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    MOLDING DEVICES AND METHODS FOR MAKING ELASTOMERIC PADS FOR USE AS RAIL TIES
    1.
    发明申请
    MOLDING DEVICES AND METHODS FOR MAKING ELASTOMERIC PADS FOR USE AS RAIL TIES 审中-公开

    公开(公告)号：WO2022051208A1

    公开(公告)日：2022-03-10

    申请号：PCT/US2021/048170

    申请日：2021-08-30

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： CHEN, Yinglong ,  DOTSON, Larry ,  WU, Huang ,  REESE, Jason A. ,  LIGHT, Kevin W. ,  MOBLEY, Larry W. ,  COTANDA, Maria-Jose

    IPC: B29C44/34 ,  E01B3/46 ,  B29C44/12

    Abstract: The present invention provides multi-layer articles for use as a rail tie footings comprising, as the tie, an elongate rigid body having a substantially planar surface, and on the substantially planar surface comprising a a microcellular foam elastomeric pad, for example, of a substantially organic solvent free polyurethane, wherein the substantially planar surface has a peripheral landing on which there is no elastomeric pad and the elastomeric pad has a bulk density (ASTM D3676) of from 600 to 2000 Kg/m3 (0.6 to 2.0 g/cm3). In addition, the present invention provides molding methods wherein the microcellular foam elastomeric pad is molded direcly on the rail tie to form a durable footing, wherein the rail tie forms the bottom boundary of a molding chamber during molding and molding comprises forming the top and side boundaries of the molding chamber by inflating an annular pneumatic seal, positioning the seal on the substantially planar surface of the elongate rigid body and keeping the microcellular foam forming materials under pressure during molding.

    REPROCESSABLE POLYURETHANE TEXTILE BACKING
    2.
    发明申请
    REPROCESSABLE POLYURETHANE TEXTILE BACKING 审中-公开
    可再生聚氨酯纺织品背衬

    公开(公告)号：WO2017106086A1

    公开(公告)日：2017-06-22

    申请号：PCT/US2016/066118

    申请日：2016-12-12

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： WILLUMSTAD, Thomas P. ,  MOBLEY, Larry W.

    IPC: C08G18/48 ,  C08G18/66 ,  C08G18/76 ,  C09D175/04 ,  C08L75/04

    CPC classification number: C09D175/04 ,  B32B27/40 ,  C08G18/4866 ,  C08G18/6674 ,  C08G18/7664 ,  C08G18/7671 ,  C08K2003/265 ,  C08L75/04 ,  D06N7/0071 ,  D06N2203/068 ,  D06N2209/103 ,  D06N2209/1628

    Abstract: A reprocessable polyurethane based textile backing includes a reaction product of a mixture including an isocyanate component, an isocyanate reactive component, and one or more fillers. The isocyanate component includes at least an isocyanate-terminated prepolymer or a modified polyisocyanate and the isocyanate component has a calculated isocyanate functionality from 1.9 to 2.1. The isocyanate-reactive component includes one or more low monol content polyether diols derived from propylene oxide and ethylene oxide and having a hydroxyl functionality from 1.97 to 2.00, one or more chain extenders, and one or more catalysts.

    Abstract translation: 可再加工聚氨酯基纺织背衬包括包含异氰酸酯组分，异氰酸酯反应性组分和一种或多种填料的混合物的反应产物。 异氰酸酯组分至少包括异氰酸酯封端的预聚物或改性的聚异氰酸酯，并且异氰酸酯组分具有1.9-2.1的计算的异氰酸酯官能度。 异氰酸酯反应性组分包括一种或多种衍生自环氧丙烷和环氧乙烷且羟基官能度为1.97-2.00的低单醇含量聚醚二醇，一种或多种增链剂和一种或多种催化剂。

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