Abstract: Coated abrasives are described comprising a backing substrate having coated thereon a moisture-cured polyurethane hot melt make coating and abrasive particles at least partially embedded therein. Methods of making the inventive coated abrasives are also presented.
Type:
Grant
Filed:
August 10, 1994
Date of Patent:
January 21, 1997
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Roy Stubbs, Michael J. Hughes, James F. Morris-Adams
Abstract: Seated abrasive articles containing particles having specified shapes. The coated abrasive comprises:a. a backing;b. at least one binder;c. an abrasive coating comprising shaped abrasive particles and diluent particles said at least one binder serving to bond the abrasive coating to the backing. The diluent particles can comprise (1) a plurality of individual abrasive particles bonded together by an adhesive to form an agglomerate, (2) a plurality of individual non-abrasive particles bonded together by an adhesive to form an agglomerate, (3) a plurality of individual abrasive particles and a plurality of individual non-abrasive particles bonded together by an adhesive to form an agglomerate, (4) individual non-abrasive particles, (5) individual abrasive particles, or (6) combinations of the foregoing.
Type:
Grant
Filed:
June 21, 1995
Date of Patent:
December 17, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: The present invention provides a backing for a coated abrasive article, wherein the backing includes a tough, heat resistant, thermoplastic binder material, and an effective amount of a fibrous reinforcing material distributed throughout the thermoplastic binder material. The tough, heat resistant, thermoplastic binder material and the fibrous reinforcing material together form a hardened composition that will not substantially deform or disintegrate during use.
Type:
Grant
Filed:
September 26, 1994
Date of Patent:
December 3, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
George M. Stout, James G. Homan, John R. Mlinar, Larry R. Wright
Abstract: Abrasive articles made using a coatable, addition polymerizable binder precursor composition are described, as well as methods of making same. The compositions comprise a reactive diluent compound and preferably an addition polymerizable resin, the reactive diluent being an organic compound selected to be especially effective in solubilizing aminoplast resins.
Type:
Grant
Filed:
September 1, 1995
Date of Patent:
December 3, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Eric G. Larson, Ernest L. Thurber, Alan R. Kirk, Gregg D. Dahlke, Elizabeth C. Edblom, Don H. Kincaid
Abstract: Coated abrasive article comprising a backing bearing on at least one major surface thereof erodible agglomerates and abrasive grains, wherein the erodible agglomerates consist essentially of a grinding aid and the erodible agglomerates are in the form of rods. The erodible agglomerates can be between or above or between and above the abrasive grains. The coated abrasive article of this invention utilizes a higher level of grinding aid than coated abrasive articles of the prior art.
Type:
Grant
Filed:
December 6, 1995
Date of Patent:
November 26, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
John J. Gagliardi, Jason A. Chesley, Charles H. Houck, Richard J. Cosmano, Ernest J. Duwell
Abstract: A method of making a composite abrasive filament, said filament including at least one preformed core at least partially coated with a hardened, abrasive-filled thermoplastic elastomer, and exhibiting increased abrading life over previously known abrasive filaments. Also disclosed are methods of using such filaments in article form to abrade a variety of workpieces.
Type:
Grant
Filed:
June 1, 1995
Date of Patent:
November 5, 1996
Assignee:
Minnesota Mining And Manufacturing Company
Inventors:
Loren L. Barber, Jr., Dennis G. Welygan, Richard M. Pihl
Abstract: Abrasive articles comprising a plurality of abrasive particles, a combination of potassium tetrafluoroborate and a halogenated polymer, and a binder to which the plurality of abrasive particles are adhered, and methods of making and using the abrasive articles.
Type:
Grant
Filed:
February 10, 1995
Date of Patent:
October 8, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
John J. Gagliardi, Jason A. Chesley, Charles H. Houck, Walter L. Harmer, Gary L. Olson
Abstract: A coated abrasive product having a coating comprising a composition formed from an epoxy resin that is capable of being coated from water, a curing agent, and a grinding aid dispersed in the epoxy resin. It is preferred that the coat containing the epoxy resin and the grinding aid be the outermost coat of the coated abrasive product, e.g. the size coat or supersize coat, in order to position the grinding aid in direct contact with the workpiece being abraded.
