| abstract |
The invention discloses an organic silicon adhesion promoter for LED packaging high refractive index addition type silica gel, a preparation method and an application thereof. The preparation method is to stir the organic silicon compound containing hydroxyl group and phenyl group, epoxy silane, ester silane and solvent evenly at room temperature, add a titanate catalyst, react at a temperature of 25-60° C. for 6-15 hours, and then The reaction is continued for 2-6 hours at a vacuum degree of 0.05-0.098MPa and a temperature of 60-140° C. to prepare a high-refractive-index organic silicon adhesion promoter containing epoxy groups and ester groups. The adhesion promoter prepared by the present invention has a high refractive index, good compatibility with high-refractive-index addition-type silica gel for LED packaging, and can significantly improve the adhesive performance of silica gel, especially for polyphthalamide and polyterephthalamide. The bonding properties of 1,4-cyclohexanedimethylformyl formate and plastic substrates such as polycarbonate can be widely used in the field of LED device packaging. |