Modified polyester composition

C - Chemistry – Metallurgy – 08 – L

Patent

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400/3015

C08L 67/02 (2006.01) C08L 33/06 (2006.01) C08L 51/04 (2006.01) C08L 69/00 (2006.01)

Patent

CA 1262584

8CU-3846 MODIFIED POLYESTER COMPOSITION ABSTRACT OF THE DISCLOSURE New and improved resin mixtures are disclosed comprising an aromatic polyester or copolyester resin; an aromatic polycarbonate resin, and a modifier combination therefor comprising an acrylate/methacrylate core-shell multiphase composite interpolymer resin and an olefinic resin selected from C1-C10 olefin homo- polymers and copolymers of an olefin and acrylic acid, methacrylic acid, or alkyl esters of such acids. The resin mixtures exhibit retailed impact resistance at room temperature and improved tensile elongation, improved processability, moldability and extrudability. In a preferred embodiment, the acrylate/methacrylate core shell copolymer resin and the olefinic resin are precompounded to form a modifier concentrate. Pre- compounding reduces the flammability hazards associated with blending rubber powders and avoids worker exposure to chemical dust. In addition, the precompounded composition is more easily and completely dispersed in the other polymeric components providing improved part appearance and better melt flow and permits a reduction in the amount of core-shell interpolymer resin employed without sacrificing important physical properties.

469642

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