US3876572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized microcapsule dispersions
Assignee: BASF SE
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Filing: 1973-04-04
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Granted: 1975-04-08
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Expires: 1993-04-04
Abstract
Abstract Microcapsule dispersions which have been stabilized with a crosslinked polymer containing carboxyl groups. The physical and chemical properties of the dispersions remain substantially constant while settling and creaming of the dispersed microcapsules are prevented.
Inventors
- 👤 Wolfgang Sliwka
- 👤 Rudolf Bachmann
- 👤 Guenther Baum
- 👤 Dieter Ludsteck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:27
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/025; B41; B41M; B41M5/00; B41M5/124; B41M5/165
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
A MICROCAPSULE DISPERSION HAVING STABLE DISTRIBUTION WHEREIN THE AQUEOUS CARRIER LIQUID CONTAINS DISSOLVED IN IT A PARTLY CROSS-LENGTH POLYMER CONTAINING CARBOXYL GROUPS AND WHEREIN SAID PARTLY CROSS-LINKED POLYMER IS A HOMOPOLYMER OR COPOLYMER OF (A) 10 TO 100% BY WEIGHT OF UNSATURATED MONOCARBOXYLIC OR DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, MALEIC ACID, FUMARIC ACID, ITACONIC ACID, CROTONIC ACID, HEMIESTERS OF MALEIC ACID AND HEMIESTERS OF FUMARIC ACID, AND (B) 90 TO 0% BY WEIGHT OF COPOLYMERIZABLE OLEFINICALLY UNSATURATED COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ESTERS WITH ALCOHOLS OF ONE TO FOUR CARBON ATOMS, VINYSULFONIC ACIDS, SALTS OF VINYLSULFONIC ACID, 2-SULFOETHYLMETHACRYLATE, ACRYLAMIDE AND VINYLPYRROLIODONE WHICH WAS CROSSLINKED BY ACTIVE IRRADIATION OR BY COPOLYMERIZATION OF (A) AND (B) WITH (C) 0.01 TO 5% BY WEIGHT OF WITH REFERENCE TO (A) AND (B) OF A POLYFUNCTIONAL MONOMER SELECTED FROM THE GROUP CONSISTING OF ETHYLENEBISACRYLAMIDE, TRIACRYLYLTRIAZINE, TRIALLYLCYANURATE, BUTANEDIOL DIACRYLATE, ETHYLENE GLYCOL DIACRYLATE, DIVINYLSULFONE, BISDIALLYL MALEATE, DIVINYLBENZOL, VINYLACRYLATE, DIALLYL PHTHALATE, POLYALLYLSUCROSE, AND DIVINYLDIOXANE.
Claim 2
Dependent Claim
168 words
A MICROCAPSULE DISPERSION HAVING STABLE DISTRIBUTION WHEREIN THE AQUEOUS CARRIER LIQUID CONTAINS DISSOLVED IN IT A PARTLY CROSS-LENGTH POLYMER CONTAINING CARBOXYL GROUPS AND WHEREIN SAID PARTLY CROSS-LINKED POLYMER IS A HOMOPOLYMER OR COPOLYMER OF (A) 10 TO 100% BY WEIGHT OF UNSATURATED MONOCARBOXYLIC OR DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, MALEIC ACID, FUMARIC ACID, ITACONIC ACID, CROTONIC ACID, HEMIESTERS OF MALEIC ACID AND HEMIESTERS OF FUMARIC ACID, AND (B) 90 TO 0% BY WEIGHT OF COPOLYMERIZABLE OLEFINICALLY UNSATURATED COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ESTERS WITH ALCOHOLS OF ONE TO FOUR CARBON ATOMS, VINYSULFONIC ACIDS, SALTS OF VINYLSULFONIC ACID, 2-SULFOETHYLMETHACRYLATE, ACRYLAMIDE AND VINYLPYRROLIODONE WHICH WAS CROSSLINKED BY ACTIVE IRRADIATION OR BY COPOLYMERIZATION OF (A) AND (B) WITH (C) 0.01 TO 5% BY WEIGHT OF WITH REFERENCE TO (A) AND (B) OF A POLYFUNCTIONAL MONOMER SELECTED FROM THE GROUP CONSISTING OF ETHYLENEBISACRYLAMIDE, TRIACRYLYLTRIAZINE, TRIALLYLCYANURATE, BUTANEDIOL DIACRYLATE, ETHYLENE GLYCOL DIACRYLATE, DIVINYLSULFONE, BISDIALLYL MALEATE, DIVINYLBENZOL, VINYLACRYLATE, DIALLYL PHTHALATE, POLYALLYLSUCROSE, AND DIVINYLDIOXANE.
Claim 3
Dependent Claim
46 words
A microcapsule dispersion as claimed in claim 1, wherein said partly crosslinked polymer is a copolymer of 30 to 100% by weight of (a), 70 to 0% by weight of (b), and 0.1 to 3% by weight of (c) , with reference to (a) and (b).
Claim 4
Dependent Claim
24 words
A microcapsule dispersion as claimed in claim 1 wherein the partly crosslinked polymer containing carboxyl groups is a copolymer of acrylic acid and divinyldioxane.
Claim 5
Dependent Claim
24 words
A microcapsule dispersion as claimed in claim 1 wherein the partly crosslinked polymer containing carboxyl groups is a copolymer of acrylic acid and polyallylsucrose.
Claim 6
Dependent Claim
30 words
A microcapsule dispersion as claimed in claim 1 wherein the partly crosslinked polymer containing carboxyl groups is a copolymer of acrylamide, methacrylic acid, acrylic acid, vinylsulfonic acid and diallyl phthalate.
Claim 7
Dependent Claim
16 words
A microcapsule dispersion as claimed in claim 1 having a pH of from 6 to 8.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |