公开(公告)号：US3275603A

公开(公告)日：1966-09-27

申请号：US27551363

申请日：1963-04-25

申请人： TENNECO CHEM

发明人： YAKIMIK JR HARRY

IPC分类号： C08G2/04

CPC分类号： C08G2/04

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

CPC分类号： C08G2/06 ,  C08G2/04 ,  C08G2/08 ,  C08G2/18 ,  C08G2/20 ,  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

CPC分类号： C08G2/06 ,  C08G2/04 ,  C08G2/08 ,  C08G2/18 ,  C08G2/20 ,  C08G63/672

公开(公告)号：US4839407A

公开(公告)日：1989-06-13

申请号：US153118

申请日：1988-02-08

申请人： David A. Martin ,  Edward L. Ries ,  William Vanderlinde ,  Marvin J. Young

发明人： David A. Martin ,  Edward L. Ries ,  William Vanderlinde ,  Marvin J. Young

IPC分类号： C08J3/16 ,  C08G2/04 ,  C08G2/14 ,  C08G2/28 ,  C08G2/30 ,  C08J3/12

CPC分类号： C08J3/12 ,  C08G2/04 ,  C08G2/14 ,  C08G2/30 ,  C08J3/16 ,  C08J2359/00

摘要： A method for preparation of solid particulate polyacetal carboxylate. The method comprises agglomerating a solution comprising less than about 1% by weight methanol and between about 30% by weight and about 60% by weight polyacetal carboxylate onto a substrate to produce a free-flowing particulate solid. The solid comprises between about 30% by weight and about 55% by weight polyacetal carboxylate. The polyacetal carboxylate corresponds to the formula: ##STR1## where n is at least about 4 and represents the average chain length of the polyacetal carboxylate in the mixture, R.sub.1 and R.sub.2 are independently selected chemically stable groups that stabilize the polymer against rapid depolymerization in alkaline solution, and M is selected from the group consisting of alkali metals, ammonium, alkyl groups of 1 to about 4 carbon atoms, tetraalkyl ammonium groups, and alkanolamine groups having from 1 to about 4 carbon atoms in the alkyl chain.

公开(公告)号：US4539387A

公开(公告)日：1985-09-03

申请号：US637578

申请日：1984-08-03

申请人： Leslie M. Blair

发明人： Leslie M. Blair

IPC分类号： C08G2/00 ,  C08G2/04 ,  C08G2/06 ,  C08G2/08

CPC分类号： C08G2/06 ,  C08G2/08

摘要： A diquaternary ammonium compound, especially a diquaternary ammonium diacetate in which at least one substituent of nitrogen atom is an alkyl group having at least 14 carbon atoms and the total number of carbon atoms of all nitrogen substituents is at most 44, is an excellent formaldehyde polymerization initiator, which gives large particle size polyformaldehyde in a mixture of aliphatic and aromatic hydrocarbons. Polyformaldehyde is a commercial resin suitable, among others, in applications requiring engineering resins having high strength and wear resistance.

摘要翻译： 二季铵化合物，特别是其中至少一个氮原子取代基为具有至少14个碳原子的烷基和全部氮取代基的总碳原子数最多为44的二季铵化合物是优异的甲醛聚合 引发剂，其在脂族和芳族烃的混合物中产生大的粒度聚甲醛。 聚甲醛是一种适用于需要具有高强度和耐磨性的工程树脂的应用的商业树脂。

公开(公告)号：US4380620A

公开(公告)日：1983-04-19

申请号：US293213

申请日：1981-08-12

申请人： Kazuhiko Matsuzaki ,  Minoru Hamada ,  Hisaya Sakurai

发明人： Kazuhiko Matsuzaki ,  Minoru Hamada ,  Hisaya Sakurai

IPC分类号： C08G2/04 ,  C08G2/08 ,  C08G2/18 ,  C08G65/26

CPC分类号： C08G65/2603 ,  C08G2/04 ,  C08G2/08 ,  C08G2/18

摘要： In a process for preparing polyoxymethylenes by polymerizing formaldehyde in the presence of an anionic polymerization catalyst, the use of a polyhydric alcohol having at least three alcoholic hydroxyl groups in the molecule permits the preparation of polyoxymethylenes which have desired molecular weights along with improved melt fluidity and which are excellent in processability.

