发明名称 |
Aromatic cyclotriphosphazenes |
摘要 |
4-Aminophenoxy cyclotriphosphazenes are reacted with maleic anhydride to produce maleamic acids which are converted to the maleimides. The maleimides are polymerized. By selection of starting materials (e.g. hexakis amino or trisaminophenoxy-trisphenoxy-cyclotriphosphazenes), selection of molar proportions of reactants, use of mixtures of anhydrides and use of dianhydrides as bridging groups a variety of maleimides and polymers are produced. The polymers have high limiting oxygen indices, high char yields and other useful heat and fire resistant properties making them useful as, for example, impregnants of fabrics.
|
申请公布号 |
US4748263(A) |
申请公布日期 |
1988.05.31 |
申请号 |
US19860924467 |
申请日期 |
1986.10.29 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION |
发明人 |
KUMAR, DEVENDRA;FOHLEN, GEORGE M.;PARKER, JOHN A. |
分类号 |
C07F9/6593;C08G73/12;(IPC1-7):C07F9/00 |
主分类号 |
C07F9/6593 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|