Pigment system for paints
US5112402A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to slurries of synthetic alkali metal silicates with fine particles kaolin clay. The slurries consists of at least 50% solids which solids comprise an approximately 50:50 combination of the fine kaolin clay and the synthetic alkali metal silicate (SAMS). The integrated composition of the SAMS products is an entity having an overall composition of EQU xM.sub.2 O:Al.sub.2 O.sub.3 :ySiO.sub.2 O where x is the number of moles of alkali metal oxide and is an integer from 0.01 to 2.0, M is an alkali metal, y is the number of miles of SiO.sub.2 in the unique SAMS composition, and z is the number of moles of bound water and is an integer ranging from 1.0 to 5.0. The composition essentially comprises altered kaolin clay platelets with an integral rim or protuberance of essentially amorphous alkali metal silicate-kaolin reaction product. The slurry is useful in latex paint systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.