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公开(公告)号:US5384879A
公开(公告)日:1995-01-24
申请号:US965619
申请日:1992-10-22
CPC分类号: H01B7/288 , G02B6/4427 , G02B6/443 , Y10T442/673
摘要: Lightly crosslinked aromatic polymers are suitable in water sealing applications such as geomembranes used around building sub structures and also in cable jacketing to protect submarine cables from moisture intrusion.
摘要翻译: 轻度交联的芳族聚合物适用于水密封应用,例如建筑物子结构周围使用的土工膜,还适用于电缆护套,以保护海底电缆免受水分侵入。
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公开(公告)号:US5280082A
公开(公告)日:1994-01-18
申请号:US37662
申请日:1993-03-24
IPC分类号: C08F8/36
CPC分类号: C08F8/36
摘要: Crosslinked styrenic polymers may be sulphonated in a controlled manner in an organic solvent at elevated temperature using SO.sub.3 in the presence of a trialkyl phosphate. The process does not introduce further crosslinking into the polymer permitting it to have an extremely high water uptake. The resulting polymer is useful as a hydrogel.
摘要翻译: 交联的苯乙烯聚合物可以在有机溶剂中,在高温下,在磷酸三烷基酯存在下,使用SO 3,以受控的方式磺化。 该方法不会在聚合物中引入进一步的交联,使其具有极高的吸水率。 所得聚合物可用作水凝胶。
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公开(公告)号:US5886055A
公开(公告)日:1999-03-23
申请号:US782128
申请日:1997-01-13
IPC分类号: C07C29/151 , C07C27/10 , C07C205/00
CPC分类号: C07C29/1512
摘要: A process for the production of methanol is disclosed wherein the gaseous reactants of CO, H.sub.2 and optimally CO.sub.2 are reacted in a distillation column reactor in the presence of an inert C.sub.7 -C.sub.12 component, which is boiling at the reaction temperature within the catalyst bed. The inert component is taken overhead along with the methanol and separated therefrom for reflux of the inert component back to the reactor.
摘要翻译: 公开了一种生产甲醇的方法,其中CO,H 2和最佳CO 2的气态反应物在惰性C 7 -C 12组分存在下在蒸馏塔反应器中反应,惰性C 7 -C 12组分在催化剂床内的反应温度下沸腾。 将惰性组分与甲醇一起在塔顶馏出并分离,将惰性组分回流回反应器。
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公开(公告)号:US5357034A
公开(公告)日:1994-10-18
申请号:US941731
申请日:1992-09-08
CPC分类号: C08G63/06 , B01J19/1862 , B01J19/20 , C08G63/08 , B01J2219/00058 , B01J2219/00094 , B01J2219/00103 , B01J2219/00132 , B01J2219/00153 , B01J2219/00159 , B01J2219/185
摘要: High molecular weight polylactic acid is generally produced by the polymerization of lactide. Lactide is prepared by the depolymerization of low molecular weight polylactic acid. There are difficulties in the preparation of high molecular weight polylactic acid and high purity lactide isomers due to the equilibrium between lactic acid, low molecular weight polylactic acid, high molecular weight polylactic acid, lactide and water. Further it has never been proposed to provide a continuous process to produce high molecular weight polylactic acid from lactic acid. The present invention overcomes the equilibrium problem and provides a continuous process.
摘要翻译: 高分子量聚乳酸通常通过丙交酯的聚合来制备。 丙交酯通过低分子量聚乳酸的解聚来制备。 由于乳酸,低分子量聚乳酸,高分子量聚乳酸,丙交酯和水之间的平衡,制备高分子量聚乳酸和高纯度丙交酯异构体存在困难。 此外,从未提出从乳酸制备高分子量聚乳酸的连续方法。 本发明克服了平衡问题并提供了一个连续的过程。
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公开(公告)号:US06620965B1
公开(公告)日:2003-09-16
申请号:US10093708
申请日:2002-03-08
IPC分类号: C07C67055
CPC分类号: C07C67/055 , C07C69/01 , C07C69/15
摘要: A process for producing vinyl acetate comprising reacting ethylene, acetic acid and oxygen together in at least partially liquid phase in the presence of a catalyst comprising a noble metal component.
摘要翻译: 一种生产乙酸乙烯酯的方法,包括在包含贵金属组分的催化剂的存在下,使至少部分液相中的乙烯,乙酸和氧一起反应。
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公开(公告)号:US5599997A
公开(公告)日:1997-02-04
申请号:US404095
申请日:1995-03-14
申请人: Dennis Hearn , Speros P. Nemphos
发明人: Dennis Hearn , Speros P. Nemphos
IPC分类号: B01D3/00 , C07C5/10 , C07C209/72
CPC分类号: C07C209/72 , B01D3/009 , C07C5/10 , C07C2101/14 , Y02P20/127
摘要: A process for the hydrogenation of aniline to produce cyclohexyl amine is disclosed wherein the reaction is carried out in a distillation column reactor at a hydrogen partial pressure in the range of 0.1 psia to less than 100 psia. The catalyst is prepared in the form of a catalytic distillation structure. Within the distillation reaction zone there is an internal reflux and liquid from an external reflux which cool the rising vaporous aniline condensing a portion within the bed.
