Rohm and Haas Company

Morton International, Inc.

Jacquelyn M Schlessman

Jeno Muthiah

Carryll A Seelig

William George Ruth

Jeremiah J Teti

A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from about 200 to about 2000 centipoise at 150&#xb0; C. and a low temperature curing agent capable of maintaining its own domain during extrusion which is extruded as one component at a temperature below 220&#xb0; F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300&#xb0; F. and produces a coating having an exceptionally smooth surface with either a low or high gloss. The powder is particularly useful for coating heat sensitive substrates such as plastics, paper, cardboard and wood.

Coating powder of epoxy resin and low temperature curing agent

A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from out 200 to about 3000 centipoise at 150&deg; C. and a low temperature curing agent is extruded or otherwise mixed in the molten state as one component at a temperature below 230&deg; F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300&deg; F. and produces a coating having an exceptionally smooth surface with either a low or high gloss. The powder is particulary useful for coating heat sensitive substrates such as plastic parts for automobiles, paper, cardboard and wood. Fiberboard having a pattern such as a simulated wood grain printed on its surface and a powder coating of this invention over said pattern has the appearance of natural wood.

One-component, low temperature curable coating powder

A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from about 200 to about 2000 centipoise at 150&deg; C. and a low temperature curing agent is extruded as one component at a temperature below 220&deg; F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300&deg; F. and produces a coating having a smooth surface with either a low or high gloss. The powder is particulary useful for coating heat-sensitive substrates such as plastics, paper, cardboard and wood.

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Temple, PA, United States of America

Jacquelyn M Schlessman