Aluminum-containing metal composite material and process for producing same
US5538078A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 5, 1995 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Apr 5, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2265/20
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An aluminum-containing metal composite material useful for heat exchangers having a satisfactory hydrophilic property, water-resistance and resistance to swelling with water and an enhanced durability is produced by coating an aluminum-containing metal substrate with an undercoat chemical conversion layer and then with an uppercoat resinous layer formed from a cross-linking reaction product of a polymeric compound (a) having a reactive amide, hydroxyl or carboxyl group with a cross-linking agent (b), in the presence of a water-soluble polymeric compound (c) having a sulfonic or sulfonate group, and in the cross-linking reaction product, the cross-linked molecules of the polymeric compound (a) form water-insoluble, three-dimensional network structures, and the molecules of the polymeric compound (c) are held in the network structures and thereby exhibit substantially no eluting property in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.