Milliken + Co

Ricky Lee Ritz

Richard Allan VanDahm

This invention relates to alkoxylated Bisphenol A compositions containing low residual amounts of Bisphenol A. The present invention also relates to methods for making such alkoxylated compositions containing low residual amounts of Bisphenol A, as well as uses for such compositions. The alkoxylated compositions containing low residual amounts of Bisphenol A may be utilized in packaging applications (such as indirect and/or direct food contact packaging), printing inks, container linings, and the like.

Low residual bisphenol A alkoxylated materials, their preparation and use thereof

Purified bisphenol A ethoxylates are provided which are produced through the base-catalyzed addition of ethylene oxide to a bisphenol A. The purification step involves the neutralization with a mineral acid (namely phosphoric acid) and subsequent treatment with a colloidal metal silicate. The neutralization step removes substantially all of the excess cation (or salt) of the base catalyst to produce a uniformly low salt content bisphenol A ethoxylate. Such a low-salt product is thus easy to produce in continuously high yields. The process itself is also encompassed within this invention.

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Inman, SC, United States of America

Ricky Lee Ritz