Patent · US Expired

Process for removing contaminating coatings from metal surfaces

US5738127A · kind A · utility

11Cited by

7References

10Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Peter Heymanns · Essen, DE
Waldemar Kascha · Oberhausen, DE
Ernst Prott · Oberhausen, DE
Horst Scholz · Warstein, DE

Key dates

Filing date	Apr 16, 1996
Grant date	Apr 14, 1998
Priority date	—
Expiry date	Apr 16, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D1/72
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A process for removing contaminating coatings from metal surfaces in which the metal surface to be cleaned is brought into contact with an aqueous alkaline solution containing as an additive 0.1 to 10% by weight, based on the aqueous alkaline solution, of at least one compound of the formula EQU R.sup.1 --O--(CH.sub.2 --CHR.sup.3 --O--).sub.x R.sup.2 I in which R.sup.1 and R.sup.2 are individually alkyl of 1 to 15 carbon atoms, R.sup.3 is hydrogen or methyl and x is an integer from 1 to 25.

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