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US 6,471,820 B1Granted
Moisture-curable silicone composition
Assignee3M Innovative Properties Company
InventorLeora M. Paulick
Life of this patent
Estimating the term…
Abstract
Moisture-curable silicone sealing compositions that are tacky and self-supporting at room temperature prior to cure. When measured at 25°±1° C. at a frequency of 0.1 rad/sec, the compositions have a storage shear modulus of at least 9.0 KPa, a loss shear modulus of at least 4.0 KPa, and a viscosity of at least 98.5 KPa Sec.
Claims17
A moisture-curable silicone sealing composition comprising:
- a hydroxy-terminated polydialkylsiloxane;
- fumed silica;
- a silane crosslinking agent;
- and
- an adhesion promoter;
- wherein the moisture-curable silicone sealing composition is characterized by having a storage shear modulus of at least 9.0 kilopascals and a loss shear modulus of at least 4.0 kilopascals prior to curing when measured at 25°±1° C. at a frequency of 0.1 radian per second, said composition being tacky and self-supporting at room temperature prior to curing.
3 more elements
A method of sealing a first surface and a second surface together comprising the steps of:
- (a) applying to said first surface a moisture-curable silicone sealing composition comprising
- a hydroxy-terminated polydialkylsiloxane;
- fumed silica;
- a silane crosslinking agent;
- and
- an adhesion promoter;
- wherein the moisture-curable silicone sealing composition is characterized by having a storage shear modulus of at least 9.0 kilopascals and a loss shear modulus of at least 4.0 kilopascals prior to curing when measured at 25°±1° C. at a frequency of 0.1 radian per second, said composition being tacky and self-supporting at room temperature prior to curing;
- and
- (b) contacting said first surface to which said sealing composition has been applied with said second surface in the presence of moisture to bond said first surface to said second surface.
6 more elements
Dependencies are inferred from the claim text.