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. 29, 1981
Filed:
Apr. 21, 1980
Pauls Davis, Gibraltar, MI (US);
Jerrold F Maxwell, Woodhaven, MI (US);
Joe C Wilson, Woodhaven, MI (US);
BASF Wyandotte Corporation, Wyandotte, MI (US);
Abstract
Tertiary, cyclic, bridgehead amines are disclosed as useful corrosion inhibitors for metals in contact with aqueous alkaline liquids. The disclosed amines have been found to be strongly resistant to thermal decomposition, to chemical attack, and to nitrosation. The use of these corrosion inhibitors is particularly desirable in aqueous alcohol compositions useful as a heat exchange liquid in the cooling systems of an internal combustion engine wherein said aqueous solutions are ethylene glycol-based compositions. The disclosed amines are useful under alkaline conditions alone or in combination with conventional corrosion inhibitors such as water-soluble metal salts of tolyltriazole and phosphoric acid, alkali metal nitrites and nitrates, and alkali metal phosphates.