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7544766 |
Method for the polymerization of cyclic ethers
The present invention relates to a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymer, diester or monoester by polymerizing tetrahydrofuran in the presence of at least one...
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7402711 |
Preparation of poly(tetramethylene) glycol
This invention relates to a process comprising using ionic liquids for preparing poly(tetramethylene)glycol from tetrahydrofuran.
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7342142 |
Hydrogenation of polytrimethylene ether glycol
A process comprising contacting PO3G having color with hydrogen in the presence of a hydrogenation catalyst, wherein the PO3G, after hydrogenation, has a APHA color of less than about 50.
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7276573 |
Method for producing monoesters and diesters of polytetrahydrofuran and of tetrahydrofuran copolymers
The present invention provides a process for preparing mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of at least one...
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7071364 |
Branched primary alcohol compositions and derivatives thereof
A detergent composition having cold water solubility and exhibiting high calcium tolerance can be produced from biodegradable branched ether derivative compositions derived from a branched ether...
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6989432 |
Copolymers of tetrahydrofuran, ethylene oxide and an additional cyclic ether
A copolymer with recurring constituent units derived by polymerizing tetrahydrofuran, ethylene oxide and at least one additional cyclic ether that can be substituted or unsubstituted that decreases...
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6987201 |
Acetic anhydride, method of purifying crude acetic anhydride, and method of producing polyoxytetramethylene glycol using acetic anhydride
The present invention provides acetic anhydride, a method of purifying crude acetic anhydride, and a method of producing polyoxytetramethylene glycol using acetic anhydride. A method of producing...
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6979752 |
Continuous process for converting polytetramethylene ether diester to polytetramethylene ether glycol
A continuous process for converting by transesterification the diester of polytetramethylene ether (PTMEA) to the corresponding polytetramethylene ether glycol (PTMEG). The process is characterized...
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6972317 |
Monohydric polyfluorooxetane polymer and radiation curable coatings containing a monofunctional polyfluorooxetane polymer
Monofunctional polyfluorooxetane oligomers and polymers are prepared by the cationic polymerization of fluorooxetane monomers with a monoalcohol. The fluorooxetane oligomers or polymers can be...
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6891013 |
Fluorinated polyurethane elastomers prepared from polyether prepolymers formed from mono-substituted fluorinated oxetane monomers and tetrahydrofuran
The present invention provides, inter alia, novel fluorinated polyurethane elastomers (e.g., fluorinated thermoset polyurethane elastomers and fluorinated thermoplastic elastomers) prepared from...
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6858757 |
Process for preparing perfluoropolyoxyalkylenes with -OCF2H, -OCF2CF2H and -OCF(CF3)H end groups
A process for preparing perfluoropolyoxyalkylenes having —OCF 2 H, —OCF 2 CF 2 H and —OCF(CF 3 )H end groups and a number average molecular weight from 120 to 3,000, by decarboxylation of the...
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6699961 |
DMC complex catalyst and process for its preparation
A process for the preparation of a DMC catalyst useful in the polymerization of alkylene oxides into polyether polyols, which process having the steps of (a combining an aqueous solution of a metal...
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6570041 |
Polyoxytetramethylene glycol and process for producing the same
Disclosed is a high heat resistance and low viscosity polyoxytetramethylene glycol (PTMG) having the following characteristics (1) to (4): (1) a number average molecular weight of from 500 to 3000;...
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6566563 |
Method for producing compounds with terminal OH groups
A process for making OH-terminated compounds involving: (a) combining at least one CH 2 OH-terminated diol and a titanium-containing catalyst to form a reaction mixture; (b) heating the reaction...
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6559278 |
Method for producing tetrahydrofuran polymers
The invention relates to a method for continuously or discontinuously producing tetrahydrofuran polymers by homopolymerization of tetrahydrofuran, alkyl-substituted tetrahydrofurans and/or alkylene...
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6414109 |
Process for producing tetrahydrofuran polymer
Provided is a process for producing a tetrahydrofuran polymer using a heteropoly-acid catalyst wherein the content of Al in the heteropoly-acid is 4 ppm or less.
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6403842 |
Processes for producing poly(alkylene ether) glycol
Disclosed are a process for producing a poly(alkylene ether) glycol which comprises polymerizing a cyclic ether in the presence of at least a catalyst and a carboxylic acid anhydride, wherein the...
