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Class Information
Number: 568/617
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Ethers > Plural oxyalkylene groups bonded directly to each other > Acyclic > Polytetramethylene glycols
Description: Compounds which contain two or more oxytetramethylene moieties terminated by hydroxy groups.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8481788 Process for producing polyalkylene oxide Jul. 9, 2013
8053607 Method for producing polyether-polyol having narrow molecular weight distribution Nov. 8, 2011
7795476 Compositions for sustained release of volatile materials Sep. 14, 2010
7544766 Method for the polymerization of cyclic ethers Jun. 9, 2009
7528287 Preparation of poly(tetramethylene) glycol May. 5, 2009
7402711 Preparation of poly(tetramethylene) glycol Jul. 22, 2008
7342142 Hydrogenation of polytrimethylene ether glycol Mar. 11, 2008
7276573 Method for producing monoesters and diesters of polytetrahydrofuran and of tetrahydrofuran copolymers Oct. 2, 2007
7071364 Branched primary alcohol compositions and derivatives thereof Jul. 4, 2006
6989432 Copolymers of tetrahydrofuran, ethylene oxide and an additional cyclic ether Jan. 24, 2006
6987201 Acetic anhydride, method of purifying crude acetic anhydride, and method of producing polyoxytetramethylene glycol using acetic anhydride Jan. 17, 2006
6979752 Continuous process for converting polytetramethylene ether diester to polytetramethylene ether glycol Dec. 27, 2005
6972317 Monohydric polyfluorooxetane polymer and radiation curable coatings containing a monofunctional polyfluorooxetane polymer Dec. 6, 2005
6891013 Fluorinated polyurethane elastomers prepared from polyether prepolymers formed from mono-substituted fluorinated oxetane monomers and tetrahydrofuran May. 10, 2005
6858757 Process for preparing perfluoropolyoxyalkylenes with -OCF2H, -OCF2CF2H and -OCF(CF3)H end groups Feb. 22, 2005
6780928 Polyoxyalkylene monoalkyl ether, process for producing the same, polymerizable polyoxyalkylene monoalkyl ether derivative, polymer of said derivative and dispersant comprising said polymer Aug. 24, 2004
6699961 DMC complex catalyst and process for its preparation Mar. 2, 2004
6680406 Sol-gel derived porous microcomposite of perfluorinated ion-exchange polymer and metal oxide Jan. 20, 2004
6586564 Double-metal cyanide catalysts for preparing polyether polyols Jul. 1, 2003
6570041 Polyoxytetramethylene glycol and process for producing the same May. 27, 2003
6566563 Method for producing compounds with terminal OH groups May. 20, 2003
6559278 Method for producing tetrahydrofuran polymers May. 6, 2003
6414109 Process for producing tetrahydrofuran polymer Jul. 2, 2002
6403842 Processes for producing poly(alkylene ether) glycol Jun. 11, 2002
6395938 Method of regulating molecular weight distribution of polyether glycol May. 28, 2002
6380351 Copolymers and coprepolymers formed from mono-substituted fluorinated oxetane monomers and tetrahydrofuran Apr. 30, 2002
6362312 Catalyst and method for the production of polytetrahydrofuran Mar. 26, 2002
6359108 Method for polymerizing cyclic ether Mar. 19, 2002
6355846 Narrowing of poly (tetramethylene ether) glycol Mar. 12, 2002
6313060 Catalyst for ring-opening polymerization of alkylene oxide, method for preparation thereof and use thereof Nov. 6, 2001
6291714 Continuous process for effecting gas liquid reactions Sep. 18, 2001
6211401 Process for preparing polytetrahydrofuran Apr. 3, 2001
6204357 Double metal cyanide catalysts for preparing poly-etherpolyols Mar. 20, 2001
6111147 Process for preparing polytetrahydrofuran and derivatives thereof Aug. 29, 2000
6087460 Organo-Lewis acid as cocatalyst for cationic homogenous metallocene Ziegler-Natta olefin polymerizations Jul. 11, 2000
6069226 Process for the preparation of polytetramethylene ether glycol diester using an aluminosilicate type catalyst May. 30, 2000
6040413 Composition of polytetramethylene ether glycols and polyoxy alkylene polyether polyols having a low degree of unsaturation Mar. 21, 2000
6028229 Process for producing end-group-locked non-ionic tensides Feb. 22, 2000
5962727 Method for manufacturing diacetate esters of polytetramethylene ethers Oct. 5, 1999
5951829 Separation of heteropoly compounds from polyethers, polyesters and polyether esters Sep. 14, 1999
5939590 Tetrahydrofuran/but-2-yne-1, 4-diol copolymers containing C-C triple bonds Aug. 17, 1999
5907054 Process for the polymerization of cyclic ether May. 25, 1999
5892130 Oxyalkylene-modified polyoxybutylene alcohols Apr. 6, 1999
5886138 Process for the preparation of tetrahydrofuran polymers Mar. 23, 1999
5852218 Alkanolysis of polyether polyol esters by reactive distillation Dec. 22, 1998
5773648 Preparation of polytetrahydrofuran Jun. 30, 1998
5741946 Polyether lubricants and method for their production Apr. 21, 1998
5731476 Poly ether preparation Mar. 24, 1998
5714638 Preparation of polyoxyalkylene glycol monoether of tert-butyl alcohol and product Feb. 3, 1998
5703194 Fluorinated thermoset polyurethane elastomers prepared from polyether coprepolymers formed from mono-substituted fluorinated oxetane monomers and tetrahydrofuran Dec. 30, 1997

1 2 3 4

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