also exhibit good weather resistance and heat resistance, making them suitable for the production of high-performance coatings, inks, and adhesives.
4. Epoxy acrylate
Epoxy acrylates are a class of resins in which epoxy functional groups are introduced into the acrylate molecule. The presence of epoxy functional groups endows these resins with excellent curing performance and crosslinking density. Epoxy acrylates exhibit outstanding curing properties and can be cured either via organic peroxide curing or by photopolymerization. Due to their molecular structure containing multiple reactive functional groups, after curing they form a highly dense crosslinked network, thereby enhancing the coating’s hardness and abrasion resistance. At the same time, they also improve the coating’s hardness, wear resistance, and chemical resistance, while demonstrating good weathering and heat resistance. As a result, epoxy acrylates are well-suited for the production of high-performance coatings, inks, and 3D printing materials.
V. Siloxane Acrylate
Siloxane acrylates are a class of resins in which siloxane functional groups are introduced into the acrylate molecule. Thanks to the presence of siloxane bonds, siloxane acrylates exhibit outstanding weathering resistance. They can withstand the erosion caused by natural factors such as ultraviolet radiation and temperature fluctuations, and remain resistant to aging, yellowing, or embrittlement even after prolonged exposure to outdoor environments. In high-temperature conditions, these resins maintain stable performance and reliability, typically retaining their physical and chemical properties unchanged at elevated temperatures. The presence of siloxane functional groups also endows the resin with excellent chemical resistance, hydrophobicity, and oleophobicity, while enhancing the flexibility and adhesion of coatings.
VI. Conclusion
In summary, special functional-group acrylate-based photocurable resins, by introducing a variety of unique functional groups, not only greatly enrich the performance dimensions of photocurable resins but also lay a solid foundation for their wide-ranging applications across multiple fields. This highlights the tremendous potential of these resins in enhancing product performance and expanding their application areas.
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