摘要翻译： PCT No.PCT / JP80 / 00307 Sec。 371日期1981年8月12日 102（e）日期1981年8月12日PCT提交1980年12月16日PCT公布。 第WO81 / 01712号公报 日期：1981年6月25日。在阴离子聚合催化剂存在下通过聚合甲醛制备聚氧化甲烯的方法中，在分子中使用具有至少三个醇羟基的多元醇允许制备具有所需分子 重量以及改善的熔体流动性，并且加工性能优异。

公开(公告)号：US4377667A

公开(公告)日：1983-03-22

申请号：US270555

申请日：1981-06-04

申请人： Hisaya Sakurai ,  Minoru Hamada ,  Kazuhiko Matsuzaki

发明人： Hisaya Sakurai ,  Minoru Hamada ,  Kazuhiko Matsuzaki

IPC分类号： C08F4/34 ,  C08G2/04 ,  C08G2/34 ,  C08G2/38 ,  C08G6/00

CPC分类号： C08G2/38 ,  C08G2/04 ,  C08G2/34

摘要： A polyacetal suitable for moldings which are excellent in lubricity, wear and antistatic properties, which has at least one terminal of its linear polymer molecule capped with an alkylene oxide adduct of an alcohol or a carboxylic acid, which adduct is of the formula ##STR1## wherein R.sub.o is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.o 's may be the same or different, R.sub.1 is an alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.2 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, m is from 2 to 6, and n is from 1 to 1,000; the number average molecular weight of said polyacetal being in the range from 10,000 to 500,000 excluding the terminal group.

摘要翻译： 适用于润滑性，耐磨性和抗静电性优异的模制品的聚缩醛，其具有至少一个末端，其直链聚合物分子被醇或羧酸的烯化氧加合物封端，该加成物具有式“IMAGE” 其中Ro是氢原子，烷基，取代的烷基，芳基或取代的芳基，R a可以相同或不同，R 1是烷基，取代的烷基，芳基或取代的芳基，R 2是 氢原子，烷基，取代的烷基，芳基或取代的芳基，m为2至6，n为1至1,000; 除了末端基以外，所述聚缩醛的数均分子量为10,000〜500,000。

公开(公告)号：US3557058A

公开(公告)日：1971-01-19

申请号：US3557058D

申请日：1968-04-16

申请人： MONTEDISON SPA

发明人： FIORE LEONARDO ,  NISSIM GIORGIO ,  CRESPI ELIO

IPC分类号： C08G2/00 ,  C08G2/04 ,  C08G1/04 ,  C08G1/22

CPC分类号： C08G2/06 ,  C08G2/04 ,  C08G2/10

摘要： MODIFIED OXYMETHYLENE HOMOPOLYMERS AND COPOLYMERS HAVING PARTICULAR TERMINAL GROUPS AND CHARACTERIZED BY CONTROLLED MOLECULAR WEIGHT AND INCREASED THERMAL STABILITY ARE OBTAINED BY POLYMERIZING TRIOXANE OR MIXTURES THEREOF WITH OTHER MONOMERS IN THE PRESENCE OF PARTICULAR CHAIN-TRANSFER AGENTS.

公开(公告)号：US11981772B2

公开(公告)日：2024-05-14

申请号：US17275755

申请日：2019-09-10

申请人： ASAHI KASEI KABUSHIKI KAISHA

发明人： Chihiro Suemitsu ,  Hitoshi Mizomoto ,  Kenji Ebara ,  Tatsuya Suzuki

IPC分类号： C08G2/04 ,  C08G2/06 ,  C08G2/10 ,  C08G2/18

CPC分类号： C08G2/10 ,  C08G2/04 ,  C08G2/06 ,  C08G2/18 ,  C08G2650/22 ,  C08G2650/38

摘要： Polyoxymethylene, where a ratio of a low molecular weight component having a molecular weight of 10,000 or less in a molecular weight distribution is 7.0% or less of the total, and the molecular weight distribution is obtained by measurement by gel permeation chromatography (GPC) using polymethyl methacrylate (PMMA) as a standard substance.

公开(公告)号：US20220056259A1

公开(公告)日：2022-02-24

申请号：US17293566

申请日：2020-06-10

申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC.

发明人： Takuya OKADA ,  Daisuke SUNAGA

IPC分类号： C08L59/04 ,  C08G2/04 ,  C08G2/06 ,  C08G2/10 ,  C08K5/55

摘要： It has been desired to develop a method for producing an oxymethylene polymer, by which an oxymethylene polymer having a high polymerization degree can be produced with high efficiency while suppressing increase in the amount of generation of an odor. Further, it has been desired to develop an oxymethylene polymer resin composition, wherein generation of an odor at the time of molding or after molded to obtain a molded body is suppressed. The present invention provides a method for producing an oxymethylene polymer, wherein the oxymethylene polymer is produced by polymerizing a cyclic oligomer of formaldehyde, and wherein a boron trifluoride compound and an aryl fluoride boron compound are used as polymerization catalysts. The present invention also provides an oxymethylene polymer resin composition containing an oxymethylene polymer and a derivative of an aryl fluoride boron compound.