发明名称 |
POLYURETHAN-HARTSCHAUMSTOFFE |
摘要 |
The invention relates to rigid polyurethane foams which can be produced by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reacted toward isocyanate groups in the presence of c) blowing agents, wherein the polyisocyanate a) used is a mixture of diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates comprising a1) 30-35% by weight of diphenylmethane diisocyanate, a2) 21-28% by weight of polyphenylenepolymethylene polyisocyanate having three aromatic rings, a3) 8-13% by weight of polyphenylenepolymethylene polyisocyanate having four aromatic rings, a4) 24-41% by weight of polyphenylenepolymethylene polyisocyanate having five or more aromatic rings, where the percentages by weight of the components a1) to a4) are based on the total weight of the components a1) to a4) and add up to 100% by weight. |
申请公布号 |
AT475681(T) |
申请公布日期 |
2010.08.15 |
申请号 |
AT20080701336T |
申请日期 |
2008.01.09 |
申请人 |
BASF SE |
发明人 |
SEIFERT, HOLGER;KLASSEN, JOHANN;DU RIEU, LOUIS;WIEGMANN, WERNER;MATZKE, GUENTER |
分类号 |
C08G18/76;C07C263/00 |
主分类号 |
C08G18/76 |
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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