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US 4,104,219 AGranted
Printing ink
AssigneeAlkor GmbH Kunststoffverkauf
InventorsVictor Peters, Franz Krammer
Life of this patent
Estimating the term…
Abstract
Plastic webs, including webs of rigid and plasticized PVC, can be printed at high speed on conventional rotogravure presses with an ink whose vehicle consists of polyalkyl acrylate and polyalkyl methacrylate binder dispersed in a homogeneous, aqueous solvent in a weight ratio of 100:3 and 100:25. The imprints adhere well and resist abrasion.
Claims6
A printing ink consisting essentially of 70% to 95% by weight of a varnish and 30% to 5% by weight of a pigment stock;
- said varnish consisting essentially of 10% to 30% by weight of an aqueous dispersion of a polyacrylic acid ester, 1.5% to 4.5% of an aqueous dispersion of a polymethacrylic acid ester, and the remainder of a liquid medium consisting of a homogeneous, neutral to slightly alkaline mixture of a minor amount of water and a major amount of an alkanol having 1 to 3 carbon atoms;
- said pigment stock consisting essentially of 30% to 55% by weight of an aqueous dispersion of said polyacrylic acid ester, 5% to 20% by weight of a pigment and the remainder of said liquid medium;
- wherein the amount of said polymethacrylic acid ester in said printing ink is between 3% and 25% of the weight of said polyacrylic acid ester in said printing ink, and wherein the alcohol moieties of said esters are alkyl or cycloalkyl having 1 to 8 carbon atoms.
Dependencies are inferred from the claim text.