Anti-corrosive coating including a filler with a hollow cellular structure
US6383271B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jan 27, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An anti-corrosive coating composition suitable for providing corrosion protection for a sheet metal substrate includes from 20 to 97 wt. % of a filler dispersed in a polymeric base or matrix material. The filler includes at least one filler material having a hollow cellular structure, of which the hollow cells are loaded with organic and/or inorganic inhibitors and/or antioxidants. The hollow cellular structure material may be diatomaceous earth, zeolite, or carbon. The inhibitors and/or antioxidants may be selected from carbonic acids, amines, ketones, aldehydes, heterocyclic compounds, phosphates, benzoates, silicates, vanadates, tungstates, zirconates, borates, molybdates, benzaldehyde, vitamin C, vitamin E, or the like. A long term durable corrosion protection is achieved because the inhibitors and/or antioxidants are released from the hollow cells of the filler material in a dosed time-release manner over the operating lifetime of the anti-corrosive coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.