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AssigneeFlexible Ceramics, Inc.
InventorWilliam A. Clarke
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High heat resistant elastic composite laminates, sealants, adhesives, and coatings developed from a resin blend. The resin blend is made up of methyl and optionally phenyl silsequioxane resins selected to produce silanol-silanol condensation silicone polymers formed in a slowly evolving reaction mass containing submicron boron nitride, silica and boron oxide fillers. The required ratio of submicron boron nitride to silica has been discovered for assuring the formation of a high temperature resistant elastic composite blend that will form intermediate flexible ceramic products up to 600 deg C., then continue to form preceramic then dense ceramic products from 600 to 1000 deg C. The thermal yield of the composite is generally greater than 90 wt. % at 1000 deg C. Composite products with different levels of heat transformation can be fabricated within the same product depending upon the thickness of the layers of reinforcement.
A composite comprising
The invention also includes fireproof fastener adhesives that can bond stainless steel (not restricted to stainless steel) bolts at 550° C. exceeding Loctite's liquid gasket peak temperature and torque retention capabilities. The same adhesive applied between 1 mm thick fire penetration test panels were certified by National Testing Systems as also passing the severe 2000 F. test for 15 minutes with no failure of the bonded panels.
This invention includes micro rods made from the resin blend and twisted or braided fiber reinforced rods cured up to 300° C. for maximum elastic rebound. Also separate fibers removed from the rods as short cut reinforcement is added to assure micro sealing advantages.
The composite discoveries include fire resistant fiber reinforced laminates, sealants, and adhesives invented from the resin blend and specialty thermo-insulating coatings also made from the resin blend. The fibers selected for the inventions are generally all commercially available high temperature fibers including the E, S, quartz and chemically modified glass, ceramic fibers including Nextel®, Nicolon, polysilazane, zirconia and alumina fibers and all carbon, pitch and rayon carbon fibers including whiskers derived from specialized vapor grown processes and nanometer levels of processing.
Dependencies are inferred from the claim text.