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US 6,548,574 B1Granted
Heat-vulcanizable silicone compositions from premix
AssigneeGeneral Electric Company
InventorsDevesh Mathur, Alan L. Tate
Life of this patent
Estimating the term…
Abstract
An untreated filler and a high viscosity silicone polymer premix is charged into a compounding apparatus. Treating agent and additional silicone polymer are added to the premix and the premix, treating agent and additional silicone polymer are compounded to produce a heat vulcanizable filled silicone composition.
Claims23
A process of preparing a heat-vulcanizable filled silicone composition, comprising:
- charging a premix comprising an untreated filler said filler containing surface silanol groups and high viscosity silicone polymer into a compounding apparatus;
- adding HMDZ, a silanol stopped silicone or a methoxy stopped silicone fluid treating agent and additional silicone polymer to said premix;
- and
- compounding said premix, treating agent and additional silicone polymer to produce a heat vulcanizable filled silicone composition.
1 more element
A process of preparing heat-vulcanizable filled silicone compositions, comprising:
- forming a premix from an untreated filler said filler containing surface silanol groups and high viscosity silicone polymer in the absence of a treating agent;
- charging said untreated filler and high viscosity silicone polymer premix into a compounding apparatus;
- adding HMDZ, a silanol stopped silicone or a methoxy stopped silicone fluid treating agent and silicone polymer to said premix;
- and
- compounding premix, treating agent and silicone polymer to produce a heat vulcanizable filled silicone composition.
2 more elements
Dependencies are inferred from the claim text.