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1.发明授权
公开(公告)号：US5663252A
公开(公告)日：1997-09-02
申请号：US560235
申请日：1995-11-21
CPC分类号： C08F4/34
摘要： A free radical polymerization process for producing a branched polymer from a vinyl aromatic monomer comprising polymerizing a vinyl aromatic monomer in the presence of a free radical initiator of the formula: ##STR1## wherein R is H, alkyl, or aralkyl, and R' is alkyl or aryl.
摘要翻译： 一种用于从乙烯基芳族单体制备支化聚合物的自由基聚合方法，包括在下式的自由基引发剂存在下聚合乙烯基芳族单体：其中R是H，烷基或芳烷基，R'是 烷基或芳基。
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2.发明授权Extruded foams having a monovinyl aromatic polymer with a broad molecular weight distribution 失效具有宽分子量分布的单乙烯基芳族聚合物的挤出泡沫
公开(公告)号：US5650106A
公开(公告)日：1997-07-22
申请号：US667700
申请日：1996-06-21
CPC分类号： C08J9/127 , C08J2203/142 , C08J2325/02
摘要： Disclosed is an extruded, linear, bimodal monovinyl aromatic polymer foam having a weight average molecular weight of from about 100,000 to about 200,000, greater than 5 percent by weight of its polymer chains having a weight average molecular weight of 500,000 to 1,000,000, and less than 5 percent by weight of its polymer chains having a weight average molecular weight of greater than 1,000,000. Use of the polymer enables process pressure drop to be significantly reduced and allows the formation of a foam of lower density and larger cross-section. Further disclosed is a process for making the extruded foam.
摘要翻译： 公开了一种挤出的线性单峰乙烯基芳族聚合物泡沫，其重均分子量为约100,000至约200,000，大于其重均分子量为500,000至1,000,000的聚合物链的5重量％，并且小于 5重量％的其重均分子量大于1,000,000的聚合物链。 使用聚合物可以显着降低工艺压降，并允许形成较低密度和较大横截面的泡沫。 进一步公开的是制造挤出泡沫的方法。
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公开(公告)号：US5948874A
公开(公告)日：1999-09-07
申请号：US65974
申请日：1998-04-24
申请人： William C. Pike , Duane B. Priddy
发明人： William C. Pike , Duane B. Priddy
IPC分类号： C08F2/00 , C08F4/00 , C08F12/04 , C08F220/06 , C08F2/02 , C08F220/10
CPC分类号： C08F12/04
摘要： The present invention is an improvement in a free radical bulk polymerization process for preparing a high molecular weight polymer from a vinyl aromatic monomer characterized in that the polymerization is conducted in the presence of an acid catalyst having a pKa at 25.degree. C. of less than 2, or salt thereof, wherein the improvement comprises dispersing the acid catalyst, or salt thereof, in a (meth)acrylic acid or ester thereof, prior to contact with the vinyl aromatic monomer. The (meth)acrylic acid or ester allows the acid catalyst to be dispersed within the vinyl aromatic monomer without causing cationic polymerization. The acid catalyst, or salt thereof, catalyzes the free radical polymerization reaction such that high molecular weight polymers are produced in reasonable reaction times.
摘要翻译： 本发明是一种用于由乙烯基芳族单体制备高分子量聚合物的自由基本体聚合方法的改进，其特征在于聚合反应在酸性催化剂存在下进行，其中pKa在25℃下小于 2或其盐，其中改进包括在与乙烯基芳族单体接触之前将酸催化剂或其盐分散在（甲基）丙烯酸或其酯中。 （甲基）丙烯酸酯可使酸催化剂分散在乙烯基芳族单体中而不引起阳离子聚合。 酸催化剂或其盐催化自由基聚合反应，使得在合理的反应时间内产生高分子量聚合物。
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4.发明授权Process for producing high molecular weight monovinylidene aromatic polymers and polymodal compositions 失效制备高分子量单亚乙烯基芳族聚合物和多模式组合物的方法公开(公告)号：US06214945B1
公开(公告)日：2001-04-10
申请号：US09549324
申请日：2000-04-13
申请人： William C. Pike , James M. Roe , Duane B. Priddy , Jose M. Rego
发明人： William C. Pike , James M. Roe , Duane B. Priddy , Jose M. Rego
IPC分类号： C08F1204
CPC分类号： C08F212/04 , C08F12/04
摘要： The present invention is an improved process for producing high molecular weight monovinylidene aromatic polymers and polymodal compositions by free radical polymerization of a vinyl aromatic monomer in the presence of a vinyl acid, wherein the improvement comprises neutralizing the acid after production of the desired amount of high molecular weight monovinylidene aromatic polymer by adding a base.
