Treatment process
US5032425A · kind A · utility
12Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1990 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Jan 9, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of coating or encapsulating an inorganic powder is described in which the powder, preferably a pigment, is dispersed in an aqueous medium and an ethylenically unsaturated monomer is polymerized in the presence of the powder and while subjecting the reaction mixture to ultrasonic vibrations. The monomer is present in an amount not exceeding 200% by weight of the powder and preferably is an acrylate or methacrylate. The powder has a cationic charge on its surface which can be generated by treatment of the surface with, preferably an aluminium salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.