Aqueous anti-rust surface treatment composition and surface-coated metal member
US10907053B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Apr 28, 2017 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | Nov 4, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2222/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous anti-rust surface treatment composition used for forming a film on a surface of a metal member of the present invention contains a silane coupling agent; a water-soluble transition metal compound containing a water-soluble titanium compound or a water-soluble zirconium compound; a condensed phosphate; and a solvent containing water, in which the condensed phosphate contains a highly condensed phosphate which is a salt of high condensate of equal to or more than four phosphoric acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.