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Abstract

A compatibilizing agent for polymeric blends of polycarbonates and polyamides which have improved physical and chemical resistance properties, without any substantial sacrifice of the desirable properties of the polycarbonate or polyamide. The polymeric compatibilizing agent has at least one functional group soluble in the polycarbonate and at least one functional group soluble in the polyamide, and preferably is a polymeric compatibilizing agent for blends of polycarbonate and polyamide resins, which comprises from about 10 to 90 or even 100 weight percent of a compound selected from the group consisting of a polyetherimide, a polyurethane and a linear segmented thermoplastic elastomers having an ester segment and a hard segment of semi-crystalline, partially aromatic polyamide, based on diphenylmethane diisocyanate; from about 90 to about 10 weight percent of a maleic anhydride grafted polymeric blend; from 0 to about 80 weight percent of an alloying agent; said compatibilizing agent thus having at least one functional group soluble in the polycarbonate resin and at least one functional group soluble in the polyamide resin; wherein the melting or softening point of said compatibilizing agent is no greater than the melting or softening points of the polycarbonate and polyamide resin constituents in the blend. A process for producing the polymeric blends of a polycarbonate and a polyamide is also provided.

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