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公开(公告)号:DE59100547D1
公开(公告)日:1993-12-09
申请号:DE59100547
申请日:1991-04-19
Applicant: BASF AG
Inventor: PIPPER GUNTER , MUELLER WOLFGANG F DR , DAUNS HARALD DR
Abstract: A process is claimed for the prodn. of linear polyamides (I) from 4-15C diamines (II) and 4-15C dicarboxylic acids (III) by solid-phase condensation of the corresp. salts in the presence of phosphorus cpds. (IV) as catalysts; the process comprises: (a) reaction of (II) with (III) in a liq. medium at elevated temp., with addn. of (IV) to give a soln., suspension or dispersion of the salt, (b) removing the liq. medium to give solid salt contg. (IV), (c) heating the salt under inert gas at a temp. between 130-5 deg.C below the m.pt. of the salt to give a precondensate with total end-gp. equiv. wt. 5000-12000 m-equiv./kg and (d) further condensation to the required deg. at a temp. above that used in stage (c).
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公开(公告)号:DE4013873A1
公开(公告)日:1991-10-31
申请号:DE4013873
申请日:1990-04-30
Applicant: BASF AG
Inventor: PIPPER GUNTER , MUELLER WOLFGANG F DR , DAUNS HARALD DR
Abstract: A process is claimed for the prodn. of linear polyamides (I) from 4-15C diamines (II) and 4-15C dicarboxylic acids (III) by solid-phase condensation of the corresp. salts in the presence of phosphorus cpds. (IV) as catalysts; the process comprises: (a) reaction of (II) with (III) in a liq. medium at elevated temp., with addn. of (IV) to give a soln., suspension or dispersion of the salt, (b) removing the liq. medium to give solid salt contg. (IV), (c) heating the salt under inert gas at a temp. between 130-5 deg.C below the m.pt. of the salt to give a precondensate with total end-gp. equiv. wt. 5000-12000 m-equiv./kg and (d) further condensation to the required deg. at a temp. above that used in stage (c).
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公开(公告)号:ES2227760T3
公开(公告)日:2005-04-01
申请号:ES98122551
申请日:1998-12-02
Applicant: BASF AG
Inventor: BARTHOLOMAUS PETER , DAUNS HARALD DR , FRIEDL THOMAS DR , SCHOLZ GUNTER DR , LOOCK HERBERT , LUKAT WALTER
IPC: B29B7/00 , B29B7/88 , B29B9/04 , B29B9/10 , B29B9/12 , B29B11/10 , B29B13/10 , B29K75/00 , C08G18/00 , C08G18/08 , C08G18/65
Abstract: SE PROPONE UN PROCEDIMIENTO PARA LA ELABORACION CONTINUA DE GRANULADO A PARTIR DE ELASTOMEROS TERMOPLASTICOS DE POLIURETANO, DONDE PRIMERO SE EFECTUA TRANSFORMACION A PARTIR DE A) DIISOCIANATOS ORGANICOS, B) COMPUESTOS POLIHIDROXILO DIFUNCIONALES CON PESO MOLECULAR DE 500 HASTA 8.000 Y C) AGENTES DE ALARGAMIENTO DE CADENA DIFUNCIONALES CON PESOS MOLECULARES DESDE 60 HASTA 400 EN PRESENCIA DE D) CATALIZADORES, ASI COMO EVENTUALMENTE E) MEDIOS AUXILIARES Y/O SUSTANCIAS ADICIONALES A TEMPERATURAS DESDE 50 HASTA 250 °C SOBRE UNA BANDA SOPORTE CIRCULANTE, GENERANDOSE UN MATERIAL (3) EN FORMA DE BANDA, QUE A CONTINUACION SE FUNDE, SE HOMOGEINIZA Y SE GRANULA EN UN EXTRUSIONADOR (9). EL MATERIAL EN FORMA DE BANDA SE DESMENUZA EN UN DISPOSITIVO (5) DE HOMOGENEIZACION Y DESMENUZAMIENTO DISPUESTO INMEDIATAMENTE EN EL EXTREMO DE LA BANDA Y SE GUIA A UN EXTRUSIONADOR (9) ABRIDADO AL DISPOSITIVO (5) DE DESMENUZACION Y HOMOGENEIZACION. EL PROCEDIMIENTO ES APROPIADO ESPECIALMENTE PARA ELABORACION DE GRANULADO PARA OBJETOS DE EXTRUSION, DE FUNDICION DE INYECCION O DE CALANDRIA Y LA OBTENCION OPTIMA DE OPACIDAD ASI COMO PARA LA ELABORACION DE MEZCLAS.
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公开(公告)号:DE4412317A1
公开(公告)日:1994-10-27
申请号:DE4412317
申请日:1994-04-11
Applicant: BASF AG
Inventor: STERZEL HANS-JOSEF DR , RUETTER HEINZ DR , DAUNS HARALD DR , MATTHIES HANS GEORG DR , MINGES ROLAND DR
Abstract: Polylactide having a number average molecular weight of greater than 30,000 or a weight average molecular weight of greater than 60,000, where in each case a 5 to 15% portion by weight is in the molecular weight range of up to 10,000 and in the molecular weight range above 500,000, and a process for the preparation thereof.
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