公开(公告)号：AU7564996A

公开(公告)日：1997-06-11

申请号：AU7564996

申请日：1996-11-05

Applicant: BASF AG

Inventor： POTTHOFF-KARL BIRGIT ,  EHLE BEATE ,  FUNHOFF ANGELIKA ,  KIESSLING DIETER ,  BAUR RICHARD ,  GREINDL THOMAS

IPC: C11D1/10 ,  C11D1/14 ,  C11D1/22 ,  C11D1/29 ,  C11D1/72 ,  C11D1/88 ,  C11D1/94 ,  C11D3/06 ,  C11D3/08 ,  C11D3/10 ,  C11D3/12 ,  C11D3/33 ,  C11D17/06

公开(公告)号：DE59305818D1

公开(公告)日：1997-04-17

申请号：DE59305818

申请日：1993-12-21

Applicant: BASF AG

Inventor： KRONER MATTHIAS ,  HARTMANN HEINRICH ,  SCHORNICK GUNNAR ,  BAUR RICHARD ,  POTTHOFF-KARL BIRGIT ,  SCHWENDEMANN VOLKER ,  KUD ALEXANDER

IPC: C08G69/08 ,  C08G69/10 ,  C08G73/00 ,  C08G73/06 ,  C08G73/10 ,  C09B67/46 ,  C09D17/00 ,  C09K23/00 ,  C09K23/52 ,  C11D3/37

Abstract: PCT No. PCT/EP93/03641 Sec. 371 Date Jun. 26, 1995 Sec. 102(e) Date Jun. 26, 1995 PCT Filed Dec. 21, 1993 PCT Pub. No. WO94/15993 PCT Pub. Date Jul. 21, 1994Process for the preparation of polymers of aspartic acid by reacting (a) maleic anhydride and (b) ammonia and/or primary or secondary amines without diluent in the (a):(b) molar ratio of 1:0.1 to 1:3 to give monoamides of maleic acid, fumaric acid or their ammonium salts at up to 100 DEG C. and subsequent condensation of the reaction products, with or without compounds capable of cocondensation, at above 100 DEG C. and, where appropriate, hydrolysis of the condensates and use of the polymers as scale inhibitor, as dispersants for pigments and as additive to detergents and cleaners.

公开(公告)号：DE59401479D1

公开(公告)日：1997-02-13

申请号：DE59401479

申请日：1994-03-22

Applicant: BASF AG

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

IPC: A23C7/02 ,  C11D3/02 ,  C11D3/04 ,  C11D3/08 ,  C11D3/10 ,  C11D3/37 ,  C11D7/06

公开(公告)号：DK0692015T3

公开(公告)日：1997-01-20

申请号：DK94911940

申请日：1994-03-22

Applicant: BASF AG

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

IPC: A23C7/02 ,  C11D3/02 ,  C11D3/04 ,  C11D3/08 ,  C11D3/10 ,  C11D3/37 ,  C11D7/06

公开(公告)号：FI960841A0

公开(公告)日：1996-02-23

申请号：FI960841

申请日：1996-02-23

Applicant: BASF AG

Inventor： SCHNEIDER JUERGEN ,  OFTRING ALFRED ,  FREYBERG PETER ,  SCHUHMACHER RUDOLF ,  BAUR RICHARD ,  POTTHOFF-KARL BIRGIT ,  KUD ALEXANDER

IPC: C11D3/12 ,  C05D9/02 ,  C05F11/00 ,  C09K3/00 ,  C11D1/10 ,  C11D3/33 ,  C11D3/34 ,  C11D7/32 ,  C11D7/34 ,  D21C9/10 ,  G03C5/305 ,  G03C7/42 ,  C11D

公开(公告)号：CA2196336A1

公开(公告)日：1996-02-15

申请号：CA2196336

申请日：1995-07-21

Applicant: BASF AG

Inventor： KRONER MATTHIAS ,  SCHORNICK GUNNAR ,  BAUR RICHARD ,  POTTHOFF-KARL BIRGIT

IPC: C02F5/00 ,  C02F5/12 ,  C08G69/10 ,  C08G73/10 ,  C11D3/37

Abstract: A process is disclosed for preparing aspartic acid polycondensates with improved biological degradability by thermal polycondensation of finely powdered aspartic acid in solid phase, at temperatures from 180 to 250 ~C, until maximum 70 % by weight of the theoretically possible amount of water produced during polycondensation are removed from the reaction mixture. Also disclosed is the use of the thus produced polycondensates as additives for washing and cleaning agents and as scale inhibitors.