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    Polysiloxane Urethane Compounds and Optically Transparent Adhesive Compositions
    7.
    发明申请
    Polysiloxane Urethane Compounds and Optically Transparent Adhesive Compositions 审中-公开

    公开(公告)号：US20200277445A1

    公开(公告)日：2020-09-03

    申请号：US15929745

    申请日：2020-05-20

    Applicant: Henkel IP & Holding GmbH ,  Henkel AG & Co. KGaA

    Inventor： Shuhua Jin ,  David P. Dworak ,  Qinyan Zhu ,  Alfred A. DeCato ,  Christina Despotopoulou

    IPC: C08G77/38 ,  C09J183/04

    Abstract: Disclosed is a terminally functionalized polysiloxane urethane polymer comprising: polysiloxane segments comprising from 50 to 98% by weight based on the total polymer weight; urethane segments comprising from 2 to 50% by weight based on the total polymer weight; and terminal functional groups selected from (meth)acrylate functional groups, alkoxysilyl functional groups and mixtures thereof. The terminally functionalized polysiloxane urethane polymer finds use in liquid optically clear adhesive formulations wherein it can provide dual photo and moisture cure properties. In some embodiments cured reaction products of the liquid optically clear adhesive composition prepared with the terminally functionalized polysiloxane urethane polymer exhibit low haze of 2% or less and low yellowness b* values of 2 or less as prepared and after aging testing. In some embodiments cured reaction products of the liquid optically clear adhesive composition prepared with the terminally functionalized polysiloxane urethane polymer exhibit minimal shrinkage and a stable compression storage modulus from −40 to 100° C.

    High Modulus Curable Composition
    9.
    发明申请
    High Modulus Curable Composition 审中-公开

    公开(公告)号：US20190100618A1

    公开(公告)日：2019-04-04

    申请号：US16207447

    申请日：2018-12-03

    Applicant: Henkel AG & Co. KGaA

    Inventor： Christina Despotopoulou ,  Jan-Erik Damke ,  Markus Bonigut ,  Johann Klein

    IPC: C08G65/336 ,  C08G65/08 ,  C08J3/24 ,  C09K3/10 ,  C09J171/02 ,  C09D171/02

    Abstract: The invention relates to a curable composition comprising a) at least one polymer having at least one terminal group of the general formula (I) -An-R-SiXYZ  (I), wherein A is a divalent bonding group containing at least one heteroatom, R is selected from divalent hydrocarbon residues having 1 to 12 carbon atoms, X, Y, Z are, independently of one another, selected from the group consisting of a hydroxyl group and C1 to C8 alkyl, C1 to C8 alkoxy, and C1 to C8 acyloxy groups, wherein X, Y, Z are substituents directly bound with the Si atom or the two of the substituents X, Y, Z form a ring together with the Si atom to which they are bound, and at least one of the substituents X, Y, Z is selected from the group consisting of a hydroxyl group, C1 to C8 alkoxy or C1 to C8 acyloxy groups, and n is 0 or 1; and b) at least one compound of the general formula (II) wherein R′ is same or different and is, independently from one another, selected from the group consisting of a hydrogen atom and hydrocarbon residues having 1 to 12 carbon atoms, and Ar is selected from aryl groups, and adhesive, sealant, or coating materials comprising the composition and use thereof.

    Process for the preparation of hydroxyl-functionalized polysiloxanes
    10.
    发明授权
    Process for the preparation of hydroxyl-functionalized polysiloxanes 有权

    公开(公告)号：US11326027B2

    公开(公告)日：2022-05-10

    申请号：US16441451

    申请日：2019-06-14

    Applicant: Henkel AG & Co. KGaA

    Inventor： Marleen Winterberg ,  Marta Woznicka ,  Annika Dietrich ,  Esteban Mejia ,  Udo Kragl ,  Christina Despotopoulou ,  Ralf Dunekake ,  David Briers ,  Johann Klein ,  Henrik Lund

    IPC: C08G77/46 ,  C08G77/16 ,  C07F7/08 ,  C08G77/08 ,  C08G77/388 ,  C08G77/14 ,  C08G65/336

    Abstract: A method for producing a hydroxyl-functionalized polysiloxane having secondary or tertiary hydroxyl groups, said method comprising the steps of: i) reacting a hydroxyalkyl allyl ether having a secondary or tertiary alcohol group with a siloxane under anhydrous conditions and under transition metal catalysis, said hydroxylalkyl allyl ether conforming to Formula (I) wherein n is 0, 1, 2, 3, 4 or 5, preferably 0; m is 1, 2, 3, 4 or 5, preferably 1; spacer group A is constituted by a covalent bond or a C1-C20 alkylene group; R1 is hydrogen, a C1-C8 alkyl group, a C3-C10 cycloalkyl group, a C6-C18 aryl group or an aralkyl group; Ra, Rb, Rc, Rd, R2, R3, R4 and R5 may be the same or different and each is independently selected from hydrogen, a C1-C8 alkyl group, a C6-C18 aryl group or a C6-C18 aralkyl group, with the proviso that at least one of R3 and R4 is not hydrogen; and said siloxane conforming to Formula (II) wherein m is 1, 2, 3, 4 or 5, preferably 1; R6, R7, R8 and R9 may be the same or different and each represent a C1-C8 alkyl group, a C3-C10 cycloalkyl group, a C6-C18 aryl group or a C6-C18 aralkyl group; and ii) in the presence of the reaction product of step i), performing a ring opening polymerization of at least one cyclic siloxane monomer.

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