http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0491232-A1

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classificationIPCInventive http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-48
filingDate 1991-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a3bc863e28be36469226b0ad4b7de029
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4790eb5a1ff0fc200dc830a21beaf8ad
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_085ada0dcfc9fafb2efba61e1ec312c1
publicationDate 1992-06-24-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-0491232-A1
titleOfInvention High molecular weight polyetherpolyols
abstract a) r = n bis 50n mol eines Epoxides oder mehrerer Epoxide der allgemeinen Formel IIn in der R¹ Wasserstoff oder eine C₁-C₄-Alkylgruppe und R² einen der Reste R¹ oder die Phenylgruppe, die noch ein oder zwei Halogenatome und/oder C₁-C₄-Alkylgruppen tragen kann, bedeutet, oder in der R¹ und R² gemeinsam eine Tetramethylengruppierung bedeuten, in Gegenwart einer Base, b) Überführung von s = 2 bis n mol der im Umsetzungsprodukt vorliegenden Hydroxylgruppen in Alkalimetallalkoholatgruppen und c) weitere Umsetzung des nach Stufe (b) erhaltenen Produktes oder eines Gemisches mehrerer dieser Produkte mit p mol einer q-wertigen Verbindung III, wobei p mindestens 1/3 mol ist und die Beziehung p*q = s gilt und wobei die Wertigkeit durch reaktionsfähige Chloratome, Bromatome und/oder Epoxygruppen bestimmt ist, d) Neutralisation des Reaktionsgemisches und Reinigung der Produkte in an sich bekannter Verfahrensweise, mit der Maßgabe, daß n einen Wert von 3 bis 6 bedeutet, wenn die Verbindungen III mindestens eine Epoxygruppe und mindestens ein Chlor- oder Bromatom tragen.High molecular weight polyetherols obtainable by reacting 1 mol of a starting compound I which contains n = 2 to 8 mol of active hydrogen in the form of hydroxyl groups, thiol groups, primary amino groups and / or secondary amino groups and whose molecular weight is up to 400 a) r = n to 50n mol of an epoxide or more epoxides of the general formula II in which R¹ is hydrogen or a C₁-C₄-alkyl group and R² is one of the radicals R¹ or the phenyl group, which can also carry one or two halogen atoms and / or C₁-C₄-alkyl groups, or in which R¹ and R² together represent a tetramethylene group , in the presence of a base, b) conversion of s = 2 to n mol of the hydroxyl groups present in the reaction product into alkali metal alcoholate groups and c) further reaction of the product obtained according to stage (b) or a mixture of several of these products with p mol of a q-valent compound III, where p is at least 1/3 mol and the relationship p * q = s applies and the valence is determined by reactive chlorine atoms, bromine atoms and / or epoxy groups is determined, d) neutralization of the reaction mixture and purification of the products in a manner known per se, with the proviso that n is a value from 3 to 6 if the compounds III carry at least one epoxy group and at least one chlorine or bromine atom.n n n The high molecular weight polyetherols are suitable as reaction components for the production of polyurethanes.
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priorityDate 1990-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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