Protective barrier coating for styrofoam using an unsaturated thermosettable resin composition

Abstract

A coating for polystyrene foam products is set forth. The coating has the preferred form of a first latex layer of copolymer of butadiene with either styrene or vinylidene chloride or both mixed with a fine aggregate such as silica flour or fly ash and a top layer made of one or more strata of a thermosetting resin. This resin is a thermosetting mixture of ethylenically unsaturated monomers and/or one or more of: 1. unsaturated polyester or polyesteramide resins, 2. norbornyl modified unsaturated polyester or polyesteramide resins, 3. hydrocarbon modified unsaturated polyester or polyesteramide resins, 4. vinyl ester resins, or 5. mixtures of the foregoing resins. The resin is mixed with an aggregate of particle size ranging from about 10 microns to larger as required and having a color pigment therein as required. The latex and resin with aggregate is applied over the polystyrene article to form a and protected composite structure.

Dependencies are inferred from the claim text.