Ink-jet printing and ink compsns. esp. emulsion of organic phase - contg. oil or wax in aq. phase with good stability and spraying property

摘要

In ink-jet printing, the ink consists of: (1) an emulsion of an organic phase (I) in an aq. phase (II), (I) contg. oil(s) and/or wax(es); (2) a suspension of wax particles (III) in (II); (3) (I), contg. wax with a m.pt. of 40-150 deg.C and an oil-soluble dyestuff, and (II); (4) (II) and (I) contg. oil and a colorant (IV); (5) (II) and (I) contg. an oil-soluble resin (V) and oil; (6) (III), water and colourant (IV); or (7) (II) and (I) contg. a liquid wax and (IV). The claims also cover an ink of type (1), in which over 75% of (II) is water; and inks which are emulsions of (I) in (II), in which (I) contains (a) a polyhalogenated polyolefin resin and an oil, (b) a liquid wax free from oil or (c) an oil free from wax and polymer. Ink (I) also contains (IV) in (I) and/or (II); and suitable (I) contain : (a) liquid wax, which may contain a pigment and/or dyestuff or be uncoloured; (b) an oil and an oil-soluble wax, pref. with a m.pt. under 150 deg.C, esp. under 100 deg.C, partic. 40-100 deg.C; (c) an oil and (V), pref. a chlorinated polyolefin; (d) oil with a viscosity of ca. 2-150 cP at 40 deg.C; (e) (III) contg. pigment and/or dyestuff, with a m.pt. of 40-150 deg.C; (f) oil contg. oil-soluble dyestuff(s) and/or pigment(s) and opt. (V); (g) liquid wax, an oil-soluble dyestuff and opt. an oil; (b) wax free from oil; or (i) oil free from wax. ADVANTAGE - The ink has acceptable spraying properties and gives good quality prints, which are resistant to water and rubb