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21.发明授权Process for preparation of oxymethylene polymers, selected polymers, and their use 失效制备甲醛聚合物，选择的聚合物及其用途的方法公开(公告)号：US07812110B2
公开(公告)日：2010-10-12
申请号：US11643131
申请日：2006-12-21
IPC分类号： C08G12/00
摘要： A process is described for preparation of oxymethylene homo- and copolymers. This encompasses heterogeneous polymerization of a monomer which forms oxymethylene groups in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by the deactivation of the polymer in a homogeneous phase via treatment with a basic aprotic solvent or with an aprotic solvent which comprises a base. Oxymethylene homopolymers with very high stability are also described.
摘要翻译： 描述了制备甲醛均聚物和共聚物的方法。 这包括在甲醛缩醛和阳离子聚合引发剂存在下形成甲醛基的单体的非均相聚合，然后通过用碱性非质子溶剂或非质子溶剂处理使均相中的聚合物失活 其包括基座。 还描述了具有非常高稳定性的亚甲基均聚物。
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公开(公告)号：US20080272052A1
公开(公告)日：2008-11-06
申请号：US11665028
申请日：2005-10-06
IPC分类号： B01D61/36 , C07D317/12
CPC分类号： B01D61/362 , B01D53/22 , C07D317/12
摘要： Processes are described which comprise: (a) providing a mixture comprising a cyclic formal and water, wherein the mixture has a cyclic formal concentration and a water concentration; (b) bringing the mixture into contact with an organically selective membrane; (c) creating a pressure differential across the membrane; and (d) obtaining a permeate having a lower water concentration and a higher cyclic formal concentration than the mixture, and a retentate having a higher water concentration and a lower cyclic formal concentration than the mixture.
摘要翻译： 描述了方法，其包括：（a）提供包含环状缩甲醛和水的混合物，其中所述混合物具有环形形式浓度和水浓度; （b）使混合物与有机选择性膜接触; （c）跨过膜产生压力差; 和（d）获得具有比混合物低的水浓度和较高的环状甲醛浓度的渗透物，以及具有比混合物更高的水浓度和更低的环状甲醛浓度的渗余物。
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23.发明申请Process for preparation of oxymethylene polymers in a homogeneous phase, and use 失效在均相中制备甲醛聚合物的方法，并使用公开(公告)号：US20070185308A1
公开(公告)日：2007-08-09
申请号：US11643223
申请日：2006-12-21
IPC分类号： C08G65/34
摘要： A process and an apparatus are described for preparation of oxymethylene polymers. This process encompasses polymerization, in a homogeneous phase, of a monomer which forms oxymethylene groups, as far as 90% of maximum conversion in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by deactivation of the reaction mixture. The resultant oxymethylene polymers have alkyl ether end groups and are extremely stable.
摘要翻译： 描述了制备甲醛聚合物的方法和装置。 该方法包括在均相中聚合形成甲醛基的单体，在甲醛缩醛和阳离子聚合引发剂的存在下，最大转化率为90％，随后反应混合物失活。 所得的甲醛聚合物具有烷基醚端基并且非常稳定。
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公开(公告)号：US20060058537A1
公开(公告)日：2006-03-16
申请号：US10538787
申请日：2003-12-12
IPC分类号： C07D323/06
CPC分类号： C07D323/06
摘要： The invention relates to a process for preparing trioxane from aqueous formaldehyde solutions in the presence of acidic catalysts. The reaction of the formaldehyde to give trioxane takes place in a reaction column equipped with a circulation evaporator, and the formaldehyde solution used as the starting solution is mixed with a sidestream from the bottom of the reaction column and fed to the upper section of the reaction column via a tubular reactor. The process is notable for a low energy requirement and little by-product formation.
摘要翻译： 本发明涉及一种在酸性催化剂存在下由甲醛水溶液制备三恶烷的方法。 甲醛与三氧杂环己烷的反应在装有循环蒸发器的反应塔中进行，用作起始溶液的甲醛溶液与反应塔底部的侧流混合，并进料至反应的上部 柱通过管式反应器。 该过程对于低能量需求和小的副产物形成是显着的。
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25.发明授权Process for preparation of polymer blends composed of polyoxymethylenes and of thermoplastic elastomers 失效由聚甲醛和热塑性弹性体组成的聚合物共混物的制备方法公开(公告)号：US07906594B2
公开(公告)日：2011-03-15
申请号：US11520415
申请日：2006-09-13
IPC分类号： C08L61/02
CPC分类号： C08L59/00 , C08L75/04 , Y10T428/31942 , C08L2666/20
摘要： The invention relates to a process for preparation of polymer blends comprising at least one polyoxymethylene and at least one thermoplastic elastomer, where the thermoplastic elastomer is micropelletized by a pelletizing process and the pellets obtained in a) are dispersed in the polyoxymethylene matrix via melting of the components and mixing of these at low shear forces, and also to the use of micropelletized thermoplastic elastomers for preparation of polyoxymethylenes with low formaldehyde emission.
摘要翻译： 本发明涉及一种制备包含至少一种聚甲醛和至少一种热塑性弹性体的聚合物共混物的方法，其中热塑性弹性体通过造粒工艺进行微胶体化，并且将a）中获得的颗粒分散在聚甲醛基体中， 组分和这些在低剪切力下的混合，以及使用微胶体化热塑性弹性体制备低甲醛释放的聚甲醛。
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公开(公告)号：US20080182966A1
公开(公告)日：2008-07-31
申请号：US12058197
申请日：2008-03-28
IPC分类号： C08G65/34
CPC分类号： C08G2/38
摘要： Copolymers are described containing blocks of the structural repeat units of the formula I and blocks containing structural units of the formula II [—O—CH2—]x, (I) [—O—R1—], (II) where R1 is a divalent radical derived from a hydroxy-terminated aliphatic or cycloaliphatic oligomer or polymer which, where appropriate, has ether groups and/or carbonyloxy groups in the chain, and x is a whole number, at least 10.The copolymers may be used for producing moldings.
