METHOD OF PREPARING ACOUSTIC MINERAL PLATES Russian patent published in 1995 - IPC

FIELD: building materials. SUBSTANCE: method involves granulation of mineral fiber, binder preparing, mixing mineral wool with binder, hydromass placement on the form-bases with antiadhesion coating applied on their, plate forming on the form-bases, their drying, mechanical working and finishing ready plates. Aqueous suspension of fluoroplastic Ф-4Д, bichromate and phosphoric acid taken at the ratio 70-90.5 15.4-15 is applied on the form-bases. Coating is dried at 20-90 C for 2.0-0.5 h and caked at 360 ± 10^°C for 5-15 min. Antiadhesion coating is applied by 2-3 layers and every layer is dried and caked separately. EFFECT: improved method of plate preparing. 2 cl, 1 tbl