US4163000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry mold composition and process for producing foundry mold
Assignee: Sekisui Chemical Co Ltd
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Filing: 1977-12-01
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Granted: 1979-07-31
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Expires: 1997-12-01
Abstract
Abstract A foundry mold composition comprising a foundry mold sand, a binder in an amount sufficient to bind the sand and less than 1 part by weight, per 100 parts by weight of the sand, of clay, said binder being an aqueous solution of a water-soluble maleic acid-type copolymer in an amount of at least 1 part by weight per 100 parts by weight of the sand, and a process for producing a foundry mold, using aforesaid composition.
Inventors
- 👤 Jiro Kashima
- 👤 Synji Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167; B22C1/20; B22C1/22; B22C1/2206
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
107 words
A foundry mold composition which comprises a foundry mold sand, a binder in an amount of at least 1 part by weight per 100 parts by weight of the sand and sufficient to bind the sand and less than 1 part by weight of clay per 100 parts by weight of the sand, said binder consisting essentially of an aqueous solution of a water-soluble copolymer of a maleic acid-type monomer selected from the group consisting of maleic acid, maleic anhydride and maleic acid esters and a styrene comonomer and water glass and having a weight ratio of copolymer solids to water glass solids of 1:0.5 to 10.
Claim 2
Dependent Claim
107 words
A foundry mold composition which comprises a foundry mold sand, a binder in an amount of at least 1 part by weight per 100 parts by weight of the sand and sufficient to bind the sand and less than 1 part by weight of clay per 100 parts by weight of the sand, said binder consisting essentially of an aqueous solution of a water-soluble copolymer of a maleic acid-type monomer selected from the group consisting of maleic acid, maleic anhydride and maleic acid esters and a styrene comonomer and water glass and having a weight ratio of copolymer solids to water glass solids of 1:0.5 to 10.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein said binder is obtained by mixing an aqueous solution of the copolymer with water glass.
Claim 4
Dependent Claim
17 words
A composition according to claim 1 which further contains an additive selected from thickeners and dissolving assistants.
Claim 5
Dependent Claim
29 words
A composition according to claim 1 wherein the amount of the binder is about 2 to about 10 parts by weight per 100 parts by weight of the sand.
Claim 6
Dependent Claim
23 words
A composition according to claim 2 wherein the aqueous solution of the copolymer has a viscosity of about 500 to about 10,000 centipoises.
Claim 7
Dependent Claim
19 words
A composition according to claim 2 wherein said binder has a viscosity of about 5 to about 3,000 centipoises.
Claim 8
Dependent Claim
44 words
A composition according to claim 4 wherein the binder further contains about 1 to about 6 parts by weight, per 100 parts by weight of the sand, of a powder of a silicon material selected from the group consisting of silicon-containing alloys and silicon.
Claim 9
Dependent Claim
23 words
A composition according to claim 7 wherein the aqueous solution of the copolymer has a viscosity of about 500 to about 10,000 centipoises.
Claim 10
Dependent Claim
30 words
A composition according to claim 7 wherein the copolymer and water glass are in the pre-mixed state with the mixture having a viscosity of about 5 to about 3,000 centipoises.
Claim 11
Dependent Claim
103 words
A process for producing a foundry mold, which comprises mixing 100 parts by weight of a foundry mold sand containing less than 1 part by weight of clay with from about 2 to about 10 parts by weight of a binder consisting essentially of water glass and an aqueous solution of a water-soluble copolymer of a maleic acid type monomer selected from the group consisting of maleic acid, maleic anhydride and maleic acid esters and a styrene comonomer and having a viscosity of about 500 to about 10,000 centipoises, forming the mixture into a mold, and contacting the mold with carbon dioxide gas.
Claim 12
Dependent Claim
103 words
A process for producing a foundry mold, which comprises mixing 100 parts by weight of a foundry mold sand containing less than 1 part by weight of clay with from about 2 to about 10 parts by weight of a binder consisting essentially of water glass and an aqueous solution of a water-soluble copolymer of a maleic acid type monomer selected from the group consisting of maleic acid, maleic anhydride and maleic acid esters and a styrene comonomer and having a viscosity of about 500 to about 10,000 centipoises, forming the mixture into a mold, and contacting the mold with carbon dioxide gas.
Claim 13
Dependent Claim
125 words
A process for producing a foundry mold, which comprises mixing 100 parts by weight of a foundry mold sand containing less than 1 part by weight of clay with about 2 to 10 parts by weight of a binder consisting essentially of water glass and an aqueous solution of a water-soluble copolymer of a maleic acid type monomer selected from the group consisting of maleic acid, maleic anhydride and maleic acid esters and a styrene comonomer and having a viscosity of about 500 to about 10,000 centipoises and about 1 to about 6 parts by weight of a powder of a silicon material selected from the group consisting of silicon-containing alloys and silicon, forming the mixture into a mold, and drying it under self-generated heat.
Claim 14
Dependent Claim
125 words
A process for producing a foundry mold, which comprises mixing 100 parts by weight of a foundry mold sand containing less than 1 part by weight of clay with about 2 to 10 parts by weight of a binder consisting essentially of water glass and an aqueous solution of a water-soluble copolymer of a maleic acid type monomer selected from the group consisting of maleic acid, maleic anhydride and maleic acid esters and a styrene comonomer and having a viscosity of about 500 to about 10,000 centipoises and about 1 to about 6 parts by weight of a powder of a silicon material selected from the group consisting of silicon-containing alloys and silicon, forming the mixture into a mold, and drying it under self-generated heat.
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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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |