发明名称 |
Process for preparing closed-cell water-blown rigid polyurethane foams having improved mechanical properties |
摘要 |
The present invention is directed to a process for preparing water-blown rigid polyurethane foams having at least an 80% closed-cell content which involves reacting a) at least one polyol mixture which is composed of (i) at least one polymer polyol; (ii) at least one polyol having a hydroxyl value within the range of from about 200 to about 800; and (iii) optionally, at least one polyol having a hydroxyl value within the range of from about 25 to about 115; with b) at least one polymeric isocyanate and/or a prepolymer thereof; in the presence of c) optionally, at least one catalyst; d) water; and e) optionally, at least one additive or auxiliary agent. The present invention is also directed to the closed-cell water blown rigid polyurethane foams produced by the process of the present invention. The invention is further directed to a polyurethane-foam forming mixture which is used to produce the water-blown rigid polyurethane foams of the present invention. Foams produced according to the present invention have reduced friability and acceptable adhesion to substrates as well as acceptable compressive strength.
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申请公布号 |
US2005020705(A1) |
申请公布日期 |
2005.01.27 |
申请号 |
US20040922399 |
申请日期 |
2004.08.20 |
申请人 |
HAIDER KARL W.;NODELMAN NEIL H.;FORSYTHE JOHN P.;SUDDABY BRIAN R. |
发明人 |
HAIDER KARL W.;NODELMAN NEIL H.;FORSYTHE JOHN P.;SUDDABY BRIAN R. |
分类号 |
C08G18/10;C08G18/40;(IPC1-7):C08J9/00;C08G18/00 |
主分类号 |
C08G18/10 |
代理机构 |
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