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公开(公告)号：US20230050758A1
公开(公告)日：2023-02-16
申请号：US17788618
申请日：2020-12-21
申请人： NOF CORPORATION
发明人： Ryo KAWAHARA , Atsushi SATO , Midori HIRAI , Kyu TAKEUCHI
IPC分类号： C08G65/30 , C08G65/325
摘要： A method for purifying a polyethylene glycol compound represented by formula [1], including a Step (A) of dissolving the compound represented by formula [1] in an organic solvent having a Hildebrand solubility parameter of 8 to 10 (cal/cm3)1/2 to obtain a solution, and a Step (B) of mixing the solution with 0.1 to 1 part by mass of an adsorbent made from a hydrotalcite having a specific surface area of 50 to 200 m2/g with respect to 1 part by mass of the compound of the formula [1] to prepare a slurry, where Z, Y1, Y2, A, Polymer, X, a, b, l and m are as defined herein.
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2.发明授权公开(公告)号：US11572440B2
公开(公告)日：2023-02-07
申请号：US16793339
申请日：2020-02-18
申请人： Covestro LLC
发明人： Daniel R. Wagner , Brian L. Neal
摘要： Disclosed are methods for purifying polyols containing oxyalkylene units that is an alkali metal catalyzed alkoxylation reaction product of an alkylene oxide and an H-functional starter. The methods include neutralizing the alkali metal ions with an aqueous solution comprising water and sulfuric acid, in which: (i) the sulfuric acid is present in an amount of no more than 5% by weight, based on the total weight of the aqueous solution, and (ii) the sulfuric acid is used in an amount of 2% to 10% more than the theoretical amount necessary to neutralize all of the alkali metal ions present. The methods can produce polyols having a low content of 2-methyl-2-pentenal.
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公开(公告)号：US11414514B2
公开(公告)日：2022-08-16
申请号：US16470306
申请日：2017-12-28
发明人： Erika Nobukuni , Takashi Yabuta
摘要： The present invention aims to provide a method of producing a polyether polyol having a low aldehyde content, the method including simpler steps; and a method of producing polyurethane foam having a reduced amount of aldehyde volatilization. The present invention provides a method of producing a polyether polyol (F) including step (1) of obtaining a crude polyether polyol composition (D2) having a pH higher than 5.0 by contact of a crude polyether polyol composition (D1) containing a polyether polyol (A) with an acid catalyst (B) in the presence of water, the polyether polyol (A) being obtainable by ring-opening polymerization of an alkylene oxide with an active hydrogen compound; and step (2) of removing a volatile component containing an aldehyde (C) after step (1).
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公开(公告)号：US20220227929A1
公开(公告)日：2022-07-21
申请号：US17596357
申请日：2020-07-29
发明人： Marinus A. Bigi , Arjun Raghuraman
摘要： A process for purifying a polyether polyol including treating the polyether polyol with a mixture of: (i) a sulfonic acid catalyst, wherein the catalyst includes a substituted or unsubstituted alkyl group of at least 6 carbon atoms, and (ii) water to reduce residual levels of acetal linkages present in the polyether polyol; a purified polyether polyol prepared using the above treatment process; and a polyurethane product prepared by reacting the above purified polyether polyol and an isocyanate.
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公开(公告)号：US20210388161A1
公开(公告)日：2021-12-16
申请号：US17284378
申请日：2019-10-11
申请人： Nektar Therapeutics
IPC分类号： C08G65/333 , A61K47/60 , C08G65/30
摘要： The instant disclosure provides (among other things) improved methods of preparing fluorenyl-based polymeric reagents, methods of recovering and purifying such polymeric reagents, methods of reducing unwanted impurities in a fluorenyl-based polymeric reagent, fluorenyl-based polymeric reagents prepared by the methods described herein, and conjugates prepared by reaction with fluorenyl-based polymeric reagents prepared by the methods described herein.
