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    Fluoropolymer-carbon dioxide compositions and methods of processing fluoropolymers
    111.
    发明申请
    Fluoropolymer-carbon dioxide compositions and methods of processing fluoropolymers 失效
    含氟聚合物 - 二氧化碳组合物和加工含氟聚合物的方法

    公开(公告)号：US20030230834A1

    公开(公告)日：2003-12-18

    申请号：US10268931

    申请日：2002-10-11

    Inventor： Kenneth Wynne ,  Takako Ohsaka ,  Suresh Shenoy ,  Sadashige Irie ,  Youosuke Ohsaka

    IPC: C08J005/00

    CPC classification number: C08J9/122 ,  B01J3/008 ,  C08J2201/032 ,  C08J2203/06 ,  C08J2203/08 ,  C08J2327/12 ,  C08K3/20 ,  Y02P20/544 ,  C08L27/12

    Abstract: Fluoropolymer materials containing tetrafluoroethylene monomers, such as PTFE, are significantly swollen by supercritical carbon dioxide at high temperatures and pressures. The swollen fluoropolymer is processable by molding, extrusion, and other techniques. In addition, the fluoropolymer may be sintered at significantly lower temperatures compared to a nonswollen fluoropolymer material. The melting temperature of fluorinated polymers containing tetrafluoroethylene and triflouroethylene monomers which are swollen with supercritical carbon dioxide is significantly reduced, thereby permitting manufacturing operations such as extruding and molding to be performed at lower temperatures and with reduced risk of decomposition.

    Abstract translation: 含有四氟乙烯单体（如PTFE）的含氟聚合物材料在高温和高压下被超临界二氧化碳显着溶胀。 溶胀的含氟聚合物可通过模塑，挤出和其它技术加工。 此外，与非溶胀的含氟聚合物材料相比，含氟聚合物可以在显着更低的温度下烧结。 包含用超临界二氧化碳溶胀的四氟乙烯和三氟乙烯单体的氟化聚合物的熔融温度显着降低，从而允许诸如挤出和成型的制造操作在较低温度下进行并降低分解的风险。

    Transparent supermicrocellular polymer foams from high Tg polymers and method for manufacture
    113.
    发明授权
    Transparent supermicrocellular polymer foams from high Tg polymers and method for manufacture 失效
    来自高Tg聚合物的透明超细胞聚合物泡沫和制造方法

    公开(公告)号：US06555590B1

    公开(公告)日：2003-04-29

    申请号：US09239619

    申请日：1999-01-29

    Applicant: Seng C. Tan

    Inventor： Seng C. Tan

    IPC: C08J914

    CPC classification number: C08J9/12 ,  B29C44/10 ,  B29C44/3446 ,  C08J2201/032

    Abstract: A novel class of transparent polymeric foams from high Tg polymers comprising submicron cells and a process for their production is described. The polymers are preferably high glass transition materials and the process comprises saturating a consolidated polymer shape with an inert gas at a temperature above the glass transition temperature of the polymer and under a pressure of at least 9000 psi for a period adequate to dissolve the gas in the polymer shape and then controllably cooling the polymer shape to produce the submicron cell structure.

    Abstract translation: 描述了来自包含亚微米细胞的高Tg聚合物的新型一类透明聚合物泡沫及其生产方法。 聚合物优选是高玻璃化转变材料，并且该方法包括在高于聚合物的玻璃化转变温度的温度下并且在至少9000psi的压力下用惰性气体饱和固化的聚合物形状足以溶解气体的时间 聚合物形状，然后可控制地冷却聚合物形状以产生亚微米细胞结构。

    Expandable olefin bead polymers
    114.
    发明授权
    Expandable olefin bead polymers 有权
    可膨胀烯烃珠聚合物

    公开(公告)号：US06448300B1

    公开(公告)日：2002-09-10

    申请号：US09669733

    申请日：2000-09-26

    Applicant: Christian Maletzko ,  Klaus Hahn ,  Isidor de Grave ,  Gerd Ehrmann ,  Franz-Josef Dietzen

    Inventor： Christian Maletzko ,  Klaus Hahn ,  Isidor de Grave ,  Gerd Ehrmann ,  Franz-Josef Dietzen

    IPC: C08J918

    CPC classification number: C08J9/18 ,  C08J2201/03 ,  C08J2201/032 ,  C08J2203/12 ,  C08J2203/14 ,  C08J2203/142 ,  C08J2323/10

    Abstract: The invention relates to expandable olefin bead polymers which comprise a blowing agent with a boiling point of from −5 to 150° C., selected from the group consisting of alkanes, alkanols, ketones, ethers and esters. The particles are unfoamed and have a bulk density above 500 g/l, and can be foamed to a bulk density below 200 g/l after storage for one hour at room temperature in free contact with the atmosphere. They are prepared by impregnating polyolefin pellets in suspension in a pressure vessel with the blowing agent, cooling the batch below 100° C., reducing the pressure and isolating the particles.

