| abstract |
The invention relates to the asbestos technical industry, in particular, to the development of a composition for the manufacture of friction articles used in friction units - brake linings, friction liners, in particular for washing machines. The invention allows to obtain a water-resistant material characterized by swelling in automobile engine oil 0, .6 wt.% (Swelling of known material 0.18 May.) A positive effect is achieved due to the additional use in the formulation of the composition of gypsum in the form of phosphogypsum and apatite product - nepheline ores, composition, wt.%: SiO, 23-57, AljOa 1.5-9.0, + 2-9, TiOa, CaO, MnO, MgO, Pr0505-19. The composition contains, wt .: 1,2-polybutadiene rubber 15-21, sulfur 2.9-, 0, 2-mercaptobenzthiazole 0.2-0.6, zinc oxide 2.0-10.2, mineral filler 11 , 9-29,0, gypsum plaster from phosphogypsum 10-18, the product of processing apatite-nepheline ores 6-10 and asbestos - the rest is up to 100. 2 tab. (Oh g |