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    • 91. 发明申请
    • SYSTEM AND METHOD FOR MANUFACTURING HEAT-ACTIVABLE ADHESIVE PELLETS
    • 制备热活性胶粘剂的系统和方法
    • US20120083578A1
    • 2012-04-05
    • US12896076
    • 2010-10-01
    • Michel BremontMichel Awkal
    • Michel BremontMichel Awkal
    • C08L67/02B01J19/00
    • B29C47/0011B29B9/065B29B2009/163B29C47/0004B29C47/1027B29C47/1081C08G18/0895C08G18/1825C08G18/4063C08G18/42C08G18/6212C08G18/798C08G2170/20C08K3/36C09J175/04
    • A method and an apparatus are provided for the production of heat-activable adhesive pellets which can be formed into elements for holding an article to a surface such as a glass surface. The apparatus and method for the manufacture of the heat-activable pellets includes the steps of introducing at least a first component comprising at least one difunctional polymer with at least one Multifunctional polymer into an extruder, heating the first component, introducing a second component comprising isocyanate and a powder flow enhancer (such as fumed silica) at a point downstream of the introduction of the first component, combining the first and second components in the extruder to form a flowable compound, pelletizing the extruded compound exiting the extruder by cutting to form heat-activable adhesive pellets, and drying the pellets. In one embodiment of the disclosed invention a catalyst is applied to the pellets to form catalyst-coated heat-activable adhesive pellets. In another embodiment of the disclosed invention a catalyst is added into the extruder to form catalyst-containing heat-activable adhesive pellets.
    • 提供了一种制造可热活化的粘合剂颗粒的方法和装置,其可以形成用于将制品保持在诸如玻璃表面的表面的元件。 用于制造可热活化丸剂的装置和方法包括以下步骤:将至少一种包含至少一种双功能聚合物的第一组分与至少一种多官能聚合物引入挤出机中,加热第一组分,引入包含异氰酸酯的第二组分 和在引入第一组分的下游点的粉末流动增强剂(例如热解法二氧化硅),在挤出机中组合第一和第二组分以形成可流动的化合物,通过切割造粒挤出的化合物以形成热量 可能的粘合剂颗粒,并干燥颗粒。 在所公开的发明的一个实施方案中,将催化剂应用于颗粒以形成催化剂涂覆的可热活化粘合剂颗粒。 在所公开的发明的另一个实施方案中,将催化剂加入到挤出机中以形成含催化剂的可热活化的粘合剂颗粒。
    • 93. 发明申请
    • Radically Curable Urethane Dimethacrylates and Compositions Thereof for Tougher Dental Prosthetics
    • 可膨胀固化的聚氨酯二甲基丙烯酸酯及其组合物用于较强的牙科假肢
    • US20120021383A1
    • 2012-01-26
    • US12842586
    • 2010-07-23
    • Sunny SkariaKenneth Berk
    • Sunny SkariaKenneth Berk
    • A61C13/23C08F2/46C08G18/10A61K6/09
    • C08F2/48A61K6/083A61K6/09C08G18/672C08G18/755C08G18/42C08G18/62C08L33/04C08L75/16
    • A radically curable polyurethane composite for dental restorations, including provisional restorations, includes polyurethane dimethacrylate prepolymers that have at least one flexible unit within a polyurethane dimethacrylate backbone, and one or more dimethacrylate monomers. Composite materials made with polyurethane dimethacrylate prepolymers of the invention exhibit superior and optimal properties of flexural strength and deflection-at-break relative to conventional dental resin composites. Composite materials of the invention also provide improved melt-resistance in response to the heat of grinding or finishing, thereby improving the fit of restorations made from the composite and preserving the finishing instruments. Methods of treating a tooth using the radically curable polyurethane composite and methods of making the polyurethane dimethacrylate prepolymers with flexible units is also provided. A kit including the radically curable polyurethane composite is also described.
    • 用于牙科修复体的可自由基固化的聚氨酯复合物,包括临时修复,包括在聚氨酯二甲基丙烯酸酯主链内具有至少一个柔性单元的聚氨酯二甲基丙烯酸酯预聚物和一种或多种二甲基丙烯酸酯单体。 使用本发明的聚氨酯二甲基丙烯酸酯预聚物制成的复合材料相对于常规牙科树脂复合材料表现出优异和最佳的弯曲强度和断裂挠度。 本发明的复合材料还响应于研磨或精加工的热提供改进的耐熔性,从而改善由复合材料制成的修复物的配合并保存精加工设备。 还提供了使用可自由基固化的聚氨酯复合材料处理牙齿的方法和制备具有柔性单元的聚氨酯二甲基丙烯酸酯预聚物的方法。 还描述了包括可自由基固化的聚氨酯复合材料的试剂盒。