Abstract: Precisely shaped abrasive composites are disclosed. The abrasive composites comprise from 20 to 75 percent by weight at a plurality of abrasive grits and a binder.

Abstract: Precisely shaped composites and methods for making these composites are disclosed. The method of this invention comprises the steps of:(a) providing a production tool having a plurality of cavities;(b) providing a dispensing means capable of introducing a binder precursor comprising a thermosetting resin into the cavities;(c) providing a means, within a curing zone, for at least partially curing the binder precursor;(d) introducing the binder precursor into at least a portion of at least two of the cavities;(e) continuously moving the production tool through the curing zone to at least partially cure the binder precursor to provide a solidified, handleable binder;(f) removing the binder from said at least one cavity; and(g) converting the binder into precisely shaped composites.Steps (f) and (g) can be conducted simultaneously. The composites are bonded to a backing to form a coated abrasive article.

Abstract: Coated polymeric sheet comprising polymer substrate a cross-linked polymer, wherein the coating is characterized by:A. being smooth, having a surface roughness not greater than 0.05 nanometers R.sub.a, except that;B. in the otherwise smooth surface, a multiplicity of depressions having depth ranging from 1 to 90% of the thickness of the coating.Backside coatings (containing carbon black in the cross-linked polymer) for magnetic recording tapes benefit from this invention by improved winding characteristics. The concept described is a replacement for rough random surface texture, formerly used in backside coatings, with a controlled surface texture. The process disclosed can also be used to make alphanumeric symbols on the pigment binder coating.

Abstract: Precisely shaped composites and methods for making these composites are disclosed. The method of this invention comprises the steps of:(a) providing a production tool comprising a plurality of cavities;(b) providing a dispensing means capable of introducing a binder precursor comprising a thermosetting resin into the cavities;(c) providing a means, for at least partially curing the binder precursor;(d) introducing said binder precursor into at least a portion of at least two of the cavities;(e) continuously moving the production tool through a curing zone to at least partially cure the binder precursor;(f) removing the solidified binder from the production tool; and(g) converting the solidified binderinto precisely shaped composites. Steps (f) and (g) can be conducted simultaneously. The composites can be bonded together to form a shaped mass, e.g.

Abstract: Coated polymeric sheet comprising polymer substrate a cross-linked polymer, wherein the coating is characterized by:A. As being smooth, having a surface roughness not greater than 0.05 nanometers R.sub.a, except that;B. in the otherwise smooth surface, a multiplicity of depressions having depth ranging from 1 to 90% of the thickness of the coating.Backside coatings (containing carbon black in the cross-linked polymer) for magnetic recording tapes benefit from this invention by improved winding characteristics. The concept described is a replacement for rough random surface texture, formerly used in backside coatings, with a controlled surface texture. The process disclosed can also be used to make alphanumeric symbols on the pigment binder coating.

Abstract: A coated abrasive article comprising:(a) a backing;(b) at least one layer comprising a plurality of precisely shaped abrasive particles that comprise abrasive grits and a free-radically polymerized binder, wherein said precisely shaped particles have vertexes and(c) a bonding medium which serves to adhere said precisely shaped particles to said backing;wherein the precisely shaped particles are randomly disposed on the backing such that at least a portion of said particles are oriented with said vertexes pointing toward said backing.

Abstract: Abrasive articles comprising precisely shaped particles are disclosed. The particles are bonded together to form a shaped mass, e.g., a wheel; alternatively, the particles can be bonded to a backing to form a coated abrasive article; or the particles can be bonded into a fibrous, nonwoven substrate to form a non-woven abrasive article.

Abstract: A reclosable mechanical fastener comprising a fastening component having a surface structure by which two such fastening components can become releasably attached. The novel fastening component is a composite of a tough substrate and a fastening layer that forms said surface structure, which fastening layer is formed from a cured oligomeric resin composition having one or more like or different hard segments, one or more like or different soft segments, and one or more like or different monovalent moieties containing a radiation-sensitive, addition-polymerizable, function group. The novel fastener forms stronger linkages than were possible with similar fasteners of the prior art.

Abstract: A coated abrasive article comprising a backing bearing on at least one major surface thereof abrasive composites comprising a plurality of abrasive grains dispersed in a binder. The binder serves as a medium for dispersing abrasive grains, and it may also bond the abrasive composites to the backing. The abrasive composites have a predetermined shape, e.g., pyramidal. The dimensions of a given shape can be made substantially uniform. Furthermore, the composites are disposed in a predetermined array. The predetermined array can exhibit some degree of repetitiveness. The repeating pattern of a predetermined array can be in linear form or in the form of a matrix.

Abstract: A reclosable mechanical fastener comprising a fastening component having a surface structure by which two such fastening components can become releasably attached. The novel fastening component is a composite of a tough substrate and a fastening layer that forms said surface structure, which fastening layer is formed from a cured oligomeric resin composition having one or more like or different hard segments, one or more like or different soft segments, and one or more like or different monovalent moieties containing a radiation-sensitive, addition-polymerizable, function group. The novel fastener forms stronger linkages than were possible with similar fasteners of the prior art.

Abstract: A coated abrasive article comprising a backing bearing on at least one major surface thereof abrasive composites comprising a plurality of abrasive grains dispersed in a binder. The binder serves as a medium for dispersing abrasive grains, and it may also bond the abrasive composites to the backing. The abrasive composites have a predetermined shape, e.g., pyramidal. The dimensions of a given shape can be made substantially uniform. Furthermore, the composites are disposed in a predetermined array. The predetermined array can exhibit some degree of repetitiveness. The repeating pattern of a predetermined array can be in linear form or in the form of a matrix.