公开(公告)号：DE19752181A1

公开(公告)日：1999-05-27

申请号：DE19752181

申请日：1997-11-25

Applicant: BASF AG

Inventor： HUENGER HANS-HARALD ,  LUDWIG ALFONS DR ,  NEUBERG RAINER DR ,  PIPPER GUNTER ,  SAUER THOMAS DR ,  WILMS AXEL DR

IPC: C08G69/14 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46 ,  C08L77/02

Abstract: Preparation of polyamides from a lactam(s) and optionally other monomers and additives and fillers comprises: (a) concentrating the extraction water from the extraction of polyamide to at most 85%; (b) adjusting the water content to 0.5-13 wt.% by adding fresh lactam; (c) exposing to polyamide forming conditions; and (d) adiabatically expanding during polymerization to reduce the water content.

公开(公告)号：DE3908458A1

公开(公告)日：1990-09-20

申请号：DE3908458

申请日：1989-03-16

Applicant: BASF AG

Inventor： WEGNER GERHARD PROF DR ,  CASERI WALTER DR ,  SAUER THOMAS DR

IPC: G02B5/30 ,  C08G77/48 ,  C08G77/50 ,  C08G77/58 ,  C08J5/18 ,  C09B69/10 ,  G02B1/04 ,  G02B1/10 ,  H01J61/35

Abstract: Novel polymers contain phthalocyanine ring systems bonded via axial bonds to a central metal atom in the polymer chain and consist of repeating units of the general formula (I) (I) In the general formula (I), Pcs is a phthalocyanine ring system having peripheral substituents, Me is the central atom of the phthalocyanine ring system, which atom is bonded in the polymer main chain, suitable central metal atoms Me being silicon and germanium, R is alkylene, R' and R'' are each alkyl, cycloalkyl, aryl or alkoxy and Z is a silicon-carbon bond or further Si-containing groups. The novel polymers can be particularly advantageously used for the production of ultrathin layers by the LB technique, optically transparent films having high optical anisotropy and a high volume concentration of phthalocyanine radicals being formed.

公开(公告)号：ES2154871T3

公开(公告)日：2001-04-16

申请号：ES97120566

申请日：1997-11-24

Applicant: BASF AG

Inventor： EGLY HORST ,  HUNGER HANS-HARALD ,  SAUER THOMAS DR

IPC: C07D201/16

Abstract: A process for recovering caprolactam and its oligomers by removing inorganic impurities from aqueous polycaprolactam extracts, in which the aqueous extract is continuously passed through an evaporator in such a way that the impurities are deposited on the heat exchange surfaces of the evaporator.

公开(公告)号：AT199145T

公开(公告)日：2001-02-15

申请号：AT97120566

申请日：1997-11-24

Applicant: BASF AG

Inventor： EGLY HORST ,  HUENGER HANS-HARALD ,  SAUER THOMAS DR

IPC: C07D201/16

Abstract: A process for recovering caprolactam and its oligomers by removing inorganic impurities from aqueous polycaprolactam extracts, in which the aqueous extract is continuously passed through an evaporator in such a way that the impurities are deposited on the heat exchange surfaces of the evaporator.

公开(公告)号：DE19638410A1

公开(公告)日：1998-03-26

申请号：DE19638410

申请日：1996-09-19

Applicant: BASF AG

Inventor： EGLY HORST ,  SAUER THOMAS DR

IPC: C08K3/22 ,  C09C1/36 ,  C08J3/22 ,  C08K3/20 ,  C08L77/02

Abstract: The invention concerns a method for preparing an aqueous fine-particle titanium oxide suspension, said suspension being led through a colloid mill. Said suspension can be used directly for dulling polycaprolactam meltings.

公开(公告)号：DE19648747A1

公开(公告)日：1998-05-28

申请号：DE19648747

申请日：1996-11-25

Applicant: BASF AG

Inventor： EGLY HORST ,  HUENGER HANS-HARALD ,  SAUER THOMAS DR

IPC: C07D201/16 ,  C08J11/02 ,  C08J11/06 ,  C08L77/02 ,  C07D223/10

Abstract: A process for recovering caprolactam and its oligomers by removing inorganic impurities from aqueous polycaprolactam extracts, in which the aqueous extract is continuously passed through an evaporator in such a way that the impurities are deposited on the heat exchange surfaces of the evaporator.

公开(公告)号：DE4218719A1

公开(公告)日：1993-12-09

申请号：DE4218719

申请日：1992-06-06

Applicant: BASF AG

Inventor： MATTHIES PAUL DR ,  HAHN KARL DR ,  MELL KARLHEINZ ,  SAUER THOMAS DR ,  WEINERTH KLAUS DR ,  LAUN MARTIN DR ,  HABERKORN HERBERT DR

IPC: C08G69/14 ,  C08G69/16 ,  D01F6/60 ,  D01F6/90 ,  D01D5/08 ,  D01D5/12

Abstract: Filaments with a relative viscosity RV of 2.0 to 3.0 (measured at a concentration of 1 g of fibres per 100 ml in a 96 wt % sulphuric acid) based on polycaprolactam, obtainable by: (a) extruding a melt consisting essentially of caprolactam through a spinning nozzle to form caprolactam filaments; (b) cooling the filaments thus produced and (c) drawing the cooled filaments off at a rate of at least [3600 + 1250.(3.0 - RV)] m/min, the polycaprolactam used being produced in the presence of at least one bicarboxylic acid from the group: C4-C10-alkane bicarboxylic acids, C5-C8-cycloalkane bicarboxylic acids, benzole and naphthaline bicarboxylic acids which may have up to two sulphonic acid groups and whose carboxylic acid groups are not adjacent, N-C1-C6-alkyl-N,N-di(C4-C10-alkane carboxylic acid)amine, 1,4-piperazine-di(C1-C10-alkane carboxylic acid), and a process for producing these filaments, their use for the production of fibers and flat products, and fibres and flat products made of these filaments.