Decorative coating composition for coating glassware

• US 4,041,194 A
• Filed: 09/29/1975
• Issued: 08/09/1977
• Est. Priority Date: 09/29/1975
• Status: Expired due to Term

• Current Assignee: Hercules Incorporated (Ashland Global Holdings, Inc.)
• Original Assignee: Hercules Incorporated (Ashland Global Holdings, Inc.)
• Inventors: Jenkins, Kennedy A.
• Primary Examiner(s): Kendall, Ralph S.
• Assistant Examiner(s): Smith, John D.
• Application Number:
  US05/617,608
• Time in Patent Office: 680 Days
• Field of Search: 260/28.5 A, 260/33.4 R, 260/33.4 PQ, 260/42.43, 260/33.2 R, 427/226, 427/269, 427/279, 427/416, 427/197, 427/385 A, 428/35, 428/204, 428/441, 106/27, 106/29, 106/30
• US Class Current: 427/226
• CPC Class Codes: C03C 17/007 containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
• CPC Class Codes: C03C 17/009 Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
• CPC Class Codes: C03C 17/3405 with at least two coatings of organic materials C03C17/36, C03C17/42 take precedence
• CPC Class Codes: C03C 2217/445 Organic continuous phases
• CPC Class Codes: C03C 2217/475 Inorganic materials
• CPC Class Codes: C03C 2217/485 Pigments
• CPC Class Codes: Y10T 428/1321 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/24876 Intermediate layer contains particulate material [e.g., pigment, etc.]
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers

Abstract

Hot melt decorative coating compositions for glassware are described. The coating compositions contain 50 to 80% of non-vitrifiable filler which preferably contains at least one pigment intimately dispersed in 50 to 20% of water-insoluble vehicle having a melt softening point range from 45° to 65° C. The vehicle contains as essential ingredients from 5 to 75% of at least one normally solid C_14-32 alcohol and 7 to 55% of certain polystyrenes and can also contain, if desired, up to 55% of paraffin wax, up to 40% of certain polyalkylene glycols, and up to 20% of specific lower alkyl acrylate polymers.

Claims

1. A thermofluid decorative coating composition consisting essentially of by weight

a. 20 to 50% of an essentially water-insoluble vehicle having a melt softening point range from about 45°

to about 65°

C. and

b. 80 to 50% of a particulate, non-vitrifiable filler material intimately dispersed in said vehicle,

said vehicle consisting essentially of by weight from 5 to 75% of at least one normally solid saturated aliphatic monohydric alcohol having 14 to 32 carbon atoms, 0 to 55% of paraffin wax, 0 to 40% of one or more polyalkylene glycols having an average molecular weight ranging from about 1500 to 20,000 in which the alkylene groups have 2 to 3 carbon atoms, 7 to 55% of at least one polystyrene having an average molecular weight ranging from about 200 to about 1200 and a softening point below 105°

C., and 0 to 20% of one or more lower alkyl acrylate polymers having an inherent viscosity between about 0.2 and about 0.7, the sum of said alcohol, wax and polyalkylene glycol components being 45 to 77% of the vehicle and the sum of said polystyrene and acrylate polymer components being 23 to 55% of the vehicle.

2. The coating composition of claim 1 wherein said alcohol is a mixed fatty alcohol containing C₁₆ to C₂₀ alcohols.

3. The coating composition of claim 2 wherein said lower alkyl acrylate polymer is a mixture of equal parts poly(n-butyl methacrylate) and poly(isobutyl methacrylate).

4. The coating composition of claim 3 wherein said filler material contains from about 5 to about 25% based on the weight of the filler material of at least one pigment.

5. The coating composition of claim 4 wherein the polystyrene has a molecular weight of about 300 to about 400 and a softening point between about 5°

and about 75°

C.

6. The coating composition of claim 5 wherein said vehicle contains 15 to 50% of paraffin wax.

7. The coating composition of claim 2 wherein the polystyrene has a molecular weight of about 300 to about 400 and a softening point between about 5°

and about 75°

C. and the vehicle contains 15 to 40% of said polyalkylene glycol.

8. The coating composition of claim 7 wherein said polyalkylene glycol is polyethylene glycol.

9. A process for forming decorated glassware top-coated with a thermoplastic film-forming polymer comprising the steps of applying to at least a portion of the outer surface of the glassware at least one layer of the decorative coating composition of claim 1, heating the decorated glassware to a temperature at least as high as the melting point of the polymer but below the annealing temperature of the glassware for sufficient time to remove any volatile components of the coating composition, and thereafter applying at least one continuous top coating of the thermoplastic film-forming polymer to the decorated glassware.