Curable Composition for LED Encapsulation

The patent uses a composite material system combining organometallic catalyst with organopolysiloxane components containing specific functional groups (vinyl, hydrido, epoxy, isocyanate). This composite approach allows the material to simultaneously achieve high light transmissivity in blue-to-UV region and excellent adhesive properties, resolving the contradiction between light optical properties and mechanical adhesion.

The patent modifies the chemical composition parameters of polysiloxane by incorporating specific functional groups (vinyl, hydrido, epoxy, isocyanate) and using organometallic catalysts to control crosslinking density. This parameter optimization allows the material to maintain high light resistance while improving thermal resistance and controlling surface tackness through regulated curing characteristics.

The patent applies local quality by creating a material with spatially differentiated properties through controlled crosslinking. The organometallic catalyst enables selective crosslinking reactions that produce a network structure with local regions of varying density and functionality, allowing the material to simultaneously provide high light resistance and maintain excellent light extraction efficiency in the blue-to-UV region.

The patent applies preliminary action by incorporating organometallic catalyst and functional groups into the polysiloxane structure before curing. This preliminary configuration of reactive groups and catalyst distribution enables controlled crosslinking that achieves high crack resistance while maintaining good processibility during application, as the crosslinking reaction is activated and progresses in a controlled manner after application rather than during handling.