Method for stabilizing vinyl aromatic monomers using selected polymerization inhibitors and polymers prepared therewith
    181.
    发明授权
    Method for stabilizing vinyl aromatic monomers using selected polymerization inhibitors and polymers prepared therewith 失效
    使用选择的聚合抑制剂和用其制备的聚合物稳定乙烯基芳族单体的方法

    公开(公告)号:US06960279B2

    公开(公告)日:2005-11-01

    申请号:US10139524

    申请日:2002-05-06

    Inventor: James T. Merrill

    Abstract: Disclosed is the observation that 7-aryl-quinone methides and 4-tert-butylcatechol, when used in combination in a vinyl aromatic monomer to inhibit polymerization,do not inhibit polymerization to the same extend as each would if used separately. Stated another way, a phenomenon has been observed that when these two compounds are used together, they can, to a large extent, render each other unable to inhibit polymerization in a vinyl aromatic monomer. Also disclosed are methods of preventing adverse results of this interaction when undesired and a method of using this interaction to prepare a reactive vinyl aromatic monomer having a concentration of 4-tert-butylcatechol that would otherwise inhibit polymerization. The invention is disclosed to be useful with the production and storage of any vinyl aromatic monomer and is disclosed to be particularly useful with the production and storage of styrene monomer.

    Abstract translation: 公开的观察结果是,7-芳基 - 醌甲基化物和4-叔丁基邻苯二酚在乙烯基芳族单体中组合用于抑制聚合时不抑制聚合反应至相同的延伸,如同分别使用的那样。 换句话说,已经观察到当这两种化合物一起使用时,它们可以在很大程度上彼此不能抑制乙烯基芳族单体中的聚合。 还公开了防止这种相互作用的不利结果的方法,以及使用该相互作用制备具有4-叔丁基儿茶酚浓度的反应性乙烯基芳族单体的方法,否则其将抑制聚合。 公开了本发明可用于任何乙烯基芳族单体的生产和储存,并且被公开用于苯乙烯单体的生产和储存特别有用。

    Use of alternate thiol accelerators for crosslinking rubber in asphalt
    183.
    发明授权
    Use of alternate thiol accelerators for crosslinking rubber in asphalt 有权
    在沥青中使用交替硫醇促进剂交联橡胶

    公开(公告)号:US06956071B2

    公开(公告)日:2005-10-18

    申请号:US10327404

    申请日:2002-12-20

    Abstract: It has been discovered that certain nitrogen-containing thiols other than mercaptobenzothiazole (MBT) perform equivalently as accelerators in preparing asphalt polymer compositions. Typically, the crosslinker in these compositions is sulfur. Nitrogen-containing thiols containing at least one functional group —N═(SH)— have been found to be useful alternate accelerators along with activators such as zinc oxides. Particular nitrogen-containing thiols include, but are not necessarily limited to, 2-mercaptobenzoxazole (MBO), 2-mercapto-5-methyl-1,3,4-thiadiazole (MMTD), and combinations thereof.

    Abstract translation: 已经发现,除了巯基苯并噻唑(MBT)之外的某些含氮硫醇在制备沥青聚合物组合物中等效地作为促进剂进行。 通常,这些组合物中的交联剂是硫。 已经发现含有至少一个官能团-N-(SH)的含氮硫醇是与氧化锌等活化剂一起使用的替代促进剂。 特别的含氮硫醇包括但不一定限于2-巯基苯并恶唑(MBO),2-巯基-5-甲基-1,3,4-噻二唑(MMTD)及其组合。

    Accelerated method to determine or predict failure time in polyethylenes
    184.
    发明授权
    Accelerated method to determine or predict failure time in polyethylenes 失效
    加快确定或预测聚乙烯中失效时间的方法

    公开(公告)号:US06935185B2

    公开(公告)日:2005-08-30

    申请号:US10737624

    申请日:2003-12-16

    Applicant: Carlos Corleto

    Inventor: Carlos Corleto

    CPC classification number: G01N3/60 G01N2203/0066 G01N2203/0647

    Abstract: An accelerated method of determining the failure time of a polyethylene resin by determining the minimum displacement rate, or the time at minimum displacement rate, using ASTM F 1473-01, then following one of these routes: (1) If failure has not yet occurred, cryogenically fracturing the resin specimen and examining it for slow crack growth to determine whether the anticipated, or desired, failure time is generally before or after the predicted failure time; or (2) Applying the minimum displacement rate, or the time at minimum displacement rate, in the appropriate mathematical formula to predict the failure time for the resin. The mathematical formula is derived from the discovery of a power law relationship between the failure time and minimum displacement rate, or between failure time and the time at minimum displacement rate. Thus, it is not necessary to actually test all the way to failure using ASTM F 1473-01, thereby accelerating testing capability and consequently enabling more rapid development of new resins.

