Evonik Degussa Gmbh

Oliver Erpeldinger

Manfred Neumann

Phillip R James

Stefanie Rinker

Felix Nissen

Frank Kraushaar

Bettina Ludwig

Peter Watkins

Stefanie Weyler

Bettina Bressel

A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I),  Compositions (AB) comprising (A) and (B) are also provided.

Process and composition for inhibiting the polymerization of cyclopentadiene compounds

A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I), Compositions (AB) comprising (A) and (B) are also provided.

An olefinically unsaturated monomer is stabilized by a retarder-containing composition which comprises a solvent and a quinone methide as a retarder.

Process for stabilizing olefinically unsaturated monomers

A method for preparing a substituted 1,4-quinone methide from a 3,5-disubstituted 4-hydroxybenzaldehyde is provided. Also provided is a method to prepare a 3,5-disubstituted 4-hydroxybenzaldehyde from the corresponding 2,6-disubstituted phenol.

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Wuelfrath, Germany

Oliver Erpeldinger