Anti-discoloring pearly luster pigment and method of preparing the same
US5456749A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Mar 1, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2220/103
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is an anti-discoloring pearly luster pigment of white titanium dioxide-coated mica grains wherein; (a) the surfaces of the titanium dioxide and/or titanium oxide hydrate coated mica particles are coated with from 1 to 7 parts by weight, to 100 parts by weight of the titanium dioxide and/or titanium oxide hydrate coated mica particles, of a silicon oxide and/or silicon oxide hydrate; (b) the surfaces of the coated grains are further coated with from 0.5 to 5 parts by weight, to 100 parts by weight of the mica titanium dioxide and/or titanium oxide hydrate coated particles, of an aluminium oxide and/or aluminum oxide hydrate; and (c) the surfaces of the coated particles are still further coated with from 0.5 to 3 parts by weight, to 100 parts by weight of the titanium dioxide and/or titanium oxide hydrate coated mica particles, of a zinc oxide and/or zinc oxide hydrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.