发明名称 |
Polyol composition having good flow and formic acid blown rigid polyurethane foams made thereby having good dimensional stability |
摘要 |
A polyol composition is provided which when reacted with an organic isocyanate, has good flow characteristics and makes a rigid polyurethane foam having good dimensional stability at low densities. The polyol composition has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25 DEG C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and a viscosity of 5,000 cp or less at 25 DEG C. The polyol composition also has formic acid or a mixture of formic acid and water as blowing agents, and further contains a delayed action blow catalyst and a delayed action gel catalyst.
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申请公布号 |
US5770635(A) |
申请公布日期 |
1998.06.23 |
申请号 |
US19950506797 |
申请日期 |
1995.12.15 |
申请人 |
BASF CORPORATION |
发明人 |
LEE, THOMAS B.;FISHBACK, THOMAS L.;REICHEL, CURTIS J. |
分类号 |
C08G18/08;C08G18/16;C08G18/18;C08G18/48;C08J9/14;(IPC1-7):C08J9/08;C08J9/04 |
主分类号 |
C08G18/08 |
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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