公开(公告)号：DE10237954A1

公开(公告)日：2004-03-04

申请号：DE10237954

申请日：2002-08-20

Applicant: BASF AG

Inventor： PINKOS ROLF ,  KAESHAMMER STEFAN ,  MENGER VOLKMAR ,  HAUBNER MARTIN ,  GROLL PETER ,  SCHLITTER STEPHAN ,  PFAFF KLAUS-PETER

IPC: C07D307/08 ,  C08G65/20 ,  C08G65/26 ,  C07D307/04

Abstract: A process for the continuous production of tetrahydrofuran (THF) by reaction of a 1,4-butanediol reaction mixture at a heteropolyacid catalyst that has not been pre-dried is characterized in that the reaction mixture contains 2-(4-hydroxybutoxy)tetrahydrofuran.

公开(公告)号：CA2061062A1

公开(公告)日：1992-08-13

申请号：CA2061062

申请日：1992-02-12

Applicant: ABEL ULRICH ,  LEHRICH FRIEDHELM ,  STRAEHLE WOLFGANG ,  GROLL PETER ,  BASF AG

Inventor： ABEL ULRICH ,  LEHRICH FRIEDHELM ,  STRAEHLE WOLFGANG ,  GROLL PETER

IPC: C08G18/00 ,  C08G18/48 ,  C08G18/58 ,  C08G18/66 ,  C08K5/15 ,  C08L75/08 ,  C08L71/00 ,  C08J9/06

Abstract: The invention relates to a process for the preparation of polyurethane elastomers by reacting …… a) organic and/or modified organic polyisocyanates with … b) at least one relatively high-molecular-weight polyoxybutylene- polyoxyalkylene glycol from the group consisting of polyoxybutylene- polyoxyethylene glycol, polyoxybutylene-polyoxypropylene glycol and/or polyoxybutylene- polyoxypropylene-polyoxyethylene glycol, … c) at least one chain extender and/or crosslinking agent and … d) at least one glycidyl compound containing units of the structure … … in which …… n is a number from 1 to 6, … X is an alkylene, arylene, -O- or -N- bridging member, and … R and R are identical or different radicals from the group consisting of hydrogen, methyl and ethyl, … in the presence or absence of … e) blowing agents, … f) catalysts, and … g) assistants and/or additives, … and mixtures of polyoxybutylene-polyoxyalkylene glycols (b) and glycidyl compounds (d).