Abrasive elements
First Claim
1. An abrasive element of the type including a substrate and a plurality of abrasive particles attached thereto by an organic binding medium, the abrasive element comprising a fluorochemical compound either admixed with the organic binding medium, attached to an exposed surface of the organic binding medium, or both, the fluorochemical compound selected from the group consisting of compounds comprising a fluorinated aliphatic group attached to a polar group or moiety and compounds having a molecular weight of at least about 750 and comprising a non-fluorinated polymeric backbone having a plurality of pendant fluorinated aliphatic groups comprising the higher of(a) a minimum of three C--F bonds, or(b) in which 25% of the C--H bonds have been replaced by C--F bonds such that the fluorochemical compound comprises at least 15% by weight of fluorine.
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Accused Products
Abstract
An abrasive element comprising a substrate having on a surface thereof particles of an abrasive material secured by an organic 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 compounds 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(b) in which 25% of the C--H bonds have been replaced by C--F bonds such that the compound comprises at least 15% by weight of fluorine.
The compound 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 compound serves to reduce the loading of the abrading surface in use, thereby extending the working life of the abrasive element.
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Citations
25 Claims
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1. An abrasive element of the type including a substrate and a plurality of abrasive particles attached thereto by an organic binding medium, the abrasive element comprising a fluorochemical compound either admixed with the organic binding medium, attached to an exposed surface of the organic binding medium, or both, the fluorochemical compound selected from the group consisting of compounds comprising a fluorinated aliphatic group attached to a polar group or moiety and compounds having a molecular weight of at least about 750 and comprising a non-fluorinated polymeric backbone having a plurality of pendant fluorinated 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 compound comprises at least 15% by weight of fluorine.
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21. A method of preparing an abrasive element having a reduced propensity to loading, the abrasive element of the type including a substrate and a plurality of abrasive particles attached to the substrate by an organic binding medium, the method comprising admixing a fluorochemical compound the organic binding medium, wherein the fluorochemical compound is selected from the group consisting of compounds comprising a fluorinated aliphatic group attached to a polar group or moiety and compounds having a molecular weight of at least about 750 and comprising a non-fluorinated polymeric backbone having a plurality of pendant fluorinated 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 compound comprises at least 15% by weight of fluorine.
- 24. A method of preparing a abrasive element having a reduced propensity to loading, the abrasive element of the type including a substrate and a plurality of abrasive particles attached to the substrate by an organic binding medium, wherein the method comprises applying a fluorochemical compound to the element in an aqueous dispersion or emulsion.
Specification