# US 4,391,867 A · Polyvinyl butyral ink formulation

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- Number: US 4,391,867 A
- Document ID: US4391867A
- Status: Granted
- Kind: A
- Application number: 06/119,790
- Filed: 1980-02-08
- Granted: 1983-07-05
- Earliest claimed: 1977-12-16
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: Burton N. Derick; Robert E. Moynihan; Jon W. Wolfe
- Web page: https://patentgrep.com/patent/US4391867A

## CPC

- C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T 428/24901: including coloring matter
- Y10T 428/24942: including components having same physical characteristic in differing degree
- Y10T 428/31946: Next to second aldehyde or ketone condensation product
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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.

## Claims

### Claim 1

In a polyvinyl butyral sheet printed with an ink comprising solvent, dye and unplasticized polyvinyl butyral, the improvement wherein the unplasticized polyvinyl butyral in the ink has a hydroxyl content about from 5 to 50 percent higher than the hydroxyl content of the polyvinyl butyral sheeting.

### Claim 2

In a process for printing polyvinyl butyral sheeting by applying to the sheeting an ink comprising solvent, dye and unplasticized polyvinyl butyral, the improvement which comprises an unplasticized butyral in the ink having a hydroxyl content of about from 5 to 50 percent higher than the hydroxyl content of the polyvinyl butyral sheeting.