Abstract:
Release and lubricating composition for avoiding seizure between molten glass and metal molds for forming glass articles, for minimizing wear between mold sections and for improving the pack of glassware, comprising, a dispersion of graphite in a polyimide resin, molds having such composition coated thereon, and a method of applying the composition to molten glass contacting surfaces comprising dispersing the composition in a solvent, applying the dispersed composition to the glass contacting surface and then baking the coating at an elevated temperature.
Abstract:
A composition and method of preparation are herein described for molten release and parting compositions adaptable for use in glass-forming operations. The novel composition comprise a mixture containing tungsten disulfide, a silicate and a setting agent. A preferred composition comprises a mixture of tungsten disulfide and graphite with sodium silicate and a setting agent.
Abstract:
A composition and method is herein described for mold release and parting operations. The novel composition comprises a dispersion of a mixture of a solid lubricant, such as graphite or carbon, a carrier, a binder, and a s-triazinyl derivative. A preferred composition comprises graphite, aqueous carrier, sodium silicate and ammeline.