Elastomeric compositions containing fluoropolymer blends

a technology of fluoropolymer blends and compositions, which is applied in the direction of belts/chains/gearings, mechanical equipment, and details of gearing, etc., can solve the problems of high melting point of conventional rubber compositions and inability to be processed after the treatment,
US20070055020A1Inactive Publication Date: 2007-03-08FREUDENBERG NOK GEN PARTNERSHIP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
FREUDENBERG NOK GEN PARTNERSHIP
Publication Date
2007-03-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

Processable rubber compositions contain a vulcanized fluorocarbon elastomer dispersed in a thermoplastic matrix comprising a fully fluorinated polymer and a partially fluorinated polymer. The processing temperature is below the melting point of the fully fluorinated polymer. The compositions are made by combining a curative, uncured fluorocarbon elastomer, a fully fluorinated thermoplastic, and a partially fluorinated 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 extrusion.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is a divisional of U.S. patent application Ser. No. 10 / 813,527 filed on Mar. 30, 2004, the disclosure of which is incorporated herein by reference.INTRODUCTION

[0002] The present invention relates to fluorine containing elastomer compositions.

[0003] Cured elastomers or rubbers have a variety of physical properties useful for applications in molded articles. Among the properties are a high degree of flexibility, elasticity, and resistance to compression set. As such they find use in a variety of applications, such as seals and gaskets. Uncured elastomers or rubbers are in the form of a resin or gum. To obtain a molded article with suitable elastomeric properties, the uncured resins are crosslinked or cured with a variety of crosslinking agents.

[0004] For conventional elastomers, cure is generally carried out in a mold under conditions of temperature and pressure suitable for forming a cured or partially cured article. B...

Claims

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