Patent application number | Description | Published |
20080214778 | Method For Producing Polyether Alcohols - The invention provides a process for continuously preparing polyether alcohols using DMC catalysts, which comprises, in a first step, in a continuous reactor, adding alkylene oxides onto H-functional starter substances and transferring the output of this reactor to a second step in a reactor which is divided by closed trays into mutually separate sections, known as compartments, which are connected to one another by external pipelines, in which the output of the reactor from the first step of the reaction passes through the compartments in succession. | 09-04-2008 |
20090203874 | METHOD FOR PRODUCING POLYETHER POLYOLS - A process for preparing polyether polyols by reaction of the following starting materials:
| 08-13-2009 |
20090292147 | PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYETHER ALCOHOLS - The invention relates to a process for the continuous preparation of polyether alcohols by reacting H-functional initiators with alkylene oxides using basic catalysts, wherein at least one initiator is metered with at least one alkylene oxide continuously into a back-mixing reactor and the reaction product is removed continuously from the back-mixing reactor. | 11-26-2009 |
20100029961 | DMC CATALYSTS, METHOD FOR THE PRODUCTION THEREOF AND USE THEREOF - The invention relates to a process for preparing DMC catalysts by reaction of cyanometalate compounds with metal salts, wherein the reaction is carried out in ionic liquids as solvents or suspension media. | 02-04-2010 |
20100216968 | PROCESS FOR THE PREPARATION OF POLYETHER ALCOHOLS FROM UNSATURATED STARTERS HAVING ACTIVE HYDROGEN ATOMS - A process for the preparation of polyether alcohols by reacting at least one alkylene oxide with at least one unsaturated starter having at least one active hydrogen atom per molecule under basic catalysis,
| 08-26-2010 |
20100331510 | HYDROPHOBICALLY ASSOCIATING COPOLYMERS - Water-soluble, hydrophobically associating copolymers which comprise new types of hydrophobically associating monomers. The monomers comprise an ethylenically unsaturated group and a polyether group with block structure comprising a hydrophilic polyalkylene oxide block which consists essentially of ethylene oxide groups, and a terminal, hydrophobic polyalkylene oxide block which consists of alkylene oxides with at least 4, preferably at least 5 carbon atoms. | 12-30-2010 |
20110224397 | PROCESS FOR PREPARING POLYOLS USING BASE CATALYSIS - The present invention relates to a process for preparing polyetherols in the presence of basic catalysts, wherein propylene oxide (PO) and/or ethylene oxide (EO) whose summated contents
| 09-15-2011 |
20120035381 | PROCESS FOR PREPARING ALLYL ALCOHOL ALKOXYLATES - A process for preparing polyether alcohols by reacting one or more unsaturated starters having at least one active hydrogen atom per molecule with one or more alkylene oxides in the liquid phase in the presence of a basic catalyst in a reactor, wherein the one or more alkylene oxides are introduced into the reactor in such a way that the concentration of unreacted alkylene oxide in the liquid reaction mixture in the reactor is increased as far as possible with increasing degree of addition of the alkylene oxide onto the starter, with the proviso that the temperature at the end of a runaway reaction is at any point in time at least 100 K below the onset temperature of the decomposition reaction of the liquid reaction mixture, is proposed. | 02-09-2012 |
20120130134 | PROCESS FOR THE PREPARATION OF POLYETHEROLS FROM ALKYLENE OXIDES - A process for the preparation of polyetherols, comprising the following steps:
| 05-24-2012 |
20130023700 | PROCESS FOR A CONTINUOUS PRODUCTION OF POLYETHEROLS - A process for a continuous production of a polyetherol first involves reacting an alcohol with a starter or an alkoxylated precursor, to give a mixture comprising an alcoholate and water. Water is then removed from the mixture. The process further involves feeding the alcoholate into a bubble column and feeding an alkylene oxide into the bottom of a compartment of the bubble column, such that the alkylene oxide rises in the alcoholate. The alkylene oxide then reacts with the alcoholate or a secondary product from the reaction between the alcoholate and alkylene oxide, to give the polyetherol. | 01-24-2013 |
20130105165 | HYDROPHOBICALLY ASSOCIATING COPOLYMERS | 05-02-2013 |
20140316035 | HYDROPHOBICALLY ASSOCIATING COPOLYMERS - Water-soluble, hydrophobically associating copolymers which comprise new types of hydrophobically associating monomers. The monomers comprise an ethylenically unsaturated group and a polyether group with block structure comprising a hydrophilic polyalkylene oxide block which consists essentially of ethylene oxide groups, and a terminal, hydrophobic polyalkylene oxide block which consists of alkylene oxides with at least 4, preferably at least 5 carbon atoms. | 10-23-2014 |