Benzoxazines for Industrial Applications Comparison with Other Resins, Formulation and Toughening Know-How, and Water-Based Dispersion Technology

Publisher Summary The promising family of benzoxazines is developed by academia and industry as a new type of phenolic resins, which can potentially open up new applications and product opportunities. Due to the molecular design flexibility of benzoxazines, certain desired properties can be tailored. For most customers or end-users the underlying chemical structures or physical principles are only of secondary importance. Due to the advantages of benzoxazines, it is expected that the use of benzoxazines will grow significantly in the future and become an important part in general industry. The synthesis of benzoxazines can be performed with or without solvents. The industrial application of benzoxazine resins, these oligomers often prove to be beneficial in several ways. In this chapter the general properties of benzoxazines with various other thermosetting materials like standard phenolic resins, BMI, and epoxides are compared. All its aspects are described with an emphasis on the methodology of research activities. Special focus is laid on the toughening additives. The chapter explains efforts to extent the area of benzoxazine research to the field of water-based dispersions. Polymerizable nonionic benzoxazine surfactants and two different types of polymerizable benzoxazine based protective colloids are developed that can effectively stabilize different benzoxazine-based formulations as small droplets in water. The described benzoxazine containing surface-active stabilizers have the strong advantage that they can seamlessly copolymerize and become an integral part of a polybenzoxazine network upon curing.