CHITOSAN DENTAL SURGICAL MEMBRANE AND METHOD OF MAKING

    公开(公告)号:US20170224868A1

    公开(公告)日:2017-08-10

    申请号:US15332770

    申请日:2016-10-24

    Abstract: A porous, resorbable and flexible dental surgical membrane (16) is made from chitosan having a viscosity average molecular weight of about 400,000 daltons up to about 2,000,000 daltons and has a thickness of from about 100 microns to about 0.5 mm. The membrane is easily insertable over a bone graft material site to confine the bone graft material (14) while allowing access to the bone graft material of blood and oxygen and applied medicaments through the membrane. The high molecular weight of the chitosan may be chosen so that the membrane will not dissolve or resorb in a human mouth for a protracted period, e.g., from about 12 to about 16 weeks. The membrane is made by dissolving medical grade chitosan in aqueous acetic acid, dispersing fine silica particles into the solution to form a slurry, depositing a film of the slurry on a support surface, evaporating liquid from the slurry sufficiently to form a coherent chitosan membrane having silica particles dispersed therein, and then dissolving the silica particles with a sodium hydroxide solution followed by a water wash to form the porous chitosan membrane.

    Resinous oil-retaining article and method for production thereof
    86.
    发明授权
    Resinous oil-retaining article and method for production thereof 失效
    树脂保油品及​​其制造方法

    公开(公告)号:US08003203B2

    公开(公告)日:2011-08-23

    申请号:US11884042

    申请日:2006-03-01

    Abstract: The present invention provides a porous resinous oil-retaining article, containing lubricating oil, which is excellent in the utilization efficiency of the lubricating oil, has a high mechanical strength, and further allows the resin and the lubricating oil to be combined with each other according to a use and a specification. The present invention also provides a method of producing the resinous oil-retaining article. The resinous oil-retaining article comprises a resinous porous article having interconnected holes which are open to a surface of the resinous porous article; and an oil impregnated into the resinous porous article. The interconnected holes are formed by molding a resin containing a pore-forming substance into a molding and extracting a part of the pore-forming substance from the molding with a solvent which dissolves the pore-forming substance and does not dissolve the resin. An interconnected hole porosity of the resinous porous article is not more than 30%.

    Abstract translation: 本发明提供一种含有润滑油的润滑油的多孔树脂保油品,其润滑油的利用效率优异,机械强度高,并且进一步允许树脂和润滑油根据 使用和规格。 本发明还提供一种生产树脂保油制品的方法。 树脂保油制品包括具有互连孔的树脂多孔制品,其与树脂多孔制品的表面开口; 和浸渍在树脂多孔制品中的油。 通过将含有成孔物质的树脂模塑成型,并且用溶解成孔物质并且不溶解树脂的溶剂从成型体中提取一部分成孔物质来形成互连的孔。 树脂多孔体的相互连通的孔隙率不大于30%。

    POROUS MEMBER
    88.
    发明申请
    POROUS MEMBER 有权
    多数会员

    公开(公告)号:US20110011793A1

    公开(公告)日:2011-01-20

    申请号:US12677182

    申请日:2009-02-23

    CPC classification number: B01D39/1676 C08J9/26 C08J2201/044 C08J2327/18

    Abstract: According to one embodiment of the present invention, there is provided a porous member formed by providing a member 1 formed of a fluororesin 3 containing carbon fiber 2 and having a predetermined shape and exposing the member 1 to an oxidizing gas to remove the carbon fiber 2 contained in the member 1.

    Abstract translation: 根据本发明的一个实施例,提供了一种多孔构件,其通过提供由含有碳纤维2的氟树脂3形成并具有预定形状的构件1形成,并将构件1暴露于氧化气体以除去碳纤维2 包含在成员1中。

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