Silicone-based, curable, printable, hydrophobic coating composit

Details Silicone-based, curable, printable, hydrophobic coating composit Silicone-based, curable, printable, hydrophobic coating composit

1986-12-22

1989-02-21

Lusignan, Michael

Coating processes

Nonuniform coating

Paper or textile base

427387, 528 15, 528 31, 528 32, B05D 302, B05D 500, C08G 7706, C08G 7712

Patent

active

048063916

ABSTRACT:
Silicone-based, high solids, curable, printable, hydrophobic or release coatings or inks comprise a vinyl or hydroxyl chainstopped diorganopolysiloxane; and organic hydrogenpolysiloxane as a curing agent or crosslinker; and a curing catalyst such as a soluble compound of platinum or rhodium, or for hydroxyl chainstopped compositions only, a soluble compound of zinc, manganese, zirconium, cobalt or nickel. Up to about 45% of a vinyl or hydroxyl chainstopped organopolysiloxane resin ("MQ resin") may be included to impart better adhesion to the substrate and/or any pigments used. The combination of chainstopped polysiloxane and organic hydrogenpolysiloxane is characterized by a viscosity at 25.degree. C. of at least about 10,000 centistokes and not more than about 60,000 centistokes. Addition of other printing components such as pigments, rheological additives, reducing oils, fillers, waxes and the like may raise the apparent viscosity of a printing varnish or ink beyond the required range without departing from the invention so long as the viscosity of the basic vehicle from which the ink or varnish was prepared lies within the required range.

REFERENCES:
patent: 3677178 (1972-07-01), Gipe
patent: 3901151 (1975-08-01), Crystal
patent: 4269757 (1981-05-01), Mine et al.
patent: 4427801 (1984-01-01), Sweet

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