C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 69/00 (2006.01)
Patent
CA 2044589
(57) Abstract Compositions of polycarbonate having good resistance to thermal deformation, good impact resistance and reduced notch sensitivity are formed from a high heat polycarbonate, an elastomeric toughening agent such as a thermoplastic or core-shell rub- ber, and a flow modifier such as an olefin/carbon monoxide copolymer, a styrenic thermoplastic resin, a polyester or a polya- mide. The presence of the flow modifier in the composition reduces the viscosity of the high heat polycarbonate and thus the tem- perature at which it can be processed or compounded. Compounding at such lower temperature allows formation of the composi- tion at a temperature which is low enough that the toughening agent will not be degraded. The flow modifier should be added to the composition no later than the addition of the toughening agent so that there is an opportunity for the flow modifier to per- form this function.
Chou Chai-Jing
Farah Hani
Herron Brenda N.
Marks Maurice J.
Osby John
Chou Chai-Jing
Farah Hani
Herron Brenda N.
Marks Maurice J.
Osby John
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