Patent ID: 8028803
Filing Date: 2011-10-04
Classification: C04B,E04B

Abstract:
1. A method of making a foamed acoustical product comprising: blending a starch with cold water; heating the starch/water blend to form a starch gel; adding mineral wool to the starch gel to form a pulp; wet mixing the pulp until wool nodules are formed; combining a surfactant with an amount of foam water, said surfactant being selected from the group consisting of a linear alkylbenzene sulfonate, a cocamidopropyl betaine, a cocamidopropyl hydroxysultaine, their salts and mixtures thereof; mixing the surfactant, foam water and pulp to form a foamed pulp; casting the foamed pulp into a mold; allowing the foamed pulp to dry forming a foamed product; removing the foamed product from the mold.