Filled Silicone Compositions, Preparations And Uses Thereof

摘要

This invention comprises filled silicone compositions initially having a slump of at least 2.5 millimeters when tested described in ASTM D2202-00(2010) except temperature shall be 25 degrees Celsius and time shall be 5 minutes, and a method of preparing and uses of the composition.

主权项

1. A first filled silicone composition comprising a mixture of ingredients (A), (B), and (C): (A) endcapping reaction products comprising a silyloxy-endcapped polydiorganosiloxane (SiOE Polymer) and a moisture scavenging effective amount of a first self-catalytic silane (SCS1), which ingredient (A) has been prepared by reaction of a hydroxyl-endblocked polydiorganosiloxane having a kinematic viscosity of from 10,000 Centistokes (cSt) to 100,000 cSt (HOE Polymer) and an endcapping/scavenging effective amount of the SCS1; (B) treating reaction products comprising a silane-treated silica and a moisture scavenging effective amount of a second self-catalytic silane (SCS2), which ingredient (B) has been prepared by reaction of an untreated silica, an activating effective amount of water, and a treating/scavenging effective amount of the SCS2; and (C) a catalytically effective amount of a cure catalyst; wherein ingredients (A) and (B) have been premixed to give a uniform premixture of ingredients (A) and (B), and then ingredient (C) has been added to the uniform premixture of ingredients (A) and (B) so as to prepare the mixture of ingredients (A) to (C); wherein the composition initially has characteristic (a): a slump of ≧2.5 millimeters (mm) when tested as described in ASTM D2202-00(2010) except temperature shall be 25 degrees Celsius (° C.) and time shall be 5 minutes.