US4543374A
Expired / Lapsed
US
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Furan foundry binder system containing a curing promoter
Assignee: Penn Specialty Chemicals Inc
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Filing: 1984-11-08
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Granted: 1985-09-24
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Expires: 2004-11-08
Abstract
Abstract A binder composition for foundry molds and cores comprising a furan based binder, a metal sulfonate curing catalyst therefor and a cure promoter selected from copper chloride, zinc chloride and iron chloride.
Inventors
- 👤 James E. Menting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:32
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/224; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
40 words
A binder composition adapted to be cured at a temperature of at least about 250° F. comprising a furan based binder, a metal sulfonate curing catalyst therefor and a cure promoter selected from copper chloride, zinc chloride and iron chloride.
Claim 2
Dependent Claim
40 words
A binder composition adapted to be cured at a temperature of at least about 250° F. comprising a furan based binder, a metal sulfonate curing catalyst therefor and a cure promoter selected from copper chloride, zinc chloride and iron chloride.
Claim 3
Dependent Claim
73 words
A treated core sand material capable of being formed into a predetermined shape and bound by an acid curable resin at a temperature of at least about 250° F. so as to retain a shape for use in metal founding, said treated core sand material containing core sand, a furan based binder, a metal sulfonate curing catalyst for said binder and a cure promoter selected from copper chloride, zinc chloride and iron chloride.
Claim 4
Dependent Claim
73 words
A treated core sand material capable of being formed into a predetermined shape and bound by an acid curable resin at a temperature of at least about 250° F. so as to retain a shape for use in metal founding, said treated core sand material containing core sand, a furan based binder, a metal sulfonate curing catalyst for said binder and a cure promoter selected from copper chloride, zinc chloride and iron chloride.
Claim 5
Independent Claim
56 words
A method of preparing a core sand material adapted for the production of sand shapes at a temperature of at least about 250° F. which comprises treating a core sand with a furan based binder, a metal sulfonate curing catalyst for said binder and a cure promoter selected from copper chloride, zinc chloride and iron chloride.
Claim 6
Independent Claim
56 words
A method of preparing a core sand material adapted for the production of sand shapes at a temperature of at least about 250° F. which comprises treating a core sand with a furan based binder, a metal sulfonate curing catalyst for said binder and a cure promoter selected from copper chloride, zinc chloride and iron chloride.
Claim 7
Dependent Claim
44 words
A method according to claim 3 wherein the core sand is first admixed with a metal sulfonate curing catalyst and a cure promotor selected from copper chloride, zinc chloride and iron chloride and then the treated sand is admixed with a furan based binder.
Claim 8
Independent Claim
72 words
A method of controlling the curing properties of a furan based binder used in the manufacture of sand shapes, said method including adding to the sand used to form said sand shapes a metal sulfonate curing catalyst and a curing promoter selected from copper chloride, zinc chloride and iron chloride, mixing with the treated sand a furan binder and then curing said binder at a temperature of at least about 250° F.
Claim 9
Independent Claim
72 words
A method of controlling the curing properties of a furan based binder used in the manufacture of sand shapes, said method including adding to the sand used to form said sand shapes a metal sulfonate curing catalyst and a curing promoter selected from copper chloride, zinc chloride and iron chloride, mixing with the treated sand a furan binder and then curing said binder at a temperature of at least about 250° F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |