Water-base binder for aluminum material brazing, brazing composition, and method of brazing with the composition
US6234381A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 17, 1999 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Nov 17, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/3605
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention is a water-based binder used when manufacturing aluminum brazed products such as engine radiators, condensers for car air conditioners, and the like. The water-based binder is obtained by saponifying an ester methacrylate polymer that has an acid value and a glass transition temperature within specified ranges. In the presence of an alcohol that is water soluble and volatile and has a flash point higher than a specified temperature, the brazing composition, in which this binder and flux and the like are mixed, does not have the risk of catching on fire or exploding and also has excellent wettability and can be uniformly coated onto an aluminum material. Furthermore, when a binder in which polyoxirane or polyoxazoline is added as a sub component to this ester methacrylate polymer, which is the main component, the room temperature adhesion of the brazing composition onto the aluminum materials is further improved, and thickening of this composition during coating or storage is also prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.