Printing ink formulations
AssigneeMonsanto Company
InventorJames A. Snelgrove
Life of this patent
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Abstract
Ink formulations for use in printing polyvinyl butyral sheets are described. The formulations comprise polyvinyl formal, and polyvinyl butyral sheets printed using the formulations are found to have a reduced tendency to exhibit blocking.
Claims4
A polyvinylbutyral interlayer printed with an ink formulation comprising a dye, a solvent medium and a polyvinyl formal in an amount sufficient to reduce blocking between polyvinyl butyral sheets printed using such a formulation.
A polyvinyl butyral interlayer printed with a printing ink formulation having a Shell #3 cup viscosity of from 15 to 50 seconds and comprising from 3 to 10 percent by weight of the ink base of a polyvinyl formal having a number average molecular weight of from 15,000 to 40,000 and an acetate content of from 8 to 35 percent by weight, measured as vinyl acetate, and a hydroxyl content of from 2 to 10 percent by weight measured as vinyl alcohol.
Dependencies are inferred from the claim text.