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    LOW VISCOSITY COMPOSITIONS AND 3D PRINTING METHODS UTILIZING THE COMPOSITIONS
    3.
    发明申请
    LOW VISCOSITY COMPOSITIONS AND 3D PRINTING METHODS UTILIZING THE COMPOSITIONS 有权

    公开(公告)号：US20210317311A1

    公开(公告)日：2021-10-14

    申请号：US17272108

    申请日：2019-08-28

    Applicant: DOW SILICONES CORPORATION

    Inventor： Jon V. DEGROOT, JR. ,  Eun Sil JANG ,  Eric JOFFRE ,  Bizhong ZHU

    IPC: C08L83/04 ,  C09D11/30 ,  C09D11/102 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/112

    Abstract: A composition for forming a silicone elastomer is disclosed. The composition comprises: A) a linear organopolysiloxane having at least two silicon-bonded ethylenically unsaturated groups per molecule; B) a linear organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule; C) at least one cross-linker; and D) a hydrosilylation catalyst. The cross-linker C) is selected from the group consisting of: C1) an organopolysiloxane having at least three silicon-bonded ethylenically unsaturated groups per molecule; and C2) an organopolysiloxane having at least three silicon-bonded hydrogen atoms per molecule. At least one of the silicon-bonded ethylenically unsaturated groups of component C1) has a lower reactivity relative to the silicon-bonded ethylenically unsaturated groups of component A). Moreover, at least one of the silicon-bonded hydrogen atoms of component C2) has a lower reactivity relative to the silicon-bonded hydrogen atoms of component B). Methods of forming three-dimensional (3D) articles utilizing the compositions are also disclosed.

    PROCESS FOR SYNTHESIZING ALKENYL DISILOXANE
    6.
    发明申请
    PROCESS FOR SYNTHESIZING ALKENYL DISILOXANE 有权

    公开(公告)号：US20230056138A1

    公开(公告)日：2023-02-23

    申请号：US17784082

    申请日：2020-12-11

    Applicant: DOW SILICONES CORPORATION

    Inventor： Xiaoyuan ZHOU ,  Zhanjie LI ,  Eric JOFFRE

    IPC: C07F7/08 ,  C07F7/20

    Abstract: Described herein are methods for making alkenyl disiloxanes, comprising combining an alkenyl halosilane with a bis-hydrido terminated alkyl disiloxane and adding the mixture to water, an acidic aqueous solution, or a basic aqueous solution. The ratio of the alkenyl halosilane to the bis-hydrido terminated alkyl disiloxane is about 1:10 to about 10:1. The alkenyl halosilane and bis-hydrido terminated alkyl disiloxane are mixed at about 20° C. to about 45° C. In an example, no organic solvent is present. The reaction product is separated and washed with saturated NaHCO3 solution (e.g., sodium bicarbonate).

    PROCESSES FOR SYNTHESIZING UNSYMMETRICAL DISILOXANES
    10.
    发明申请
    PROCESSES FOR SYNTHESIZING UNSYMMETRICAL DISILOXANES 有权

    公开(公告)号：US20230099625A1

    公开(公告)日：2023-03-30

    申请号：US17784084

    申请日：2020-12-11

    Applicant: DOW SILICONES CORPORATION

    Inventor： Xiaoyuan ZHOU ,  Zhanjie LI ,  Eric JOFFRE

    IPC: C07F7/08

    Abstract: Described herein are methods for making alkenyl disiloxanes, comprising combining an alkenyl halosilane with an alkyl halosilane and adding the mixture to water, an acidic aqueous solution, or a basic aqueous solution. The ratio of the alkenyl halosilane to the alkyl halosilane is about 10:1 to about 1:10. The alkenyl halosilane and the alkyl halosilane are mixed at about 20° C. to about 45° C. The reaction product is separated and washed with saturated alkali carbonate solution.

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