公开(公告)号：US4223206A

公开(公告)日：1980-09-16

申请号：US872050

申请日：1978-01-25

申请人： Anthony Horton ,  Thomas M. McKeon ,  Jack Preston

发明人： Anthony Horton ,  Thomas M. McKeon ,  Jack Preston

IPC分类号： C01G23/07 ,  B01D1/00 ,  B01J19/00 ,  B01J19/02 ,  C01G23/02 ,  H05B3/42 ,  F24H3/04 ,  H05B3/02

CPC分类号： H05B3/42 ,  B01D1/0017 ,  B01J19/02 ,  C01G23/022 ,  B01J2219/0218 ,  B01J2219/0286

摘要： A heating device for heating corrosive vapours includes a casing defining a vapour flow path having an inlet and an outlet. A tubular metallic electric resistance heating element is disposed in the flow path and arranged such that the vapours being heated successively pass in opposite directions along the interior and exterior of the element in flowing from the inlet to the outlet of the casing. To accomodate thermal expansion and contraction, one end of the element is connected to the casing by means of a flexible coupling there being provision to maintain at least a part of the flexible coupling immersed in a body of an electrically non-conductive liquid capable of shielding the coupling from the corrosive vapours during operation of the device. The non-conductive liquid may be maintained in the liquid state by circulation through a heat exchanger. The heating element may be made, for example, of platinum or a platinum alloy and the flexible coupling, for example, of a braid of such a metal or alloy or of tantalum. Preferably the apparatus is used to preheat titanium tetrachloride vapour for use in the manufacture of titanium dioxide by oxidation thereof. Where titanium tetrachloride vapour is to be heated the non-conductive liquid used is preferably titanium tetrachloride liquid.

摘要翻译： 用于加热腐蚀性蒸汽的加热装置包括限定具有入口和出口的蒸汽流动路径的壳体。 管状金属电阻加热元件设置在流动路径中并且布置成使得被加热的蒸汽沿元件的内部和外部沿相反方向从入口到出口流动。 为了适应热膨胀和收缩，元件的一端通过柔性联接器连接到壳体，该柔性联接件用于将柔性联接件的至少一部分浸入能够屏蔽的非导电液体的主体中 在设备运行期间与腐蚀性蒸气的耦合。 非导电液体可以通过热交换器循环而保持在液态。 加热元件可以例如由铂或铂合金制成，并且可以例如由诸如这种金属或合金或钽的编织物的柔性耦合制成。 优选地，该装置用于预热用于制造二氧化钛的四氯化钛蒸汽，通过其氧化。 在要加热四氯化钛蒸气的情况下，所用的非导电液体优选为四氯化钛液体。

公开(公告)号：US4412059A

公开(公告)日：1983-10-25

申请号：US179962

申请日：1980-08-20

申请人： William R. Krigbaum ,  Alberto Ciferri ,  Jack Preston

发明人： William R. Krigbaum ,  Alberto Ciferri ,  Jack Preston

IPC分类号： C08G63/547 ,  C08G63/60 ,  C08G69/36 ,  C08G63/00

CPC分类号： C08G69/36 ,  C08G63/547 ,  C08G63/60 ,  Y10S428/91 ,  Y10T428/24967

摘要： A polymeric material which is capable of forming high modulus, biaxially orientable structures of a cholesteric mesophase, wherein said polymeric material comprises an optically active monomer which is condensation co-polymerized with at least one p-phenylene containing monomer which is itself capable of forming a polymer exhibiting a nematic mesophase, or which is capable of being copolymerized with a second monomer to form a nematic mesophase, or which is capable of being copolymerized with racemic mixture of said optically active monomers to form a nematic mesophase, wherein the resulting copolymer is characterized by a degree of inflexibility sufficient to form a mesophase and wherein said optically active monomer is present in said polymer after copolymerization in an amount sufficient to impart optical activity to said polymer sufficient to form a cholesteric mesophase.

