Uniroyal Chemical Company, Inc.

Other

Paul E Stott

Gerald J Abruscato

Howard Stephen Friedman

Anthony Vincent Grossi

Elmar H Jancis

John M DeMassa

Mark C Richardson

Lawrence B Barry

Bruce W Downs

This invention relates to a vinyl aromatic, especially styrene, polymerization inhibitor system comprising an N-phenyl-1,4-benzoquinoneimine compound and optionally an aryl-substituted phenylenediamine.

Benzoquinoneimines as vinyl aromatic polymerization inhibitors

This invention is directed to certain N,N&prime;-dinitroso phenylenediamines useful as polymerization inhibitors for acrylic acids and esters thereof. Also disclosed are compositions containing such compounds, and methods for inhibiting polymerization using such compounds and compositions.

Polymerization inhibitors for acrylic acids and esters

This invention relates to a blend of different isomers of a compound represented by structure I ##STR1## wherein R is C.sub.9 -C.sub.20 alkyl; wherein Y is NO.sub.2 or SO.sub.3 R' or H; wherein R' is C.sub.1 -C.sub.20 alkyl; wherein X is NO.sub.2 or C.sub.1 -C.sub.20 alkyl; and wherein R' is H or C.sub.1 -C.sub.20 alkyl, m is 2 or 3, and n is 0, 1, 2, 3, with the provisos: (1) that Y may not be H and X may not be NO.sub.2 when n=0 and (2) that when R is C.sub.9 and n=0, X and Y may not both be NO.sub.2.

Polymerization inhibitor for vinyl aromatics

This invention relates to a vinyl aromatic. Compounds of Structure (I): ##STR1## wherein R is C.sub.9 -C.sub.20 alkyl, Y is NO.sub.2, SO.sub.3 R' or H, R' is C.sub.1 -C.sub.20 alkyl, X is NO.sub.2 or C1-C.sub.20 alkyl, and R' is H or C.sub.1 -C.sub.20 alkyl, m is 2 or 3 and n is 0,1,2,3, with the proviso that when R is C.sub.9 and n=O, X and Y may not both be NO.sub.2.

The invention relates to the use of certain styrenated diphenylamine and hindered phenol compositions for the stabilization of polyether polyols.

Stabilization of polypols with liquid antiscorch composition

Vinyl aromatic compounds are stabilized against polymerization by the addition of an effective amount of a polymerization inhibition composition comprising (a) a phenothiazine compound; and (b) an aryl-substituted phenylenediamine compound. In other aspects, this invention is directed to a vinyl aromatic composition stabilized against polymerization by such polymerization inhibitor composition, as well as to a method of stabilizing a vinyl aromatic composition against polymerization which method comprises adding an effective amount of such polymerization inhibitor composition.

Polymerization inhibitor composition for vinyl aromatic compounds

A vinyl aromatic composition stabilized against polymerization comprising (a) a vinyl aromatic compound and (b) an effective amount of a stabilizer system in which the active ingredient consists essentially of an oxygenated species formed by the reaction of oxygen and an N-aryl-N'-alkyl-p-phenylenediamine. Also disclosed is a process for inhibiting the polymerization of vinyl aromatic compounds employing such an oxygenated species.

Stabilized vinyl aromatic composition

Compositions, comprised of a dinitrophenol in an aromatic hydrocarbon solvent, which compositions further comprise a sufficient amount of a phenylenediamine such that a greater amount of dinitrophenol is in solution than would be present in solution if such phenylenediamine were not present, exhibit unexpectedly desirable low temperature stability, and may be diluted with additional solvent to be employed as polymerization inhibitors for vinyl aromatic compounds.

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Sandy Hook, CT, United States of America

Paul E Stott