Aqueous latex emulsions containing basic aluminum compounds of wood-stain reducing agents
US4021398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Apr 18, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D7/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Staining and discoloration of painted wood surfaces, as a result of bleeding into the top or finish coat of soluble coloring matter and tannins naturally present in the wood, is prevented by coating or impregnating the wood with a basic aluminum compound, particularly with a water soluble basic aluminum halide or derivative thereof. The basic aluminum compound may be applied in aqueous solution or non-pigmented emulsion for prefinishing building lumber, or applied in the form of a pigmented emulsion as a primer coat. The present invention relates to novel methods and compositions for application to the surfaces of woods, particularly to stain-susceptible woods, to prevent their staining or discoloring as a result of tannin and tocopherol or other waste-soluble coloring matter present in the raw wood, bleeding or migrating into a subsequently applied preservative or decorative paint film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.