Patent US5087649A successfully refreshed from Google Patents.
US5087649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a dry product suitable as a paste base
Assignee: Henkel AG and Co KGaA
•
Filing: 1990-12-07
•
Granted: 1992-02-11
•
Expires: 2010-12-07
Abstract
Abstract Dry products in flake or granulate form suitable as a paste base may be obtained by drying a mixture, containing approximately 30 to 80% by weight of water, of from (a) 30 to 95% by weight of carboxymethylated and/or alkoxylated starch, (b) 3 to 40% by weight of a cellulose ether, and (c) 2 to 40% by weight of a water-dispersible polymer or water-soluble polymer, and (d) optionally, conventional additives, such as preservatives, wetting agents, fillers and the like, in a thin layer on a surface heated to 80 DEG to 200 DEG C. The dry products obtained do not undergo physical separation and are readily dispersible or self-dispersible in water.
Inventors
- 👤 Juergen Wegner
- 👤 Wolfgang Dierichs
- 👤 Werner Haller
- 👤 Johannes J. Jansen
- 👤 Anthony Capelle
- 👤 Willem Kamminga
- 👤 Jacobus Guns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:09
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/04; C08L3/08; C09; C09J; C09J103/00; C09J103/04; C09J103/08; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
201 words
A process for the production of a dry product in flake or granulate form suitable as a paste base, consisting of preparing a mixture containing approximately 30 to 80% by weight of water, said mixture consisting essentially of from (a) about 30 to about 95% by weight of carboxymethylated or alkoxylated starch, (b) about 3 to about 40% by weight of a cellulose ether, and (c) about 2 to about 40% by weight of (c) about 2 to about 40% by weight of a water-dispersible polymer or water-soluble polymer selected from the group consisting of polyvinyl acetate, polyacrylate and ethylene-vinyl acetate, to which conventional additives, such as preservatives, wetting agents, fillers and the like may be added, drying said mixture in a thin layer on a roller surface by heating to 80° to 200° C., grinding and sifting the dried mixture, and collecting a screen fraction thereof having the following particle size distribution: <0.4 mm, maximum 3% by weight, >0.4 mm and <1.0 mm, maximum 27% by weight, >1.0 mm and <1.6 mm, maximum 35% by weight, and >1.6 mm and <3.0 mm, maximum 35% by weight, to provide a product which is self-dispersible without separation of its components in water.
Claim 2
Dependent Claim
201 words
A process for the production of a dry product in flake or granulate form suitable as a paste base, consisting of preparing a mixture containing approximately 30 to 80% by weight of water, said mixture consisting essentially of from (a) about 30 to about 95% by weight of carboxymethylated or alkoxylated starch, (b) about 3 to about 40% by weight of a cellulose ether, and (c) about 2 to about 40% by weight of (c) about 2 to about 40% by weight of a water-dispersible polymer or water-soluble polymer selected from the group consisting of polyvinyl acetate, polyacrylate and ethylene-vinyl acetate, to which conventional additives, such as preservatives, wetting agents, fillers and the like may be added, drying said mixture in a thin layer on a roller surface by heating to 80° to 200° C., grinding and sifting the dried mixture, and collecting a screen fraction thereof having the following particle size distribution: <0.4 mm, maximum 3% by weight, >0.4 mm and <1.0 mm, maximum 27% by weight, >1.0 mm and <1.6 mm, maximum 35% by weight, and >1.6 mm and <3.0 mm, maximum 35% by weight, to provide a product which is self-dispersible without separation of its components in water.
Claim 3
Dependent Claim
32 words
A process as in claim 1 including drying said mixture over a period of about 2 to about 60 seconds and at a temperature of from about 100° to about 160° C.
Claim 4
Dependent Claim
18 words
A process as in claim 1 wherein said mixture is dried on rollers or on a belt dryer.
Claim 5
Dependent Claim
17 words
A process as in claim 1 including treating said carboxymethylated or alkoxylated starch with a crosslinking agent.
Claim 6
Dependent Claim
31 words
A process as in claim 1 wherein said starch has a degree of carboxymethylation of about 0.1 to about 2.0 or a degree of alkoxylation of about 0.05 to about 1.5.
Claim 7
Dependent Claim
22 words
A process as in claim 1 wherein an ethoxylated methyl cellulose, methylhydroxypropyl cellulose or carboxymethyl cellulose is used as said cellulose ether.
Claim 8
Dependent Claim
24 words
A process as in claim 1 wherein said water-soluble polymer is selected from the group consisting of polyvinyl alcohol, polyvinylpyrrolidone and polyvinyl methyl ether.
Claim 9
Dependent Claim
56 words
A process as in claim 1 wherein said starch comprises a crosslinked starch which has been reacted with chloroacetic acid or an alkali metal salt thereof to form a carboxymethylated starch having a degree of carboxymethylation of from about 0.1 to about 2.0, and said polymer and said cellulose ether are added to the reaction product.
Claim 10
Dependent Claim
10 words
A wallpaper paste prepared by the process of claim 1.
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) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |