Complexes of mid-transition metals and unsaturated nitrogenous ligands as single-site catalysts
    2.
    发明授权
    Complexes of mid-transition metals and unsaturated nitrogenous ligands as single-site catalysts 失效
    中间过渡金属和不饱和含氮配体的复合物作为单中心催化剂

    公开(公告)号:US06355746B1

    公开(公告)日:2002-03-12

    申请号:US09414132

    申请日:1999-10-06

    Abstract: Novel compounds are provided which are useful as catalysts, particularly in the polymerization of addition polymerizable monomers such as olefinic or vinyl monomers. The compounds are complexes of a mid-transition metal coordinated to at least two ligands, at least one of which is an unsaturated nitrogenous ligand. Depending on ligand substitution, stereospecific catalysts can be provided, including isospecific catalysts and syndiospecific catalysts. Catalyst systems containing the novel compounds in combination with a catalyst activator are provided as well, as are methods of using the novel compounds in the preparation of polyolefins.

    Abstract translation: 提供了可用作催化剂的新型化合物,特别是在可加聚单体如烯属或乙烯基单体的聚合中。 这些化合物是与至少两个配体配位的中间过渡金属的络合物,其中至少一个是不饱和含氮配体。 取决于配体取代,可以提供立体特异性催化剂,包括异相催化剂和间同立构催化剂。 还提供了含有新型化合物与催化剂活化剂组合的催化剂体系,以及在制备聚烯烃中使用新化合物的方法。

    Reinforced wallboard
    4.
    发明授权
    Reinforced wallboard 有权
    钢筋墙板

    公开(公告)号:US06841232B2

    公开(公告)日:2005-01-11

    申请号:US10351675

    申请日:2003-01-23

    Abstract: A reinforced wallboard core is prepared from a slurry comprising a mixture of β-calcium sulfate hemihydrate, a cellulose ether additive other than CMC and an amount of water that is sufficient to form a slurry and resulting in a wallboard density of less than 0.8 g/cc. The β-calcium sulfate hemihydrate is hydrated by the water forming a wallboard core reinforced by the cellulose ether additive. The cellulose ether, having a molecular weight of at least about 20,000 and a viscosity grade of at least about 100 cps, is selected to give the reinforced wallboard core improved nail pull resistance and greater flexural strength than unreinforced wallboard of the same density. The reinforced wallboard core may be used for reduced-paper wallboard and/or for lightweight wallboard, for example.

    Abstract translation: 由包含β-硫酸钙半水合物,除CMC以外的纤维素醚添加剂的混合物和足以形成浆料的水的量的浆料制备增强的墙板芯,并导致壁板密度小于0.8g / cc。 β-硫酸钙半水合物通过水形成由纤维素醚添加剂增强的墙板芯水合。 选择具有至少约20,000的分子量和至少约100cps的粘度等级的纤维素醚,以使得增强的墙板芯能够提高相对于相同密度的非增强墙板的拔甲力和抗弯强度。 例如,加强墙板芯可用于减薄纸墙板和/或用于轻质墙板。

    Mixed organic and inorganic composites with intermingled facial layers
    7.
    发明授权
    Mixed organic and inorganic composites with intermingled facial layers 有权
    混合的有机和无机复合材料与混合的面层

    公开(公告)号:US06846856B1

    公开(公告)日:2005-01-25

    申请号:US10442467

    申请日:2003-05-20

    CPC classification number: C08K9/04 C08K9/08

    Abstract: A composite structure comprises an inorganic discrete phase, an organic matrix phase and an interfacial layer comprising both the inorganic and organic phases. In one process, the inorganic discrete phase is partially dissolved and the precipitated by a chemical reaction forming an interfacial layer having a finite thickness and transitioning from 100% inorganic to 100% organic.

    Abstract translation: 复合结构包括无机离散相,有机基质相和包含无机相和有机相的界面层。 在一个过程中,无机离散相部分溶解,并通过化学反应沉淀,形成具有有限厚度并从100%无机转变为100%有机物的界面层。

    Transition metal complexes in the controlled synthesis of polyolefins substituted with functional groups
    9.
    发明授权
    Transition metal complexes in the controlled synthesis of polyolefins substituted with functional groups 失效
    过渡金属络合物在被官能团取代的聚烯烃的控制合成中

    公开(公告)号:US07037990B2

    公开(公告)日:2006-05-02

    申请号:US10336666

    申请日:2003-01-03

    CPC classification number: C07F15/008 C08F10/00 C08F4/7006 C08F4/7004

    Abstract: A method is provided for the polymerization of olefins substituted with a functional group using a transition metal catalyst that, by virtue of one or more stabilizing groups incorporated within the catalyst structure, “fixes” the stereoconfiguration of each olefinic monomer relative to the transition metal complex during each successive reaction in the polymerization process. The invention substantially reduces the likelihood of olefin rearrangement at the active site of the catalyst during polymerization. In one particular embodiment, the functional group is a polar, electron-donating group and the stabilizing group is a Lewis acid substituent; examples of polymers that can be prepared with such a system include poly(vinyl acetate), poly(vinyl alcohol), and poly(vinyl ethers). Novel complexes and catalyst systems useful in the polymerization method are also provided.

    Abstract translation: 提供了一种使用过渡金属催化剂聚合由官能团取代的烯烃的方法,其通过引入催化剂结构内的一个或多个稳定基团“固定”每个烯属单体相对于过渡金属络合物的立体构型 在聚合过程中的每个连续反应期间。 本发明基本上降低了聚合过程中催化剂活性位点烯烃重排的可能性。 在一个具体实施方案中,官能团是极性的给电子基团,稳定基团是路易斯酸取代基; 可以用这种体系制备的聚合物的实例包括聚(乙酸乙烯酯),聚(乙烯醇)和聚(乙烯基醚)。 还提供了可用于聚合方法的新型络合物和催化剂体系。

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