Cleaning and liquid contact with solids – Processes – Including forming a solidified or hardened coating for cleaning
Reexamination Certificate
2007-06-12
2007-06-12
Toomer, Cephia D. (Department: 1714)
Cleaning and liquid contact with solids
Processes
Including forming a solidified or hardened coating for cleaning
C065S060300
Reexamination Certificate
active
10062490
ABSTRACT:
Use in the treatment of glass substrata of mono- and bi-functional (per)fluoropolyether compounds having the following structures:in-line-formulae description="In-line Formulae" end="lead"?Rf—CFY-L-W (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?W-L-YFC—O—Rf—CFY-L-W (II)in-line-formulae description="In-line Formulae" end="tail"?wherein:L is a linking organic group —CO—NR′—(CH2)q—, with R′=H or C1-C4alkyl; q=1-8; Y=F, CF3;W is a —Si(R1)α(OR2)3−αgroup with α=0, 1, 2;R1and R2equal to or different from each other are C1-C6alkyl groups, optionally containing one or more ether O atoms, C6-C10aryl groups, C7-C12alkyl-aryl or aryl-alkyl groups;Rf has a number average molecular weight in the range 350-5,000, and comprises repeating units of the type:in-line-formulae description="In-line Formulae" end="lead"?(CFXO),(CF2CF2O),(CF(CF3)CF2O),(CF2CF(CF3)O),in-line-formulae description="In-line Formulae" end="tail"?wherein X=F, CF3.
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Carignano Gabriella
De Dominicis Mattia
Arent & Fox LLP
Solvay Solexis S.p.A.
Toomer Cephia D.
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