Sabic Global Technologies B.v.

Kelly Leung

Daniel Francis Lowery

Malvika Bihari

Sarah E Grieshaber

Vikram K Daga

A polyetherimide composition includes specific amounts of a polyetherimide, a block polyestercarbonate, a block poly-carbonate-polysiloxane, and a core-shell impact modifier in which the core includes a polysiloxane and the shell includes a poly(alkyl (meth)acrylate). Relative to a corresponding composition lacking the core-shell impact modifier, the polyetherimide composition exhibits increased impact strength while substantially retaining flame retardancy. Also described are associated articles, including articles formed by additive manufacturing, and a method of additive manufacturing.

Polyetherimide composition and associated article and additive manufacturing method

A thermoplastic composition is described herein including a first polyetherimide sulfone having a glass transition temperature of 250 to 290&#xb0; C., and a second polyetherimide sulfone having a glass transition temperature of 230 to 249&#xb0; C. The composition has an advantageous combination of optical properties including improved yellowness index, transmission, and haze. A method of manufacturing the thermoplastic composition and articles including the thermoplastic composition are also described. A method for improving the optical properties of a thermoplastic composition is also disclosed, where the method includes melt mixing the first and second polyetherimide sulfones, each having a glass transition temperature as defined herein. The method provides a composition having at least one of improved yellowness, haze, and transmission.

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Mount Vernon, IN, United States of America

Kelly Leung