Patent US3922245A successfully refreshed from Google Patents.
US3922245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wash coating for sand cores and sand molds containing a rubber polymer
Assignee: Ashland LLC
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Filing: 1974-04-26
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Granted: 1975-11-25
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Expires: 1994-04-26
Abstract
Abstract Disclosed is a wash coating composition to be applied to the surfaces of foundry sand cores and molds to reduce their deterioration from handling and exposure to atmospheric humidity. The coating comprises an organic liquid which can be a chlorinated hydrocarbon, a suspending agent which can be a clay, a vegetable gum or an amine-treated bentonite, a refractory powder which can be graphite, coke, mica, silica, alumina, magnesia, talc or zircon flour, and an organic polymer or copolymer which can be a vinyl toluene/butadiene copolymer, styrene/butadiene co-polymer, vinyl toluene/acrylate copolymer, styrene/acetylene copolymer, straight acrylates and styrene/butadiene copolymers.
Inventors
- 👤 Michael J Skubon
- 👤 John J Spiwak
- 👤 Rodney L Naro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:51
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A CORE AND MOLD WASH COMPRISING: A. AN ORGANIC LIQUID SOLVENT HAVING A KAURI-BUTANOL VALUE OF AT LEAST 36; B. A SUSPENDING AGENT; C. POWDERED REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF GRAPHITE, COKE, MICA, SILICA, ALUMINUM OXIDE, MAGNESIUM OXIDE, TALC, AND ZIRCON FLOUR; AND D. AN ORGANIC POLYMER SELECTED FROM THE GROUP CONSISTING OF VINYL TOLUENE/BUTADIENE COPOLYMER, STYRENE/BUTADIENE COPOLYMER, CINYL TOLUENE/ACRYLATE COPOLYMER, STYRENE/ACETYLENE COPOLYMERS, AND ACRYLATES, THE RATIO BY WEIGHT OF ORGANIC POLYMER TO ORGANIC LIQUID SOLVENT BEING BETWEEN ABOUT 1:50 AND ABOUT 1:200 AND THE RATIO BY WEIGHT OF POWDERED REFRACTORY TO ORGANIC LIQUID SOLVENT BEING BETWEEN ABOUT 1:2.5 AND 1:3.5.
Claim 2
Dependent Claim
104 words
A CORE AND MOLD WASH COMPRISING: A. AN ORGANIC LIQUID SOLVENT HAVING A KAURI-BUTANOL VALUE OF AT LEAST 36; B. A SUSPENDING AGENT; C. POWDERED REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF GRAPHITE, COKE, MICA, SILICA, ALUMINUM OXIDE, MAGNESIUM OXIDE, TALC, AND ZIRCON FLOUR; AND D. AN ORGANIC POLYMER SELECTED FROM THE GROUP CONSISTING OF VINYL TOLUENE/BUTADIENE COPOLYMER, STYRENE/BUTADIENE COPOLYMER, CINYL TOLUENE/ACRYLATE COPOLYMER, STYRENE/ACETYLENE COPOLYMERS, AND ACRYLATES, THE RATIO BY WEIGHT OF ORGANIC POLYMER TO ORGANIC LIQUID SOLVENT BEING BETWEEN ABOUT 1:50 AND ABOUT 1:200 AND THE RATIO BY WEIGHT OF POWDERED REFRACTORY TO ORGANIC LIQUID SOLVENT BEING BETWEEN ABOUT 1:2.5 AND 1:3.5.
Claim 3
Dependent Claim
81 words
A core and mold wash comprising: a. liquid 1, 1, 1-tricloroethane; b. a suspending agent; c. powdered refractory material seleCted from the group consisting of graphite, coke, mica, silica, aluminum oxide, magnesium oxide, talc, and zircon flour; and d. vinyl toluene/butadiene copolymer; the ratio by weight of vinyl toluene/butadiene copolymer to 1, 1, 1-trichloroethane being between about 1:50 and about 1:200 and the ratio by weight of said refractory to said 1, 1, 1-trichloroethane being between about 1:50 and about 1:200.
Claim 4
Dependent Claim
81 words
A core and mold wash comprising: a. liquid 1, 1, 1-tricloroethane; b. a suspending agent; c. powdered refractory material seleCted from the group consisting of graphite, coke, mica, silica, aluminum oxide, magnesium oxide, talc, and zircon flour; and d. vinyl toluene/butadiene copolymer; the ratio by weight of vinyl toluene/butadiene copolymer to 1, 1, 1-trichloroethane being between about 1:50 and about 1:200 and the ratio by weight of said refractory to said 1, 1, 1-trichloroethane being between about 1:50 and about 1:200.
References Cited (Backward Citations)
US3541042A
Cited
US3654190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |