Self priming high performance environmentally compatible protective coating
US6485549B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2000 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Aug 2, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/013
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A corrosion resistant coating to protect metallic and polymeric composite surfaces from corrosion and water promoted deterioration that is environmentally safe and non-toxic and is applied in one coat without the use of a primer is provided. The coating comprises a tough, flexible polyurethane binder and a corrosion inhibiting pigment selected from the group consisting of zinc hydroxy phosphite, zinc phosphate, calcium ion-exchanged silica, calcium strontium zinc phosphosilicate. The coating is effective in protecting both aluminum and steel surfaces against corrosion in salt spray environments and in protecting polymeric composite materials such as ablative coatings used in aerospace against deterioration after exposure to water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.