Vegetable oil-based printing ink
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsSevim Z. Erhan, Marvin O. Bagby
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Abstract
Printing inks, which do not require any petroleum-derived component, are prepared from vegetable oils by heat bodying the oils to within a specified viscosity range. The process is easily tailored to give products having viscosity, tackiness, ruboff resistance, and color density properties which meet or exceed industry standards. The inherent light coloration of the vehicles permits formulation into colored inks having substantially reduced pigment levels.
Claims21
A printing ink formulation comprising a vehicle consisting essentially of a substantially non-oxidized heat bodied vegetable oil, said vehicle having a molecular weight in the range of about 2600-8900, a viscosity in the range of about 1.6-18 poises, and a color on the Gardner Color Scale of about 6 or less.
A method for producing a printing ink vehicle from a vegetable oil comprising the following steps:
- a. heating a vegetable oil at a temperature sufficient to produce a heat bodied, gel component having a molecular weight of at least about 15,000 under conditions which minimize oxidation and its consequent darkening effect on the oil;
- b. combining the heat bodies, gel component with a second component of vegetable oil origin;
- and
- c. recovering a printing ink vehicle characterized by a viscosity in the range of about 1.6-18 poises, and a color on the Gardner Color Scale of about 6 or less.
Dependencies are inferred from the claim text.