Evonik Degussa Gmbh

Evonik Operations Gmbh

Marcelo Rufo

Gamini Ananda Vedage

Kristen Elaine Minnich

Michael Ian Cook

Shiying Zheng

Daniel Iliev Totev

Compositions and curing agents comprising a benzylated Mannich base composition. The benzylated Mannich base composition includes a reaction product of (a) a substituted phenolic compound having at least one substituent of formula (I): wherein Ris each independently a linear or branched alkyl group having 1 to 4 carbon atoms, and Ris hydrogen, methyl, ethyl or phenyl, with (b) a benzylated polyalkylene polyamine (II): wherein Ris substituted or unsubstituted benzyl; Ris each independently R, or a hydrogen atom, or a group selected from C-Clinear, cyclic, and branched alkyl, alkenyl, and alkaryl groups; X, Y, and Z are independently selected from C-Calkylene, and cycloalkylene groups; y is an integer from 0 to 7, and z is an integer from 0 to 4; and, optionally, (c) a multifunctional amine. Amine-epoxy compositions and articles produced from these compositions are also disclosed.

Benzylated mannich base curing agents, compositions, and methods

Ketimines of benzylated polyamines and MEK are disclosed. The ketimines can be used as an epoxy curing agent and impart improved potlife, and enhanced blush and chemical resistance of cured epoxy coatings.

Ketimines of benzylated polyamines as curing agents

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Sao Paulo, Brazil

Marcelo Rufo