公开(公告)号：DE4434463A1

公开(公告)日：1996-03-28

申请号：DE4434463

申请日：1994-09-27

Applicant: BASF AG

Inventor： KRONER MATTHIAS DR ,  SCHORNICK GUNNAR DR

IPC: C07C231/02 ,  C07C237/22 ,  C08G69/48 ,  C08G73/10 ,  C11D3/37 ,  C08G69/36

Abstract: Described is a method for the preparation of modified polyaspartic acids by condensing aspartic acid with polybasic carboxylic acids or anhydrides of polybasic carboxylic acids and ammonia, essentially at temperatures of at least 140 DEG C in the absence of inorganic acids.

公开(公告)号：DE4434172A1

公开(公告)日：1996-03-28

申请号：DE4434172

申请日：1994-09-24

Applicant: BASF AG

Inventor： KRATZ DETLEF DR ,  WITZEL TOM DR ,  BAEZNER RUDOLF DR ,  KRONER MATTHIAS DR ,  PRESLER UWE DR

IPC: C07C227/06 ,  C07C229/24 ,  C07C227/04

Abstract: A process is disclosed for preparing D,L-aspartic acid by heating aqueous solutions of ammonium salts of the maleic acid. The molar ratio of maleic acid to ammonia ranges from 1:1 to 1:50. The process is carried out at temperatures from 60 to 250 DEG C and pressures of at least 1 bar. The pressure applied during the reaction is adjusted to ensure that the reaction mixture is almost completely present in liquid phase. Excess ammonia is removed and the reaction solution is acidified so as to release D,L-aspartic acid, which is then isolated.

公开(公告)号：DE4430520A1

公开(公告)日：1996-02-29

申请号：DE4430520

申请日：1994-08-27

Applicant: BASF AG

Inventor： KRONER MATTHIAS DR ,  SCHORNICK GUNNAR DR ,  STROTMANN UWE DR ,  SCHWENDEMANN VOLKER DR ,  LUDWIG ALFONS DR ,  MEYER THOMAS

IPC: C08G69/10 ,  C02F5/12 ,  C08G73/06 ,  C08G73/10 ,  C11D3/37 ,  C08G69/48

Abstract: A process is disclosed for preparing polyaspartic acid salts by treating polycondensates in an aqueous medium with bases. At least 0.7 equivalents of an alkaline metal and/or alkaline earth metal base per mole of the aspartic acid, aspartic acid imide and/or amide units contained in the polycondensates are used. The bases are added during 30 minutes to 20 hours to an aqueous suspension of the polycondensates of aspartic acid heated up to 40 to 140 DEG C, and the reaction mixture is optionally allowed to continue to react. These alkaline metal and/or alkaline earth metal salts of polyaspartic acids obtained by treating aspartic acid polycondensates in an aqueous medium with more than 1 equivalent of an alkaline metal and/or alkaline earth metal base for reducing the molar mass of polycondensates are used as additives for washing and cleaning agents.

公开(公告)号：DE4428639A1

公开(公告)日：1996-02-15

申请号：DE4428639

申请日：1994-08-12

Applicant: BASF AG

Inventor： KRONER MATTHIAS DR ,  SCHORNICK GUNNAR DR ,  FEINDT HANS-JACOB DR ,  MEYER THOMAS ,  LUDWIG ALFONS DR ,  METZMANN UDO

IPC: C02F5/12 ,  C08G69/10 ,  C08G73/06 ,  C08G73/10 ,  C11D3/37 ,  C08G73/14

Abstract: Disclosed is a method for producing polyaspartic acid by means of condensation polymerization of finely divided aspartic acid at temperatures above 150 DEG C in the presence of acid catalysts, the acid catalysts being first brought into contact with the finely divided aspartic acid in the reaction zone in which the condensation polymerization takes place.

