US4859247A
Expired / Lapsed
US
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Low viscosity, highly concentrated pigment dispersions and method of making same
Assignee: BASF Corp
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Filing: 1987-11-02
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Granted: 1989-08-22
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Expires: 2007-11-02
Abstract
Abstract An oil-soluble viscosity-reducing additive made by combining an amine and a polybasic organic acid permits the incorporation of large proportions of pigment into pigment dispersions. The increased proportion of pigment provides advantages in the manfacture of inks.
Inventors
- 👤 Thomas E. Foye
- 👤 Joseph P. Baillargeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/003; C09B; C09B67/00; C09B67/006; C09B67/0071
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
82 words
An oil-based pigment dispersion comprising: (a) at least 20 percent pigment by weight of dispersion; and (b) at least 35 percent carrier by weight of dispersion, wherein the carrier is a hydrophobic organic vehicle; and (c) at least 1.0 percent oil-soluble additive by weight of pigment, wherein the oil-soluble additive is a reaction product of an oil-soluble, long chain aliphatic amine having a molecular weight between 80 and 340 and a polybasic organic acid having a molecular weight between 50 and 250.
Claim 2
Dependent Claim
82 words
An oil-based pigment dispersion comprising: (a) at least 20 percent pigment by weight of dispersion; and (b) at least 35 percent carrier by weight of dispersion, wherein the carrier is a hydrophobic organic vehicle; and (c) at least 1.0 percent oil-soluble additive by weight of pigment, wherein the oil-soluble additive is a reaction product of an oil-soluble, long chain aliphatic amine having a molecular weight between 80 and 340 and a polybasic organic acid having a molecular weight between 50 and 250.
Claim 3
Dependent Claim
15 words
A pgiment dispersion as described in claim 1 wherein the pigment is an organic pigment.
Claim 4
Dependent Claim
14 words
The pigment dipsperion as described in claim 2 wherein the additive is a salt.
Claim 5
Dependent Claim
14 words
The pigment dispersion as described in claim 3 wherein the acid is adipic acid.
Claim 6
Dependent Claim
20 words
The pigment dispersion as described in claim 4 wherein the amine is an alkylamine having a C-18 average chain length.
Claim 7
Dependent Claim
23 words
The pigment dispersion as described in claim 3 wherein the dispersion comprises between 1 percent and 10 percrent, by weight of pigment, additive.
Claim 8
Dependent Claim
14 words
The pigment dispersion as described in claim 6 wherein the acid is adipic acid.
Claim 9
Dependent Claim
20 words
The pigment dispersion as described in claim 7 wherein the amine is an alkylamine having a C-18 average chain length.
Claim 10
Dependent Claim
25 words
The pigment dispersion as described in claim 8 wherein the dispersion comprises between 20 percent and 60 percent, based on weight of dispersion, of pigment.
Claim 11
Dependent Claim
67 words
The pigment dispersion as described in claim 1, wherein the dispersion has a viscosity at 40° C. of between 1,000 and 6,000 poise at 0.5 sec -1 and a yield value at 0.05 sec - 1 of between 200 and 1000 dynes/cm - 2, wherein the pigment dispersion further comprises at least 30 percent, by weight of dispersion, of pigment, and wherein the additive is a salt.
Claim 12
Dependent Claim
16 words
A pigment dispersion as described in claim 10 wherein the pigment comprises a Lithol Rubine pigment.
Claim 13
Dependent Claim
16 words
A pigment dispersion as described in claim 10 wherein the pigment comprises a Diarylide Yellow pigment.
Claim 14
Dependent Claim
23 words
The pigment dispersion as described in claim 10, wherein the dispersion comprises between 1 percent and 8 percent, by weight of pigment, additive.
Claim 15
Dependent Claim
14 words
The pigment dispersion as described in claim 10 wherein the acid is adipic acid.
Claim 16
Dependent Claim
25 words
The pigment dispersion as described in claim 14 wherein the dispersion further comprises between 30 percent and 55 percent, by weight of dispersion, of pigment.
Claim 17
Independent Claim
60 words
A method of making an oil-based pigment dispersion comprising adding to the dispersion between 1.0 percent and 10 percent oil-soluble additive by weight of pigment, wherein the oil-soluble additive is a reaction product of an oil-soluble, long-chain aliphatic amine having a molecular weight between 80 and 340, and a polybasic organic acid having a molecular weight between 50 and 250.
Claim 18
Independent Claim
60 words
A method of making an oil-based pigment dispersion comprising adding to the dispersion between 1.0 percent and 10 percent oil-soluble additive by weight of pigment, wherein the oil-soluble additive is a reaction product of an oil-soluble, long-chain aliphatic amine having a molecular weight between 80 and 340, and a polybasic organic acid having a molecular weight between 50 and 250.
Claim 19
Dependent Claim
14 words
A method as described in claim 16 wherein the pigment is an organic pigment.
Claim 20
Dependent Claim
19 words
The method as described in claim 16 wherein the additive is a salt of the amine and the acid.
Claim 21
Dependent Claim
13 words
The method as desribed in claim 18 wherein the acid is adipic acid.
Claim 22
Dependent Claim
19 words
The method as described in claim 19 wherein the amine is an alkylamine having a C-18 average chain length.
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) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |