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    • 1. 发明专利
    • DE60227667D1
    • 2008-08-28
    • DE60227667
    • 2002-05-21
    • DOW GLOBAL TECHNOLOGIES INC
    • CHRISTENSON CHRISTOPHER PWROBEL STANSHARMA DEEPAK KSTORER JOEY WSANDFORD ANDREW F
    • C08G18/10A61L9/012A61L9/04A61L9/12
    • A transparent polyurethane-hydrogel composition includes a reaction product in aqueous solvent of a prepolymer and a water-soluble crosslinker in the substantial absence of organic solvent, and such a composition can be prepared by admixing a prepolymer and a water-soluble crosslinker in aqueous solvent and in the substantial absence of organic solvent. A prepolymer is present in an amount of no greater than about 5 weight percent based on total weight of all hydrogel components. The prepolymer is generally prepared from at least one water-soluble polyol and an isocyanate. A water-soluble crosslinker generally has a crosslinker functionality of at least 2 and is selected to provide a site ratio of initial isocyanate to crosslinker (i.e., moles NCOxfunctionality/moles crosslinkerxfunctionality) of at least about 1.5 and no greater than about 2.6. In one embodiment, a crosslinker is effective to react with and solubilize residual isocyanate concurrently with the reaction between prepolymer and crosslinker. A transparent polyurethane-hydrogel composition has desirable gel physical properties and is useful for an air-freshener application.
    • 8. 发明专利
    • AT233772T
    • 2003-03-15
    • AT99927518
    • 1999-06-11
    • DOW GLOBAL TECHNOLOGIES INC
    • CHEN EUGENE YKRUPER WILLIAM J JRROOF GORDON RSCHWARTZ DAVID JSTORER JOEY W
    • C07F5/06C08F4/642C08F4/6592C08F10/00
    • Compounds corresponding to the formula: AlArfQ1Q2, or a dimer, adduct, or mixture thereof and further mixtures with aluminum compounds of the formula AlArf3, where:Arf is a fluorinated aromatic hydrocarbyl moiety of from 6 to 30 carbon atoms;Q1 is Af or a C1-20 hydrocarbyl group, optionally substituted with one or more cyclohydrocarbyl, hydrocarbyloxy, hydrocarbylsiloxy, hydrocarbylsilylamino, hydrocarbylsilyl, silylhydrocarbyl, di(hydrocarbylsilyl)amino, hydrocarbylamino, di(hydrocarbyl)amino, di(hydrocarbyl)phosphino, or hydrocarbylsulfido groups having from 1 to 20 atoms other than hydrogen, or, further optionally, such substituents may be covalently linked with each other to form one or more fused rings or ring systems; andQ2 is an aryloxy, arylsulfide or di(hydrocarbyl)amido group, optionally substituted with one or more hydrocarbyl, cyclohydrocarbyl, hydrocarbyloxy, hydrocarbylsiloxy, hydrocarbylsilylamino, hydrocarbylsilyl, silylhydrocarbyl, di(hydrocarbylsilyl)amino, hydrocarbylamino, di(hydrocarbyl)amino, di(hydrocarbyl)phosphino, or hydrocarbylsulfido groups having from 1 to 20 atoms other than hydrogen, or, further optionally such substituents may be covalently linked with each other to form one or more fused rings or ring systems, said Q2 having from 3 to 20 atoms other than hydrogen are useful as activators for olefin polymerizations.