Thermoplastic composition with improved low temperature ductility
AssigneeSabic Innovative Plastics IP B.V.
InventorsSHREYAS CHAKRAVARTI, BERNARDUS ANTONIUS GERARDUS SCHRAUWEN, ROBERT DIRK VAN DE GRAMPEL, SUNG DUG KIM
Life of this patent
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Abstract
Specific thermoplastic compositions containing a polyester or a blend of polyester and polycarbonate, an impact modifier and a block copolyestercarbonate are provided that remain ductile at or below freezing exhibiting an impact energy at or below 0° C. of greater than 25 kjoules/m2.
Claims35
A thermoplastic composition having improved low temperature impact performance comprising the following and any reaction products thereof:
- a) from 3 to 50 weight percent of at least one block copolyestercarbonate comprising organic carbonate blocks alternating with arylate blocks, said arylate blocks comprising structural units derived from at least one 1,3-dihydroxybenzene moiety and at least one aromatic dicarboxylic acid;
- b) from 4 to 16 weight percent of at least one impact modifier;
- and
- c) from 34 to 93 weight percent of at least one polyester or a blend of at least one polyester and at least one polycarbonate;
- wherein the thermoplastic composition is ductile at 0° C. or below and the thermoplastic composition exhibits a lower ductile to brittle transition temperature as compared to a second thermoplastic composition that does not contain the at least one block copolyestercarbonate comprising organic carbonate blocks alternating with arylate blocks.
A thermoplastic composition having improved low temperature impact performance comprising the following and any reaction products thereof:
- a) from 3 to 50 weight percent of at least one block copolyestercarbonate comprising organic carbonate blocks alternating with arylate blocks, said arylate blocks comprising structural units derived from at least one 1,3-dihydroxybenzene moiety and at least one aromatic dicarboxylic acid;
- b) from 4 to 16 weight percent of at least one impact modifier;
- and
- c) from 34 to 93 weight percent of at least one polyester or a blend of at least one polyester and at least one polycarbonate;
- wherein a ductile to brittle transition temperature of the thermoplastic composition is decreased by at least five degrees as compared to a second thermoplastic composition comprising (i) the at least one block copolyestercarbonate and (ii) the at least one polyester or the blend, and not comprising the at least one impact modifier.
A thermoplastic composition having improved low temperature impact performance comprising the following and any reaction products thereof:
- a) from 3 to 50 weight percent of at least one block copolyestercarbonate comprising organic carbonate blocks alternating with arylate blocks, said arylate blocks comprising structural units derived from at least one 1,3-dihydroxybenzene moiety and at least one aromatic dicarboxylic acid;
- b) from 4 to 16 weight percent of at least one impact modifier;
- and
- c) from 34 to 93 weight percent of at least one polyester selected from the group consisting of poly(1,4-butylene terephthalate) and poly(cyclohexanedimethanol-co-ethylene terephthalate) or a blend of the at least one polyester and at least one polycarbonate;
- wherein the thermoplastic composition is ductile at 0° C. or below.
Dependencies are inferred from the claim text.