Composition and method for hydrophilic treatment of aluminum or aluminum alloy
US6248181A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1999 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Feb 19, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2245/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Here are provided a composition for hydrophilic treatment of aluminum or aluminum alloy which can form film having persistent corrosion resistance and hydrophilicity and not generating odor, and a method for hydrophilic treatment. Namely, provided by the invention are a composition for hydrophilic treatment of aluminum or an aluminum alloy which comprises PA1 (P1) a water-soluble polymer having as a constitution unit monomer(s) (I) represented by the formula ##STR1## PA1 wherein, R.sup.1 represents a hydrogen atom or a methyl group, and R.sup.2 and R.sup.3 are the same or different, and each represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a benzyl group or a hydroxyalkyl group having 2 or 3 carbon atoms, PA1 and obtained by homopolymerization or copolymerization of the monomer(s) (I), PA1 (A) a water-soluble trivalent chromium compound, PA1 (B) a water-soluble zirconium compound or titanium compound, and, if necessary, further water, PA1 and wherein the mutual rate of P1, A and B is such that, based on 100 weight parts of the solid matter of P1, A is 0.01 to 70 weight parts and B is 0.001 to 70 weight parts, and PA1 a method for hydrophilic treatment using it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.