公开(公告)号：DE59908999D1

公开(公告)日：2004-05-06

申请号：DE59908999

申请日：1999-07-17

Applicant: BASF AG

Inventor： BERGER ELKE ,  TISCHER GERLINDE ,  GUETTES BERND ,  BUETTNER JOHANNES ,  LAMPERT DR

IPC: C07C29/09 ,  C07C29/128 ,  C08G18/42 ,  C08G63/16 ,  C08G63/183 ,  C08G63/78 ,  C08J11/22

Abstract: Polyester polyol is prepared by polycondensation of an alcohol/ester mixture with a carboxylic acid mixture and polyalkylene terephthalate. Polyester polyols (I) based on alcohols and carboxylic acids and/or carboxylic acid derivatives as well as polyalkylene terephthalate are prepared by polycondensation of a raw material mixture containing (A) a mixture of one or more alcohols having at least 2 hydroxyl groups and 10-30 wt.% of a linear and/or cyclic ester compound, (B) a mixture of 10-33 wt.% succinic acid, 39-50 wt.% glutaric acid and 16-45 wt.% adipic acid and (C) polyalkylene terephthalate whereby the wt. ratio of (A):(B):(C) is 35-60:10-25:20-55.