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6395938 |
Method of regulating molecular weight distribution of polyether glycol
A method for controlling the molecular weight distribution of polyether glycol in producing polyether glycol having a specified number average molecular weight by polymerizing tetrahydrofuran as a...
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6380351 |
Copolymers and coprepolymers formed from mono-substituted fluorinated oxetane monomers and tetrahydrofuran
The present invention provides, inter alia, novel fluorinated copolymers and coprepolymers derived from mono-substituted oxetane monomers having fluorinated alkoxymethylene side-chains (FOX...
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6362312 |
Catalyst and method for the production of polytetrahydrofuran
In a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters thereof comprises polymerizing tetrahydrofuran in the presence of at least one telogen...
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6359108 |
Method for polymerizing cyclic ether
A process for polymerizing cyclic ethers over a heterogeneous catalyst comprises using a heterogeneous catalyst comprising one or more pillared interlayered clays (PILCs).
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6355846 |
Narrowing of poly (tetramethylene ether) glycol
A process for producing a poly(tetramethylene ether) glycol (PTMEG) or copolymer having a narrowed molecular weight ratio of 1.9 to 2.07 and a dispersity of 1.2 to 1.65 from a starting PTMEG or...
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6313060 |
Catalyst for ring-opening polymerization of alkylene oxide, method for preparation thereof and use thereof
A resilient polyurethane foam produced by using a polyether polyol produced by reacting alkylene oxides with a polyhydroxy compound having at least 2 hydroxyl groups as an initiator in the presence...
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6291714 |
Continuous process for effecting gas liquid reactions
A continuous process for the production of polyadducts of alkylene oxide on a chain initiator with at least one active hydrogen comprises the step of: (a) providing n reaction units constituted by...
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6211401 |
Process for preparing polytetrahydrofuran
Polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer on a...
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6111147 |
Process for preparing polytetrahydrofuran and derivatives thereof
Polytetrahydrofuran, copolymers of tetrahydrofuran and 2-butyne-1,4-diol, diesters of these polymers with C 2 -C 20 -monocarboxylic acids or monoesters of these polymers with C 1 -C 10 ...
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6069226 |
Process for the preparation of polytetramethylene ether glycol diester using an aluminosilicate type catalyst
Polytetramethylene ether glycol diester of the formula ##STR1## wherein R and R 1 are identical or different and are alkyl radicals having 1-4 carbon atoms, and n is an integer from 2 to 200, are...
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6040413 |
Composition of polytetramethylene ether glycols and polyoxy alkylene polyether polyols having a low degree of unsaturation
Thus, there is provided according to the present invention polyol compositions comprising (A) a polytetramethylene ether glycol, and (B) a trifunctional active hydrogen compound-initiated...
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6028229 |
Process for producing end-group-locked non-ionic tensides
A process for the production of end-capped nonionic surfactants corresponding to formula (I): ##STR1## in which R 1 is an alkyl or alkenyl group containing 6 to 22 carbon atoms, n1 and n2...
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5962727 |
Method for manufacturing diacetate esters of polytetramethylene ethers
An improved method for manufacturing diesters of polytetramethylene ethers involving the polymerization of tetrahydrofuran (THF) optionally with one or more comonomers (e.g., 3-methyl THF, ethylene...
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5951829 |
Separation of heteropoly compounds from polyethers, polyesters and polyether esters
A method of separating heteropoly compounds from mixtures of polyethers, polyesters and/or polyether esters, a protic component and heteropoly compounds, wherein the protic component is removed...
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5939590 |
Tetrahydrofuran/but-2-yne-1, 4-diol copolymers containing C-C triple bonds
Tetrahydrofuran/but-2-yne-1,4-diol copolymers containing C--C triple bonds and having an average molecular weight M n of from 500 to 3500 Dalton and a content of from 0.5 to 3 mol of triple...
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5907054 |
Process for the polymerization of cyclic ether
The present invention provides a process for the production of an ester of polyoxyalkylene glycol on an industrially favorable basis which comprises the ring opening polymerization of a cyclic...
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5892130 |
Oxyalkylene-modified polyoxybutylene alcohols
Disclosed is an oxyalkylene-modified polyoxybutylene alcohol having an improved viscosity index. Notably enhancement of the viscosity index is obtained when the polyoxybutylene alcohol contains an...
