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    Thixotropic agent for curable compositions
    1.
    发明授权
    Thixotropic agent for curable compositions 有权

    公开(公告)号：US12240960B2

    公开(公告)日：2025-03-04

    申请号：US17281311

    申请日：2019-11-11

    Applicant: SIKA TECHNOLOGY AG

    Inventor： Andreas Kramer ,  Urs Burckhardt ,  Michael Schlumpf ,  Martin Konstanzer

    IPC: C08K5/21 ,  C07C273/18 ,  C08K5/06 ,  C09K3/10

    Abstract: A thixotropic agent for increasing the yield point of a curable composition, wherein the thixotropic agent includes (i) at least one urea compound from the reaction of at least one isocyanate with at least one amine and (ii) at least one polyether having blocked hydroxyl groups. The thixotropic agent is preparable in a simple manner and forms a spreadable paste which is firm at room temperature. It is particularly suitable as a constituent of moisture-curing polyurethane or SMP compositions, giving a good increase in the yield point thereof, without adversely affecting storage stability or migration characteristics. It enables phthalate-free adhesives, sealants or coatings that have surprisingly good conveyability coupled with a high yield point, and do not cause any problems with odor or fogging.

    Blocking agent for amines, latent hardeners and polyurethane compositions
    4.
    发明授权
    Blocking agent for amines, latent hardeners and polyurethane compositions 有权

    公开(公告)号：US11518736B2

    公开(公告)日：2022-12-06

    申请号：US16618820

    申请日：2018-06-19

    Applicant: SIKA TECHNOLOGY AG

    Inventor： Urs Burckhardt ,  Andreas Kramer

    IPC: C07C251/24 ,  C07C249/02 ,  C08G18/12 ,  C08G18/32 ,  C08G18/48 ,  C08G18/75 ,  C08G18/76 ,  C08L75/08

    Abstract: The use of an aldehyde mixture containing 70 to 95 wt % of aldehydes of formula (I) and 5 to 30 wt % of alkylbenzene compounds not corresponding to formula (I) as a blocking agent for amines results in odorless, especially economically blocked amines, which at room temperature are typically liquid and have a surprisingly low viscosity. Such blocked amines are particularly suitable as latent hardeners in isocyanate-group-containing compositions. Single-component moisture-curing polyurethane compositions formulated therewith are surprisingly stable in storage, can be used for low-emission applications without odor problems and do not trigger any problems with plasticizer migration. Surprisingly, said compositions even have advantages over corresponding compositions having latent hardeners based on purified aldehydes of formula (I), in particular with respect to viscosity, storage stability and especially strength.

    Method for producing a curing agent for low-emission epoxy resin compositions
    5.
    发明授权
    Method for producing a curing agent for low-emission epoxy resin compositions 有权

    公开(公告)号：US11225588B2

    公开(公告)日：2022-01-18

    申请号：US16487954

    申请日：2018-03-13

    Applicant: SIKA TECHNOLOGY AG

    Inventor： Edis Kasemi ,  Andreas Kramer ,  Ursula Stadelmann ,  Urs Burckhardt

    IPC: C09D163/00 ,  C08G59/18 ,  C08G59/24 ,  C08G59/50

    Abstract: A process for preparing a curing agent for epoxy resins, in which an amine mixture including at least one parent amine of the formula (I) and at least one alkylated amine of the formula (II) is reacted or adducted with at least one glycidyl ether of the formula (III). The amine mixture is especially a reaction mixture from the partial alkylation of the amine of the formula (I). The process described enables, with low energy expenditure and high space-time yield, curing agents of low odor, low toxicity, low viscosity and high reactivity for epoxy resins and epoxy resin products that cure rapidly at ambient temperatures and especially also under cold conditions and at the same time enable high-quality coatings having an even, shiny surface.

    POLYMER CONTAINING SILANE GROUPS
    9.
    发明申请
    POLYMER CONTAINING SILANE GROUPS 有权
    含聚硅氧烷的聚合物

    公开(公告)号：US20150126678A1

    公开(公告)日：2015-05-07

    申请号：US14398584

    申请日：2013-05-22

    Applicant: SIKA TECHNOLOGY AG

    Inventor： Andreas Kramer ,  Urs Burckhardt

    IPC: C08G18/83 ,  C09J175/08 ,  C07F7/18

    CPC classification number: C08G18/837 ,  C07F7/1804 ,  C08G18/10 ,  C08G18/285 ,  C08G18/289 ,  C08G18/4866 ,  C08G18/718 ,  C08G18/755 ,  C08G18/7621 ,  C08G2190/00 ,  C09J175/04 ,  C09J175/08

    Abstract: The invention relates to low-viscosity polymers containing silane groups, said polymers curing rapidly under the effect of moisture to form an elastic material with good heat resistance and being in particular suitable for elastic adhesives and sealants. The polymers containing silane groups are based on special hydroxysilanes which carry a secondary OH group. They are in particular obtained by reacting aminosilanes with specially substituted lactones.

    Abstract translation: 本发明涉及含有硅烷基团的低粘度聚合物，所述聚合物在水分作用下快速固化以形成具有良好耐热性的弹性材料，特别适用于弹性粘合剂和密封剂。 含有硅烷基团的聚合物基于带有仲OH基团的特殊羟基硅烷。 它们特别是通过氨基硅烷与特别取代的内酯反应获得的。

    Hardener for epoxy resins
    10.
    发明授权
    Hardener for epoxy resins 有权

    公开(公告)号：US12275817B2

    公开(公告)日：2025-04-15

    申请号：US17272412

    申请日：2019-09-30

    Applicant: SIKA TECHNOLOGY AG

    Inventor： Edis Kasemi ,  Andreas Kramer ,  Ursula Stadelmann ,  Urs Burckhardt

    IPC: C08G59/50 ,  C08K5/17 ,  C08L63/00 ,  C08L79/02 ,  C09D163/00 ,  C09J163/00

    Abstract: A curing agent for epoxy resins, including at least one amine A1 of the formula (I) and at least one amine A2 which is a polyalkyleneamine or polyethyleneimine, where the weight ratio between amine A1 and amine A2 is in the range from 20/1 to 1/2. The curing agent of the invention enables inexpensive and low-emission epoxy resin products having good processability, long pot life, surprisingly rapid curing, especially also under cold conditions, high strength, high bond strengths, high glass transition temperature and a low tendency to yellowing, with formation of surprisingly nice surfaces having barely any blushing-related defects even in the case of two-dimensional application and under moist and cold conditions. Such epoxy resin products are advantageously usable as coating, especially for floors, or as adhesive.

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