摘要翻译： 描述共聚物，其包含式I的结构重复单元的嵌段和含有式II的结构单元的嵌段<？in-line-formula description =“In-line Formulas”end =“lead”→[ - O-CH （I）<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula- 公式描述=“在线公式”end =“lead”？> [ - OR 1 - ]，（II）<？in-line-formula description =“In-line Formulas”end = 其中R 1是衍生自羟基封端的脂族或脂环族低聚物或聚合物的二价基团，其在适当的情况下在链中具有醚基和/或羰氧基，x 是整数，至少为10.共聚物可用于生产模制品。
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公开(公告)号：US07001959B2
公开(公告)日：2006-02-21
申请号：US10700195
申请日：2003-11-03
IPC分类号： C08G65/00
CPC分类号： C08G2/38
摘要： Copolymers are described containing blocks of the structural repeat units of the formula I and blocks containing structural units of the formula II [—O—CH2—]x, (I) [—O—R1—], (II) where R1 is a divalent radical derived from a hydroxy-terminated aliphatic or cycloaliphatic oligomer or polymer which, where appropriate, has ether groups and/or carbonyloxy groups in the chain, and x is a whole number, at least 10. The copolymers may be used for producing moldings.
摘要翻译： 描述了包含式I的结构重复单元的嵌段和含有结构单元的嵌段的共聚物
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公开(公告)号：US5608030A
公开(公告)日：1997-03-04
申请号：US290377
申请日：1994-08-15
CPC分类号： B01J19/2415 , C08G2/10 , C08G2/30 , B01J2219/00162 , B01J2219/00166
摘要： Process for continuous preparation of homo- and copolyoxymethylenes with stable end groups in a homogeneous phase, in which in a tubular reactor with static mixing elements cyclic formaldehyde oligomers are polymerized in the presence of protonic acids as initiators in amounts of 0.005 to 500 ppm in a polymerization zone, in which the residence time of the reaction components in this zone is 0.1 to 10 min and in which the initiator is deactivated immediately after polymerization, there being a fluid transition between the polymerization and deactivator zones which is determined solely by the addition of deactivator, and in which, besides deactivation, stabilization of the chain ends is carried out in the presence of residual monomers, with the volatile constituents being removed from the reaction mixture in a subsequent vent unit. Stabilization is carried out in the presence of alkaline substances, either at temperatures of 150.degree. C. to 250.degree. C., if necessary in the presence of water or primary alcohols, or at 175.degree. C. to 250.degree. C. in the absence of these additives.
摘要翻译： 在均相中连续制备具有稳定端基的均聚和共聚氧亚甲基的方法，其中在具有静态混合元件的管式反应器中，环状甲醛低聚物在质子酸作为引发剂存在下聚合，其量为0.005-500ppm 聚合区，其中反应组分在该区域中的停留时间为0.1至10分钟，其中引发剂在聚合后立即失活，在聚合和失活区之间存在流体转变，其仅通过加入 除去失活之外，在残留单体的存在下进行链端的稳定化，其中挥发性成分在随后的通风单元中从反应混合物中除去。 在碱性物质的存在下，如果需要，在水或伯醇的存在下，或在175℃至250℃下，在不存在碱的条件下，在碱性物质的存在下，在150℃至250℃的温度下进行稳定化 的这些添加剂。
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公开(公告)号：US5508448A
公开(公告)日：1996-04-16
申请号：US176105
申请日：1993-12-30
申请人： Gerhard Emig , Benno Kruger , Frank Kern , Michael Hoffmockel , Karl-Friedrich Muck , Gunter Sextro
发明人： Gerhard Emig , Benno Kruger , Frank Kern , Michael Hoffmockel , Karl-Friedrich Muck , Gunter Sextro
IPC分类号： B01J27/198 , C07B61/00 , C07D323/06
CPC分类号： C07D323/06
摘要： A process for the catalytic preparation of trioxane from formaldehyde in the gas phase employs a catalyst comprising vanadyl hydrogenphosphate hemihydrate which may be unactivated or activated by steam.No byproducts were obtained in the process and the space-time yield is high. Deposits in the reactor do not occur.
摘要翻译： 在气相中从甲醛催化制备三恶烷的方法采用包含可以未被活化或被蒸汽活化的磷酸氢氧化钒半水合物的催化剂。 在该过程中没有获得副产物，时空产量高。 反应器中的沉积物不会发生。
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公开(公告)号：US07301055B2
公开(公告)日：2007-11-27
申请号：US10451469
申请日：2001-11-19
CPC分类号： C08G2/24 , C07C45/002 , C07C45/38 , C07C45/82 , C07C45/85 , C07D323/06 , C08G2/08 , C08G2/10 , Y02P20/127 , C07C47/04
摘要： Process for removing methanol from formaldehyde-containing solutions. The present invention relates to a process for removing methanol from formaldehyde-containing solutions, with methanol being converted into formaldehyde dimethyl acetal by reactive distillation in the presence of an acidic fixed-bed catalyst, and the resultant mixture comprising methanol, formaldehyde dimethyl acetal and possibly other impurities being distilled off.
摘要翻译： 从含甲醛溶液中除去甲醇的方法。 本发明涉及一种从含甲醛溶液中除去甲醇的方法，甲醇通过反应蒸馏在酸性固定床催化剂存在下转化为甲醛二甲缩醛，所得混合物包含甲醇，甲醛二甲基缩醛和可能的 其他杂质被蒸馏掉。
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