Alkaline reaction rinse for decorative autophoretic coatings
AssigneeHenkel AG & Co. KGaA
InventorsJerome Alexander Moebius, Ulrich Dawidowski
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Abstract
The present invention is directed to an aqueous rinse composition having a pH of from 8 to 12 which is obtained by forming a mixture comprising: i) at least one inorganic base; ii) at least one water soluble compound according to general formula (IIA) or a water soluble salt thereof, and/or at least one water soluble compound according to general formula (IIB) or a water-soluble salt thereof; iii) at least one water-soluble polyphosphonic acid or a water-soluble salt thereof according to general formula (III); and, iv) water.
Claims16
An aqueous rinse composition having a pH of from 8 to 12 which is obtained by forming a mixture comprising:
- i) at least one inorganic base;
- ii) at least one water soluble compound according to general formula (IIA) or a water-soluble salt thereof:
- wherein:
- R1, R2 and R3 are independently selected from H or C1-C6 alkyl;
- and/or
- at least one water soluble compound according to general formula (IIB) or a water-soluble salt thereof:
- wherein:
- R4 is selected from H or C1-C6 alkyl;
- iii) at least one water-soluble polyphosphonic acid or a water-soluble salt thereof, wherein said polyphosphonic acid has the general formula (III):
- in which:
- n is at least 2;
- and,
- Z is a connecting organic moiety having an effective valency of n, further wherein said polyphosphonic acid is characterized in that at least two phosphonic groups are separated by an alkylene bridge having 1 or 2 carbon atoms (C1-C2 alkylene);
- and,
- iv) water.
Dependencies are inferred from the claim text.