Silane-coated organic pigments
US5482547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Feb 3, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/41
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compositions comprising PA1 a) an organic material of high molecular weight in the form of a paint or varnish or of a printing ink, PA1 b) a pigment composition comprising an organic pigment whose particle surface is provided with a tenacious coating of alkyl silicate, said coating being fixed by adsorption of an alkyl silicate on a layer that coats the surface of the pigment particles and consists essentially of partially hydrolyzed organic compounds of elements of group 4A or 4B of the Periodic System selected from the group consisting of chelates of formula ##STR1## wherein R.sub.1 is methyl, ethyl, methoxy or ethoxy, R.sub.2 is methyl or ethyl and R.sub.3 is halogen or C.sub.1 -C.sub.4 alkoxy, and M is Ti or Sn, and of esters of formula EQU M.sub.1 (OR.sub.4).sub.4 (III), PA1 wherein M.sub.1 is an element of group 4A or 4B of the Periodic System and R.sub.4 is C.sub.1 -C.sub.4 alkyl, which alkyl silicate is hydrolyzed before, during or after adsorption. The colorations obtained with these compositions are distinguished by surprisingly good gloss. The pigment compositions b) have excellent rheological properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.