Patent ID: 8828500
Filing Date: 2014-09-09
Classification: C08G,C08L,C09J,G03F,H01L,Y10T

Abstract:
1. A method of sealing an organic EL device using a photocurable resin composition for sealing an organic EL device for use in a light source or a display device, which essentially consists of (A) an epoxy resin containing at least two glycidyl groups in each molecule thereof and having a molecular weight of 200 to 7000, (B) an epoxy resin containing at least one glycidyl group in each molecule thereof and having a molecular weight of 20000 to 100000, (C) a latent acid photo catalyst adapted to be activated and produce an acid upon being irradiated with energy beam, and (D) a silane coupling agent containing a glycidyl group in each molecule thereof, wherein the amount of the ingredient (B) is 30 to 150 parts by weight based on 100 parts by weight of the ingredient (A), and the amount of the ingredient (C) is 0.1 to 10 parts by weight and that of the ingredient (D) is 0.3 to 2 parts by weight based on a total amount of 100 parts by weight of both the ingredients (A) and (B), and wherein the photocurable resin composition exhibits non-fluidity at 25° C., while it exhibits fluidity in a range of temperature from 50 to 100° C., and has a viscosity equal to or greater than 10 Pa·s at 100° C., the method comprising the steps of: transferring the photocurable resin composition for sealing an organic EL device onto a glass or film substrate on which an organic EL device is formed or a sealing glass or film, superimposing the glass or film substrate on which the organic EL device is formed and the sealing glass or film so as to sandwich the transferred photocurable resin composition for sealing an organic EL device, and then temporarily fixing the glass or film substrate on which the organic EL device is formed and the sealing glass or film by compression-bonding under heating; and irradiating ultraviolet light to the photocurable resin composition for sealing an organic EL device included in the temporarily fixed substrate to cure the photocurable resin composition for sealing an organic EL device.