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Curable organosiloxane oligomer compositions

  • US 10,370,499 B2
  • Filed: 12/22/2014
  • Issued: 08/06/2019
  • Est. Priority Date: 12/31/2013
  • Status: Active Grant
First Claim
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1. A composition comprising the following components:

  • (a) at least one organosiloxane compound, fluorinated organosiloxane compound, or a combination thereof, comprising reactive silane functionality comprising at least two hydroxysilyl moieties;

    (b) at least one organosiloxane oligomer, fluorinated organosiloxane oligomer, or a combination thereof, comprising reactive silane functionality comprising at least two hydrosilyl moieties; and

    (c) a catalyst composition comprising (1) at least one base selected from amidines, guanidines, phosphazenes, proazaphosphatranes, and combinations thereof, and (2) at least one Lewis acid;

    wherein at least one of said components (a) and (b) has an average reactive silane functionality of at least three, the composition is substantially free of an organic solvent, and the composition further comprises
    (R″

    O)p

    Si(R′

    )3-p[G-Si(R′

    )2]t

    (W)s

    [(R′

    )2SiO]q

    [Si(R′

    )2-G]t

    Si(R′

    )3-p

    (OR″

    )p;

    wherein;

    G and W are oxy;

    each R′

    is independently selected from alkyl, alkylene, fluoroalkyl, aryl, fluoroaryl, cycloalkyl, fluorocycloalkyl, hetroalkyl, hetrofluoroalkyl, hetroaryl, hetrofluoroaryl, hetrocycloalkyl, hetrofluorocycloalkyl, oxyalkyl, oxyfluoroalkyl, oxyaryl, oxyfluoroaryl, oxycycloalkyl, oxyfluorocycloalkyl, oxyhetroalkyl, oxyhetrofluoroalkyl, oxyhetroaryl, oxyhetrofluoroaryl, oxyhetrocycloalkyl, and oxyhetrofluorocycloalkyl;

    each R″

    is independently selected from alkyl;

    P is an integer selected from 1, 2 or 3;

    each q is independently selected as an integer of 0-150, inclusive;

    s is selected as an integer of 0-40, inclusive; and

    each t is independently selected as an integer of 0 or 1.

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