FLUOROELASTOMER COMPOSITION

• Main Authors: HOCHGESANG PAUL J, JACKS JAMES W
• Format: Patent
• Language: English; Korean
• Published: 18.03.2004
• Edition: 7
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; GENERAL PROCESSES OF COMPOUNDING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

PURPOSE: Fluoroelastomeric compositions are provided that exhibit as many of the desirable properties as possible while still providing enhanced flowability and processing. CONSTITUTION: The fluoroelastomer composition comprises a mixture of: a peroxide-curable solid fluoroelastomer; a peroxide curative agent combined with the solid fluoroelastomer; a bisphenol-curable liquid fluoroelastomer; and a bisphenol curative agent combined with the liquid fluoroelastomer, wherein the solid fluoroelastomer and the peroxide curative are mixed together independently of the fluoroelastomer composition to form a first mixture, and the liquid fluoroelastomer and the peroxide curative are mixed together independently of the fluoroelastomer composition to form a second mixture, and then the first and second mixtures are mixed together. The method of forming a solid fluoroelastomer article comprises the steps of mixing a peroxide-curable solid fluoroelastomer with a peroxide curative agent at or about room temperature to 100 deg.F to form a first mixture; mixing a bisphenol-curable liquid fluoroelastomer with a bisphenol curative agent at or about room temperature to 100 deg.F to form a second mixture; mixing the first mixture and second mixture to form a third mixture; and curing the third mixture to activate a dual cure system incorporating a peroxide cure and a bisphenol cure, wherein the curing step is conducted at room temperature to about 350 deg.F in a time sufficient to cure the third mixture and form a solid fluoroelastomer.