General Electric Company

Gary A Mellinger

Fred F Holub

Harold F Giles, Jr

Eugene G Banucci

William R Schlich

Disclosed are blends of (a) a polyetherimide and (b) a thermoplastic polycarbonate. The blends exhibit a higher heat distortion temperature and an improved flexural strength and tensile strength over the polycarbonate component alone and have a higher impact strength than that associated with the polyetherimide component of the blends. In addition, the blends may exhibit good flame resistance.

Polyetherimide-polycarbonate blends

Copolymers of etherimides and amides have been found to be useful in the coating and molding arts.

Copolymers of etherimides and amides

Copolymers of etherimides and amideimides have been found to be useful in the coating and molding arts.

Copolymers of etherimides and amideimides

Blends of polyetherimides and polyamideimides have been found to be useful in the coating and molding arts.

Blends of polyetherimides and polyamideimides

An improved extrusion melt polymerization method for continuously making polyetherimides is disclosed wherein a mixture of an organic diamine and an aromatic bis(ether anhydride) is continuously fed through an inlet opening into a screw extruder having a second opening downstream from the inlet opening. The mixture is passed through a first extruder zone maintained at a low temperature to a zone where the mixture is melted and water of reaction is continuously removed through the second opening. A melt seal may be employed between the second opening and a third opening through which water of reaction may be removed under vacuum.

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Louisville, KY, United States of America

Gary A Mellinger