Process for the preparation of maleimide containing compounds

Details Process for the preparation of maleimide containing compounds Process for the preparation of maleimide containing compounds

1993-08-27

1994-06-07

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525218, 526225, 526233, 526234, 526237, 528310, C08F 2058

Patent

active

053190475

ABSTRACT:
The present invention relates to a process for the preparation of N-(hydroxyphenyl)maleamic acid and various dimers and oligomers thereof. The process is characterized by heating, in the absence of any solvent, N-(hydroxyphenyl)maleamic acid at a temperature ranging from about 150.degree. to about 250.degree. C. in the presence of an acid catalyst. This unique process avoids the need to recover expensive highly polar solvents. The present invention also relates to use of these maleimide containing compounds in rubber. The use of the blend of hydroxyphenyl maleimide and the various dimers and low molecular weight oligomers impart superior properties to rubber when compared to the use of hydroxyphenyl maleimide alone in rubber.

REFERENCES:
patent: 4433114 (1984-02-01), Coran et al.
patent: 5049618 (1991-09-01), Wideman et al.
P. O. Tawney et al., "Vulcanization with Maleimides", J. Applied Polymer Sci., 8, 352-366 (Jun. 1964).

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