TITLE: Method for producing metal castings.
European Patent Application EP0219032 A2

ABSTRACT:
Abstract not available for EP0219032
Abstract of corresponding document: US4633929
Metal castings having reduced residual carbon ash and surface flaws are
produced by an evaporative pattern casting process, in which an organic
foam pattern is vaporized upon contact with a molten metal leaving a
metal replica of the pattern. The organic foam used in this process
comprises a polymer formed by polymerizing CO2 with one or more oxirane
compounds.

INVENTORS:
Santangelo, Joseph Germano
Weber, James Joseph
Sinclair, Richard Glenn
Tenaglia, Richard David

APPLICATION NUMBER: EP19860113823
PUBLICATION DATE: 04/22/1987
FILING DATE: 10/06/1986

ASSIGNEE: AIR PROD & CHEM (US)
INTERNATIONAL CLASSES: B22C9/04; B22C7/02; C08J9/14; C08J9/28; (IPC1-7): B22C7/02; B22C9/04
EUROPEAN CLASSES: B22C7/02B; C08J9/14B+L69/00; C08J9/28+L69/00

FOREIGN REFERENCES:
AT234923B
3248415  Method of preparing high molecular weight polycarbonates
3942583  Lost plastic pattern for casting
3953383  Catalytic process for copolymerizing epoxy compounds with
carbon dioxide
DE1570572A1
3310507  Foamed epoxy resins
3351123  Mold and process of coating foamed pattern with refractory
filler and silicon-containing binder
3585168

OTHER REFERENCES:
FRANZ ROLL "Handbuch der Giessereitechnik" Vol. II, Part 1, 1970,
Springer-Verl AG A. WITTMOSER "Vollformgiessen" pages 787-802