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US4654082A
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US
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Antioxidant gravure printing inks and process of employing the same
Assignee: Mobil Oil AS
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Filing: 1985-04-08
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Granted: 1987-03-31
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Expires: 2005-04-08
Abstract
Abstract A gravure ink composition and method of using the same for printing by the gravure process are disclosed. The composition comprises a pigment, a vehicle composed basically of a resin and solvent, and a small amount, e.g., 0.0002 to 1 wt. %, of an antioxidant. The antioxidant serves as a means for reducing the tendency of gravure ink formulations to streak during the printing process, particularly during high-speed printing operations. A preferred gravure ink formulation contains a small amount of an antioxidant such as 2,6-di-tert-butyl-4-methylphenol or 4,4'-bis(1,1,3,3-tetramethylbutylphenyl)amine.
Inventors
- 👤 Vincent J. Frilette
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; C09D11/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 words
A rotogravure printing ink composition that dries by evaporation of solvent, said composition comprising a pigment dispersed in a fluid vehicle, said vehicle comprising rosin and/or a modified rosin dissolved in a volatile solvent consisting essentially of hydrocarbons, oxygenated compounds, and mixtures thereof, each of which at atmospheric pressure has a boiling point below about 150° C., and about 0.0002 to about 1.0 weight percent antioxidant, said amount being effective to reduce the tendency of said ink to form undesirable streaks on the printed image when said ink is fed from printing fountain maintained at about ambient temperature.
Claim 2
Dependent Claim
98 words
A rotogravure printing ink composition that dries by evaporation of solvent, said composition comprising a pigment dispersed in a fluid vehicle, said vehicle comprising rosin and/or a modified rosin dissolved in a volatile solvent consisting essentially of hydrocarbons, oxygenated compounds, and mixtures thereof, each of which at atmospheric pressure has a boiling point below about 150° C., and about 0.0002 to about 1.0 weight percent antioxidant, said amount being effective to reduce the tendency of said ink to form undesirable streaks on the printed image when said ink is fed from printing fountain maintained at about ambient temperature.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said pigment is cyan.
Claim 4
Dependent Claim
10 words
The composition of claim 1 wherein said pigment is magenta.
Claim 5
Dependent Claim
10 words
The composition of claim 1 wherein said pigment is yellow.
Claim 6
Dependent Claim
10 words
The composition of claim 1 wherein said pigment is black.
Claim 7
Dependent Claim
22 words
The composition of claim 1 wherein said antioxidant is selected from the group consisting of 2,6 ditertiary butly-4-methyl phenol and octylated diphenylamine.
Claim 8
Dependent Claim
110 words
In a process for rotogravure printing by applying at about ambient temperature an ink composition that dries by evaporation of solvent, the improvement, whereby reducing the tendency of said ink to form streaks, which comprises: using an ink comprising a pigment dispersed in a fluid vehicle, said vehicle comprising rosin and/or a modified rosin dissolved in a volatile solvent consisting essentially of hydrocarbons, oxygenated compounds, and mixtures therof, each of which at atomospheric pressure has a boiling point below about 150° C., and about 0.0002 to about 1.0 weight percent antioxidant, said amount being effective to reduce the tendency of said ink to form undesirable streaks on the printed image.
Claim 9
Dependent Claim
110 words
In a process for rotogravure printing by applying at about ambient temperature an ink composition that dries by evaporation of solvent, the improvement, whereby reducing the tendency of said ink to form streaks, which comprises: using an ink comprising a pigment dispersed in a fluid vehicle, said vehicle comprising rosin and/or a modified rosin dissolved in a volatile solvent consisting essentially of hydrocarbons, oxygenated compounds, and mixtures therof, each of which at atomospheric pressure has a boiling point below about 150° C., and about 0.0002 to about 1.0 weight percent antioxidant, said amount being effective to reduce the tendency of said ink to form undesirable streaks on the printed image.
Claim 10
Dependent Claim
19 words
The process described in claim 7 wherein said amount of antioxidant is about 0.001 to about 0.5 weight percent.
Claim 11
Dependent Claim
21 words
The process described in claim 8 wherein said pigment is selected from the group consisting of black cyan, magenta and yellow.
Claim 12
Dependent Claim
20 words
The process described in claim 7 wherein said rotogravure printing is over printing done on paper bearing a printed image.
Claim 13
Dependent Claim
20 words
The process described in claim 9 wherein said rotogravure printing is over printing done on paper bearing a printed image.
Claim 14
Dependent Claim
17 words
The process described in claim 7 wherein said antioxidant is 2,6 ditertiary butyl-4-methyl phenol or octylated diphenylamine.
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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |