US4036652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated pigments
Assignee: Sun Chemical Corp
•
Filing: 1976-04-07
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Granted: 1977-07-19
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Expires: 1996-04-07
Abstract
Abstract Pigments may be encapsulated by a process comprising the steps of (1) mixing a high solids pigment presscake with ammonia and an ammonia-soluble resin to form a fluid mixture, (2) removing sufficient water from the mixture to form a kneadable mass, and (3) dispersing the mass under conditions of high shear to yield a finely divided encapsulated pigment presscake.
Inventors
- 👤 Jules Rothmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:50
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/10; C08; C08K; C08K9/00; C08K9/10; C09B; C09B67/00; C09B67/006; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A process for encapsulating pigments which comprises the steps of (1) mixing a high solids pigment presscake containing about 40 to 50 percent by weight of water with ammonia and an ammonia-soluble acrylic resin to form a fluid mixture, (2) removing sufficient water from the mixture to form a kneadable mass, and (3) dispersing the mass under conditions of high shear to yield a finely-divided encapsulated pigment presscake, the amount of resin being about 10 to 40 parts by weight per 100 parts by weight of pigment presscake and the amount of ammonia being about 5 to 50 parts by weight per 100 parts by weight of pigment.
Claim 2
Dependent Claim
108 words
A process for encapsulating pigments which comprises the steps of (1) mixing a high solids pigment presscake containing about 40 to 50 percent by weight of water with ammonia and an ammonia-soluble acrylic resin to form a fluid mixture, (2) removing sufficient water from the mixture to form a kneadable mass, and (3) dispersing the mass under conditions of high shear to yield a finely-divided encapsulated pigment presscake, the amount of resin being about 10 to 40 parts by weight per 100 parts by weight of pigment presscake and the amount of ammonia being about 5 to 50 parts by weight per 100 parts by weight of pigment.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the pigment is organic.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein the pigment is inorganic.
Claim 5
Dependent Claim
11 words
An encapsulated pigment presscake prepared by the process of claim 1.
Claim 6
Dependent Claim
32 words
The encapsulated pigment presscake of claim 4 which contains about 50 to 80 percent by weight of pigment, about 15 to 25 percent by weight of ammoniacal resin, and the remainder water.
References Cited (Backward Citations)
US2786822A
Cited
US3615812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |