TEMPERATURE-RESISTANT SILICONE RESINS

摘要

Methods and formulations for modified silicone resins of Formula (II) are presented. Formula (II) comprises at least one of each of the following subunits:;;The R1, R2, R3, R6, R7, R8, R9, R10, R11, R12 and R13 are each independently selected from a group consisting of H, alkyl, alkenyl, alkynyl, and aryl. The X is selected from a group consisting of arylene, transition metal, inorganic oxide, and silsesquioxane. The values of t ranges from 1 to 10, y ranges from 1 to 200 and z ranges from 1 to 1,000. The elastomeric materials prepared from modified silicone resins display robust mechanical properties following prolonged exposure to high temperatures (e.g., 316° C. or higher).

主权项

1. A modified silicone resin of Formula (II): wherein:
R6, R7, R8, R9, R10, and R11 are each independently selected from a group consisting of H, alkyl, alkenyl, alkynyl, and aryl;X is selected from the group consisting of inorganic oxide, arylene, transition metal, cyclosiloxane, silsesquioxane, wherein R21, R22, R23, R24, and R25 are independently selected from the group consisting of propoxy, butoxy, and phenyl and R55 and R56 are independently methyl or phenyl;
t ranges from 1 to 10;y ranges from 1 to 200; andz ranges from 1 to 1,000, wherein the resin of Formula (II) has a viscosity ranging from about 500 cSt to about 10,000 cSt.