    Abstract translation: 通过使用ASTM F 1473-01确定最小位移速率或最小位移速率的时间来确定聚乙烯树脂的故障时间的加速方法,然后遵循以下路线之一:(1)如果还没有发生故障 对树脂样品进行低温压裂并检查其是否有缓慢的裂纹扩展,以确定预期的或期望的故障时间是否通常在预测的故障时间之前或之后; 或(2)以适当的数学公式应用最小位移速率或最小位移速率时间来预测树脂的失效时间。 数学公式是从发现故障时间和最小位移速率之间的幂律关系,或者在故障时间与最小位移速率时间之间发现的。 因此,不需要使用ASTM F 1473-01实际测试所有的故障,从而加快了测试能力,从而可以更快速地开发新型树脂。

    Heat-sealable films
    186.
    发明申请
    Heat-sealable films 审中-公开
    热封膜

    公开(公告)号:US20050100752A1

    公开(公告)日:2005-05-12

    申请号:US10602197

    申请日:2003-06-24

    Abstract: A multilayer polyolefin film of the type suitable for packaging application in which heat seals are formed, and in its preparation the multilayer film comprises a flexible substrate layer formed of a crystalline thermoplastic polymer having an interface surface. A heat-sealable surface layer is bonded to the interface surface of the substrate layer and is formed of a syndiotactic propylene polymer effective to produce a heat seal with itself at a sealing temperature of less than 110° C. The surface layer has a thickness which is less than the thickness of the substrate layer. The heat-seal layer can be formed of syndiotactic polypropylene polymerized in the presence of a syndiospecific metallocene catalyst and having a melt flow index of less than 2 grams/10 minutes. The multilayer film can take the form of a biaxially-oriented film. In the production of the multilayer film incorporating a substrate layer and a heat-sealable surface layer, a crystalline thermoplastic polymer is extruded and formed into a substrate layer film. A second polymer comprising a syndiotactic propylene polymer which is effective to form a heat-sealable surface layer is extruded to form a surface layer that is bonded to the interface of the substrate layer at a temperature within the range of 150-260° C.

    Abstract translation: 一种适用于其中形成热封的包装应用的多层聚烯烃薄膜,在其制备中,多层薄膜包括由具有界面表面的结晶热塑性聚合物形成的柔性基底层。 可热封的表面层粘合到基底层的界面,并由间同立构丙烯聚合物形成,该聚合物有效地在小于110℃的密封温度下自身产生热封。表面层的厚度 小于衬底层的厚度。 热密封层可以由间同立构聚丙烯在间同立构茂金属催化剂存在下聚合并且具有小于2克/ 10分钟的熔体流动指数形成。 多层膜可以采用双轴取向膜的形式。 在制造包含基材层和可热封表面层的多层膜时,将结晶性热塑性聚合物挤出并形成基材层膜。 挤出含有有效形成可热封表面层的间同立构丙烯聚合物的第二聚合物,以形成在150-260℃的温度范围内与基材层的界面结合的表面层。

    Silica-supported alkylation catalyst
    187.
    发明授权
    Silica-supported alkylation catalyst 失效
    二氧化硅负载的烷基化催化剂

    公开(公告)号:US06864399B2

    公开(公告)日:2005-03-08

    申请号:US10193792

    申请日:2002-07-12

    Abstract: The alkylation of benzene-containing feedstock over a zeolite beta alkylation catalyst which is formulated with a silica binder and has an average regeneration coefficient of at least 95% for at least three regenerations. The alkylation reaction is carried out in the liquid phase or supercritical region with a C2-C4 alkylating agent, specifically ethylene. The catalyst exhibits a regeneration coefficient of at least 95% after ethylation of the benzene with ethylene at a benzene/ethylene mole ratio of less than 10. The ethylation of benzene occurs at an initial designated primary activity. The operation of the reaction zone is continued until the activity of the catalyst for the ethylation of benzene decreases by a value of at least 0.1% and not more 1% from the initial designated primary activity. The operation of the reaction for alkylation is terminated and a regeneration procedure is instituted in which the catalyst is regenerated in an oxidizing environment at an average temperature of no more than 500° C. At the conclusion of the regeneration procedure, the operation of the alkylation zone is reinstituted with the reaction zone again operated under conditions as described above followed by regeneration.