摘要翻译： 本发明是通过在乙烯基酸存在下乙烯基芳族单体的自由基聚合制备高分子量单亚乙烯基芳族聚合物和多模式组合物的改进方法，其中改进包括在产生所需量的高的量之后中和酸 分子量单亚乙烯基芳族聚合物加入碱。
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公开(公告)号：US5700887A
公开(公告)日：1997-12-23
申请号：US595710
申请日：1996-02-02
CPC分类号： C08F297/023
摘要： A process for producing a branched polymer from a vinyl aromatic monomer comprising: A) contacting a vinyl aromatic monomer with a difunctional anionic initiator under conditions such that a dianion macromer is formed, B) contacting the dianion macromer with a multifunctional coupling agent having at least 3 reactive sites under polymerization conditions such that branches form during polymerization, and C) contacting the product of step B with a terminating agent under conditions such that the reactive sites are terminated.
摘要翻译： 一种由乙烯基芳族单体制备支化聚合物的方法，包括：A）在形成二价阴离子大分子单体的条件下使乙烯基芳族单体与双功能阴离子引发剂接触，B）使所述二价离子大分子单体与多官能偶联剂 3聚合条件下的反应位点，使得在聚合期间形成分支，和C）在终止反应性位点的条件下使步骤B的产物与终止剂接触。
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公开(公告)号：US4715455A
公开(公告)日：1987-12-29
申请号：US918320
申请日：1986-10-14
摘要： A drill shoe adapted to fit onto a drill pipe of external diameter d.sub.e and internal diameter d.sub.i comprises an externally stepped cutting surface comprising a plurality of steps, the diameters of the steps increasing as they progress away from the tip of the shoe. The maximum external diameter D.sub.e of the shoe is greater than the external diameter d.sub.e of the drill pipe. The shoe also comprises an internal, substantially cylindrical, inner surface of diameter D.sub.i, D.sub.i being less than the internal diameter d.sub.i of the drill pipe.The shoe is suitable for use in a vibratory drill string for obtaining cores from unconsolidated geological formations, such as soil, sand and gravel or similar materials.
摘要翻译： 适合于安装在外径和内径di的钻杆上的钻床包括外部阶梯式切割表面，其包括多个台阶，当台阶从鞋的尖端远离时，台阶的直径增加。 鞋的最大外径De大于钻杆的外径de。 该鞋还包括直径为Di，Di的内部基本上圆柱形的内表面，小于钻杆的内径di。 该鞋适用于振动钻柱，用于从松散的地质构造（如土壤，沙子和砾石或类似材料）获得岩芯。
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公开(公告)号：US4728152A
公开(公告)日：1988-03-01
申请号：US868723
申请日：1986-05-30
摘要： A method for the extraction of a mineral from an underground unconsolidated formation comprises the steps of:(a) driving a casing through the overburden and into the mineral bearing pay zone,(b) passing a high pressure water jet head and associated supply line down through the casing so that an annulus is formed between the casing and the supply line and the jet head projects just beyond the casing,(c) directing water from the jet head into the pay zone to cause disintegration of the latter,(d) recovering desired product through the annulus between the piping and the casing,(e) moving the jet head to a different level in the pay zone when the previous level is effectively exhausted, and(f) moving the casing in association with the jet head so that the latter remains in the same operating position with respect to the casing with the jet head projecting just beyond the casing.The method is particularly suitable for extracting bitumen from tar sands.
