-
公开(公告)号：US20160145384A1
公开(公告)日：2016-05-26
申请号：US14904552
申请日：2014-05-23
发明人： Tomoyuki HIRANO , Akira ITO
IPC分类号： C08G65/26
摘要： Provided is a method for producing an oxymethylene copolymer continuously and with high polymerization yield, whereby it becomes possible to improve heat stability and the formaldehyde generation amount while keeping MD resistance and folding endurance. Provided is a method for producing an oxymethylene copolymer, which comprises the steps of: carrying out a copolymerization reaction of a monomer raw material comprising trioxane and 1,3-dioxolane in an amount of 7.0 to 22 mass % relative to the amount of trioxane in the presence of boron trifluoride in an amount of 0.03 to 0.10 mmol relative to 1 mol of trioxane and sterically hindered phenol in an amount of 0.006 to 2.0 mass % relative to the amount of trioxane; and adding a polymerization terminator to a reaction system at the point of time at which the polymerization yield of the copolymer becomes 92% or more to terminate the polymerization.
摘要翻译： 提供了一种连续地生产甲醛共聚物并且具有高聚合产率的方法，从而可以在保持MD抗性和耐折性的同时提高热稳定性和甲醛生成量。 提供一种甲醛共聚物的制造方法，其包括以下步骤：相对于三恶烷的量，相对于三恶烷的量，进行包含三恶烷和1,3-二氧戊环的单体原料的共聚反应，其量为7.0〜22质量％ 相对于三恶烷的量，相对于1摩尔三恶烷和空间位阻酚为0.03〜0.10摩尔的三氟化硼的存在量为0.006〜2.0质量％ 并在共聚物的聚合产率达到92％以上的时间点向反应体系中加入聚合终止剂以终止聚合。
-
2.发明授权公开(公告)号：US08742065B2
公开(公告)日：2014-06-03
申请号：US13482158
申请日：2012-05-29
IPC分类号： C08G65/34
摘要： Oxymethylene polymers having a bimodal distribution or having a distribution of higher modality and having a targeted content of a low molecular weight fraction of from 1 to 5 percent by mass are described. Moldings of these polymers are distinguished by high low-temperature notched impact strength associated with a high modulus of elasticity.
摘要翻译： 描述具有双峰分布或具有较高模态分布并且具有1至5质量％的低分子量分数的目标含量的甲醛聚合物。 这些聚合物的模制品通过与高弹性模量相关的高低温缺口冲击强度来区分。
-
公开(公告)号：US3781251A
公开(公告)日：1973-12-25
申请号：US3781251D
申请日：1971-09-29
申请人： DU PONT
发明人： HERMES M
IPC分类号： B29D11/00 , C07F7/18 , C08F30/08 , C08F214/18 , C08G2/00 , C09D143/04 , C08F15/02 , C08F15/06
CPC分类号： C08G2/04 , B29D11/00865 , C07F7/1804 , C08F30/08 , C08F214/188 , C08G2/08 , C08G2/10 , C09D143/04 , C08L2666/54
摘要： CH2=CH-O-X-SI(-R)Y(-O-R'')(3-Y)
A SILYL VINYL ETHER HAVING THE FORMULA
WHEREIN X IS AN ALKYLENE GROUP OF 2 TO 10 CARBON ATOMS, OR AN ALKYLENEOXYALKYLENE GROUP OF 4 TO 16 CARBON ATOMS, R IS AN ALKYL GROUP OF 1 TO 6 CARBON ATOMS, Y IS 0, 1 OR 2, AND R'' IS AN ALKYL GROUP OF 1 TO 6 CARBON ATOMS; SILYL FLUOROOLEFIN POLYMERS MADE BY POLYMERIZING THE SILYL VINYL ETHER WITH FLUOROOLEFINS, AND, OPTIONALLY, WITH OTHER VINYL ETHERS AND/OR ETHYLENE AND/OR PROPYLENE AND/OR FLUORINE-SUBSTITUTED VINYL ETHER; COMPOSITIONS CONTAINING POLYSILICIC ACID AND SILYL FLUOROOLEFIN POLYMER MADE BY POLYMERIZING THE SILYL VINYL ETHER WITH FLUOROOLEFIN, AND, OPTIONALLY, WITH OTHER VINYL ETHERS; COATING COMPOSITIONS CONTAINING A COMPATIBLE SOLVENT AND THE POLYSILICIC ACID/ SILYL FLUOROOLEFIN POLYMER COMPOSITION; ARTICLES COATED WITH THE SILYL-FLUOROOLEFIN POLYMER-POLYSILICIC ACID COMPOSITION AND A PROCESS FOR COATING THEM; AND POLYMERS MADE BY POLYMERIZING THE SILYL VINYL ETHER WITH FORMALDEHYDE OR TRIOXANE AND, OPTIONALLY, WITH ALKYLENE OXIDES AND/OR DIOXOLANE AND/OR ALKYL VINYL ETHERS.-
4.发明授权Polymerization of formaldehyde in the presence of a polyvalent metal chelate of a beta-diketone 失效在β-二酮的多价金属螯合物的存在下聚合甲醛
