EP 1036610 B1 20050831 - Investment and mould casting in carbon and organic aerogels
Title (en)
Investment and mould casting in carbon and organic aerogels
Title (de)
Fein- und Formguss in Kunststoff/Kohlenstoffaerogelen
Title (fr)
Moulage de précision et en châssis dans des aérogels organiques ou en carbone
Publication
Application
Priority
DE 19911847 A 19990317
Abstract (en)
[origin: EP1036610A1] Open-pored aerogel mold material is obtained by sol-gel polymerization e.g., resorcinol/formaldehyde with a polymerization catalyst such as ammonium or sodium carbonate, followed by complete or partial pyrolysis of the resultant aerogel. Fillers, e.g. aluminum oxide, titanium oxide, quartz, polystyrene particles, carbon or silicon carbide fibers can be added. Independent claims are also included for the following precision casting processes for metals or alloys: (a) a wax mold is coated with a sol of suitable composition and a catalyst and converted to a gel at a temperature below the melting point of the wax. The process is repeated to build up the mold, after which the gel is dried. The temperature is then raised to melt or burn out the wax; (b) a wax pattern is placed in a container which is then filled with the synthetic sol and heated to below the wax melting point. The resultant gel is dried and the temperature raised to melt or burn out the wax.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
B22C 1/00 (2013.01 - EP US); B22C 1/165 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 1036610 A1 20000920; EP 1036610 B1 20050831; AT E303214 T1 20050915; DE 19911847 A1 20000928; DE 50011046 D1 20051006; US 2003212152 A1 20031113; US 6599953 B1 20030729; US 6887915 B2 20050503
DOCDB simple family (application)
EP 00104214 A 20000301; AT 00104214 T 20000301; DE 19911847 A 19990317; DE 50011046 T 20000301; US 44979403 A 20030530; US 52780900 A 20000317