Method and composition useful treating metal surfaces
US5807430A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1995 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Nov 6, 2015 |
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).sub.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 crosslinking 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 crosslinking when applied to the metal surface to form a 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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.