# US 5,346,933 A · Thermoplastic/thermosettable coatings or inks for glass, ceramic and other hard surfaces

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- Number: US 5,346,933 A
- Document ID: US5346933A
- Status: Granted
- Kind: A
- Application number: 07/998,628
- Filed: 1992-12-30
- Granted: 1994-09-13
- Earliest claimed: 1992-12-30
- Assignees: Cerdec Corporation
- Inventors: Timothy A. Knell
- Web page: https://patentgrep.com/patent/US5346933A

## CPC

- C09D 11/102: containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- C08G 59/18: Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups {; e.g. general methods of curing}
- C08G 59/38: together with di-epoxy compounds
- C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- 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)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Thermoplastic/thermosettable coatings or inks for glass, ceramic or other hard surfaces are provided. The coatings comprise a blend of epoxy resins and a curing agent for the blend which provides a latency period of about 30 minutes at the screening temperature for such composition. Additional components are added to the composition depending upon the desired use. The compositions are applied to the hard surface by a high temperature screening process and heat cured on the surface.

## Claims

### Claim 1

A thermoplastic/thermosettable coating or ink composition for glass, ceramic or other hard surface which comprises
(a) a blend of epoxy resins selected from the group consisting of bisphenol A epoxy resin, bisphenol F epoxy resin, epoxy cresyl novolac resin and epoxy phenol novolac resin, the said epoxy resins having an epoxide equivalent weight of 150 to 2000 and the blend having a viscosity, determined by Brookfield HBT Viscometer at 200.degree. F. 5 RPM, in the range of 500 to 15,000 cps,
(b) a dicyandiamide curing agent for said epoxy blend which provides a latency period of about 30 minutes at a screening temperature of about 120.degree.-270.degree. F.,
(c) an adhesion promoter in an amount up to about 5% by weight of the composition,
(d) a wetting agent in an amount up to about 5% by weight of the composition, and
(e) a rheological modifier in an amount up to about 10% by weight of the composition, the melting or softening point of said composition being in the range of about 10.degree. C. to about 120.degree. C.

### Claim 2 (depends on 1)

A composition according to claim 1 whlch additionally contains at least one of the following components
(1) a pigment which is stable at the curing temperature of the composition in an amount of up to 50% by weight of the composition,
(2) a filler in an amount of up to 10% by weight of the composition,
(3) a diluent in an amount of up to 15% by weight of the composition, and
(4) a wax in an amount of up to 10% by weight of the composition.