MATERIAL AMORTECEDOR DE SOM MATERIAL FLEXIVEL DE BARREIRA PROCESSO PARA PRODUZIR COMPOSICAO DE ELASTOMERO DE POLIURETANO COM LIGACOES CRUZADAS

摘要

A sound deadening material is obtained with a very high loading of sound damping materials such as barium sulfate, calcium carbonate or metal powders. These materials are mixed with water and are bound together by adding a water-miscible isocyanate-terminated prepolymer which reacts with the water to form a cross-linked binder.