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:
May. 19, 2009
Filed:
Jun. 16, 2003
Taketoshi Toyama, Kariya, JP;
Ryoichi Sanada, Kariya, JP;
Takashi Hatori, Kariya, JP;
Yoshiharu Hasegawa, Kariya, JP;
Yuji Hisatomi, Tokyo, JP;
Ichiro Taninaka, Kakogawa, JP;
Taketoshi Toyama, Kariya, JP;
Ryoichi Sanada, Kariya, JP;
Takashi Hatori, Kariya, JP;
Yoshiharu Hasegawa, Kariya, JP;
Yuji Hisatomi, Tokyo, JP;
Ichiro Taninaka, Kakogawa, JP;
Sumitomo Light Metal Industries, Ltd., Tokyo, JP;
Harima Chemicals, Inc., Kakogawa, Hyogo, JP;
Abstract
An aqueous aluminum brazing composition containing an organic binder and a zinc-based flux which prevents the precipitation of the zinc-based flux having a large specific gravity while securing an excellent brazeability. The thixotropic index of the brazing composition is adjusted to 1.01-1.20 by adding a (meth)acrylic acid/(meth)acrylate copolymer emulsion to the brazing composition as a precipitation inhibitor in an amount of 0.03-1.50 wt % of 100 wt % of the brazing composition. Since the (meth)acrylic acid/(meth)acrylate copolymer emulsion is used as the precipitation inhibitor in a specific amount instead of other types of compounds used for a powder-containing paint, such as ultrafine particle silica, poly(meth)acrylate, or polyvinyl alcohol, the precipitation of the zinc-based flux can be prevented without impairing the brazeability.