Patent US3314449A successfully refreshed from Google Patents.
US3839265A
Expired / Lapsed
US
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Polymeric composition and method
Assignee: Wintershall Dea International AG
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Filing: 1972-02-09
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Granted: 1974-10-01
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Expires: 1992-02-09
Abstract
Abstract A molding composition which is water cured to a polyurea bound material prepared by mixing between about 90 and 99 wt. percent sand and between about 1 and 10 wt. percent of a multifunctional isocyanate bonding agent which is the product of the phosgenation of the condensation product of an aldehyde and aromatic amine or an aldehyde, aromatic amine and a phenol.
Inventors
- 👤 Stoll H Meyer
- 👤 M Lottermoser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/12; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C08G12/08; C08G12/40; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08G14/12; C08G18/28; C08G18/30; C08G18/302; C08K; C08K3/00; C08K3/34; C08K3/36
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
A MOLDING COMPOSITION CURABLE BY TREATING WITH WATER CONSISTING ESSENTIALLY OF BETWEEN ABOUT 90 AND 99 WT. % SAND AND BETWEEN 1 AND 10WT. % MULTIFUNCTIONAL ISOCYANATE BONDING AGENT PREPARED BY CONDENSING AN ALDEHYDE OF THE FORMULA RCHO WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) AN AROMATIC AMINE OF THE FORMULA:
Claim 2
Dependent Claim
54 words
A MOLDING COMPOSITION CURABLE BY TREATING WITH WATER CONSISTING ESSENTIALLY OF BETWEEN ABOUT 90 AND 99 WT. % SAND AND BETWEEN 1 AND 10WT. % MULTIFUNCTIONAL ISOCYANATE BONDING AGENT PREPARED BY CONDENSING AN ALDEHYDE OF THE FORMULA RCHO WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) AN AROMATIC AMINE OF THE FORMULA:
Claim 3
Dependent Claim
26 words
A composition in accordance with claim 1 wherein said member is (b), said aldehyde is formaldehyde, said aromatic amine is aniline, and said phenol is monohydroxybenzene.
Claim 4
Dependent Claim
22 words
A composition in accordance with claim 1 wherein said member is (a), said aromatic amine is aniline and said aldehyde is formaldehyde.
Claim 5
Independent Claim
61 words
A method for producing a solid sand mold consisting essentially of contacting with water a composition comprising between about 90 and 99 wt. % sand and between about 1 and 10 wt. % multifunctional isocyanate bonding agent prepared by condensing an aldehyde of the formula RCHO with a member selected from the group consisting of (a) aromatic amine of the formula:
Claim 6
Independent Claim
61 words
A method for producing a solid sand mold consisting essentially of contacting with water a composition comprising between about 90 and 99 wt. % sand and between about 1 and 10 wt. % multifunctional isocyanate bonding agent prepared by condensing an aldehyde of the formula RCHO with a member selected from the group consisting of (a) aromatic amine of the formula:
Claim 7
Dependent Claim
32 words
A method for producing a solid sand mold in accordance with claim 4 wherein said member is (b), said aldehyde is formaldehyde, said aromatic amine is aniline, and said phenol is monohydroxybenzene.
Claim 8
Dependent Claim
22 words
A method in accordance with claim 4 wherein said member is (a), said aromatic amine is aniline and said aldehyde is formaldehyde.
Claim 9
Dependent Claim
11 words
A solid sand mold produced by the method of claim 4.
Claim 10
Dependent Claim
11 words
A solid sand mold produced by the method of claim 5.
Claim 11
Dependent Claim
11 words
A solid sand mold produced by the method of claim 6.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |