Polymer-based material for carbon deposition during brazing operations
US5845837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K31/027
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A polymeric-based material for use in brazing operations to prevent agglomeration and run-off of brazing material on exterior exposed surfaces of the workpiece containing an extrudable melt-processible thermoplastic material selected from the group consisting of polyethylene, polypropylene, ethylene vinyl alcohol, nylon, and mixtures thereof; and up to about 20% by weight, based on the thermoplastic material, of an inert inorganic particulate material such as carbon or carbon black capable of at deposition on and adherence to an underlying metallic surface. In the process of the present invention, the polymeric-based material is imparted by any suitable means to the exterior or exposed surface of the workpiece to be brazed prior to exposure of the workpiece to a suitable fluxing atmosphere and temperature. In tube forming processes, the polymeric-based material is applied to the outer circumferential area of the formed unsealed tubing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.