Henkel Corporation

Cognis Corporation

Joseph L Mulvey

Shailesh Shah

Reuben H Grinstein

John G Papalos

Brian G Jewell

Shailesh C Shah

Anbazhagan Natesh

Ronald T Cash, Jr

Gaetano D DeAngelis

James Aloye

Robert M Moon

Ronald LaFreeda

Ronald J Cash

Ronald C LaFreeda

A curing agent for epoxy resins is prepared by (1) reacting a phenol and an aldehyde in the presence of a basic catalyst to form a first reaction product, (2) reacting the first reaction product with a polyamine or a polyamine-epoxy adduct to form a second reaction product containing unreacted primary amine groups, and (3) reacting the second reaction product with a proton donor compound having a pK value of 11 or less to form the curing agent.

Reaction product of phenol-aldehyde with polyamine(-epoxy adduct) and proton donor

Polyamines and coating compositions with enhanced resistance to yellowing

A self-dispersing curable epoxy composition is prepared upon contacting an epoxy resin with a polyoxyalkylenemonoamine having a molecular weight of from about 3,000 to about 15,000 in a ratio of about 0.001 to 0.060 reactive equivalents of polyoxyalkylenemonoamine to about 1.0 reactive equivalents of epoxy resin. The self-dispersing curable epoxy resin forms an aqueous dispersion upon mixing with water. When cured, the dispersion is useful as a coating composition.

Self-dispersing curable epoxy resins, dispersions made therewith, and coating compositions made therefrom

A self-dispersing curable epoxy composition is prepared upon contacting an epoxy resin with a polyoxyalkyleneamine having a molecular weight of from about 3,000 to about 15,000 in a ratio of about 0.001 to 0.060 reactive equivalents of polyoxyalkyleneamine to about 1.0 reactive equivalents of epoxy resin. The self-dispersing curable epoxy resin forms an aqueous dispersion upon mixing with water. When cured, the dispersion is useful as a coating composition.

It has been found that non-blushing coatings of high gloss, long pot life and fast cure time may be obtained by using an epoxy curing agent which comprises an epichlorohydrin-metaxylylenediamine reaction product selected from the group consisting of N,N'-bis(3-aminomethylbenzyl)-2-hydroxytrimethylenediamine, the higher oligomers of N,N'-bis(3-aminomethylbenzyl)-2-hydroxytrimethylenediamine and mixtures thereof and a melting point depressant such as a benzyl alcohol or water and an alcohol solvent and, optionally, a tertiary amine such as N,N'-bis(3-(dimethylamino)propyl)-urea.

Epoxy curing agent comprising a metaxylylenediamine-epichlorohydrin

A self-dispersing curable epoxy composition is prepared upon contacting (a) 1.0 reactive equivalents of an epoxy resin, (b) from about 0.01 to 1.0 reactive equivalents of a polyhydric phenol, and (c) between 0.005 and 0.025 reactive equivalents of an amine-epoxy adduct, wherein the amine-epoxy adduct is formed upon contacting 1.0 equivalents of an aliphatic polyepoxide and between 0.3 and 0.9 reactive equivalents of a polyoxyalkyleneamine. The self-dispersing curable epoxy resin forms an aqueous dispersion upon mixing with water. When cured, the dispersion is useful as a coating composition.

Self-dispersing curable epoxy resins, dispersions made therewith, and

A self-dispersing curable epoxy composition is prepared upon contacting (a) 1.0 reactive equivalents of an epoxy resin, (b) between 0.005 and 0.5 reactive equivalents of an amine-epoxy adduct, and optionally (c) from about 0.01 to 1.0 reactive equivalents of a polyhydric phenol, wherein the amine-epoxy adduct is formed upon contacting 1.0 equivalents of an aliphatic polyepoxide and greater than 1.0 but no more than about 2.5 reactive equivalents of a polyoxyalkyleneamine. The self-dispersing curable epoxy resin forms an aqueous dispersion upon mixing with water. When cured, the dispersion is useful as a coating composition.

A self-dispersing curable epoxy composition is prepared upon contacting (a) 1.0 reactive equivalents of an epoxy resin, (b) from about 0.65 to 0.95 reactive equivalents of a polyhydric phenol, and (c) between 0.005 and 0.5 reactive equivalents of an amine-epoxy adduct, wherein the amine-epoxy adduct is formed upon contacting 1.0 equivalents of an aliphatic polyepoxide and between 0.3 and 0.9 reactive equivalents of a polyoxyalkyleneamine. The self-dispersing curable epoxy resin forms an aqueous dispersion upon mixing with water. When cured, the dispersion is useful as a coating composition.

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Lansdale, PA, United States of America

Joseph L Mulvey