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US4369265A
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Readily dispersible silicone-coated finely divided solids
Assignee: Bayer AG
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Filing: 1980-06-18
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Granted: 1983-01-18
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Expires: 2000-06-18
Abstract
Abstract Readily dispersible finely divided solids such as pigments, coated with an organo-silicone polymer of the formula ##EQU1## wherein R I , R II , R III each independently is an optionally halogenated alkyl, alkenyl or aryl radical having from 1 to 10 carbon atoms; R IV is an alkyl or alkenyl radical having from 9 to 24 carbon atom; R V is an alkyl or alkenyl radical having from 1 to 8 carbon atoms; the sum of a+b+c is from 1 to about 1.95; d is a number from about 0.2 to 2; e and f each independently is a number from 0 to 1; the sum of d+e+f is from about 0.2 to 2; and the sum of a+b+c+d+e+f is up to 3.
Inventors
- 👤 Gunter Buxbaum
- 👤 Ottfried Schlak
- 👤 Franz Hund
- 👤 Lutz Leitner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:34
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; G11B5/70647; C; C09; C09C; C09C1/00; C09C1/22; C09C1/24; C09C3/00; C09C3/12; G11B5/712; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/061; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/42; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A finely divided annealed solid coated with about 0.1 to 2% by weight of an organo-silicone polymer of the formula ##EQU4## wherein R I , R II , R III each independently is an optionally halogenated alkyl, alkenyl or alkyl radical having from 1 to 10 carbon atoms; R IV is an alkyl or alkenyl radical having from 9 to 24 carbon atoms; R V is an alkyl or alkenyl radical having from 1 to 8 carbon atoms; the sum of a+b+c is from 1 to about 1.95; d is a number from about 0.2 to 2; e and f each independently is a number from 0 to 1; the sum of d+e+f is from about 0.2 to 2; and the sum of a+b+c+d+e+f is no more than 3.
Claim 2
Dependent Claim
129 words
A finely divided annealed solid coated with about 0.1 to 2% by weight of an organo-silicone polymer of the formula ##EQU4## wherein R I , R II , R III each independently is an optionally halogenated alkyl, alkenyl or alkyl radical having from 1 to 10 carbon atoms; R IV is an alkyl or alkenyl radical having from 9 to 24 carbon atoms; R V is an alkyl or alkenyl radical having from 1 to 8 carbon atoms; the sum of a+b+c is from 1 to about 1.95; d is a number from about 0.2 to 2; e and f each independently is a number from 0 to 1; the sum of d+e+f is from about 0.2 to 2; and the sum of a+b+c+d+e+f is no more than 3.
Claim 3
Dependent Claim
71 words
A finely divided solid according to claim 1, wherein the polymer is of the formula ##EQU5## wherein R I is methyl; R II is phenyl; R V is methyl, ethyl or vinyl; the sum of a+b is from 1 to about 1.95; d is a number from about 0.5 to 1.5; e is a number from about 0.01 to 1.5; and the sum of d+e is from about 0.51 to 2.
Claim 4
Dependent Claim
57 words
A finely divided solid according to claim 1, wherein the polymer is of the formula ##EQU6## wherein R I is methyl; R V is methyl, ethyl or vinyl; d is a number from about 0.2 to 0.9; e is a number from about 0.1 to 0.8; and the sum of d+e is from about 0.3 to 1.7.
Claim 5
Dependent Claim
21 words
A finely divided solid according to claim 1, having a specific surface area of at least about 1 m 2 /g.
Claim 6
Dependent Claim
50 words
A finely divided solid according to claim 1, consisting essentially of α-Fe 2 O 3 , Fe 3 O 4 or mixed phases of Fe 2 O 3 and Fe 3 O 4 , any of which has optionally been modified with foreign ions, or of ferromegnetic metals or alloys.
Claim 7
Dependent Claim
27 words
A process for the preparation of a finely divided solid according to claim 1, comprising treating a predominantly aqueous slurry of a pigment with the organo-silicone polymer.
Claim 8
Dependent Claim
15 words
A coating, coloring or paint pigmented with a finely divided solid according to claim 1.
Claim 9
Dependent Claim
18 words
A magnetic record support, printing ink or magnetic ink containing a finely divided solid according to 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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |