US Patent 7473713 Additives for water-resistant gypsum products

Patent 7473713 was granted and assigned to Hexion on January, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Hexion

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7473713

Patent Inventor Names

Steven Wantling0

Bonnie S. Zepka0

Date of Patent

January 6, 2009

Patent Application Number

10525917

Date Filed

June 5, 2003

Patent Primary Examiner

‌

Daniel S. Metzmaier

Patent abstract

Emulsions are provided which are useful in imparting water-resistance to gypsum products. In one embodiment, the emulsions comprise at least one wax, an alkyl phenol, a salt of polynaphthalenesulfonic acid, and a complexed starch. Emulsions of this embodiment may be added to hot, even boiling, water without the emulsion separating or curdling. The emulsions of the present invention are stable for extended periods of time when stored at room temperature and do not require the addition of a bactericide. The emulsions of the present invention are pourable liquids at room temperature.