Rohm and Haas Company

Morton International, Inc.

The Polymer Corporation

Dean A Schreffler

Carryll A Seelig

William George Ruth

Stacy L Greth

Charles M Noonan

Provided are low temperature curing thermosetting epoxy powder coating compositions comprising at least one non-crystalline epoxy resin, at least one crystalline epoxy resin, a curing agent, and a cure catalyst. Coatings made from such powder compositions exhibit a substantial reduction in bubble entrapment, enough to prevent a visible haze from forming in the coating, when cured at low temperatures demanded by brass substrates.

Powder coating with non-crystalline and crystalline epoxy resins and curing agent

Substrate coated with powdered non-crystalline and crystalline epoxy resins

Provided are low temperature curing thermosetting epoxy powder coating compositions comprising at least one non-crystalline epoxy resin, at least one crystalline epoxy resin, a curing agent, and a cure catalyst. Coatings made from such powder compositions exhibit a substantial reduction in bubble entrapment, enough to prevent a visible haze from forming in the coating, when cured at low temperatures demanded by brass substrates, while the powders from which the coatings are made still exhibit good storage stability and melt-processability.

Powder coating of non-crystalline and crystalline epoxy resins

A powder coating composition forming a textured finish comprises epoxy resin, methylene disalicylic acid and an imidazole Bisphenol A epoxy resin.

Textured epoxy powder coating

An epoxy coating powder applied in a fusion coating process that yields a low gloss, wrinkled finish. The coating composition is a heat reactive epoxy resin in which the wrinkled finish results from the use of methylene disalicylic acid as the curing agent for the epoxy resin.

Growing community of inventors

Hamburg, PA, United States of America

Dean A Schreffler