公开(公告)号：US3839413A

公开(公告)日：1974-10-01

申请号：US75275568

申请日：1968-08-15

Applicant: HOECHST AG

Inventor： WOLFF W ,  FABER R ,  RUCHLACK K

IPC: A01N25/30 ,  B01F17/00 ,  C08G18/28 ,  C08G18/48 ,  C10G33/04 ,  C07C125/06

CPC classification number: C08G18/283 ,  A01N25/30 ,  B01F17/005 ,  B01F17/0085 ,  C08G18/4837 ,  C08G18/4841 ,  C10G33/04 ,  Y10S516/07

Abstract: 1. A PROCESS FOR PREPARATION OF DIURETHANES WHICH COMPRISES REACTING 1 MOL OF A BULK POLMER OF A MOLECULAR WEIGHT OF 1,000 TO 6,000 CONSISTING OF A WATER-INSOLUBLE POLYETHER OF A MOLECULAR WEIGHT OF 500 TO 3,000 ON THE BASIS OF PROPYLENE OXIDE, BUTYLENE OXIDE OR EPICHLOROHYDRINE, TO WHICH 35 TO 100%, REFERRED TO THE WEIGHT OF THE POLYETHER, OF ETHYLENE OXIDE WAS ADDED, AND 1 MOL OF A POLYETHER ALCOHOL OF THE FORMULA

R-(C2H4O)NH

IN WHICH R IS ALKYL OF 8 TO 18 CARBON ATOMS, MONO-, BISOR TRIS-ALKYL-BENZENE OR MONO-, BIS- OR TRIS-ALKYL NAPHTHALENE, EACH ALKYL CONTAINING 4 TO 22 CARBON ATOMS, AND N IS AN INTEGER OR 2 TO 10, WITH 1 MOL OF A DIISOCYANATE AT A TEMPERATURE OF 100 TO 200*C. IN THE MELT OR IN THE PRESENCE OF AN INERT ORGANIC SOLVENT.