公开(公告)号：CA1204121A

公开(公告)日：1986-05-06

申请号：CA439765

申请日：1983-10-26

Applicant: BASF AG

Inventor： BUETHE INGOLF ,  MARX MATTHIAS ,  SCHLEIER GISBERT ,  PETERS REINHARD

IPC: C08G18/10 ,  C08G18/48 ,  C08G18/76 ,  C08G18/80 ,  C07C125/077 ,  C08G18/79

Abstract: DIPHENYLMETHANE DIISOCYANATE-BASED LIQUID POLYISOCYANATE MIXTURES CONTAINING URETHANE GROUPS, PROCESS FOR THEIR PREPARATION AND THEIR USE FOR THE PREPRATION OF FLEXIBLE POLYURETHANE FOAMS Diphenylmethane diisocyanate-based liquid polyisocyanate mixtures containing urethane groups and having an isocyanate content of from 12 to 30 percent by weight are obtained by reaction of a polyoxypropylene polyoxyethylene polyol containing 5 to 30 percent by weight of oxyethylene with diphenylmethane diisocyanate-based isocyanates. These polyisocyanate mixtures are storage stable at low temperature and yield flexible polyurethane foams having improved mechanical properties.

公开(公告)号：CA2031909C

公开(公告)日：1998-06-02

申请号：CA2031909

申请日：1990-12-10

Applicant: BASF AG

Inventor： LUTTER HEINZ-DIETER ,  HINZ WERNER ,  DECKER WALTER ,  LEPPKES REINHARD ,  REICH ERHARD ,  PETERS REINHARD ,  HAASE VOLKER ,  LUGMAYR MICHAEL

IPC: C08G18/48 ,  C08G18/72 ,  C08G65/26 ,  C08G65/28 ,  C08G101/00 ,  C08J9/00 ,  C08L71/02 ,  C08J9/04 ,  C08G18/12 ,  C08G59/14 ,  C08G18/28

Abstract: Flexible polyurethane foams having low compressive strength and relatively good tensile strength are prepared by reacting a) a block polyoxypropylene-polyoxyethylene-polyol mixture which has a hydroxyl number of from 14 to 65, contains from 2 to 9% by weight, based on the weight of the polyoxypropylene units, of ethylene oxide units bonded in the terminal position and is prepared by anionic polymerization of the alkylene oxides with an initiator mixture having an average functionality of from 2.3 to 2.8 and consisting of water and glycerol and/or trimethylolpropane, or a mixture of these block polyoxypropylene-polyoxyethylene-polyol mixtures with bi- and/or trifunctional polyoxypropylenepolyoxyethylene-polyols having a hydroxyl number of from 20 to 70, and b) if required, low molecular weight chain extenders with c) organic and/or modified organic polyisocyanates in the presence of d) catalysts, e) blowing agents, preferably water, and if required, f) assistants and/or additives.