Siloxane compound and process for producing the same

摘要

A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.

主权项

1. A siloxane compound comprising a plurality of siloxane repeating units, wherein at least a first portion of the siloxane repeating units are cyclosiloxane repeating units conforming to the structure of Formula (XL)wherein R1 and R2 are independently selected from the group consisting of alkyl groups, substituted alkyl groups, cycloalkyl groups, substituted cycloalkyl groups, alkenyl groups, substituted alkenyl groups, cycloalkenyl groups, substituted cycloalkenyl groups, heterocyclyl groups, substituted heterocyclyl groups, aryl groups, substituted aryl groups, heteroaryl groups, substituted heteroaryl groups, trialkylsiloxy groups, aryldialkylsiloxy groups, alkyldiarylsiloxy groups, and triarylsiloxy groups; R20 and R21 are independently selected from the group consisting of hydrogen, alkyl groups, substituted alkyl groups, alkanediyl groups, substituted alkanediyl groups, cycloalkyl groups, substituted cycloalkyl groups, alkenyl groups, substituted alkenyl groups, alkenediyl groups, substituted alkenediyl groups, cycloalkenyl groups, substituted cycloalkenyl groups, heterocyclyl groups, substituted heterocyclyl groups, aryl groups, substituted aryl groups, heteroaryl groups, substituted heteroaryl groups, trialkylsiloxy groups, aryldialkylsiloxy groups, alkyldiarylsiloxy groups, and triarylsiloxy groups; provided only one of R20 and R21 can be hydrogen; and further provided, if one of R20 and R21 is selected from the group consisting of alkanediyl groups, substituted alkanediyl groups, alkenediyl groups, and substituted alkenediyl groups, then the other of R20 and R21 is also selected from the group consisting of alkanediyl groups, substituted alkanediyl groups, alkenediyl groups, and substituted alkenediyl groups, and R20 and R21 are bonded to form a cyclic moiety; R3 and R4 are independently selected from the group consisting of haloalkyl groups, aralkyl groups, aryl groups, substituted aryl groups, heteroaryl groups, and substituted heteroaryl groups; x is 0 or any positive integer; and y is a positive integer from 1 to 6; and wherein at least a second portion of the siloxane repeating units are siloxane repeating units conforming to the structure of Formula (XV)