Patent US4096293A successfully refreshed from Google Patents.
US4096293A
Expired / Lapsed
US
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Mold and core wash
Assignee: Ashland Inc
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Filing: 1977-09-06
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Granted: 1978-06-20
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Expires: 1997-09-06
Abstract
Abstract Disclosed is a foundry core wash made of a hydrocarbon solvent, fumaric acid resin, particulated calcium aluminate and a suspending agent. The core wash has particular utility for sand cores made with an inorganic binder used in pressurized die casting.
Inventors
- 👤 Michael J. Skubon
- 👤 John J. Spiwak
- 👤 Richard F. Hanesworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:39
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
A core and mold wash comprising: (a) an organic liquid solvent in an amount of approximately 5% to 90% by weight of composition; (b) a suspending agent in an amount of 0.1% to 2% by weight of composition; (c) a wetting agent in an amount of between 0.01 and 2% by weight of composition; (d) calcium aluminate particles in an amount of between 5% and 80% by weight of composition, having an average particle size of 20 to 25 microns and no particles larger than 70 microns; (e) a hard resin which is the reaction product of fumaric acid, gum rosin, and pentaerythritol, said resin is within the ratio by weight between about .5 and about 5 parts per 100 parts of composition.
Claim 2
Dependent Claim
123 words
A core and mold wash comprising: (a) an organic liquid solvent in an amount of approximately 5% to 90% by weight of composition; (b) a suspending agent in an amount of 0.1% to 2% by weight of composition; (c) a wetting agent in an amount of between 0.01 and 2% by weight of composition; (d) calcium aluminate particles in an amount of between 5% and 80% by weight of composition, having an average particle size of 20 to 25 microns and no particles larger than 70 microns; (e) a hard resin which is the reaction product of fumaric acid, gum rosin, and pentaerythritol, said resin is within the ratio by weight between about .5 and about 5 parts per 100 parts of composition.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein said organic solvent is an aldehyde or ketone.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein said organic solvent is selected from the group consisting of 1,1,1-trichloroethane, methylene chloride and mixtures thereof.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein said organic solvent is 1,1,1-trichloroethane.
Claim 6
Dependent Claim
24 words
The composition of claim 1 comprising, in addition, about 0.1 to about 5.0 parts by weight of paraffin wax per 100 parts of composition.
Claim 7
Dependent Claim
24 words
A method of treating foundry sand cores or molds comprising coating the surfaces of said molds or cores with the composition of claim 1.
Claim 8
Dependent Claim
24 words
The method of treating foundry sand cores or molds comprising coating the surfaces of said molds or cores with the composition of claim 2.
Claim 9
Dependent Claim
24 words
A method of treating foundry sand cores and molds comprising coating the surfaces of said molds or cores with the composition of claim 3.
Claim 10
Dependent Claim
24 words
A method of treating foundry sand cores or molds comprising coating the surfaces of said molds or cores with the composition of claim 4.
Claim 11
Dependent Claim
24 words
A method of treating foundry sand cores or molds comprising coating the surfaces of said molds or cores with the composition of claim 5.
References Cited (Backward Citations)
US2534743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |