Coating processes – Particles – flakes – or granules coated or encapsulated – Inorganic base
Patent
1995-05-23
1997-09-09
Beck, Shrive
Coating processes
Particles, flakes, or granules coated or encapsulated
Inorganic base
427128, 427130, 427212, 427215, 427217, B05D 700
Patent
active
056654294
ABSTRACT:
Encapsulated particles, such as magnetic particles, colored pigments, or carbon black, with high chemical affinity for ink vehicles. The encapsulated particles of this invention are suitable for printing inks, as well as for magnetic recording systems, such as audio and video tapes and magnetic storage disks, when the encapsulated particles are magnetic particles. The encapsulated particles comprise particles having a coating on their surface, said coating comprising in one embodiment an ionomer and in another embodiment, an oil, such as soya oil, and optionally a thixotropic agent, and/or a binder resin. The method of the present invention for making such encapsulated particles avoids the use of volatile organic solvents and provides printing inks and coating compositions comprising such encapsulated particles, that also avoid the use of volatile organic solvents. Inks may be readily formulated without the need for the complicated and expensive flushing process, by simply dispersing the encapsulated colored pigment or carbon black in the desired vehicle.
REFERENCES:
patent: 4310565 (1982-01-01), Lehner et al.
patent: 4925763 (1990-05-01), Tsubuko et al.
patent: 5122188 (1992-06-01), Erhan et al.
Beck Shrive
Maiorana David M.
Videojet Systems International Inc.
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