Thixotropic rust removal coating and process
US4578407A · kind A · utility
8Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1982 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Mar 31, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/45
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Spreadable thixotropic coating composition suitable for rust removal and containing polyvinylpyrrolidone, water and a thixotropic agent which is either xanthan gum or water-soluble crosslinked interpolymer of maleic anhydride, monovinyl alkyl ether and crosslinking agent. The composition has a pH between about 1.5 and 7.0 is applied to rusty metal surfaces and allowed to dry. During drying the rust becomes incorporated into the coating which is then easily removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.