VINYL ETHERS, PROCESS FOR THEIR PREPARATION AND THEIR USE FOR THE PREPARATION OF POLYMERS

    公开(公告)号:CA1142294A

    公开(公告)日:1983-03-01

    申请号:CA377343

    申请日:1981-05-11

    Applicant: CIBA GEIGY AG

    Abstract: The present invention relates to novel polymers which comprises repeating units derived from hydantoin vinyl ethers of the formula in which R1 is hydrogen or an organic radical, R2 is an alkylene group, and R3 and R4 are preferably lower alkylene groups, and optionally repeating units from one or two cocomponents derived from other olefinically unsaturated compounds. The novel polymers can be used as thickeners, solubilising agents, binders, thixotropic agents, complexing agents, stabilisers and so forth.

    7.
    发明专利
    未知

    公开(公告)号:FI973157A

    公开(公告)日:1997-09-24

    申请号:FI973157

    申请日:1997-07-30

    Applicant: CIBA GEIGY AG

    Abstract: PCT No. PCT/EP96/00243 Sec. 371 Date Oct. 6, 1997 Sec. 102(e) Date Oct. 6, 1997 PCT Filed Jan. 22, 1996 PCT Pub. No. WO96/24073 PCT Pub. Date Aug. 8, 1996A process for the production of mouldings, in particular contact lenses, in which a water-soluble, crosslinkable polymer is crosslinked in solution, and mouldings, in particular contact lenses, obtainable by this process; and novel water-soluble, crosslinkable polymers which can be employed in the crosslinking process, in particular those based on polyvinyl alcohol having a molecular weight of at least about 2000 which comprises units of the formulae: XI and XII, XI and XIII or XI, XII and XIII. In said Formulae, U is (a) or -Y-NH-CO-O-Z-O-CH=CH2 group, and a unit of the formula XII and a unit of the formula XIII as defined in the description, and crosslinked polymers, either homopolymers or copolymers, made from these novel water-soluble, crosslinkable polymers, a process for the preparation of the novel water-soluble, crosslinkable polymers and the homopolymers and copolymers obtainable therefrom, mouldings made from said homopolymers or copolymers, in particular contact lenses made from these homopolymers or copolymers, and a process for the production of contact lenses using said homopolymers or copolymers.

    8.
    发明专利
    未知

    公开(公告)号:NO973514D0

    公开(公告)日:1997-07-30

    申请号:NO973514

    申请日:1997-07-30

    Applicant: CIBA GEIGY AG

    Abstract: PCT No. PCT/EP96/00243 Sec. 371 Date Oct. 6, 1997 Sec. 102(e) Date Oct. 6, 1997 PCT Filed Jan. 22, 1996 PCT Pub. No. WO96/24073 PCT Pub. Date Aug. 8, 1996A process for the production of mouldings, in particular contact lenses, in which a water-soluble, crosslinkable polymer is crosslinked in solution, and mouldings, in particular contact lenses, obtainable by this process; and novel water-soluble, crosslinkable polymers which can be employed in the crosslinking process, in particular those based on polyvinyl alcohol having a molecular weight of at least about 2000 which comprises units of the formulae: XI and XII, XI and XIII or XI, XII and XIII. In said Formulae, U is (a) or -Y-NH-CO-O-Z-O-CH=CH2 group, and a unit of the formula XII and a unit of the formula XIII as defined in the description, and crosslinked polymers, either homopolymers or copolymers, made from these novel water-soluble, crosslinkable polymers, a process for the preparation of the novel water-soluble, crosslinkable polymers and the homopolymers and copolymers obtainable therefrom, mouldings made from said homopolymers or copolymers, in particular contact lenses made from these homopolymers or copolymers, and a process for the production of contact lenses using said homopolymers or copolymers.

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