公开(公告)号：DE4323191A1

公开(公告)日：1995-01-12

申请号：DE4323191

申请日：1993-07-10

Applicant: BASF AG

Inventor： KRONER MATTHIAS DR ,  MEYER THOMAS ,  SCHORNICK GUNNAR DR ,  HOFMANN JUERGEN

IPC: C08G69/00 ,  C08G73/10 ,  C08G69/10 ,  C08G69/44

公开(公告)号：DE4312753A1

公开(公告)日：1994-10-27

申请号：DE4312753

申请日：1993-04-20

Applicant: BASF AG

Inventor： KRONER MATTHIAS DR ,  SCHORNICK GUNNAR DR ,  SCHUMACHER KARL-HEINZ DR ,  WISTUBA ECKEHARDT DR

IPC: A61F13/15 ,  A01N25/26 ,  A61F13/49 ,  A61F13/551 ,  A61L15/26 ,  B32B27/00 ,  C05F9/00 ,  C08G65/34 ,  C08G65/40 ,  C09D171/00 ,  C09D171/10 ,  C09J171/00 ,  C09J171/10 ,  D21H19/24 ,  C08L59/00 ,  C09D159/00 ,  C09J159/00

公开(公告)号：DE4311237A1

公开(公告)日：1994-10-13

申请号：DE4311237

申请日：1993-04-06

Applicant: BASF AG

Inventor： POTTHOFF-KARL BIRGIT DR ,  KRONER MATTHIAS DR ,  SCHORNICK GUNNAR DR

IPC: C10M107/44 ,  C10M173/02 ,  B65G45/08 ,  C10M149/18

公开(公告)号：DE4305299A1

公开(公告)日：1994-08-25

申请号：DE4305299

申请日：1993-02-20

Applicant: BASF AG

Inventor： BOECKH DIETER DR ,  FUNHOFF ANGELIKA DR ,  KRONER MATTHIAS DR ,  SCHORNICK GUNNAR DR ,  BAUR RICHARD DR ,  KUD ALEXANDER DR ,  SCHWENDEMANN VOLKER DR

IPC: C08G12/00 ,  C11D3/37 ,  C08G12/10

公开(公告)号：DE4023820A1

公开(公告)日：1992-01-30

申请号：DE4023820

申请日：1990-07-27

Applicant: BASF AG

Inventor： KRONER MATTHIAS DR ,  KEMPTER FRITZ ERDMANN DR ,  BAUR RICHARD DR ,  DIESSEL PAUL ,  SCHWENDEMANN VOLKER DR ,  DENZINGER WALTER ,  HARTMANN HEINRICH DR ,  NIESSNER MANFRED DR

IPC: C11D3/37

Abstract: The invention concerns the use of polymerizates containing, as the major monomer component, at least 5 % by wt. of N-(alkoxy-polyalkoxymethyl)carboxylic acid amides of monoethylenically unsaturated C3-C8 carboxylic acids as additives to low-phosphate and phosphate-free washing and cleaning agents in amounts which increase the primary and secondary washing capability of the agent, plus agents containing these polymerizates.

公开(公告)号：ES2291389T3

公开(公告)日：2008-03-01

申请号：ES02009117

申请日：2002-04-24

Applicant: BASF AG

Inventor： KRONER MATTHIAS DR ,  BUCHNER KARL-HEINZ ,  BRODT GREGOR DR

IPC: C04B7/52 ,  C08G65/332 ,  C04B24/26 ,  C04B24/32 ,  C04B103/52 ,  C08F6/10 ,  C08F8/14 ,  C08F290/06 ,  C08F299/02 ,  C08L71/02

Abstract: Empleo de polímeros solubles en agua de ésteres del ácido acrílico, del ácido metacrílico y de alquilpolialquilenglicoles, que pueden ser obtenidos mediante esterificación azeotrópica de una mezcla de ácido acrílico (A), de ácido metacrílico (B) y de un alquilpolialquilenglicol (C) con un peso molecular M w comprendida entre 350 y 4.000, en el que la proporción molar entre (A) y (C) toma un valor de 0,1 hasta 4 : 1, la proporción molar entre (B) y (C) toma un valor desde 1 hasta 5 : 1 y la proporción molar de la suma formada por (A) y (B) sobre (C) toma un valor de 2 hasta 6 : 1, en presencia de un disolvente orgánico, que forme un azeótropo con agua, al menos en un 85% en peso, referido al alquilpolialquilenglicol (C), y a continuación polimerización, en medio acuoso, por medio de radicales de la mezcla formada durante la esterificación, eliminándose por destilación azeotrópica de la mezcla de la reacción el disolvente orgánico durante la polimerización y reciclándose hasta la mezcla el agua separada por destilación o substituyéndose mediante el aporte de agua fresca, como aditivos para sistemas cementosos.