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US4648907A
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US
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High color strength diarylide yellow pigment compositions
Assignee: BASF Corp
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Filing: 1985-04-12
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Granted: 1987-03-10
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Expires: 2005-04-12
Abstract
Abstract Improved diarylide yellow pigment compositions having high color strength. The compositions are manufactured by modifying tetrazotized 3,3'-dichlorobenzidine with a solution of about 3 to about 5 mole percent of a first acetoacetarylide, followed by coupling into a second acetoacetarylide such as acetoacetanilide.
Inventors
- 👤 Byron G. Hays
- 👤 Robert J. Stanaback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:58
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B35/10; C09B35/105; C09B67/00; C09B67/0033; C09B67/0046; C09B67/0055
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A method of manufacturing diarylide yellow pigments comprising tetrazotizing 3,3'-dichlorobenzidine, then coupling the tetrazonium salt with an acetoacetarylide, and then filtering and washing the resulting pigment, wherein the improvement comprises: modifying the tetrazotized 3,3'-dichlorobenzidine by reacting with about 3 mole % to about 5 mole % of an acetic acid solution of a first acetoacetarylide; and then coupling the modified 3,3'-dichlorobenzidine tetrazonium salt into a slurry of a second acetoacetarylide, thereby producing diarylide yellow pigment compositions having increased color strength over diarylide yellow compositions produced by conventional methods.
Claim 2
Independent Claim
88 words
A method of manufacturing diarylide yellow pigments comprising tetrazotizing 3,3'-dichlorobenzidine, then coupling the tetrazonium salt with an acetoacetarylide, and then filtering and washing the resulting pigment, wherein the improvement comprises: modifying the tetrazotized 3,3'-dichlorobenzidine by reacting with about 3 mole % to about 5 mole % of an acetic acid solution of a first acetoacetarylide; and then coupling the modified 3,3'-dichlorobenzidine tetrazonium salt into a slurry of a second acetoacetarylide, thereby producing diarylide yellow pigment compositions having increased color strength over diarylide yellow compositions produced by conventional methods.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein the first acetoacetarylide is a member of the group consisting of acetoacet-p-phenetidide (AAPP), acetroacet-p-chloranilide (AAPC), acetoacet-2,4-xylidide (AAMX), acetoacet-p-sulfoanilide (AAPSA), acetoacet-p-anisidide (AAPA), acetoacet-o-chloroanilide (AAOC) and acetoacetanilide (AAA).
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the second acetoacetarylide is acetoacetanilide.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein the acetic acid solution of acetoacetarylide has a pH of about 1 to about 2.
Claim 6
Dependent Claim
35 words
A diarylide yellow pigment composition produced by the process of claims 1, 2, 3 or 4, wherein the diarylide yellow pigment composition has increased color strength over diarylide yellow pigment compositions produced by conventional methods.
Claim 7
Dependent Claim
60 words
A printing ink of the type consisting essentially of an aliphatic ink oil, rosin-modified resin, wax, antioxidant and diarylide yellow pigment, wherein the improvement comprises a diarylide yellow pigment produced by the process of claims 1, 2, 3 or 4, wherein the printing ink has increased color strength and transparency over printing inks manufactured from conventional diarylide yellow pigment compositions.
References Cited (Backward Citations)
US3725101A
Cited
US3776749A
Cited
US3775148A
Cited
US4154618A
Cited
US4304601A
Cited
US4469515A
Cited
US4341701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |