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| Polymeric sensitizers for photopolymer composition |
| We claim: 1. A photopolymerizable composition consisting essentially of (A) at least one nongaseous ... |
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| Photopolymerizable composition containing a photosensitive donor and photoinitiating acceptor |
| OF THE INVENTION An important feature of the photoabsorbers used in the present invention is their ... |
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| Organic solvent-soluble photosensitive polyamide resin |
| We claim:
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| Aqueous ink for ink-jet printing |
| OF THE PREFERRED EMBODIMENTS The aqueous ink for ink-jet printing according to the present ... |
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| Aqueous ink composition for ink-jet recording |
| OF THE PREFERRED EMBODIMENTS An aqueous ink composition according to the present invention ... |
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| Diffusion or sublimation transfer imaging system |
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| Two-color thermosensitive recording adhesive label |
| OF THE PREFERRED EMBODIMENTS Specific examples of the piperazine derivative having the formula (I) ... |
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| Photosensitive composition with 4-azido-2'-methoxychalcone |
| An object of this invention is to provide an azide compound which has excellent solubility in a ... |
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Intaglio printing ink and method of employing the same
| Details |
Inventors: Bridger, Robert F.;
Assignee: Mobil Oil Corporation (New York, NY)
Primary Examiner: Kight, III; John
Assistant Examiner: Yarbrough; Amelia B.
Attorney, Agent or Firm: McKillop; Alexander J., Gilman; Michael G., Speciale; Charles J.
An intaglio ink composition and method of using the same for printing by the intaglio process are disclosed. The composition comprises a pigment, a vehicle composed basically of a resin and solvent, and a small amount, e.g., 0.005 to 0.5 wt.%, of an antioxidant composition consisting of a mixture of phenolic and amine antioxidants. The antioxidant composition serves to reduce the tendency of gravure ink formulations to streak during the printing process. A preferred gravure ink formulation contains a small amount of an antioxidant composition consisting of a mixture of 2,6-di-tert-butyl-4-methylphenol and 4,4'-bis(1,1,3,3-tetramethylbutylphenyl)amine. |
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DETAILED DESCRIPTION What is claimed is: 1.
In an intaglio printing ink composition which dries by evaporation of solvent comprising a resin, pigment and volatile solvent, the improvement which comprises adding to said composition a small amount of antioxidant composition consisting of a phenolic and amine antioxidant.
2.
The composition of claim 1 wherein the amount of antioxidant composition is 0.
005 to 0.
5 weight percent.
3.
The composition of claim 1 wherein the amount of antioxidant composition is 0.
025 to 0.
1 weight percent.
4.
The composition of claims 1, 2, or 3 wherein the antioxidant composition consists of 2,6-ditertiary butyl-4-methyl phenol and octylated diphenylamine.
5.
In a process for printing surfaces by an intaglio printing process using an ink composition which dries by evaporation of solvent comprising a resin, pigment and volatile solvent, the improvement of using an ink which contains a small amount of an antioxidant composition consisting of a phenolic and amine antioxidant.
6.
The process of claim 5 wherein the amount of antioxidant composition is 0.
005 to 0.
5 weight percent.
7.
The process of claim 5 wherein the amount of antioxidant composition is 0.
025 to 0.
1 weight percent.
8.
The process of claims 5, 6 or 7 wherein the antioxidant composition consists of 2,6 ditertiary butyl-4-methyl phenol and octylated diphenylamine.
Description:
CROSS REFERENCE TO RELATED APPLICATIONS This application is an improvement over commonly assigned, copending application Ser.
No.
238,284 filed Feb.
3, 1981, by V.
J.
Frilette, entitled Intaglio Printing Ink and Method of Employing Same.
BACKGROUND OF THE INVENTION Printing inks and printing methods may be broadly divided into three major classes which vary considerably in ink composition, method of application, and drying mechanism.
Typographic printing is a method of printing from raised characters or plates which are first inked and then pressed against the surface to be printed, thus transferring the ink.
The ink must have sufficient viscosity (tack) and adhesion so that it can be evenly distributed on the rollers of the press and be transferred properly from the type or printing plate to the paper or other substrate being printed
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