公开(公告)号：US3305529A
公开(公告)日：1967-02-21
申请号：US29384363
申请日：1963-07-09
申请人： TENNECO CHEM
发明人： REYNOLDS RICHARD E
IPC分类号： C08G2/00 , C08G2/04 , C08G63/672
-
公开(公告)号：US3216972A
公开(公告)日：1965-11-09
申请号：US22511362
申请日：1962-09-20
申请人： TENNECO CHEM
发明人： HENRI SIDI
IPC分类号： C08G2/00 , C08G2/04 , C08G63/672
-
6.发明申请METHOD FOR PRODUCING POLYOXYMETHYLENE DIMETHYL ETHERS FROM FEEDSTOCK OF CONCENTRATED FORMALDEHYDE 审中-公开浓缩甲醛的原料生产聚氧乙烯二甲基醚的方法公开(公告)号：US20160168307A1
公开(公告)日：2016-06-16
申请号：US14965571
申请日：2015-12-10
申请人： Dongfang Hongsheng New Energy Application Technology Research Institute Co., Ltd , Jiangsu Kaimao Chemical Technology Co., Ltd , China University Of Petroleum (Eastern China)
发明人： Hongyan SHANG , Zhengpeng HONG , Zimao YE , Jiayong XIANG , Zhenzhen XUE
IPC分类号： C08G16/02
摘要： The present invention pertains to the technical field of energy resource chemical industry, and in particular relates to a process for producing polyoxymethylene dimethyl ethers by directly using concentrated formaldehyde aqueous solution as feedstock to catalytically react with methanol and/or methylal in a fixed bed reactor. The method of the present invention uses concentrated formaldehyde aqueous solution with a concentration of over 80% by weight to react with methanol and/or methylal, in the presence of an acidic catalyst, to produce the required polyoxymethylene dimethyl ethers. As compared with using paraformaldehyde powder as feedstock, the method of the present invention accelerates the depolymerization process of paraformaldehyde, thus significantly reduces the time required for product synthesis and makes the synthesis reaction able to be carried out in a fixed bed reactor; meanwhile, as compared with using formaldehyde aqueous solution with a low concentration as feedstock, the method of the present invention also significantly increases the yield rate of the target product.
摘要翻译： 本发明涉及能量化学工业的技术领域，特别涉及通过直接使用浓缩甲醛水溶液作为原料在固定床反应器中与甲醇和/或甲缩醛进行催化反应来生产聚甲醛二甲醚的方法。 本发明的方法使用浓度超过80重量％的浓甲醛水溶液与甲醇和/或甲缩醛在酸性催化剂存在下反应，生成所需的聚甲醛二甲醚。 与使用多聚甲醛粉末作为原料相比，本发明的方法加速了多聚甲醛的解聚过程，从而显着减少了产物合成所需的时间，使合成反应能够在固定床反应器中进行; 同时，与使用低浓度的甲醛水溶液作为原料相比，本发明的方法也显着提高了目标产物的产率。
-
公开(公告)号：US20160102190A1
公开(公告)日：2016-04-14
申请号：US14892319
申请日：2014-05-23
发明人： Akira ITO , Sunao MIKAMI
摘要： Provided is a method for producing an oxymethylene copolymer having excellent extrusion moldability and reduced voids in a molded article without lowering the inherent performance of an oxymethylene copolymer. Provided is a method for producing an oxymethylene copolymer, including: a step for copolymerizing a monomer raw material containing trioxane and 5-7 mass % of 1,3-dioxolane relative to the trioxane, in the presence of 0.025-0.07 mmol of boron trifluoride per mol of trioxane and 0.006-2.0 mass % of sterically hindered phenol relative to the trioxane; a step for adding a polymerization terminator to the reaction system when the polymerization yield of this copolymer has reached 92% or higher, and terminating polymerization; and a thermal stabilization step for heating and melting the crude oxymethylene copolymer in the presence of 0.05-5 mass % of an antioxidant and 0.005-5 mass % of a nitrogen-containing compound relative to the crude oxymethylene copolymer.
