N-alkyl maleimide thermal stabilizers for vinyl halide polymers

Details N-alkyl maleimide thermal stabilizers for vinyl halide polymers N-alkyl maleimide thermal stabilizers for vinyl halide polymers

1990-12-28

1992-09-01

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524105, 524109, 524111, 548548, 548549, C07D20727, C07D207267, C07D40504, C07K 53415

Patent

active

051439530

ABSTRACT:
Thermal stability of vinyl halide polymers is enhanced by the use of dienophiles such as N-alkyl maleimides, and bis compounds thereof, disclosed herein. The maleimides and bis compounds thereof produce synergistic results in terms of thermal stability of vinyl halide polymers when used in conjunction with conventional metal-containing thermal stabilizers. Environmental concerns are abated and certain other advantages are realized if the maleimides disclosed herein are used in conjunction with conventional nonmetallic thermal stabilizers to stabilize vinyl halide polymers against heat deterioration. Bis compounds of the N-alkyl maleimides disclosed herein, when used as thermal stabilizers for vinyl halide polymers, promote crosslinking without degrading the vinyl halide polymer.

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N-Substituted Maleimides as Thermal Stabilizers For Rigid Polyvinylchloride By M. W. Sabaa, M. G. Mikhael, N. A. Mohamed & A. A. Yassin which appeared in Die Angewandte Makromolekulare Chemie 168 (1989) 23-35 (Nr. 2718).
N-Substituted Maleimides As Thermal Stabilizers For Plasticized Poly(Vinyl Chloride) By Magdy W. Sabaa, M. G. Mikhael, N. A. Mohamed & A. Y. Yassin which appeared in Polymer Degradation and Stability 27 (1990) 319-336.
Dynamic Vulcanization of PVC-Epoxidized Natural Rubber Miscible Blend: The Effects of Dimaleimide Crosslinking By K. T. Varughese, P. P. De & S. K. Sanyal in Die Angewandte Makromoleculare Chemie 182 (1990) 73-83 (Nr. 3049, especially pp. 79-82.

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