-
公开(公告)号：US3616368A
公开(公告)日：1971-10-26
申请号：US3616368D
申请日：1969-05-07
发明人： ISHIGAKI ISAO , ITO AKIHIKO , IWAI TADASHI
CPC分类号： B29C71/04 , B29C2035/0827 , B29K2059/00 , C08G2/10
摘要： Polyoxymethylenes are obtained by first irradiating trioxane and/or tetraoxane with ionizing radiation, then contacting the irradiated trioxane and/or tetraoxane with nonirradiated trioxane and/or tetraoxane, and then maintaining the resulted mixture under the polymerizing condition to thereby effect polymerization of the whole system including the nonirradiated trioxane and/or tetraoxane by the action of active species formed in the irradiated trioxane and/or tetraoxane to give polyoxymethylenes readily with a minimum dosage required for such irradiation.
-
-
公开(公告)号：US3428590A
公开(公告)日：1969-02-18
申请号：US3428590D
申请日：1966-01-18
发明人： YAMASE YOSHIAKI , KUTSUMA TERUO
-
公开(公告)号：US10954332B2
公开(公告)日：2021-03-23
申请号：US16764479
申请日：2019-07-16
发明人： Takuya Okada , Daisuke Sunaga
IPC分类号： C08G2/10
摘要： A method for producing an oxymethylene copolymer which gives molded articles that are inhibited from emitting formaldehyde and can be reduced in yellowness is provided. In producing an oxymethylene copolymer, an effective polymerization initiator amount is regulated to a value within a given range, the amount being calculated from the amount of perchloric acid or a derivative thereof contained in the polymerization initiator and the amount of triethanolamine contained in all the monomers comprising trioxane and comonomers, which are starting materials for the copolymer.
-
公开(公告)号：US10781307B2
公开(公告)日：2020-09-22
申请号：US16036225
申请日：2018-07-16
发明人： Junichi Tsuzuki , Yasukazu Shikano
摘要： A polyoxymethylene resin molded article comprising 100 parts by mass of a polyoxymethylene resin (A) and 0.1 to 5 parts by mass of a sliding agent (B), wherein four or more dispersion domains of the sliding agent (B) are present in a region of 1000 nm in depth from a surface of the molded article and 12000 nm in width, and the dispersion domain has an average minor diameter of 300 nm or less, and an average major diameter of 600 nm or more and 5000 nm or less.
-
公开(公告)号：US09815934B2
公开(公告)日：2017-11-14
申请号：US14890060
申请日：2014-05-09
CPC分类号： C08G61/125 , C08G2/10 , C08G2/18 , C08G2/24 , C08G2261/12 , C08L59/00 , C08L61/00
摘要： Potentially degradable isohexide based compounds and their polymers, derived from renewable resources, are described. Degradable isohexide-based monomers and polymers obtained from renewable resources are also described. Finally, processes for synthesizing such degradable polymers via copolymerization of the isohexide-based monomers and long chain diols are disclosed.
-
公开(公告)号：US09657136B2
公开(公告)日：2017-05-23
申请号：US14442659
申请日：2013-10-25
发明人： Eiji Masuda , Tomohiro Monma , Tadahiro Horiguchi
CPC分类号： C08G65/266 , C08G2/06 , C08G2/10 , C08G2/18 , C08G2/28
摘要： A production method for a polyacetal copolymer that makes deactivation of a catalyst simple and efficient and that achieves a high polymerization yield and high quality using equipment that does not require a cleaning step and a process that involves a simple operation technique. The production method for a polyacetal copolymer uses trioxane as a main monomer and a cyclic ether and/or a cyclic formal having at least one carbon-carbon bond as a comonomer. In the production method, a predetermined heteropoly acid is used as a polymerization catalyst to perform copolymerization, a predetermined salt is added to the reaction product, melt kneading processing is performed, and the polymerization catalyst is deactivated.
-
公开(公告)号：US09163120B2
公开(公告)日：2015-10-20
申请号：US14246536
申请日：2014-04-07
申请人： Ticona GmbH
摘要： An initiator for cationic polymerization comprises a salt of a protic acid as well as a protic add. The molar ratio of protic acid to salt is in the range from 1:0.01 to 1:2000. The initiator is used for example for cationic homo- or copolymerization of trioxane, and permits stable and flexible operation of the polymerization.
摘要翻译： 用于阳离子聚合的引发剂包括质子酸的盐以及质子添加剂。 质子酸与盐的摩尔比在1:0.01至1:2000的范围内。 引发剂用于例如三恶烷的阳离子均聚或共聚，并且允许聚合的稳定和灵活的操作。
-
49.发明授权公开(公告)号：US08436066B2
公开(公告)日：2013-05-07
申请号：US12309603
申请日：2007-07-23
IPC分类号： H05B6/68 , C08G18/67 , C08G65/18 , C08G2/10 , C08F20/22 , C07D303/40 , C03C25/10 , B29D22/00 , B29D23/00 , B32B1/08 , B32B27/08 , B32B9/00 , B32B33/00
CPC分类号： C08G18/792 , C08G18/003 , C08G59/22 , C08G65/18 , C08J7/18 , C09D175/04 , G03F7/038 , G03F7/0755 , G03F7/0757 , Y10T428/1352 , Y10T428/1457 , Y10T428/31515
摘要： Compositions that can be polymerized and/or crosslinked into coatings by cationic and/or radical irradiation contain at least one photoinitiator and at least one compound having at least one isocyanate function.
摘要翻译： 可以通过阳离子和/或自由基照射聚合和/或交联成涂层的组合物含有至少一种光引发剂和至少一种具有至少一个异氰酸酯官能团的化合物。
-
公开(公告)号：US5886139A
公开(公告)日：1999-03-23
申请号：US835932
申请日：1997-04-11
申请人： Kaoru Yamamoto , Akira Nakai
发明人： Kaoru Yamamoto , Akira Nakai
摘要： To economically produce a polyacetal copolymer excellent in properties including thermal stability by copolymerizing trioxane as the main monomer through simple steps, a polyacetal copolymer is produced by copolymerizing trioxane as the main monomer using a nonvolatile protonic acid catalyst as a polymerization catalyst until the conversion reaches at least 60% (based on all monomers), and then vaporizing unreacted monomers to separate, remove, and recover the same from the polymerization system to thereby reduce the residual monomer content of the polymerization system to 5% by weight or lower.
摘要翻译： 为了通过简单的步骤经济地制备具有热稳定性优异的聚缩醛共聚物，通过使用不挥发性质子酸催化剂作为聚合催化剂将三恶烷作为主要单体进行共聚，直到转化率达到 至少60％（基于所有单体），然后蒸发未反应的单体以从聚合体系中分离，除去和回收它们，从而将聚合体系的残余单体含量降低至5重量％以下。
-
-
-
-
-
-
-
-
-
搜索结果
138 条记录 (耗时 0.016 秒)
