公开(公告)号：ES2172208T3

公开(公告)日：2002-09-16

申请号：ES98949005

申请日：1998-10-05

Applicant: BASF AG

Inventor： HEITZ THOMAS ,  BRAUNE PETER ,  FISCH HERBERT ,  PELLKOFER ERICH ,  SCHNEIDER GEORG

IPC: G02B6/44 ,  B29C47/00 ,  B29C49/00 ,  C08G63/78 ,  C08J5/00 ,  C08L67/02 ,  H01B3/42

Abstract: The invention relates to the use of thermoplastic polyester molding compounds, containing A) 80 to 100 wt. % of a polyalkylene arylate, especially polybutyleneterephthalate, with a half-width of crystallization heat releases of

公开(公告)号：DE59802677D1

公开(公告)日：2002-02-21

申请号：DE59802677

申请日：1998-10-05

Applicant: BASF AG

Inventor： HEITZ THOMAS ,  BRAUNE PETER ,  FISCH HERBERT ,  PELLKOFER ERICH ,  SCHNEIDER GEORG

IPC: G02B6/44 ,  B29C47/00 ,  B29C49/00 ,  C08G63/78 ,  C08J5/00 ,  C08L67/02 ,  H01B3/42

Abstract: The invention relates to the use of thermoplastic polyester molding compounds, containing A) 80 to 100 wt. % of a polyalkylene arylate, especially polybutyleneterephthalate, with a half-width of crystallization heat releases of

公开(公告)号：DE59507110D1

公开(公告)日：1999-12-02

申请号：DE59507110

申请日：1995-01-07

Applicant: BASF AG

Inventor： BRAUNE PETER

IPC: C08G63/83 ,  C08K5/05

公开(公告)号：ES2135882T3

公开(公告)日：1999-11-01

申请号：ES96907364

申请日：1996-03-06

Applicant: BASF AG

Inventor： BRAUNE PETER

IPC: C07C29/80 ,  C07C29/88 ,  C07C31/20 ,  C08G63/78

Abstract: PCT No. PCT/EP96/00940 Sec. 371 Date Sep. 4, 1997 Sec. 102(e) Date Sep. 4, 1997 PCT Filed Mar. 6, 1997 PCT Pub. No. WO96/29358 PCT Pub. Date Sep. 26, 1996A process for working up dihydroxy compound residues from the preparation of polyesters by a) a first step of (trans)esterifying a dicarboxylic acid or its esters or ester-forming derivatives with a molar excess of a dihydroxy compound, b) at least one second step of polycondensing the esterification product of a), and c) subjecting the vapors from the reaction of a) and b) to a treatment for recovering the starting materials, comprises 1) combining the vapors of step a) and some of the vapors of step b) of the process in at least one column A) and removing the low boiling constituents of the vapors overhead and recycling the bottom product, which predominantly contains the excess dihydroxy compounds and also oligomeric and polymeric reaction products, into step a), and 2) transferring the other part of the vapors of step b) of the process into at least one column B) and removing the low boiling constituents of the vapors overhead and discharging the bottom product from the column and subsequently subjecting it to a further treatment for recovering the dihydroxy compound.

公开(公告)号：DE19814529A1

公开(公告)日：1999-10-07

申请号：DE19814529

申请日：1998-04-01

Applicant: BASF AG

Inventor： HEITZ THOMAS ,  HEEL HELMUT ,  BRAUNE PETER ,  KLATT MARTIN

IPC: C08J5/00 ,  C08G63/183 ,  C08G63/78 ,  C08L67/02 ,  C08L69/00 ,  C08L77/00 ,  C08G63/181 ,  C08G63/40

Abstract: According to the inventive method for producing polyalkylene arylates, an aromatic dicarboxylic acid or its esters or ester-forming derivatives is/are esterified or transesterified with a molar excess of an aliphatic dihydroxy compound and the resulting transesterification or esterification product is polycondensed. The invention is characterised in that the prepolymer is polycondensed with a viscosity number (VZ) of