公开(公告)号：DE59811942D1

公开(公告)日：2004-10-21

申请号：DE59811942

申请日：1998-09-23

Applicant: BASF AG

Inventor： ROTERMUND DR ,  HEMPEL RENATE ,  SEIFERT DR ,  SCHMIADE WERNER

IPC: C08G18/40 ,  C08G18/42 ,  C08G18/48 ,  C08G18/66 ,  C08G18/67 ,  C08G101/00 ,  C08J9/14

Abstract: Emulsions containing polyether alcohols and polyester alcohols are used in the production of hard foams based on isocyanates to improve the temperature stability of the foams. Temperature-stable hard foams based on isocyanates are produced by reacting (a) polyisocyanates with (b) compounds with at least two hydrogen atoms reactive with isocyanate groups and (c) water in the presence of (d) propellants and optionally catalysts and auxiliary aids and additives. (b) comprises (bi) a polyether alcohol present in an amount of 0.2-80 wt.% and having a functionality of at least 1.5 and an OH number of 10-100 mg KOH/g, and (bii) a polyester alcohol present in an amount of 5-90 wt.%. (c) is present in an amount of maximum 2 wt.%. (d) contains hydrocarbons and/or hydrocarbons containing fluorine in an amount of 5-30 wt.%.

公开(公告)号：DE59711565D1

公开(公告)日：2004-06-03

申请号：DE59711565

申请日：1997-09-23

Applicant: BASF AG

Inventor： ROTERMUND DR ,  HEMPEL RENATE ,  SEIFERT DR ,  WIEGMANN WERNER

IPC: C08J9/12 ,  C08G18/06 ,  C08G18/48 ,  C08G18/50

Abstract: A process for the production of rigid polyurethane foam with improved thermodimensional stability and reduced thermal conductivity comprises reacting (a) polyisocyanates with (b) compounds with isocyanate-reactive hydrogen atoms in presence of (c) water and optionally (d) physical blowing agents and (e) catalysts and other additives etc. 60-100 wt% of component (b) consists of a polyol mixture containing (b1) a polyol obtained by addition of ethylene oxide (EO) and/or propylene oxide (PO) to a hexitol or hexitol mixture and (b2) a polyol obtained by addition of EO and/or PO to one or more aromatic amines, such that the total hexitol content and the total amine content of the polyol mixture is 15-30 wt% and 1-10 wt% respectively.

公开(公告)号：DE59811932D1

公开(公告)日：2004-10-21

申请号：DE59811932

申请日：1998-03-02

Applicant: BASF AG

Inventor： KNORR DR ,  ROTERMUND DR ,  BAUM EVA ,  SEIFERT DR ,  WIEGMANN WERNER

IPC: C08J9/08 ,  C08G18/48 ,  C08G18/50 ,  C08G18/66 ,  C08J9/14

Abstract: The production of rigid polyurethane (PUR) foam with a low bulk density (I) comprises reacting (a) polyisocyanates and/or modified polyisocyanates with (b) high-mol. wt. compound(s) with at least two reactive hydrogens and optionally (c) low-mol. wt. chain-extenders and/or crosslinkers in presence of (d) blowing agents, (e) catalysts and optionally (f) other additives etc. Component (d) consists of a mixture of (d-1) cyclopentane, (d-2) at least one 3-4C alkane and/or alkene which forms a homogeneous mixture with cyclopentane and (d-3) the carbon dioxide from the reaction of water and isocyanate. Component (b) comprises aromatic nitrogen-containing polyethers.