Composition for producing self-supporting stiff expanded materials

Abstract

The invention relates to a composition for the production of stiff and self-supporting expanded materials, the composition being based on an unsaturated polyester resin, an isocyanate and a filler, preferably an inert silicate material, with or without other fillers such as cork and ash, said composition having improved expandibility features and being especially useful for the production of stiff, expanded, and noncrumbling materials. These materials are especially useful for self-supporting structures such as doors and wall partitions.

Dependencies are inferred from the claim text.