Composition useful for treating metal surfaces
US6391465B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1998 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | May 29, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D183/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition suitable for treating metal surfaces prior to bonding of the surfaces to materials including metals, rubber, glass, polymers, sealants, coatings, and in particular polymeric adhesives, to enhance the strength of the bond and to prolong useful life in corrosive environments, is described. The composition comprises: (a) water; (b) metal alkoxide comprising M(OR)x, where M is a metal and R is an alkyl group; and (c) organoalkoxysilane comprising silane coupling functional groups capable of bonding with the material to be bonded to the metal surface; and (d) acid to promote hydrolysis and cross-linking of the metal alkoxide and organoalkoxysilane, wherein the molar ratio of metal alkoxide:organoalkoxysilane:acid is selected such that the composition is characterized by: (i) an extended shelf life, and (ii) is capable of cross-linking when applied to the metal surface to form an adherent coating having a substantially uniform distribution of metal, silicon, and oxygen species through the thickness of the coating, (iii) is capable of bonding with the material to be bonded to the metal surface to form a strong adherent bond between the metal surface and the material to be bo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.