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US 2014/0272381 A1Published application
Polystyrene foam products with improved adhesion and water resistance, and methods of making the same
AssigneeUnited States Gypsum Company
InventorsAshish Dubey, Yanfei Peng
Life of this patent
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Abstract
A water-resistant preformed polystyrene foam product with improved adhesive properties is provided. A water-resistant coating for preformed polystyrene products is also provided. The coating can be formulated as a sprayable composition and is easy to apply. Methods for making the coating formulations and water-resistant preformed polystyrene products are also provided.
Claims20
A preformed shower or bathroom component comprising:
- an expanded polystyrene foam body covered with a coating comprising Class C fly ash and a latex polymer,
- wherein said coating renders said component water-resistant;
- and
- wherein said coating improves adhesion of said component to ceramic tiles.
1 more element
A sprayable water-resistant coating for a polystyrene foam product, comprising:
- Class C fly ash, a latex polymer dispersed in water and a set control agent selected from the group consisting of polycarboxylic acid, citric acid, and any suitable salt thereof;
- wherein between 0.10 to 0.75 parts by weight of said set control agent is used for every 100 parts by weight of said fly ash.
Dependencies are inferred from the claim text.