LOW ISOMER HYDROSILYLATION
    4.
    发明申请

    公开(公告)号:US20220363837A1

    公开(公告)日:2022-11-17

    申请号:US17761367

    申请日:2020-12-01

    摘要: A reaction composition contains (a) an allyl polyether having the following formula: CH2=CHCH2O-Aa-B where, (i) subscript a is 2 to 170; (ii) A is selected from: —CH2CH2O—; —CH2CH(CH3)O—; —CH(CH3)CH2O—, CH2CH(CH2CH3)O—; —CH(CH2CH3)CH2O, —CH2CF(CF3)O—, —CF(CF3)CF2O— and —CF2CF(CF3)O—; and (iii) B is selected from —H, —CH3, —CH2CH3, —CH2CH2CH3, —CH2CH2CH2CH3, —C(O)CH3, and —CF2CF2CF3; (b) A silyl hydride functional siloxanc comprising the following siloxane units [R2HSiO1/2]m[R2SiO2/2]d[R2SiO3/2]t[SiO4/2]q wherein d+t+q is one or more and wherein: (i) R is selected from hydrocarbyl groups liaing from one to 8 carbon atoms; (ii) subscript m is 2 or more; (iii) subscript d is zero to 20; (iv) subscript t is zero to 2; (v) subscript q is zero to 2; and (c) a platinum-based hydrosilylation catalyst; where there are at least 4 molar equivalents of silyl hydride functionalities relative to allyl functionalities in the reaction composition.