摘要翻译： 能够形成胆甾型中间相的高模量双轴取向结构的聚合物材料，其中所述聚合物材料包含与至少一种含对亚苯基单体缩合共聚的光学活性单体，其本身能够形成 显示向列型中间相的聚合物，或能够与第二单体共聚以形成向列型中间相，或能够与所述光学活性单体的外消旋混合物共聚以形成向列型中间相，其中所得共聚物的特征在于 通过足以形成中间相的程度不足，并且其中所述光学活性单体在共聚之后存在于所述聚合物中，其量足以赋予所述聚合物足够的光学活性以形成胆甾型中间相。

公开(公告)号：US5637653A

公开(公告)日：1997-06-10

申请号：US433254

申请日：1995-05-02

申请人： Jack Preston ,  Satoshi Idemura

发明人： Jack Preston ,  Satoshi Idemura

IPC分类号： C08G69/04 ,  C08G69/28 ,  C08K3/10 ,  C08K5/524 ,  C08L77/00 ,  C08L77/06 ,  C08L77/10

CPC分类号： C08L77/00 ,  C08G69/28 ,  C08L77/06 ,  C08L77/10

摘要： Polymer blend materials composed of an aromatic polyamide and flexible polyamide wherein the aromatic polyamide molecules are uniformly dispersed in a matrix of the flexible polyamide which are produced by first blending the flexible polyamide and monomer(s) for the aromatic polyamide in a solvent, then next polymerizing the monomer(s) in the presence of a phosphite compound, resulting in a transparent gel product capable of being fabricated into useful shaped articles without causing marked phase separation observed in polymer blend materials obtained by conventional coagulation method. The in situ formed aromatic polyamide is uniformly dispersed in the flexible polyamide matrix even in fabricated forms, giving improved transparency over the starting flexible polyamide and improved resistance toward chemicals such as acids, especially after heat treatment.

摘要翻译： 由芳族聚酰胺和柔性聚酰胺组成的聚合物共混材料，其中芳族聚酰胺分子均匀分散在柔性聚酰胺的基体中，其通过首先在柔性聚酰胺和用于芳族聚酰胺的单体在溶剂中共混而制备，接下来 在亚磷酸酯化合物的存在下聚合单体，得到透明的凝胶产物，其能够制成有用的成型制品，而不会在通过常规凝结法获得的聚合物共混材料中观察到明显的相分离。 原位形成的芳族聚酰胺即使以制造形式均匀地分散在柔性聚酰胺基质中，相对于起始柔性聚酰胺提高了透明度，并且改善了对化学物质（如酸）的耐受性，特别是在热处理后。

公开(公告)号：US4227885A

公开(公告)日：1980-10-14

申请号：US957625

申请日：1978-11-03

申请人： William L. Hofferbert, Jr. ,  Jack Preston

发明人： William L. Hofferbert, Jr. ,  Jack Preston

IPC分类号： D06M13/328 ,  D06P3/24

CPC分类号： D06M13/328 ,  D06P3/24

摘要： A process for improving tensile properties of aramid fibers and structurally related fibers is described. The process involves soaking the fibers in a liquid tertiary amine maintained at a temperature of at least 80.degree. C.

摘要翻译： 描述了改进芳族聚酰胺纤维和结构相关纤维的拉伸性能的方法。 该方法包括将纤维浸泡在保持在至少80℃的温度下的液体叔胺中

公开(公告)号：USD250417S

公开(公告)日：1978-11-28

申请号：US849457

申请日：1977-11-07

申请人： Jack Preston

设计人： Jack Preston

公开(公告)号：US4087409A

公开(公告)日：1978-05-02

申请号：US850262

申请日：1969-08-14

申请人： Jack Preston

发明人： Jack Preston

IPC分类号： C08G73/06 ,  C08G73/10 ,  C08G69/26 ,  C08G73/22

CPC分类号： C08G73/0616 ,  C08G73/06 ,  C08G73/0611 ,  C08G73/0633 ,  C08G73/1067

摘要： High molecular weight, thermally resistant heterocyclic polymers containing two or more different heterocyclic linkages occurring in an ordered sequence with aromatic linkages are prepared and solutions thereof used to spin fibers.

摘要翻译： 制备含有两个或更多个不同杂环键的高分子量，耐热杂环聚合物，其以具有芳香键的有序序列发生，并且其用于纺丝纤维的溶液。