An abrasive article may include an organic bond material, abrasive particles contained within the organic bond material and a plasticizer contained within the organic bond material. The plasticizer may include at least one of an aromatic phenyl group, a heteroaromatic furyl group, or a saturated aliphatic hydrocarbon. The plasticizer may further include a polar group.

A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation, including a placement angle ranging from +90 degrees to −90 degrees and a rake angle ranging from +90 degrees to −90 degrees.

The present disclosure relates generally to coated abrasive articles that include a grinding aid aggregates in a make coat, a size coat, a supersize coat, or combinations thereof, as well as methods of making coated abrasive articles.

A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation, including a placement angle ranging from +90 degrees to −90 degrees and a rake angle ranging from +90 degrees to −90 degrees.

The present disclosure relates generally to coated abrasive articles that include a grinding aid aggregates in a make coat, a size coat, a supersize coat, or combinations thereof, as well as methods of making coated abrasive articles.

A method of making a coated abrasive article includes disposing a precursor make layer on a major surface of the backing, optionally partially curing the precursor make layer to provide a partially cured precursor make layer, disposing abrasive particles; partially embedding abrasive particles in the optionally partially cured precursor make layer; and further curing the optionally partially cured precursor make layer to form a make layer. The precursor make layer comprises components comprising: a) 50 to 97.99 percent by weight of phenol-formaldehyde resin; b) 1 to 49 percent by weight of resorcinol-formaldehyde resin; c) 1 to 49 percent by weight of at least one compound having at least one free-radically polymerizable group; and d) 0.01 to 1 percent by weight of a free-radical initiator. A size layer and/or supersize layer may be disposed over the make layer and abrasive articles. Coated abrasive articles made by the method are also disclosed.

A catalyst for use with a phenolic resins which imparts accelerated curing at reduced temperatures. The catalyst is selected from elemental halogen or opium polyhalide compounds of the general formula:
O.sup.+X.sub.(2n+1).sup.,
where 1n4, Q is onium group, preferably selected from ammonium, sulfonium and phosphonium; and X is a halide. Each X may be the same or different and may include mixed halides such a XBr.sub.2Cl or Cl.sub.2Br.

A phenolic resin composition is described comprising at least 50 wt.-% of phenolic resin; first polymerized units comprising a cationic group; and second polymerized units comprising an anionic group. The cationic groups are ionically bonded to the anionic groups. The ionic bonding of the cationic group and anionic group of the polymerized units can provide certain complex viscosity and/or tan delta properties. In some embodiments, the phenolic resin composition has a complex viscosity at 65C of at least 50 Pascal(seconds) and/or has a tan delta at 65C ranging from 0.5 to 2.5. Abrasive articles and methods of making an abrasive article are also described.

The present disclosure relates generally to coated abrasive articles that include a grinding aid aggregates in a make coat, a size coat, a supersize coat, or combinations thereof, as well as methods of making coated abrasive articles.

The disclosure provides a catalyst for use with a phenolic resins which imparts accelerated curing at reduced temperatures. The catalyst is selected from elemental halogen or onium polyhalide compounds.