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公开(公告)号：US10808076B2
公开(公告)日：2020-10-20
申请号：US15919770
申请日：2018-03-13
申请人： Andrey Bagreev , George E. Hicks
发明人： Andrey Bagreev , George E. Hicks
摘要： A method of purifying a crude polyalkylene oxide polymer that contains a catalyst, such as potassium hydroxide. The method comprises contacting the crude polyalkylene oxide polymer with a composition comprising an acid functionalized silicate, such as an acid functionalized magnesium silicate adsorbent containing at least one acid in an amount effective to remove the catalyst from the polyalkylene oxide polymer. Such a method provides for an improved removal of the catalyst from the polyalkylene oxide polymer.
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公开(公告)号：US20200087452A1
公开(公告)日：2020-03-19
申请号：US16467353
申请日：2017-12-04
发明人： Chenxi ZHANG , Erika ZHU , Liang XUE
摘要： The present invention relates to a method for the preparation of a low odor polyether polyol, including: a) providing a basic polyether polyol which comprises one or more aldehyde compounds in an amount of lower than 2 wt. %, based on the amount of said basic polyether polyol as 100 wt. %; b) adding to said basic polyether polyol an aldehyde trapping agent and said aldehyde trapping agent is reacted with said one or more aldehyde compounds to remove said one or more aldehyde compounds, wherein said aldehyde trapping agent is in an amount of 0.1 to 5 wt. %, based on the weight of said basic polyether polyol as 100 wt. %; and c) removing the excess aldehyde trapping agent to obtain said low odor polyether polyol. The present invention also relates to the low odor polyether polyol prepared by said method.
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公开(公告)号：US20190309120A1
公开(公告)日：2019-10-10
申请号：US16470306
申请日：2017-12-28
发明人： Erika NOBUKUNI , Takashi YABUTA
摘要： The present invention aims to provide a method of producing a polyether polyol having a low aldehyde content, the method including simpler steps; and a method of producing polyurethane foam having a reduced amount of aldehyde volatilization. The present invention provides a method of producing a polyether polyol (F) including step (1) of obtaining a crude polyether polyol composition (D2) having a pH higher than 5.0 by contact of a crude polyether polyol composition (D1) containing a polyether polyol (A) with an acid catalyst (B) in the presence of water, the polyether polyol (A) being obtainable by ring-opening polymerization of an alkylene oxide with an active hydrogen compound; and step (2) of removing a volatile component containing an aldehyde (C) after step (1).
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公开(公告)号：US10301427B2
公开(公告)日：2019-05-28
申请号：US15863156
申请日：2018-01-05
申请人： Evonik Degussa GmbH
发明人： Matthias Lobert , Volker Zellmer , Anja Brösgen , Thomas Reibold
IPC分类号： C08G65/324 , C08G65/26 , C08G65/30 , C08G65/336 , C08G65/337 , C08L71/02
摘要： Described are a process for producing hydrosilylable polyoxyalkylene ethers, comprising the steps of (1) alkoxylation of at least one terminally unsaturated alcohol with alkylene oxides to afford a polyoxyalkylene ether, (2) etherification of the polyoxyalkylene ether from step (1) and (3) neutralization of the product from step (2) under buffered conditions, and hydrosilylable polyoxyalkylene ether mixtures.
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公开(公告)号：US20190077910A1
公开(公告)日：2019-03-14
申请号：US16185920
申请日：2018-11-09
申请人： Zeon Chemicals L.P.
发明人： Kentaro TSUBATA
摘要： A copolymer comprising about 50 to about 80 mol % alkylene oxide, about 5 to about 50 mol % halo epoxide, and 0 to about 15 mol % diene-epoxide. The copolymer has a water-soluble amount of less than 10 wt %. In some embodiments, the volume resistivity of a semi-conductive composition made from the copolymer is between about 1.0*105 about to 3.5*107 ohms*cm.
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