EP 0450055 A4 19920909 - IMPROVING THE TOUGHNESS AND PROCESSIBILITY OF HIGH HEAT POLYCARBONATE COMPOSITIONS
Title (en)
IMPROVING THE TOUGHNESS AND PROCESSIBILITY OF HIGH HEAT POLYCARBONATE COMPOSITIONS
Publication
Application
Priority
US 42578589 A 19891023
Abstract (en)
[origin: WO9105823A1] 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 rubber, and a flow modifier such as an olefin/carbon monoxide copolymer, a styrenic thermoplastic resin, a polyester or a polyamide. The presence of the flow modifier in the composition reduces the viscosity of the high heat polycarbonate and thus the temperature at which it can be processed or compounded. Compounding at such lower temperature allows formation of the composition 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 perform this function.
IPC 1-7
IPC 8 full level
C08J 3/20 (2006.01); C08L 69/00 (2006.01)
CPC (source: EP)
C08L 69/00 (2013.01)
C-Set (source: EP)
Citation (search report)
- [X] EP 0385086 A2 19900905 - BAYER AG [DE]
- [X] US 4367310 A 19830104 - HENTON DAVID E
- [X] EP 0239157 A1 19870930 - GEN ELECTRIC [US]
- [X] EP 0331970 A2 19890913 - BORG WARNER CHEMICALS INC [US]
- [X] EP 0219090 A2 19870422 - BASF AG [DE]
- [X] US 4388443 A 19830614 - BOURLAND LARRY G
- [X] US 4179479 A 19791218 - CARTER RUSSELL P JR [US]
- [XP] US 4929673 A 19900529 - LAUGHNER MICHAEL K [US], et al
- See references of WO 9105823A1
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
WO 9105823 A1 19910502; AU 6718390 A 19910516; CA 2044589 A1 19910424; EP 0450055 A1 19911009; EP 0450055 A4 19920909; JP H04505776 A 19921008
DOCDB simple family (application)
US 9006127 W 19901023; AU 6718390 A 19901023; CA 2044589 A 19901023; EP 90916965 A 19901023; JP 51564690 A 19901023