发明名称 |
Production of rigid polyurethane foams |
摘要 |
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. |
申请公布号 |
KR19980024901(A) |
申请公布日期 |
1998.07.06 |
申请号 |
KR19970048418 |
申请日期 |
1997.09.24 |
申请人 |
BASF AG |
发明人 |
ROTERMUND UDO DR;HEMPEL RENATE;SEIFERT HOLGER DR;WIEGMANN WERNER |
分类号 |
C08J9/12;C08G18/06;C08G18/48;C08G18/50 |
主分类号 |
C08J9/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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