Patent ID: 8497024
Filing Date: 2013-07-30
Classification: C08G,C08L,Y10T

Abstract:
1. A method comprising applying to an LED an organopolysilmethylene-siloxane composition comprising: (A) 1 to 100 parts by weight of an organopolysilmethylene-siloxane represented by the following general formula (1): wherein: R 1 is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms other than an alkenyl group, an alkoxy group, a hydroxy group, and a halogen atom; R 2 is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms other than an alkenyl group, an alkoxy group, a hydroxy group, a halogen atom, and (R 1 ) 3 SiCH 2 —; R 3 is, independently of each other, a group selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 4 carbon atoms; k is an integer of 1 to 100; and n is an integer of 1 to 1000, said organopolysilmethylene-siloxane having, in a molecule, at least two out of alkoxy groups, hydroxy groups, and halogen atoms bonded to one or more silicon atoms; (B) 0 to 99 parts by weight, provided that a total of the amounts of (A) and (B) is 100 parts by weight, of an organopolysiloxane represented by the following general formula: wherein R 1 is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms other than an alkenyl group, an alkoxy group, a hydroxy group, and a halogen atom, and m is an integer of 0 to 300; and having, in a molecule, at least two out of alkoxy groups, hydroxy groups and halogen atoms bonded to one or more silicon atoms; (C) 1 to 30 parts by weight of a curing agent which is an organosilicon compound represented by the following general formula: and/or a partial hydrolysis condensate thereof, wherein R is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms; X is, independently of each other, a group selected from the group consisting of ketoxime, alkoxy, and 1-methylvinyloxy groups; and a is 0, 1, or 2; and (D) a catalytic amount of a curing catalyst and curing the composition, thereby providing a sealing material on the LED.