Patent · US Expired

Antifreeze concentrates and coolant compositions containing these concentrates for cooling circuits in internal combustion engines

US6413445B1 · kind B1 · utility

4Cited by

4References

10Claims

0Family size

Assignee

BASF SE

Inventors

Knut Oppenlander · Ludwigshafen, DE
Wolfgang H. H. Gunther · Hersbruck, DE
Klaus Pfitzner
Michael Gillich · Mutterstadt, DE
Ladislaus Meszaros · Mutterstadt, DE

Key dates

Filing date	Jan 9, 2001
Grant date	Jul 2, 2002
Priority date	—
Expiry date	Jan 9, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23F11/10
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A description is given of antifreeze concentrates which comprisea) at least one water-miscible alcohol which lowers the freezing point;b) at least one corrosion inhibitor; andc) as reserve alkalinity donor, at least one mono- or polycyclic aromatic compound which has at least one hydroxyl group and a high buffer capacity in the pH range from about 6 to 10and of coolant compositions which comprise said concentrates and are intended for the cooling circuits in internal combustion engines.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.