US4248765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface polymerization on pigments for improved dispersibility
Assignee: Flint Ink Corp
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Filing: 1978-12-14
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Granted: 1981-02-03
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Expires: 1998-12-14
Abstract
Abstract A monomeric reactant is adsorbed on the surface of a pigment prior to its agglomeration. The subsequent addition of a polymerization initiator or second reactant produces a coated pigment of improved dispersibility, especially in chemically related polymer binder systems.
Inventors
- 👤 Arvind S. Patil
- 👤 Lowell E. Netherton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:07
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08L61/22; C08L61/24; C08F; C08F292/00; C08K; C08K9/00; C08K9/04; C09; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0008
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
A method for coating a pigment, comprising adsorbing a monomer on the surface of the pigment and thereafter polymerizing the monomer on the pigment surface by the addition thereto of a coreactant, wherein said monomer-coreactant system is selected from the group consisting of (a) urea-formaldehyde, (b) glycerol-phthalic anhydride, and (c) dicarboxylic acid-amine.
Claim 2
Independent Claim
52 words
A method for coating a pigment, comprising adsorbing a monomer on the surface of the pigment and thereafter polymerizing the monomer on the pigment surface by the addition thereto of a coreactant, wherein said monomer-coreactant system is selected from the group consisting of (a) urea-formaldehyde, (b) glycerol-phthalic anhydride, and (c) dicarboxylic acid-amine.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein said pigment is a water-based pigment.
Claim 4
Dependent Claim
50 words
The method of claim 2, wherein said monomer is adsorbed on the surface of said pigment for from about 0.25 to about 1.0 hours and thereafter the monomer is polymerized at a temperature of from about 25 to about 100 degrees centigrade for from about 0.5 to about 3.0 hours.
Claim 5
Dependent Claim
14 words
The method of claim 3, wherein said pigment is a transparent iron oxide pigment.
Claim 6
Dependent Claim
22 words
The method of claim 4, wherein said monomer is polymerized at a temperature of from about 75 to about 95 degrees centigrade.
Claim 7
Dependent Claim
12 words
The method of claim 5, wherein said monomer-coreactant system is glycerol-phthalic anhydride.
Claim 8
Dependent Claim
22 words
The method of claim 5, wherein said monomer-coreactant system is selected from the group consisting of adipic acid-hexanediamine and adipic acid-hexamethylene diamine.
Claim 9
Dependent Claim
12 words
The method of claim 5, wherein said monomer-coreactant system is stearic acid-hexanediamine.
Claim 10
Dependent Claim
11 words
The method of claim 5, wherein said monomer-coreactant system is glycerol-monomethylamine.
Claim 11
Independent Claim
35 words
A method of coating a pigment, comprising adsorbing an amine on the surface of the pigment and thereafter polymerizing the amine on the pigment surface by the addition of a monocarboxylic acid to the amine.
Claim 12
Independent Claim
35 words
A method of coating a pigment, comprising adsorbing an amine on the surface of the pigment and thereafter polymerizing the amine on the pigment surface by the addition of a monocarboxylic acid to the amine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |