The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1999
Filed:
May. 20, 1997
Francis R Cala, Highland Park, NJ (US);
Richard A Reynolds, Highstown, NJ (US);
Church & Dwight, Prineton, NJ (US);
Abstract
A flux-removing, aqueous cleaning composition contains: (A) a solvent phase consisting essentially of water; and (B) a flux-removing phase containing an alkaline salt component and a surfactant formulation, the alkaline salt component containing at least one alkali metal salt, and the surfactant formulation containing at least one fluorinated surfactant and at least one N-alkylpyrrolidone surfactant. A method of removing rosin flux residues from a substrate, preferably a substrate of an electronic circuit assembly, involves (a) cleaning the substrate with the above-described aqueous cleaning composition for a period of time sufficient to substantially emulsify the soldering rosin flux residues to form emulsified rosin flux residues; and (b) removing the emulsified rosin flux residues from the substrate.