摘要翻译: 公开了苯胺氢化制备环己胺的方法,其中反应在蒸馏塔反应器中在0.1psia至小于100psia范围内的氢分压下进行。 催化剂以催化蒸馏结构的形式制备。 在蒸馏反应区内,存在来自外部回流的内部回流和液体,其冷却上升的蒸气苯胺,冷凝床内部分。
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公开(公告)号:US5464878A
公开(公告)日:1995-11-07
申请号:US75118
申请日:1993-06-11
CPC分类号: C08J9/12 , C08L67/04 , C08J2367/04
摘要: A degradable polymeric foam having a density of not more than 16 lb. per cu ft. comprising a polymer alloy comprising:(i) from 50 to 100% of one or more co or homopolymers having a molecular weight of greater than 40,000 comprising the residues of one or more monomers of the Formula:--OCR.sub.1 R.sub.2 (CR.sub.3 R.sub.4).sub.n CO-- (I)or--OCH(CH.sub.3)CO-- (II) wherein in Formula I, R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently selected from the group consisting of a hydrogen atom and a C.sub.1-4 alkyl radical, and n is zero or an integer from 1 to 5, provided that when a monomer residue of Formula II is present and in Formula I n is 1 and R.sub.2, R.sub.3, and R.sub.4 are hydrogen, R.sub.1 can not be a methyl radical; and(ii) from 0 to 50 weight % of one or more polymers selected from the group consisting of polymers having a Hildebrand parameter (.sigma.) of not more than 3 MPA.sup.1/2 different from that of the one or more co or homopolymers.
摘要翻译: 一种可降解聚合物泡沫,其密度不超过16磅/立方英尺,其包含聚合物合金,其包含:(i)50至100%的一种或多种分子量大于40,000的共价或均聚物,其包含残基 的一种或多种式:-OCR 1 R 2(CR 3 R 4)n CO-(I)或-OCH(CH 3)CO-(II)的单体,其中在式I中,R 1,R 2,R 3和R 4独立地选自 的氢原子和C 1-4烷基,并且n为0或1至5的整数,条件是当存在式II的单体残基并且在式I中,n为1且R 2,R 3和R 4为 氢,R1不能是甲基; 和(ii)0至50重量%的一种或多种选自具有不超过3MPA1 / 2的Hildebrand参数(σ)的聚合物的聚合物的不同于一种或多种共聚物或均聚物的聚合物。
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公开(公告)号:US5350627A
公开(公告)日:1994-09-27
申请号:US75115
申请日:1993-06-11
IPC分类号: D04H1/58
CPC分类号: D04H1/64 , D04H1/587 , Y10S428/913 , Y10T442/2025 , Y10T442/277
摘要: Biodegradable polymers may be used as binders for impregnating or coating fibrous webs. The resulting web is degradable and also the fibers within the web may be more easily recycled.
摘要翻译: 可生物降解聚合物可用作浸渍或涂布纤维网的粘合剂。 所得的纤维网是可降解的,并且纤维网内的纤维可以更容易地再循环。
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公开(公告)号:US5300576A
公开(公告)日:1994-04-05
申请号:US770320
申请日:1991-10-03
CPC分类号: C08L67/04
摘要: The thermal properties, such as heat distortion temperature of biodegradable polymers, such as polylactic acid, polyglycolides, polybutyric acid and copolymers of butyric and valeric acid, may be increased by blending them with a polymer having Tg from 75.degree. C. to 200.degree. C. and a Hildebrand parameter (.sigma.) of not more than 3 MPA.sup.1/2 different from the biopolymer.
摘要翻译: 可以通过将Tg与Tg为75〜200℃的聚合物共混而得到的热性质,例如聚乳酸,聚乙交酯,聚丁酸,丁酸和丁酸的共聚物等生物可降解聚合物的热变形温度。 和与生物聚合物不同的不超过3MPA1 / 2的希尔德布兰德参数((Sigma))。
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公开(公告)号:US5136017A
公开(公告)日:1992-08-04
申请号:US659567
申请日:1991-02-22
CPC分类号: B01J19/245 , C08G63/08 , B01J2219/00094 , B01J2219/00132 , B01J2219/00159
摘要: Lactide monomers and copolymers may be polymerized by a continuous process using one or more continuous stirred tank reactors. The process offers productivity and product quality advantages over the batch process of polymerization.
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