General Electric Company

Jan P H Keulen

Christiaan Henricus Koevoets

Robert Hossan

Biswaroop Majumdar

Alan Joseph Oshinski

Johannes Matthijssen

Herve Cartier

Ulrich Hofmann

Antoinette Cornelia Van Bennekom

Werner Woerhle

Jasper R Bouma

Geert Tamboer

Piet J Bolluijt

Peter O Stahl

Eric Reitjens

Raja Dharmarajan

Ilse Schlosser

The above described deficiencies and drawbacks are overcome by the process for making poly(arylene ether)-polyamide compositions which comprise about 10 weight percent (wt %) to about 90 wt % poly(arylene ether), about 90 wt % to about 10 wt % polyamide, about 0.01 wt % to about 10 wt % compatibility modifier, and optionally other additives known in the art. The process comprises several components which can be employed singly or in combination, namely: utilizing resins and additives that are substantially free of gaseous oxygen (air-free; e.g. less than about 1.0 vol % oxygen preferred, and less than about 0.5 vol % oxygen especially preferred, and less than about 0.05 vol % especially preferred); melting and compounding under an atmosphere which is substantially air-free; adding up to 20 wt % of polyamide to the poly(arylene ether) before compounding; when employing an extruder with an atmospheric vent, operating with the atmospheric vent open; and performing the injection molding under an inert atmosphere.

Reduction of carbonized particles in a poly(arylene ether)-polyamide composition

The invention relates to a method of making a conductive thermoplastic composition containing at least one dispersed phase polymer with a continuous phase polymer and at least one conductivity imparting agent wherein the bulk resistivity of the composition is at least partially determined by the particle size of the dispersed phase within the continuous phase. The thermoplastic composition preferably comprises a compatibilized blend of at least one polyphenylene ether resin, at least one polyamide resin, and at least one conductivity imparting agent, and optionally, one or more of impact modifiers, stabilizers, antioxidants, lubricants, and fillers.

Conductive compositions with compositionally controlled bulk resistivity

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Ossendrecht, Netherlands

Jan P H Keulen