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. 21, 1993
Filed:
Oct. 12, 1989
Applicant:
Inventors:
Dietmar Schaefer, Essen, DE;
Werner Hohner, Velbert, DE;
Assignee:
Th. Goldschmidt AG, Essen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
25238932 ; 25240031 ; 252403 ; 252399 ; 25238931 ; 252 68 ; 252 783 ; 422 18 ; 556418 ; 556419 ; 556413 ; 556425 ;
Abstract
Methylpolysiloxanes are disclosed which have quaternary ammonium groups linked to silicon atoms via carbon atoms, wherein the ratio of the number of dimethylsiloxy groups to the number of quaternary ammonium groups has a value of 0.5 to 1.5. The methylpolysiloxanes are useful as corrosion inhibitors for preparations consisting predominantly of water, especially coolants, such as cooling lubricants mixed with water, in an amount of 0.01 to 0.1% by weight, based on the total preparation in the form suitable for use.