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    Adhesive based on a special polyurethaneurea with adjustable bonding force, and production and use thereof
    5.
    发明授权
    Adhesive based on a special polyurethaneurea with adjustable bonding force, and production and use thereof 有权

    公开(公告)号：US10883026B2

    公开(公告)日：2021-01-05

    申请号：US16764466

    申请日：2018-12-13

    Applicant: Covestro Deutschland AG

    Inventor： Marc-Stephan Weiser ,  Sascha Plug ,  Sebastian Doerr

    IPC: A61L15/00 ,  A61L24/00 ,  A61L26/00 ,  C08G18/00 ,  C09J175/00 ,  C09J175/08 ,  A61L15/26 ,  C08G18/73 ,  C08G18/75 ,  C08G18/12 ,  C08G18/32 ,  C08G18/08 ,  C08G18/38 ,  C08G18/48 ,  C08G18/66 ,  A61L24/04 ,  A61L15/58

    Abstract: The present invention relates to an adhesive producible from an aqueous polyurethaneurea dispersion comprising an amorphous polyurethaneurea (V1) obtainable by reacting at least A) one aliphatic, cycloaliphatic or araliphatic polyisocyanate component having an average isocyanate functionality of ≥1.8 and ≤2.6, B) one polyetherpolyol component, C) one amino-functional chain extender component having at least 2 isocyanate-reactive amino groups, containing at least one amino-functional compound C1) that does not have any ionic or ionogenic groups and/or an amino-functional compound C2) that has ionic or ionogenic groups, D) optionally further hydrophilizing components different than C2), E) optionally hydroxy-functional compounds having a molecular weight of 62 to 399 mol/g, F) optionally further polymeric polyols that are different than B), G) optionally one compound having exactly one isocyanate-reactive group or one compound having more than one isocyanate-reactive group, where only one of the isocyanate-reactive groups reacts with the isocyanate groups present in the reaction mixture under the reaction conditions chosen, and H) optionally one aliphatic, cycloaliphatic or araliphatic polyisocyanate component having an average isocyanate functionality of >2.6 and ≤4, where components B) and F) together contain ≤30% by weight of component F), based on the total mass of components B) and F) and a hydrophilic polyisocyanate (V2) preparable at least from the components of I) an aliphatic, cycloaliphatic or araliphatic polyisocyanate component having an average isocyanate functionality of preferably ≥2.0 and ≤3.6, J) a polymeric, hydrophilic and monofunctional polyalkylene oxide component, K) optionally further hydrophilizing components different than J), L) optionally admixtures and auxiliaries. The invention likewise provides an adhesive layer and a product including the adhesive, a process for producing the adhesive layer, a specific polyurethaneurea, and the use of the adhesive and a kit having components (V1) and (V2).

    Process for producing elastic and tear-resistant polyurethane foams and uses
    9.
    发明授权
    Process for producing elastic and tear-resistant polyurethane foams and uses 有权

    公开(公告)号：US10988565B2

    公开(公告)日：2021-04-27

    申请号：US16245470

    申请日：2019-01-11

    Applicant: Covestro Deutschland AG

    Inventor： Jan Suetterlin ,  Marc-Stephan Weiser ,  Sascha Plug ,  Sebastian Dörr ,  Claudine Stoye

    IPC: C08G18/10 ,  C08G18/48 ,  C08G18/72 ,  C08G18/79 ,  C08G18/08 ,  C08G18/73 ,  A61F13/00 ,  A61L15/26 ,  A61L15/42 ,  C08G101/00

    Abstract: The invention provides a process for producing polyurethane foams, in which compositions comprising A) isocyanate-functional prepolymers obtainable by the reaction of A1) low molecular weight diisocyanates of molar mass from 140 to 278 g/mol with A2) polyalkylene oxides having an OH functionality of two or more, A3) optionally further isocyanate-reactive components not covered by A2), B) water in an amount of at least 2% by weight, based on the total weight of the composition; C) optionally heterocyclic 4-membered or 6-membered ring oligomers of low molecular weight diisocyanates having a molar mass of 140 to 278 g/mol; D) optionally catalysts; E) optionally salts of weak acids, the corresponding free acids of which have a pKA in water at 25° C. of ≥3.0 and ≤14.0; F) optionally surfactants; G) optionally mono- or polyhydric alcohols or polyols, and H) optionally hydrophilic polyisocyanates obtainable by reaction of H1) low molecular weight diisocyanates of molar mass from 140 to 278 g/mol and/or polyisocyanates preparable therefrom and having an isocyanate functionality of 2 to 6 with H2) monofunctional polyalkylene oxides of OH number from 10 to 250 and of ethylene oxide content from 50 to 100 mol %, based on the total amount of the oxyalkylene groups present, are provided, foamed and cured, wherein the isocyanate-containing components, especially components A, C and H, have a total isocyanate content within a range from 2% to 8% by weight and a content of urethane groups of 1.0 to 3.5 mol/kg, based in each case on the total amount of the isocyanate-containing components, and also the foams thus produced and the uses thereof.

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