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    Hydrophilic macromers and hydrogels comprising the same
    185.
    发明授权
    Hydrophilic macromers and hydrogels comprising the same 有权

    公开(公告)号：US10101499B2

    公开(公告)日：2018-10-16

    申请号：US14492722

    申请日：2014-09-22

    Applicant: Anubhav Saxena ,  Monjit Phukan ,  Shreedhar Bhat ,  Kenrick M. Lewis ,  Senthilkumar Umapathy

    Inventor： Anubhav Saxena ,  Monjit Phukan ,  Shreedhar Bhat ,  Kenrick M. Lewis ,  Senthilkumar Umapathy

    IPC: C08G77/20 ,  G02B1/04 ,  C08G77/46 ,  C08L83/04 ,  C08L83/08

    Abstract: A composition, suitable for use in producing hydrogel polymer films from which biomedical devices such as contact lenses can be made, comprising at least one hydrophilic silicone macromer. In one aspect, a hydrophilic silicone macromer is of the Formula 1: X—Si(R1)(R2)O—(Si(R3)(R4)O)a—Si(R5)(R6)—Y  (1) wherein R1, R2, R3 R4, R5 and R6 are independently selected from a monovalent linear, branched, or cyclic radical with 1 to 50 carbon atoms, that can optionally contain a heteroatom or I; I is RL—RP; Y is a free radical polymerization-effective hydrophilic group with the general structure: RL—RP—Z; RL is a linking residue from a non-isomerizable hydrosilylation effective terminal olefin comprising the general structure —CH2—C(RbR7)—(CR8R9)n, the subscript n is selected from integers from 1 to 10; R7, R8, and R9 can be selected from hydrogen and a mono-valent hydrocarbon radical with 1 to 10 carbon atoms that optionally contain a heteroatom; Rb is selected from a monovalent hydrocarbon radical with 1 to 6 carbon atoms; RP is a spacer group comprising a diavelant hydrophilic organic radical with 0 to 100 carbon atoms and optionally contains heteroatoms, and X is a free radical polymerizable group. The said composition can be polymers and films suitable for use in making contact lenses.

    Process for preparing rubber compositions and articles made therefrom
    187.
    发明授权
    Process for preparing rubber compositions and articles made therefrom 有权

    公开(公告)号：US10023723B2

    公开(公告)日：2018-07-17

    申请号：US11810300

    申请日：2007-06-05

    Applicant: Ping Jiang ,  Robert James Perry

    Inventor： Ping Jiang ,  Robert James Perry

    IPC: C08K5/31 ,  C08K5/54 ,  C08K5/548

    Abstract: A process for preparing a rubber composition comprises: (a) forming a mixture of: (i) at least one thiocarboxyl-functional hydrolyzable silane, (ii) at least one rubber containing carbon-carbon double bonds, (iii) at least one silane-reactive filler, (iv) at least one activating agent, and (v) water; (b) mixing the composition formed in step (a) under reactive-mechanical-working conditions and in the absence of vulcanizing agent(s); (c) adding at least one vulcanizing agent (vi) to the composition of step (b); (d) mixing the composition of step (c) under non-reactive-mechanical-working conditions; and, (e) optionally, curing the rubber composition of step (d).

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