    Abstract translation: 本发明涉及可膨胀的烯烃珠聚合物，其包含沸点为-5至150℃的发泡剂，其选自烷烃，链烷醇，酮，醚和酯。 颗粒未发泡并且具有高于500g / l的堆积密度，并且在与大气自由接触的室温下储存1小时后，可以发泡至200g / l以下的体积密度。 它们通过将聚烯烃粒料悬浮在用发泡剂的压力容器中浸渍而制备，将批料冷却至100℃以下，降低压力并分离颗粒。

    Method of removing low molecular weight substance from polymide precursor or polymide containing low molecular weight substance
    115.
    发明申请
    Method of removing low molecular weight substance from polymide precursor or polymide containing low molecular weight substance 有权
    从含有低分子量物质的聚酰亚胺前体或聚酰亚胺中除去低分子量物质的方法

    公开(公告)号：US20020065390A1

    公开(公告)日：2002-05-30

    申请号：US09987050

    申请日：2001-11-13

    Applicant: NITTO DENKO CORPORATION

    Inventor： Mitsuhiro Kanada ,  Takayuki Yamamoto ,  Amane Mochizuki ,  Takahiro Fukuoka

    IPC: C08G002/00

    CPC classification number: H05K1/0346 ,  C08J9/26 ,  C08J2201/032 ,  C08J2201/042 ,  C08J2203/08 ,  C08J2379/08 ,  Y02P20/544

    Abstract: A method of efficiently removing a low molecular weight substance from a polyimide precursor or polyimide in which the low molecular weight substance is dispersed as micro-domains, without using a large amount of an organic solvent. The method of removing a low molecular weight substance comprises subjecting either a polymer composition having a micro-domain structure made up of a continuous phase comprising a polyimide precursor and, dispersed therein, a discontinuous phase comprising a low molecular weight substance or a polyimide composition obtained from the polymer composition by converting the polyimide precursor into a polyimide to extraction with a combination of supercritical carbon dioxide and a co-solvent to thereby remove the low molecular weight substance. The co-solvent is preferably an aprotic polar solvent, more preferably a nitrogen compound solvent or a sulfur compound solvent.

    Abstract translation: 从低分子量物质作为微区域分散的聚酰亚胺前体或聚酰亚胺有效地除去低分子量物质的方法，而不使用大量的有机溶剂。 除去低分子量物质的方法包括使具有由包含聚酰亚胺前体的连续相构成的微区结构的聚合物组合物和分散在其中的包含低分子量物质的不连续相或获得的聚酰亚胺组合物 通过将聚酰亚胺前体转变为聚酰亚胺，通过超临界二氧化碳和共溶剂的组合提取，从而从聚合物组合物中除去低分子量物质。 共溶剂优选为非质子极性溶剂，更优选为氮化合物溶剂或硫化合物溶剂。

    Flexible, low density thermoplastic foams and methods for lowering the density and increasing the flexibility of thermoplastic foams
    116.
    发明授权
    Flexible, low density thermoplastic foams and methods for lowering the density and increasing the flexibility of thermoplastic foams 有权
    柔性，低密度热塑性泡沫以及降低密度和增加热塑性泡沫柔性的方法

    公开(公告)号：US06291539B1

    公开(公告)日：2001-09-18

    申请号：US09567938

    申请日：2000-05-10

    Applicant: David W. Kreiser ,  Allan L. Dinkel ,  Juerg Patrik Weibel

    Inventor： David W. Kreiser ,  Allan L. Dinkel ,  Juerg Patrik Weibel

    IPC: C08J900

    CPC classification number: B29C44/3453 ,  B29C44/26 ,  C08J9/40 ,  C08J2201/032 ,  C08J2300/24

    Abstract: A flexible, low density thermoplastic foam and a method for lowering the density and increasing the flexibility of a thermoplastic foam having a melting temperature and being either amorphous with a softening temperature or semicrystalline with a glass transition temperature. The method comprises the steps of (a) decreasing the pressure on the thermoplastic foam to a subatmospheric pressure, further providing that while the thermoplastic foam is under the subatmospheric pressure, the thermoplastic foam is also at a temperature in the range of less than the melting temperature and greater than the softening temperature if the thermoplastic foam is amorphous, or greater than the glass transition temperature if the thermoplastic foam is semicrystalline, whereby the thermoplastic foam expands; (b) then exposing the thermoplastic foam to a superatmospheric pressure and a secondary expansion gas for a sufficient amount of time to allow the secondary blowing gas to permeate into the thermoplastic foam; and (c) then releasing the superatmospheric pressure on the thermoplastic foam whereby the thermoplastic foam expands. With this method, it is possible to produce thermoplastic foams having densities as low as 0.008 grams/cc. Also included in this invention are insulations made from these low density foams.

    Abstract translation: 一种柔性低密度热塑性泡沫塑料，以及一种降低密度并提高具有熔融温度的热塑性泡沫塑料的柔性的方法，并且具有软化温度的无定型或玻璃化转变温度的半晶体。 该方法包括以下步骤：（a）将热塑性泡沫塑料的压力降低到低于大气压，进一步规定当热塑性泡沫体处于低于大气压的压力下时，热塑性泡沫体的温度也在小于熔化温度的范围内 如果热塑性泡沫是无定形的，则大于软化温度，如果热塑性泡沫是半结晶的，则大于玻璃化转变温度，从而使热塑性泡沫膨胀; （b）然后将热塑性泡沫体暴露于超大气压和二次​​膨胀气体足够的时间以允许二次吹入气体渗透到热塑性泡沫中; 和（c）然后释放热塑性泡沫上的超大气压力，由此热塑性泡沫膨胀。 通过这种方法，可以生产密度低至0.008克/立方厘米的热塑性泡沫塑料。 本发明还包括由这些低密度泡沫制成的绝缘体。

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