    Abstract translation: 在沸石β烷基化催化剂上的含苯原料的烷基化,其用二氧化硅粘合剂配制,并且对至少三次再生具有至少95%的平均再生系数。 烷基化反应在液相或超临界区域用C2-C4烷基化剂,特别是乙烯进行。 苯与乙烯在苯/乙烯摩尔比小于10的乙醚化后,催化剂表现出至少95%的再生系数。苯的乙基化发生在初始指定的主要活性。 反应区的操作继续进行,直到苯的乙基化催化剂的活性从初始指定的主要活性降低至少0.1%且不超过1%的值。 终止烷基化反应的操作,并且在不超过500℃的平均温度下在氧化环境中再生催化剂的再生步骤。在再生过程结束时,烷基化操作 区域被重新配置,反应区域再次在如上所述的条件下操作,随后再生。

    Dispersing agent and method for the delivery of cross-linking agent to polymer modified asphalt compositions
    189.
    发明申请
    Dispersing agent and method for the delivery of cross-linking agent to polymer modified asphalt compositions 失效
    用于将交联剂递送到聚合物改性沥青组合物的分散剂和方法

    公开(公告)号:US20040249024A1

    公开(公告)日:2004-12-09

    申请号:US10454001

    申请日:2003-06-04

    CPC classification number: B01F17/0064 C08L95/00 C08L2666/02

    Abstract: The present invention provides a dispersing agent that facilitates the delivery of a cross-linking agent to polymer modified asphalt. The present invention further includes a composition comprising a liquid hydrocarbon, the dispersant and cross-linking agent, and methods of preparing the composition and of preparing cross-linked polymer modified asphalt composition.

    Abstract translation: 本发明提供一种促进交联剂向聚合物改性沥青输送的分散剂。 本发明还包括包含液体烃,分散剂和交联剂的组合物,以及制备该组合物和制备交联聚合物改性沥青组合物的方法。

    Apparatus and method for pressurizing a propylene polymerization reactor
    190.
    发明申请
    Apparatus and method for pressurizing a propylene polymerization reactor 失效
    用于加压丙烯聚合反应器的装置和方法

    公开(公告)号:US20010005493A1

    公开(公告)日:2001-06-28

    申请号:US09775087

    申请日:2001-01-31

    Abstract: A system for pressurizing a propylene polymerization reactor includes: a pressurization vessel including an internal heat exchanger; a pressure sensor for monitoring the pressure in the vessel, the pressure sensor providing a signal indicative of the pressure in the vessel; a control valve for supplying heated gas to a first region of the vessel in response to signals from the pressure sensor, the first region of the vessel being maintained above the critical temperature and pressure of propylene; a temperature sensor for monitoring the temperature in a second region of the pressurization vessel, the temperature sensor providing a signal indicative of the temperature in the second region of the vessel; and a control valve for supplying a cooling medium to the internal heat exchanger to cool propylene in the second region below the critical temperature of propylene at the pressure in the pressurization vessel.

    Abstract translation: 一种用于加压丙烯聚合反应器的系统包括:加压容器,包括内部热交换器; 用于监测容器中的压力的​​压力传感器,压力传感器提供指示容器中的压力的​​信号; 用于响应于来自压力传感器的信号将加热的气体供应到容器的第一区域的控制阀,容器的第一区域保持在丙烯的临界温度和压力以上; 温度传感器,用于监测加压容器的第二区域中的温度,温度传感器提供指示容器的第二区域中的温度的信号; 以及控制阀,用于向内部热交换器供应冷却介质,以在加压容器中的压力下将丙烯的丙烯在低于丙烯的临界温度下冷却。

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