Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2006-11-28
2006-11-28
Page, Thurman K. (Department: 1621)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C562S587000
Reexamination Certificate
active
07141537
ABSTRACT:
The present invention provides the use of a fluorinated polyether composition as a surfactant, said fluorinated polyether composition comprising a mixture of fluorinated polyethers of the formula:in-line-formulae description="In-line Formulae" end="lead"?(Rf)n—Xw—Z (I)in-line-formulae description="In-line Formulae" end="tail"?wherein n is 1 or 2, w is 0 or 1, X is a divalent or trivalent organic linking group, Z is a polar group selected from the group consisting of an acid group or a salt thereof, an ammonium group, an amine-oxide group and an amphoteric group, and Rfrepresents a perfluorinated polyether group of the formula:in-line-formulae description="In-line Formulae" end="lead"?CF3CF2CF2—O—[CF(CF3)CF2O]k—CF(CF3)—in-line-formulae description="In-line Formulae" end="tail"?wherein k is at least 1;said mixture of fluorinated polyethers having a weight average molecular weight between 750 g/mol and 5000 g/mol and the amount of perfluorinated polyether groups in said mixture where k is 2 or less, is not more than 10% by weight of the total amount of perfluorinated polyether groups in said mixture.
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Audenaert Frans A.
Dams Rudolf J.
Tan Lian S.
3M Innovative Properties Company
Nwaonicha Chukwuma
Page Thurman K.
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