Patent ID: 11873408
Assignee: nan
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 4:
5. The method according to claim 4, wherein the aqueous chromium- and phosphate-free composition comprises:
A) at least 15 wt. %, but no more than 40 wt. %, of silicates dissolved in water, calculated as SiO2;
B) at least 4 wt. %, but no more than 15 wt. %, of sodium and/or potassium ions dissolved in water, calculated as Na and/or K, respectively; and
C) at least 1 wt. %, but no more than 10 wt. %, of the at least one water-insoluble oxide pigment; and
component C) is selected from the water-insoluble oxide pigments of the elements Al, Ti and/or Zr.