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US 4,230,775 AGranted
Polyvinyl butyral ink formulation
AssigneeE. I. Du Pont de Nemours and Company
InventorsBurton N. Derick, Robert E. Moynihan, Jon W. Wolfe
Life of this patent
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Abstract
Ink formulation based on polyvinyl butyral and useful for printing polyvinyl butyral sheeting provides both improved blocking and improved glass adhesion through increased hydroxyl content in the polyvinyl butyral of the ink formulation.
Claims1
In a printing ink comprising unplasticized polyvinyl butyral, dye and solvent, the improvement which comprises unplasticized polyvinyl butyral having a hydroxyl content of about from 29 to 35 weight percent.
Dependencies are inferred from the claim text.