FILLED SILICONE FOAM LAYER, COMPOSITIONS AND METHODS FOR THEIR MANUFACTURE, AND ARTICLES INCLUDING THE FILLED SILICONE FOAM LAYER

• Main Authors: VUONG, Katherine, KRISTY, Max, MAZICH, Kenneth
• Format: Patent
• Language: English; French; German
• Published: 11.09.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; SEMICONDUCTOR DEVICES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

A very thin filled silicone foam layer is formed from a composition that includes a curable polysiloxane composition including an alkenyl-substituted polyorganosiloxane, a hydride-substituted polyorganosiloxane, and a cure catalyst; a plurality of expanded polymer microspheres having a largest dimension of less than the thickness of the foam; and a filler composition, wherein each component of the filler composition has a largest dimension of less than the thickness of the foam, the filler composition comprising a particulate ceramic filler, a particulate calcium carbonate filler, or a particulate aluminosilicate clay filler having a plate morphology, or a particulate aluminosilicate clay filler having a hollow tubular morphology, a particulate polymeric silsesquioxane filler, or a particulate methyl-phenyl MQ filler, or a plurality of glass microspheres, or a particulate paraffin wax, or a combination thereof; wherein the curable filled composition has a viscosity of less than 400,000 centiStokes, or 100,000 to 350,000 centiStokes.