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:
Jun. 16, 1998
Filed:
Sep. 12, 1996
Applicant:
Inventors:
Abel Mendoza, Midland, MI (US);
Mark E Ogle, Grayslake, IL (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C02F / ;
U.S. Cl.
CPC ...
252 76 ; 252 75 ; 252 79 ; 252180 ; 252181 ; 210698 ; 210701 ;
Abstract
A heat transfer fluid is disclosed which comprises a glycol, a phosphate, and a copolymer additive which is a copolymer of an ethylenically substituted carboxylic acid and an aldehyde. A method for preparing the heat transfer fluid comprises admixing 92 to 96 weight percent of one or more glycols; 2 to 4 weight percent of a phosphate; and 0.01 to 0.25 weight percent of the copolymer additive. Precipitation of phosphate salts is inhibited in phosphate-containing glycol-based fluids by the addition of the copolymer additive before mixing the fluid with water.