US4196114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing resin-coated foundry sand
Assignee: Sumitomo Durez Co Ltd
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Filing: 1977-12-29
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Granted: 1980-04-01
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Expires: 1997-12-29
Abstract
Abstract A lubricant-containing binder for the dry hot coat foundry method comprising a solid resol type phenolic resin and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin.
Inventors
- 👤 Kyohei Funabiki
- 👤 Noriaki Matsushima
- 👤 Naomitsu Inouye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:39
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253; C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A process for producing resin-coated sand for use in a shell mold which comprises coating heated sand particles with a lubricant containing binder comprising a solid resol type phenolic resin produced by the reaction comprising condensation of reactants consisting of a phenol and a formaldehyde source followed by dehydration of the reaction mixture, and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin, wherein said lubricant is added prior to or during the course of the reaction to produce said solid resol type phenolic resin.
Claim 2
Dependent Claim
95 words
A process for producing resin-coated sand for use in a shell mold which comprises coating heated sand particles with a lubricant containing binder comprising a solid resol type phenolic resin produced by the reaction comprising condensation of reactants consisting of a phenol and a formaldehyde source followed by dehydration of the reaction mixture, and a lubricant in an amount of about 0.5 to 10 percent by weight with respect to said phenolic resin, wherein said lubricant is added prior to or during the course of the reaction to produce said solid resol type phenolic resin.
Claim 3
Dependent Claim
38 words
A process for producing resin-coated sand according to claim 1 wherein said lubricant-containing solid resol type phenolic resin is prepared by adding a dispersion of a lubricant during the course of reaction of said resol type phenolic resin.
Claim 4
Dependent Claim
25 words
A process for producing resin-coated sand according to claim 2 wherein said lubricant is ethylene bis-stearyl amide, methylene bis-stearyl amide, oxystearyl amide or stearyl amide.
Claim 5
Dependent Claim
16 words
A process for producing resin-coated sand according to claim 2 wherein said lubricant is polyethylene wax.
Claim 6
Dependent Claim
35 words
A process for producing resin-coated sand according to claim 4 wherein said lubricant is employed in an amount of about 0.5 to 10 percent by weight with respect to said solid resol type phenolic resin.
Claim 7
Dependent Claim
34 words
A process for producing resin-coated sand according to claim 5 wherein the reaction catalyst for said lubricant-containing solid resol type phenolic resin is a combination of an amine catalyst and an alkali metal catalyst.
Claim 8
Dependent Claim
11 words
A foundry sand composition produced by the process of claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |