发明名称 |
WERKWIJZE OM GESTABILISEERDE TOLUEENDIISOCYANAATMENGSELS TE BEREIDEN. |
摘要 |
A process for preparing a tolylene diisocyanate (TDI) composition containing about 5-19 percent by weight nominal TDI trimer and having improved stability by heating a TDI composition containing about 25-40 percent nominal TDI trimer and an amount of TDI dimer such that the dimer/trimer ratio is greater than about 0.14 at a temperature of at least about 130 DEG C. until the dimer/trimer ratio is less than about 0.14 and diluting the resulting composition with a monomeric TDI composition to achieve a nominal trimer concentration of about 5-19 percent. |
申请公布号 |
NL169586(C) |
申请公布日期 |
1982.08.02 |
申请号 |
NL19700014979 |
申请日期 |
1970.10.13 |
申请人 |
THE DOW CHEMICAL COMPANY TE MIDLAND, MICHIGAN, VER. ST. V. AM. |
发明人 |
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分类号 |
C07C265/12;C07D251/34;C08G18/79;C08L75/04;C09D175/00;(IPC1-7):07C119/048;07D251/30 |
主分类号 |
C07C265/12 |
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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