An abrasive element comprising a substrate having on a surface thereof particles of an abrasive material secured by a non-metallic binding medium wherein at least the surface of the element between the particles of abrasive material contains a fluorochemical selected from the group consisting of compounds comprising a fluorinated aliphatic group attached to a polar group or moiety and fluoropolymers having a molecular weight of at least 750 and comprising a non-fluorinated polymeric backbone having a plurality of pendant fluorinated aliphatic groups, said aliphatic groups comprising the higher of
(a) a minimum of three C-F bonds, or
(b) in which 25% of the C-H bonds have been replaced by C-F bonds such that the fluorochemical comprises at least 15% by weight of fluorine. The fluorochemical may be applied as a layer coated over the existing layers of an abrasive element or it may be incorporated into at least the coating formulation which will form the outermost layer of the binding medium. The abrasive elements may be in the form of sheets, blocks, discs, pads, belts etc. The presence of the fluorochemical serves to reduce the loading of the abrading surface in use, thereby extending the working life of the abrasive element.
一种研磨元件,包括基底,基底表面有由非
金属结合介质固定的研磨材料颗粒,其中在研磨材料颗粒之间的元件表面至少含有一种
氟化合物,该
氟化合物选自以下几组化合物:由连接到极性基团或分子上的含
氟脂肪族基团组成的化合物,以及分子量至少为 750 的含
氟聚合物,该聚合物由具有多个悬垂含
氟脂肪族基团的非含
氟聚合物骨架组成,所述脂肪族基团包括以下较高者
(a) 至少三个 C-F 键,或
(b) 其中 25% 的 C-H 键已被 C-F 键取代,因此按重量计,
氟化合物中至少含有 15% 的
氟。含
氟化学品可以是涂覆在现有研磨元件层上的一层,也可以至少与涂层配方结合在一起,形成结合介质的最外层。研磨元件可以是片状、块状、盘状、垫状、带状等。
氟化合物的存在可减少使用中研磨表面的负荷,从而延长研磨元件的工作寿命。