公开(公告)号：EP1560877A1

公开(公告)日：2005-08-10

申请号：EP03758019.8

申请日：2003-10-18

申请人： BASF AKTIENGESELLSCHAFT

发明人： PLACHETTA, Christoph ,  HECKMANN, Manfred ,  HÜNGER, Hans-Harald ,  WEISS, Robert

IPC分类号： C08K3/22 ,  B01F7/00 ,  B01F7/16

CPC分类号： B01F7/00758 ,  B01F3/1221 ,  B01F7/164 ,  C08K3/22 ,  C08K2003/2241 ,  C08L77/00

摘要： Disclosed is a method for producing a polyamide containing titanium dioxide pigments. Said method is characterized by the fact that titanium dioxide pigments are dispersed in an initial mixture containing water and caprolactam by means of a device comprising a dispersion chamber, a disk-shaped rotor that is disposed inside said dispersion chamber, a stator that is provided with radial openings, is arranged within the dispersion zone of the dispersion chamber, and is connected to the rotor, a substance inlet located on each side of the rotor, preferably with a respective axial duct section such that the two flows of substance are combined in the peripheral edge area of the rotor disk, and a product outlet which is placed on the outer edge of the dispersion zone of the dispersion chamber, by feeding the titanium dioxide pigments to the dispersion chamber through one of said substance inlets while feeding the initial mixture containing water and caprolactam to the dispersion chamber through the other of said substance inlets, whereby a product mixture containing water, caprolactam, and the used titanium dioxide pigment is obtained via the product outlet, and the product mixture is polymerized so as to obtain a polyamide containing titanium dioxide pigments. Also disclosed are polyamides obtained according to the inventive method and the use of such polyamides as a masterbatch.

公开(公告)号：EP1056799B1

公开(公告)日：2002-04-24

申请号：EP98962392.1

申请日：1998-11-24

申请人： BASF AKTIENGESELLSCHAFT

发明人： HÜNGER, Hans-Harald ,  LUDWIG, Alfons ,  NEUBERG, Rainer ,  PIPPER, Gunter ,  SAUER, Thomas ,  WILMS, Axel

IPC分类号： C08G69/14 ,  C08G69/46

CPC分类号： C08G69/46 ,  C08G69/04 ,  C08G69/16

摘要： A process is disclosed for producing polyamides. The extracted water produced from polyamide extraction is concentrated up to an extract content of maximum 85 wt.% and is mixed with fresh lactam up to a 0.5-13 wt.% water content, at least one adiabatic stress relief being carried out during polymerisation.

公开(公告)号：EP1056799A1

公开(公告)日：2000-12-06

申请号：EP98962392.1

申请日：1998-11-24

申请人： BASF AKTIENGESELLSCHAFT

发明人： HÜNGER, Hans-Harald ,  LUDWIG, Alfons ,  NEUBERG, Rainer ,  PIPPER, Gunter ,  SAUER, Thomas ,  WILMS, Axel

IPC分类号： C08G69/14 ,  C08G69/46

CPC分类号： C08G69/46 ,  C08G69/04 ,  C08G69/16

摘要： A process is disclosed for producing polyamides. The extracted water produced from polyamide extraction is concentrated up to an extract content of maximum 85 wt.% and is mixed with fresh lactam up to a 0.5-13 wt.% water content, at least one adiabatic stress relief being carried out during polymerisation.

摘要翻译： 公开了一种生产聚酰胺的方法。 将由聚酰胺萃取产生的萃取水浓缩至最高85重量％的萃取物含量，并将其与新鲜内酰胺混合至高达0.5-13重量％水含量，在聚合过程中进行至少一次绝热应力消除。