摘要翻译： 从地下未固结地层中提取矿物的方法包括以下步骤：（a）将套管穿过覆盖层并进入矿物支承区，（b）将高压水喷头和相关的供水管线向下 通过壳体，使得在壳体和供应管线之间形成环形空间，并且喷射头刚好突出到壳体之外，（c）将水从喷射头引导到工作区域以使其分解，（d）恢复 所需产品通过管道和套管之间的环形空间，（e）当先前水平被有效地排出时，将喷头移动到工作区域中的不同水平，以及（f）与喷射头相关联地移动壳体，使得 后者保持在相对于壳体处于相同的操作位置，其中喷射头刚刚伸出壳体。 该方法特别适用于从沥青砂中提取沥青。
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公开(公告)号：US5141965A
公开(公告)日：1992-08-25
申请号：US821524
申请日：1992-01-14
申请人： William C. Pike
发明人： William C. Pike
CPC分类号： C08F8/24 , B01J41/043 , B01J41/14 , B01J45/00 , C08F8/32 , C08F8/44 , Y10S423/14
摘要： Disclosed are novel ion-exchange and chelate-exchange resins having improved exchange kinetics for separating chemical species from liquids. The resins are prepared from copolymer beads consisting of a monovinyl aromatic monomer and a cross-linking monomer. The copolymer beads are functionalized such that weak-base exchange moieties are substituted at haloalkylated sites which are most accessible to diffusion into the beads, while hydrophilic, strong-base exchange moieties are substituted at haloalkylated sites which are least accessible to diffusion. The resins have improved exchange kinetics due to shortened diffusion path lengths for the chemical species being separated and improved diffusion into the resin beads due to the hydrophilic, strong-base exchange moieties.
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公开(公告)号：US5354896A
公开(公告)日：1994-10-11
申请号：US12104
申请日：1993-02-01
IPC分类号： C07C67/26
CPC分类号： C07C67/26
摘要： Strong base anion exchange resins that contain quaternary ammonium groups derived from higher molecular weight amines, such as triethylamine or tripropylamine instead of trimethylamine, have a higher reactivity for catalyzing the reaction of an epoxide compound with an acid compound to form an ester.
摘要翻译： 含有衍生自较高分子量胺（例如三乙胺或三丙胺）代替三甲胺的季铵基的强碱阴离子交换树脂具有较高的催化环氧化合物与酸化合物反应形成酯的反应性。
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公开(公告)号：US5112873A
公开(公告)日：1992-05-12
申请号：US676916
申请日：1991-03-28
申请人： William C. Pike
发明人： William C. Pike
CPC分类号： B01J45/00 , B01J41/043 , B01J41/14 , Y10S423/14
摘要： Disclosed are novel ion-exchange and chelate-exchange resins having improved exchange kinetics for separating chemical species from liquids. The resins are prepared from copolymer beads consisting of a monovinyl aromatic monomer and a cross-linking monomer. The copolymer beads are functionalized such that weak-base exchange moieties are substituted at haloalkylated sites which are most accessible to diffusion into the beads, while hydrophilic, strong-base exchange moieties are substituted at haloalkylated sites which are least accessible to diffusion. The resins have improved exchange kinetics due to shortened diffusion path lengths for the chemical species being separated and improved diffusion into the resin beads due to the hydrophilic, strong-base exchange moieties.
摘要翻译： 公开了具有改进的用于将化学物质与液体分离的交换动力学的新型离子交换和螯合交换树脂。 树脂由由单乙烯基芳族单体和交联单体组成的共聚物珠制备。 共聚物珠被官能化，使得弱碱交换部分在卤代烷基化位点被取代，其最容易扩散到珠中，而亲水的强碱交换部分在不能扩散的卤代烷基化位点被取代。 由于亲水的强碱交换部分，由于分离的化学物质的扩散路径长度缩短和树脂珠粒的扩散，树脂具有改善的交换动力学。
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