Fine particle-size powder coating suspension and method
US5000989A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1990 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Jun 26, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D101/284
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A coating suspension including negatively charged fine particles, water, a negative charge precursor, a defoaming agent, a surface active agent, an insolubilizing agent, a plasticizer, and two water-soluble binders is provided. In a preferred embodiment the fine particles are fine particle-size silica. There is also provided a method for coating a substrate with fine particles having a negative electrical charge. The method includes forming a coating suspension including the fine particles, water, a negative charge precursor, a defoaming agent, a surface active agent, an insolubilizing agent, a plasticizer, and two water-soluble binders; applying the coating suspension to the surface of the substrate to form a coated substrate; and heating the coated substrate to cure the coating and remove the water from the suspension. The coating formed is insoluble in water and water based media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.