초록 ▼

A method for the production of expanded polymeric materials; in particular for producing thermally insulating materials used in refrigerators. The method comprising the steps of providing a mixture of reagents based on isocyanate and polyol with the addition of expandable polystyrene-based microsphe

A method for the production of expanded polymeric materials; in particular for producing thermally insulating materials used in refrigerators. The method comprising the steps of providing a mixture of reagents based on isocyanate and polyol with the addition of expandable polystyrene-based microspheres, in which method the ratio by weight between the reagents and the expandable microspheres is between, about 7:1 and about 1:2.

대표청구항 ▼

The invention claimed is: 1. A method for producing expanded polymeric foam in a cavity of a structure, comprising:mixing expandable polystyrene-based microspheres with at least one of a polyol and an isocyanate to form a slurry of wetted microspheres;simultaneously introducing the slurry, isocyanat

The invention claimed is: 1. A method for producing expanded polymeric foam in a cavity of a structure, comprising:mixing expandable polystyrene-based microspheres with at least one of a polyol and an isocyanate to form a slurry of wetted microspheres;simultaneously introducing the slurry, isocyanate, and polyol into the cavity to form a final mixture;controlling the polymerisation temperature of the final mixture to yield a foam having an expanded bead size of 3-6 mm and a density of less than 38 kg/m3;wherein the isocyanate and polyol form the reagents and the ratio by weight between the reagents and the expandable microspheres of the final mixture is between about 7:1 and about 1:2.