THERMOPLASTIC VULCANIZATE WITH FUNCTIONAL FILLERS

• Main Authors: PARK, EDWARD HOSUNG, WALKER, FRANCIS JOSEPH
• Format: Patent
• Language: English; French
• Published: 30.12.2005
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Processable rubber compositions contain a vulcanized fluorocarbon elastomer and functional filler dispersed in a matrix of a thermoplastic polymeric materia l. In one embodiment the matrix forms a continuous phase and the vulcanized elastomeri c material is in the form of particles forming a non-continuous phase. The compositions are made by combining a curative, an uncured fluorocarbon elastomer, a functional filler and a thermoplastic material, and heating the mixture at a temperature and for a time sufficient to effect vulcanization of the elastomeric material; while mechanical energy is applied to mix the mixture during the heating step. Shaped articles such as seals, gaskets, O-rings, and hoses may be readily formed from the rubber compositions according to conventional thermoplastic processes such as blow molding, injection molding, and extension.