-
公开(公告)号：HU0203763A2
公开(公告)日：2003-04-28
申请号：HU0203763
申请日：2000-12-06
Applicant: BASF AG
Inventor： BAUER STEPHAN , GROSCH GEORG HEINRICH , HARRE KATHRIN , HOEPPNER GERD , LORENZ REINHARD , PAREDIS ELS , ROTERMUND INGE , WINKLER JUERGEN
Abstract: In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.
-
公开(公告)号：NO20016181L
公开(公告)日：2002-06-24
申请号：NO20016181
申请日：2001-12-18
Applicant: BASF AG
Inventor： MURRAR IMBRIDT , PLAUMANN HEINZ , WINKLER JUERGEN , SCHUSTER MARITA
IPC: C07C273/18 , C08G18/16 , C08G18/40 , C08G18/78 , C08G18/00
Abstract: Highly functional aromatic polyisocyanates are prepared by reacting aromatic polyisocyanates, if required as a mixture with further mono- and/or polyisocyanates, with addition of catalytic acidic substances and water, by a process wherein the aromatic polyisocyanates used comprise at least one tolylene diisocyanate and the catalytic acidic substance used is at least one alkyl and/or aralkyl phosphate, and the process is carried out in such a way that the water is added with a temperature/time gradient increase from 5 to 60°/hour and until an isocyanate modification of the starting NCO terminal groups from 1 to 80% is established. The highly functional aromatic polyisocyanates prepared by this process are used for the preparation of polyurethane foams, in particular flexible polyurethane foams.
-
公开(公告)号：DE19947192A1
公开(公告)日：2001-04-05
申请号：DE19947192
申请日：1999-10-01
Applicant: BASF AG
Inventor： HORN PETER , SCUPIN HANSJOACHIM , BARTZ THOMAS , WINKLER JUERGEN
-
公开(公告)号：MX9602244A
公开(公告)日：1997-08-30
申请号：MX9602244
申请日：1996-06-07
Applicant: BASF AG
Inventor： DINSCH STEFAN , PRETZSCH REGINA , WINKLER JUERGEN , GUETTES BERND , STEINCHEN KARL-HEINZ
IPC: C08G18/48 , C08G18/50 , C08G65/26 , C08F120/20
Abstract: En un proceso para preparar polioles de poliéter que contienen compuestos aromáticos mediante adicion molecular de oxido de alquileno a iniciadores H-funcionales a temperatura de 70 degree C a 135 degree C y presiones de 0.1 MPa a 1.0 MPa, la alcoxilacion se lleva a cabo usando por lo menos un iniciador que comprende por lo menos 95 por ciento en peso de 2,3- y 3,4-isomeros de tolilendiamina, de 0.5 por ciento a 4 por ciento en peso de 2,4 y 2,6-isomeros de tolilendiamina y de 0.1 por ciento a 1.5 por ciento en peso de fracciones más volátiles de la produccion de tolilendiamina. Los polioles de poliéter preparados mediante este proceso para producir espumas de poliuretano rígidas.
-
公开(公告)号：DE102007020976A1
公开(公告)日：2007-11-22
申请号：DE102007020976
申请日：2007-05-04
Applicant: BASF AG
Inventor： DINSCH STEFAN , FALKE PETER , WINKLER JUERGEN , ZIELER RALF
Abstract: Method for processing polyetheralcohol obtained by the catalytic addition of alkylene oxide to active hydrogen containing starting material in the presence of a basic catalyst, comprises: (a) providing a basic catalyst under stoichiometric quantity of an acid to alkaline polyetheralcohol; (b) adding urea to the mixture (at least a quantity sufficient for neutralizing the basic catalyst); (c) removing the salts obtained in (a) and (b), and the excess urea; and (d) separating water and other easily volatile materials. Independent claims are included for: (1) polyetheralcohol obtained by the process; and (2) a process for the preparation of polyurethane comprising reacting a polyisocyanate with a compound containing at least two isocyanate reactive hydrogen atoms, preferably the polyether alcohol.
-
Patent Agency Ranking
公开(公告)号：DE50308189D1
公开(公告)日：2007-10-25
申请号：DE50308189
申请日：2003-07-24
Applicant: BASF AG
Inventor： BAUER STEPHAN , RUPPEL RAIMUND , BAUM EVA , WINKLER JUERGEN , BOHRES EDWARD
Abstract: The present invention provides a process for producing low-emission flexible polyurethane foams having a reduced odor and reduced fogging by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, c) blowing agents wherein polyether alcohols which have been prepared by addition of alkylene oxides onto compounds derived from renewable raw materials using DMC catalysts are used as compounds b) having at least two hydrogen atoms which are reactive toward isocyanate groups.
-
公开(公告)号：AT373031T
公开(公告)日：2007-09-15
申请号：AT03790810
申请日：2003-07-24
Applicant: BASF AG
Inventor： BAUER STEPHAN , RUPPEL RAIMUND , BAUM EVA , WINKLER JUERGEN , BOHRES EDWARD
Abstract: The present invention provides a process for producing low-emission flexible polyurethane foams having a reduced odor and reduced fogging by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, c) blowing agents wherein polyether alcohols which have been prepared by addition of alkylene oxides onto compounds derived from renewable raw materials using DMC catalysts are used as compounds b) having at least two hydrogen atoms which are reactive toward isocyanate groups.
-
公开(公告)号：DE50301697D1
公开(公告)日：2005-12-22
申请号：DE50301697
申请日：2003-06-06
Applicant: BASF AG
Inventor： RUPPEL RAIMUND , BAUM EVA , WINKLER JUERGEN , BOHRES EDWARD
IPC: C08G65/26
Abstract: The invention relates to a method for producing polyether alcohols, comprising the following steps: a) reacting a low-molecular alcohol with alkylene oxide in the presence of a basic catalyst in order to form an alkylene oxide addition product having a molecular weight ranging from 200 to 900 g/mol; b) separating the basic catalyst from the product obtained in step a), and; c) reacting the product obtained in step b) with another alkylene oxide in order to produce the desired final product while using at least one DMC catalyst. The inventive method is characterized in that sodium hydroxide is used as the basic catalyst in step a).
-
-
-
-
-
-
-
-
Search Results
68
records
(took 0.021 seconds)