摘要翻译： 提供一种在不降低甲醛共聚物的固有性能的情况下，在模塑制品中制备具有优异的挤出成型性和减小的空隙的甲醛共聚物的方法。 提供一种甲醛共聚物的制造方法，其包括：在0.025-0.07mmol三氟化硼的存在下，使含有三恶烷的单体原料和5-7质量％的1,3-二氧戊环相对于三恶烷共聚的工序 相对于三恶烷，每摩尔三恶烷和0.006-2.0质量％的空间位阻酚; 当该共聚物的聚合产率达到92％以上并终止聚合时，向反应体系中加入聚合终止剂的步骤; 以及相对于粗制甲醛共聚物，在0.05-5质量％的抗氧化剂和0.005-5质量％的含氮化合物的存在下加热和熔融粗制甲醛共聚物的热稳定步骤。
-
8.发明申请公开(公告)号：US20120232246A1
公开(公告)日：2012-09-13
申请号：US13482158
申请日：2012-05-29
IPC分类号： C08G65/06
摘要： Oxymethylene polymers having a bimodal distribution or having a distribution of higher modality and having a targeted content of a low molecular weight fraction of from 1 to 5 percent by mass are described. Moldings of these polymers are distinguished by high low-temperature notched impact strength associated with a high modulus of elasticity.
摘要翻译： 描述具有双峰分布或具有较高模态分布并且具有1至5质量％的低分子量分数的目标含量的甲醛聚合物。 这些聚合物的模制品通过与高弹性模量相关的高低温缺口冲击强度来区分。
-
公开(公告)号：US06756475B2
公开(公告)日：2004-06-29
申请号：US10203285
申请日：2002-08-08
申请人： Marian Mours , Rainer Anderlik , Gitta Egbers , Michael Kirschey , Martin Roos
发明人： Marian Mours , Rainer Anderlik , Gitta Egbers , Michael Kirschey , Martin Roos
IPC分类号： C08G6534
CPC分类号： C08G2/10 , B29C47/0011 , B29C47/50 , B29C67/246 , B29K2059/00 , C08G2/04 , C08G2/18 , C08G2/28
摘要： Continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and also, if desired, in the presence of regulators, where during the polymerization both the monomers and the polymer are present in molten form and, if desired, the polymer is then deactivated, and the melt is discharged, cooled and pelletized, which comprises discharging, cooling and pelletizing the polymer at an elevated pressure and in the presence of a liquid.
摘要翻译： 在阳离子引发剂的存在下，以及如果需要，在调节剂的存在下，通过单体的本体聚合制备聚甲醛均聚物或共聚物的连续方法，其中在聚合期间单体和聚合物都以熔融形式存在， 如果需要，聚合物然后失活，并且熔体被排出，冷却和造粒，其包括在升高的压力下和在液体存在下排出，冷却和造粒聚合物。
-
公开(公告)号：US06506850B1
公开(公告)日：2003-01-14
申请号：US09763372
申请日：2001-02-21
申请人： Noritaka Tanimura , Atushi Nanasawa
发明人： Noritaka Tanimura , Atushi Nanasawa
IPC分类号： C08L6102
摘要： A polyoxymethylene copolymer having a melting point of 167° to 173° C. and containing a low molecular weight polyoxymethylene copolymer in an amount of not higher than 5000 ppm, and a composition thereof. The copolymer is obtainable by subjecting unstable terminal groups to heat treatment in the presence of 0.05 to 50 ppm by weight of a quaternary ammonium compound. Further, the above composition is used for working parts such as a gear and a cam; apparatuses for image, music and telecommunication; interior and exterior parts for an automobile; and the like.
摘要翻译： 熔点167〜173℃，含有不高于5000ppm的低分子量聚甲醛共聚物的聚甲醛共聚物及其组合物。 共聚物可以通过在0.05〜50重量ppm的季铵化合物的存在下对不稳定的端基进行热处理而得到。 此外，上述组合物用于诸如齿轮和凸轮的工作部件; 图像，音乐和电讯设备; 汽车内外部件; 等等
-
-
-
-
-
-
-
-
-
搜索结果
42 条记录 (耗时 0.018 秒)
