发明名称 |
Verfahren zur Herstellung von Polyurethan-Hartschaumstoffen mit geringer Wärmeleitfähigkeit und ihre Verwendung |
摘要 |
The invention relates to a process for preparation of rigid polyurethane foams having low thermal conductivity by reacting … … a) organic and/or modified organic polyisocyanates with … b) at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and optionally … c) low molecular weight chain extenders and/or crosslinking agents in the presence of … d) cyclopentane (d1) or mixtures (d2) which contain: … … d2i) cyclopentane and/or cyclohexane and … d2ii) at least one compound which is homogeneously miscible with cyclopentane and/or cyclohexane and preferably has a boiling point below 35 DEG C, selected from the group consisting of the alkanes, cycloalkanes having not more than 4 carbon atoms, dialkyl ethers, cycloalkylene ethers and fluoroalkanes,… optionally in conjunction with water, as blowing agents (d), … … e) catalysts and optionally … f) auxiliaries and/or additives. … …<??>The rigid polyurethane foams are used in the refrigerator industry and as insulating material in heating and composite elements. |
申请公布号 |
DE3933335(C2) |
申请公布日期 |
1998.08.06 |
申请号 |
DE19893933335 |
申请日期 |
1989.10.06 |
申请人 |
BASF AG, 67063 LUDWIGSHAFEN, DE |
发明人 |
VOLKERT, OTTO, DR., 6719 WEISENHEIM, DE |
分类号 |
B32B27/00;C08G18/00;C08G18/42;C08G18/48;C08G18/76;C08J9/12;C08J9/14;C08L75/04;F25D11/00 |
主分类号 |
B32B27/00 |
代理机构 |
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