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US 2004/0167270 A1Published application
Fugitive pattern for casting
OwnerDane Chang, Yunwa W. Cheung +2inventors
InventorsDane Chang, Yunwa W. Cheung, Charles F. Diehl, Joseph M. Vihtelic
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Abstract
A fugitive pattern for making a shell mold for investment casting a metal or alloy comprises a substantially random interpolymer and a low molecular weight polymer in proportions to provide a fugitive pattern having a combination of properties suitable for use in making the shell molds.
Claims37
A pattern material for making a fugitive pattern of an article to be cast of a metal or alloy, comprising;
- A) a substantially random interpolymer, and
- B) a low molecular weight polymer other than said interpolymer.
A fugitive pattern material for making a fugitive pattern of an article to be cast of a metal or alloy, comprising;
- A) ethylene/styrene interpolymer, and
- B) a low molecular weight polystyrene.
Dependencies are inferred from the claim text.