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5886138 |
Process for the preparation of tetrahydrofuran polymers
A process for the continuous and discontinuous production of tetrahydrofuran polymers by homopolymerizing tetrahydrofuran or copolymerizing tetrahydrofuran with 1,2-alkylene oxides in the presence...
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5852218 |
Alkanolysis of polyether polyol esters by reactive distillation
A method for converting the diester of a polyether polyol (e.g., the diacetate ester of polytetramethylene ether, PTMEA) to a corresponding dihydroxy polyether polyol (e.g., polytetramethylene...
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5773648 |
Preparation of polytetrahydrofuran
A process for the preparation of polytetrahydrofuran or polytetrahydrofuran monoesters of C 1 -C 10 monocarboxylic acids by the polymerization of tetrahydrofuran over a heterogeneous catalyst in...
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5741946 |
Polyether lubricants and method for their production
Cyclic ethers are polymerized or copolymerized in homogeneous liquid phase using very low concentrations of heteropolyacid catalyst to produce essentially linear polyoxyalkylene polymers. The...
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5731476 |
Poly ether preparation
Polyethers of polyhydric compounds are prepared by the liquid phase reaction of polyhydric compound and the reaction being carried out with separate liquid phases comprised of a polar polyhydric...
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5714638 |
Preparation of polyoxyalkylene glycol monoether of tert-butyl alcohol and product
Polyoxyalkylene glycol monoethers of monohydric alcohols are prepared by a process in which tetrahydrofuran or a mixture of tetrahydrofuran with a total of not more than 95 mol %, based on the...
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5686379 |
Alkoxylation catalyst, process for the preparation of the catalyst and process for preparing alkoxylate with the use of the catalyst
An alkoxylation catalyst comprising metal oxides, having a basicity point expressed in pKa value from 9 to 25 and an acidity point expressed in the amount of ammonia gas adsorbed from 50 to 500...
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5684096 |
Adducts of polyalkylene glycol and diglycidyl ether
Water-in-oil emulsions are broken by the use of adducts prepared by reacting high molecular weight polyalkylene glycol with ethylene oxide, or diglycidyl ether, or both ethylene oxide and...
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5668251 |
Preparation of co-prepolymers from mono-substituted fluorinated monomers and tetrahydrofuran
This application is directed to novel fluorinated polymers and prepolymers derived from mono-substituted oxetane monomers having fluorinated alkoxymethylene side-chains and the method of making...
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5668250 |
Polyether coprepolymers formed from mono-substituted fluorinated oxetane monomers and tetrahydrofuran
This application is directed to novel fluorinated polymers and prepolymers derived from mono-substituted oxetane monomers having fluorinated alkoxymethylene side-chains and the method of making...
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5659068 |
Preparation of polyoxyalkylene glycol monoesters of monocarboxylic acids
Polyoxyalkylene glycol monoesters of carboxylic acids are prepared by a process in which tetrahydrofuran or a mixture of tetrahydrofuran with a total of not more than 95 mol %, based on the amount...
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5641857 |
Preparation of polytetrahydrofuran
Polytetrahydrofuran or polytetrahydrofuran monoesters of C 1 -C 20 -monocarboxylic acids or polytetrahydrofuran monoethers of monohydric C 1 -C 20 -alcohols, having an average molecular weight...
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5641853 |
Polymerization of cyclic ethers using selected metal compound catalysts
A process for polymerizing oxepanes, dioxolanes, trioxanes, and tetrahydrofurans to their respective polymers by contacting them with a selected metal compound and an accelerator which is a...
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5637673 |
Polyether-containing double metal cyanide catalysts
Improved double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and from about 5 to about 80 wt. % of a polyether polyol that has...
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5608117 |
Process for producing saturated polyether glycols and alcohols derived from 3, 4-epoxy-1-butene
Disclosed are novel saturated polyether compounds comprised of n units of residue (1) and m units of residue (2), wherein (i) residues (1) and (2) have the structures: ##STR1## (ii) the total value...
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5585458 |
Method for preparing hydroxy group end-capped polyether glycols
A method for preparing polyether glycol is disclosed. An ester end-capped polyalkylene ether and an alcohol are subjected to alcoholysis at a temperature of 35°-150° C. and a pressure of 1-10 atm...
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