公开(公告)号：DE2250496A1

公开(公告)日：1974-04-18

申请号：DE2250496

申请日：1972-10-14

Applicant: BASF AG

Inventor： BREUER HANS DR ,  BAUMANN KARL-HEINZ DIPL ING DR ,  NAEGELE PAUL ,  KUNDE JOACHIM DR

IPC: D01D5/34 ,  D01D5/28 ,  D01D3/00

公开(公告)号：DE2312816A1

公开(公告)日：1975-02-06

申请号：DE2312816

申请日：1973-03-15

Applicant: BASF AG

Inventor： BAUMANN KARL-HEINZ DIPL ING DR ,  WURMB ROLF DIPL CHEM DR ,  KUNDE JOACHIM DIPL CHEM DR ,  SCHLEMMER LOTHAR ,  BLECKMANN GERHARD ,  POHLEMANN HEINZ DIPL CHEM DR ,  WELZ MARTIN DIPL ING

IPC: B32B37/00 ,  B29C57/00 ,  B29C63/00 ,  B29C67/00 ,  B29C70/00 ,  B29C70/50 ,  B32B17/02 ,  B29D3/02

公开(公告)号：DE2656727A1

公开(公告)日：1978-06-29

申请号：DE2656727

申请日：1976-12-15

Applicant: BASF AG

Inventor： GEHM ROBERT DIPL CHEM DR ,  BAUMANN KARL-HEINZ DIPL ING DR ,  HARDER WOLFGANG DIPL CHEM DR

IPC: C08G65/02 ,  C08G65/26 ,  C08G65/30 ,  C08G65/329 ,  C08G65/00 ,  C07C43/11

Abstract: The immediate stoppage of a polyoxalkylation reaction in presence of a basic catalyst is effected by adding to the reaction mixt. (a) an alkylating agent, (b) a carboxylic acid halide, (c) a sulphonic acid halide, (d) a halogen deriv of methane and/or (e) a low mol.wt. organic cpd. contg. active halogen atoms. The blocking agents (one or more) are used to stop the polyaddn. of alkylene oxides (e.g. ethylene oxide) to low mol.wt. cpds. contg. active hydrogen (e.g. water, NH4OH, amines etc.) in presence of basic catalysts (e.g. Na methylate, KOH). Because of their rapid reaction, they prevent pollution of the atmosphere or possible explosion of the polymerisation vessel should the process get out of hand because of, e.g. too high a polymerisation temp. or pressure or too high an alkylene oxide content.