发明名称 |
Rigid foams prepared from treated toluene diisocyanate residue. |
摘要 |
<p>A method of treating toluene diisocyanate distillation residues comprising reacting the residues with at least 0.5 equivalents, based on hydrolyzable chloride concentration of the residues, of an epoxy compound at a temperature of from 155 to 220 DEG C to produce a treated distillation residue having a hydrolyzable chloride level of less than 800 parts per million (ppm) is taught. The product of the method is useful, for instance, in producing rigid foams with low K Factors.</p> |
申请公布号 |
EP0374932(B1) |
申请公布日期 |
1994.06.22 |
申请号 |
EP19890123705 |
申请日期 |
1989.12.21 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
NAFZIGER, JOHN LOWELL;LOWENKRON, STEVEN B.;KOEHLER, CHARLES E.;BHATTACHARJEE, DEBKUMAR |
分类号 |
C07C263/18;C07C263/20;C07C265/14;C08G18/00;C08G18/58;C08G18/70;C08G18/72;C08G18/76;C08G101/00;(IPC1-7):C07C265/14 |
主分类号 |
C07C263/18 |
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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