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Compositions comprising anionic functionalized polyorganosiloxanes for hydrophobically modifying surfaces and enhancing delivery of active agents to surfaces treated therewith

  • US 20030211050A1
  • Filed: 05/06/2003
  • Published: 11/13/2003
  • Est. Priority Date: 05/09/2002
  • Status: Active Grant
First Claim
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1. A composition for treating and hydrophobically modifying surfaces containing cationic sites, comprising at least about 0.001% by weight of an anionic functionalized siloxane polymer of formula R1R2R3SiO(R4R5SiO)p(R6ASiO)qSiR3R2R1 wherein R1 to R6, which may be identical or different, each represents a linear or branched C1-C8 alkyl or a phenyl radical;

  • A represents a carboxy group containing radical of formula wherein B represents an alkylene residue having from 2 to 30 carbon atoms, optionally interrupted by up to 8 non-neighboring oxygen atoms or groups of the formula —

    NR7

    , —

    CO—

    or —

    C(O)—

    O—

    C(O)—

    , (wherein R7 is hydrogen or C1-C4 alkyl, L represents CR′

    or phenyl, wherein R′

    represents a hydrogen atom, an alkyl radical having from 1 to 30 carbon atoms or a carboxy group, E is nil or is an alkylene residue having from 1 to 5 carbon atoms, optionally substituted by one or more alkyl radicals having from 1 to 8 carbon atoms, Z represents an anionic functional group selected from hydroxy, amino, carboxy, or alkoxy, wherein when L is CR′

    , Z is other than carboxy and when L is phenyl, the groups -E-C(O)OM and -E-Z are ortho to each other and E is nil, and M is H, an alkyl group having from 1 to 4 carbon atoms optionally substituted with a hydroxy or alkoxy groups or a cation selected from the group consisting of alkali metal, alkaline earth metal, and substituted or non substituted ammonium, piperidinium or alkanolamine;

    p is an average value ranging from 0 to 1000; and

    q is an average value ranging from 1 to 100.

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