Cleaning and corrosion inhibition system and composition for...

Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...

Reexamination Certificate

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Details

C510S197000, C510S202000, C510S235000, C510S236000, C510S245000, C510S255000, C510S436000

Reexamination Certificate

active

08071523

ABSTRACT:
The present invention relates to corrosion inhibitor systems, in particular to cleaning and corrosion inhibiting compositions for surfaces of aluminum or colored metals and alloys thereof under alkaline conditions, especially in the food and pharmaceutical industries. The cleaning and corrosion inhibiting compositions comprise as a corrosion inhibitor at least one alkyleneoxy alkylphosphate di- or triester having the general formula (I) where Z is either —O-M or —O-(AO)n2— Alkyl wherein M is an ammonium, alkali metal or alkaline earth metal cation, Alkyl is a C5-C22alkyl or alkylaryl group, AO is a C2-4-alkylene oxide unit and n1, n2and n3each are integers from 2 to 10.

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