Process for preparing anti-mist compounds for printing inks and process for preparing printing inks containing same (US Patent 3,963,501, 1976)

Norbert G. Zalesky received US Patent No. 3,963,501 on June 15, 1976, filed July 30, 1974. It was assigned to Garlock Inc.

The patent's abstract:

Anti-mist compounds adapted to inhibit the misting tendencies of printing inks on high speed printing presses are prepared by mixing chrysotile particles having an average particle size exceeding about 0.01 inch and preferably ranging from 0.1 inch to about 0.5 inch, with a printing ink vehicle to provide a mixture in which the particles of chrysotile are wetted by the vehicle and which preferably contains above about 20% by weight of chrysotile. The mixture is sheared, as on a three roller mill for example, to grind the chrysotile into micro-fibrous particles and to distribute the micro-fibrous particles uniformly throughout the vehicle. By employing chrysotile particles having the aforesaid particle size range, workable compound mixtures containing 35% or more by weight of chrysotile may be obtained. The compound mixtures produced are useful to inhibit the misting tendencies of printing inks without causing flatting or emulsification of the ink, and without appreciably affecting ink viscosity.

Where it was listed

• Asbestos, October 1976, in its patents department (the year's issues)