Patent US4452905A successfully refreshed from Google Patents.
US4452905A
Expired / Lapsed
US
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Aqueous preparation and its use for the preparation of ceramic masses
Assignee: Bayer AG
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Filing: 1982-12-10
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Granted: 1984-06-05
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Expires: 2002-12-10
Abstract
Abstract An aqueous preparations of a gel-like consistency, containing (A) 1-15% by weight of hydrophilic polyurethanes, (B) optionally up to 3% by weight of hydrophilic polymers which are water-soluble or capable of swelling in water, based on unsaturated monomers and/or modified cellulose derivatives, (C) optionally up to 2% by weight of surface active agents, (D) optionally up to 30% by weight of powder, and (E) 0.3-30% by weight of oil. The aqueous preparation is useful as a porosifying agent in the production of porous ceramic bodies.
Inventors
- 👤 Franz Drinkuth
- 👤 Wulf von Bonin
- 👤 Dietmar Schapel
- 👤 Artur Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:02
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08L75/08; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/01; C08L1/00; C08L29/00; C08L29/02; C08L29/04; C08L3/00; C08L5/00; C08L89/00; C08L91/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
Aqueous preparations of a gel-like consistency, containing (A) 1-15% by weight of hydrophilic polyurethanes, (B) optionally up to 3% by weight of hydrophilic polymers which are water-soluble or capable of swelling in water, based on unsaturated monomers and/or modified cellulose derivatives, (C) optionally up to 2% by weight of surface active agents, (D) optionally up to 30% by weight of powder, and (E) 0.3-30% by weight of oil.
Claim 2
Dependent Claim
68 words
Aqueous preparations of a gel-like consistency, containing (A) 1-15% by weight of hydrophilic polyurethanes, (B) optionally up to 3% by weight of hydrophilic polymers which are water-soluble or capable of swelling in water, based on unsaturated monomers and/or modified cellulose derivatives, (C) optionally up to 2% by weight of surface active agents, (D) optionally up to 30% by weight of powder, and (E) 0.3-30% by weight of oil.
Claim 3
Dependent Claim
15 words
Ceramic mass containing about 5-50% by weight of an aqueous preparation according to claim 1.
Claim 4
Dependent Claim
62 words
In the production of porous ceramic bodies which comprises adding and admixing a porosifying agent to a raw ceramic mixture, molding the admixture into a desired shape, drying and burning the shaped article to the desired ceramic body, the improvement which comprises said porosifying agent being an aqueous preparation according to claim 1 in an amount of 5 to 50% by weight.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |