Patent ID: 6039895
Filing Date: 2000-03-21
Classification: C07C

Abstract:
A polymerization inhibitor system comprising an N-phenyl-1,4-benzoquinoneimine compound having the formula: ##STR6## wherein R is NR.sup.1 R.sup.2 ; wherein R.sup.1 is C.sub.1 -C.sub.8 alkyl and R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.16 alkaryl and C.sub.3 -C.sub.8 cycloalkyl; and R.sup.4 and R.sup.5 are independently selected from the group consisting of hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.4 -C.sub.8 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.16 alkaryl.