	US 7,513,946 B2
	Chrome free and zinc-poor, anti-corrosive pigment mixture and method for the production and use thereof
Gisela Laumann, Munster (Germany); Ewald Philips, Senden (Germany); and Andreas Vogt, Munstr (Germany)
Assigned to BASF Coatings Aktiengesellschaft, Munster (Germany)
Appl. No. 11/997,801 PCT Filed Jul. 26, 2006, PCT No. PCT/EP2006/007371 § 371(c)(1), (2), (4) Date Feb. 04, 2008, PCT Pub. No. WO2007/014683, PCT Pub. Date Feb. 08, 2007.
Claims priority of application No. 10 2005 036 630 (DE), filed on Aug. 04, 2005.
Prior Publication US 2008/0223256 A1, Sep. 18, 2008
Int. Cl. C09D 5/08 (2006.01); C09D 17/00 (2006.01)

U.S. Cl. 106—462 [106/14.05; 106/14.42; 106/14.44; 106/431; 252/389.2; 524/186; 524/436]

16 Claims

1. A chromium-free, low-zinc, corrosion-inhibiting pigment mixture (A) comprising

(a1) 30% to 60% by weight of at least one calcium hydrogen phosphate pigment,

(a2) 15% to 45% by weight of at least one amorphous, calcium-modified silicon dioxide,

(a3) 5% to 25% by weight of at least one calcium borosilicate pigment, and

(a4) 1% to 15% by weight of at least one zinc salt of an organic nitro compound

with the proviso that the zinc content of (A) does not exceed 10% by weight.