Aqueous metal treatment composition
US6383307B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D161/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous metal surface treatment composition that includes (A) an aqueous dispersion of a phenolic novolak resin that includes water and a reaction product of a phenolic resin precursor, a modifying agent and a multi-hydroxy phenolic compound wherein the modifying agent includes at least one functional moiety that enables the modifying agent to react with the phenolic resin precursor and at least one ionic moiety, (B) an acid and, optionally, (C) a flexibilizer. According to one embodiment the modifying agent is an aromatic compound. According to another embodiment the ionic moiety of the modifying agent is sulfate, sulfonate, sulfinate, sulfenate or oxysulfonate and the dispersed phenolic resin reaction product has a carbon/sulfur atom ratio of 20:1 to 200:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.