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AssigneeMinnesota Mining and Manufacturing Company
InventorsThomas P. Klun, Louis D. Hibbard, Kathryn M. Spurgeon, Scott R. Culler
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Coatable compositions suitable for use in producing abrasive articles are presented. The inventive coatable compositions comprise a free radically polymerizable composition, abrasive particles, and a photoinitiator system. The photoinitiator system consists essentially of a compound which cleaves via .alpha.-cleavage and has a molar absorptivity in dilute methanol solution ranging from about 4 to about 400 liter/mole-cm in at least some portion of the UV/visible spectrum ranging from about 395 and about 500 nanometers. Abrasive articles incorporating cured versions of the compositions are presented, as well as methods of making and using the articles.
An abrasive article comprising a plurality of abrasive particles adhered together by a binder comprising a photoinitiated free radically polymerizable resin initiated by at least one photoinitiator cleavable via or .alpha.-cleavage and having a molecular absorptivity in a dilute methanol solution ranging from about 4 to about 400 liter/mole-cm in at least one portion of the UV/visible spectrum ranging from about 395 to about 500 nanometers.
A nonwoven abrasive article comprising an open, lofty, three-dimensional network of fibers bound together at points when they contact with a binder comprising a photoinitiated free radically polymerized resin initiated by at least one photoinitiator cleavable via .alpha.-cleavage and having a molar absorptivity in dilute methanol solution ranging from about 4 to about 400 liter/mole-cm in at least some portion of the UV/visible spectrum ranging from about 395 nanometers to about 500 nanometers.
The abrasive article of claim 23 wherein the .alpha.-amino acetophenone is 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butan-1-one.
An improved abrasive article including a plurality of non-white abrasive particles adhered together by a free radically polymerizable resin binder, wherein the improvement comprises the free radically polymerizable resin binder initiated by at least one photoinitiator cleavable via .alpha.-cleavage and having a molar absorptivity in dilute methanol solution ranging from about 4 to about 400 liter/mole-cm in at least some portion of the UV/visible spectrum ranging from about 395 to about 500 nanometers.
An improved nonwoven abrasive article including an open, lofty, three-dimensional network of fibers bound together at points where they contact a free radically polymerizable resin binder and a plurality of non-white abrasive particles bound to at least some of the fibers by a second binder, wherein the improvement comprises either the first, second, or both binders comprising a free radically polymerizable resin binder initiated by at least one photoinitiator cleavable via .alpha.-cleavage and having a molar absorptivity in dilute methanol solution ranging from about 4 to about 400 liter/mole-cm in at least some portion of the UV/visible spectrum ranging from about 395 to about 500 nanometers.
Dependencies are inferred from the claim text.