Study of fillers added into polyurethane resins and their effects on properties in working conditions [CD-ROM] - Altafim, Ruy Alberto Corrêa; Murakami, Cacilda Ribeiro; Claro Neto, Salvador; Araújo, Luís Carlos Ribeiro de; Chierice, Gilberto Orivaldo (Congresso Brasileiro de Engenharia e Ciência dos Materiais, 2000)