Polyamine flux composition and method of soldering
US8070044B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2010 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Dec 2, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A polyamine flux composition is provided, comprising, as an initial component: a polyamine fluxing agent represented by formula I:wherein R1, R2, R3 and R4 are independently selected from a hydrogen, a substituted C1-80 alkyl group, an unsubstituted C1-80 alkyl group, a substituted C7-80 arylalkyl group and an unsubstituted C7-80 arylalkyl group; wherein R7 comprises at least two tertiary carbons and is selected from an unsubstituted C5-80 alkyl group, a substituted C5-80 alkyl group, an unsubstituted C12-80 arylalkyl group and a substituted C12-80 arylalkyl group; and, wherein the two nitrogens shown in formula I are each separately bound to one of the at least two tertiary carbons of R7; with the proviso that when the polyamine fluxing agent of formula I is represented by formula Ia:then zero to three of R1, R2, R3 and R4 is(are) hydrogen. Also provided is a method of soldering an electrical contact using the polyamine flux composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.