Abstract: Coated abrasive articles have a composite tie layer. The composite tie layer is preparable by disposing a first polymerizable composition comprising a polyfunctional aziridine on a backing, and disposing a second polymerizable composition comprising at least one acidic free-radically polymerizable monomer and at least one oligomer having at least two pendant free-radically polymerizable groups on the first polymerizable composition, at least partially polymerizing the first and second polymerizable compositions, wherein homopolymerization of the oligomer results in a polymer having a glass transition temperature of less than 50 degrees Celsius.

Abstract: Coated abrasive articles have a tie layer that is preparable by at least partially polymerizing an isotropic polymerizable composition comprising a polyfunctional aziridine, an acidic free-radically polymerizable monomer, and an oligomer having at least two pendant free-radically polymerizable groups, wherein homopolymerization of the oligomer results in a polymer having a glass transition temperature of less than 50 degrees Celsius.

Abstract: An abrasive article and methods of making the same are disclosed. The abrasive article includes a backing and an array of features on the backing. Each feature includes a base and a body. The body includes a face having an undercut. In one embodiment, the feature also includes a planar top portion having abrasive particles disposed thereon. In another embodiment, the feature also includes a radiused portion on the undercut sidewall adjacent the base.