发明名称 |
Verfahren zur Herstellung von Blockschaum |
摘要 |
The invention relates to a method for the production of polyurethane block foam, wherein a polyurethane reactive mixture containing carbon dioxide is suddenly relieved from a pressure above the pressure breaking the equilibrium of the carbon dioxide to a normal pressure, wherein the liquid polyurethane reactive mixture is foamed by releasing dissolved carbon dioxide. The foamed mixture is placed on a substrate and then hardened into block foam, wherein the carbon dioxide or at least one of the components polyol and isocyanate is initially dissolved in the reactive mixture at a pressure that is substantially above the pressure breaking the equilibrium, the pressure is subsequently lowered to a pressure close to the pressure breaking the equilibrium, wherein the pressure falls below the pressure breaking the equilibrium by releasing small amounts of carbon dioxide and forming a microdispersion of bubbles, the components are optionally mixed and a sudden pressure drop to normal pressure occurs before the carbon dioxide released is completely dissolved.
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申请公布号 |
DE10030384(A1) |
申请公布日期 |
2002.01.03 |
申请号 |
DE20001030384 |
申请日期 |
2000.06.21 |
申请人 |
HENNECKE GMBH |
发明人 |
SULZBACH, HANS-MICHAEL;RAFFEL, REINER;SCHAMBERG, MARTIN |
分类号 |
B29C39/26;B29C39/02;B29C39/24;B29C39/44;B29C44/34;B29C44/46;B29C44/60;B29K75/00;B29K105/04;C08G18/08;C08J9/12;(IPC1-7):C08J9/30;C08J9/08;B29C44/36 |
主分类号 |
B29C39/26 |
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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