Free-flowing, chemically resistant color granulates, their preparation and use
AssigneeFerro Italia S.r.l.
InventorsPeter Thometzek, Heinrich Christ
Life of this patent
Estimating the term…
Abstract
The present invention provides free-flowing chemically resistant color granulates that are heat resistant and color stable in aggressive media. The color granulates comprise 20-94.8% by weight coloring bodies, 5-75% by weight of one or more frits, 0.220% by weight binder and 0.03-15% by weight organosilanes and/or polyorganosiloxanes. The glass frit comprises by weight 20-90% SiO.sub.2 +B.sub.2 O.sub.3 +Al.sub.2 O.sub.3, 0-6% Na.sub.2 O+Li.sub.2 O, 0-6% K.sub.2 O, 10-25% CaO+MgO+ SrO, 0-35% TiO.sub.2 +ZrO.sub.2, 0-40% Bi.sub.2 O.sub.3 +P.sub.2 O.sub.5 +V.sub.2 O.sub.5 +MoO.sub.3 +WO.sub.3 and 0-10% ZnO.
Claims5
Free-flowing chemically resistant color granulates that are heat resistant and color stable in an aggressive media, said color granulates comprising:
- 20-94.8% by weight of at least one coloring body;
- 0.03-15% by weight of a silicon material selected from the group consisting of organosilanes, polyorganosiloxanes and mixtures thereof;
- 5-75% by weight of at least one frit;
- 0. 2-20% by weight of at least one binder selected from the group consisting of an inorganic binder, an organic binder and mixtures thereof;
- said frit comprising in weight percent:
- SiO.sub.2 +B.sub.2 O.sub.3 +Al.sub.2 O.sub.3 20-90 wt. %
- Na.sub.2 O+Li.sub.2 O 0-6 wt. %
- K.sub.2 O 0-6 wt. %
- CaO+MgO+SrO 10-25 wt. %
- TiO.sub.2 +ZrO.sub.2 0-35 wt. %
- Bi.sub.2 O.sub.3 +P.sub.2 O.sub.5 +V.sub.2 O.sub.5 +MoO.sub.3 +WO.sub.3 0-40 wt. %
- ZnO 0-10 wt. %
- said color granulates having an average grain size of from 5 to 25 microns.
Dependencies are inferred from the claim text.