Type:
Grant
Filed:
August 16, 1995
Date of Patent:
September 17, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: In accordance with the present invention, a method of polishing stone and an article for use in the method are presented in which the stone has at least one exposed surface, the method comprising the steps of:a) bringing into frictional contact an abrasive article to the exposed surface of the stone; andb) refining the exposed surface of the stone with the abrasive article, preferably in the presence of water, wherein the abrasive article comprises a plurality of abrasive particles adhered to a backing (preferably a flexible backing) by a binder (preferably a resilient binder), wherein the binder comprises a cured resin derived from a resin comprising unsaturated addition polymerizable units. The binder and abrasive particles (and plasticizer when used) form a resilient composite having a hardness no greater than 20 HK but at least 1 HK. Use of the articles and method of the invention efficiently increases the gloss of stone surfaces.
Type:
Grant
Filed:
May 15, 1995
Date of Patent:
September 3, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: An abrasive article and methods for making such abrasive articles, including coated and nonwoven abrasive articles, comprising (a) a plurality of abrasive particles and (b) a bond system which adheres the plurality of abrasive particles together, the bond system comprising a binder; the binder being formed from a binder precursor essentially free of organic solvent, the binder precursor comprising a blend of an urea-aldehyde resin and a water dilutable resole phenolic resin, the blend being catalyzed by an acid catalyst system and, in particular, a coated abrasive comprising (a) a backing having a major surface, (b) a plurality of abrasive particles, and (c) a bond system which adheres the plurality of abrasive particles to the major surface of the backing, the bond system comprising a binder; the binder being formed from a binder precursor comprising a blend of an urea-aldehyde resin and a water dilutable resole phenolic resin, the blend being catalyzed by an acid catalyst, wherein the blend comprises from a
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
September 3, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Robbyn L. Engen, Douglas S. Spencer, Jeffrey E. Ford
Abstract: Abrasive articles are described that include a plurality of abrasive particles, a plurality of coated grinding aid particles, the coated grinding aid particles comprising grinding aid particles coated with an inert, hydrophobic, hydrocarbon-containing substance, and a binder in which the abrasive particles and the coated grinding aid particles are dispersed.
Abstract: The invention provides a waterborne coating composition comprising an emulsion having a continuous aqueous phase and a dispersed organic phase comprising a solution of water-reducible, film-forming, air-drying maleinized polybutadiene polymer in a water-immiscible hydrocarbon solvent; and a method of making the waterborne coating composition which comprises dissolving the maleinized polybutadiene in the solvent to form a solution, and emulsifying the solution in water with nonionic surfactant to form an oil-in-water emulsion.
Type:
Grant
Filed:
September 2, 1994
Date of Patent:
September 3, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Grinding aid particles coated with an inert, hydrophobic, hydrocarbon-containing substance such as fatty acids, fatty acid salts, and oils, and erodible agglomerates comprising a plurality of the coated grinding aid particles are disclosed.
Type:
Grant
Filed:
November 17, 1995
Date of Patent:
September 3, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A coated abrasive article having a coating comprising a composition formed from an epoxy resin that is capable of being coated from water, a curing agent, and optionally a grinding aid dispersed in the epoxy resin. It is preferred that the coat containing the epoxy resin and the grinding aid be the outermost coat of the coated abrasive article, e.g. the size coat or supersize coat, in order to position the grinding aid in direct contact with the workpiece being abraded.
Type:
Grant
Filed:
August 16, 1995
Date of Patent:
August 27, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Organic compounds having at least one ethylenically-unsaturated group are described, the organic compounds being suitable for use in coatable compositions as reactive diluents; compounds of the invention preferably have a divalent organic linking moiety devoid of reactive groups other than optional ethylenically-unsaturated groups, and a polar organic moiety and are particularly adept in solubilizing aminoplast resins having radiation-curable pendant groups.
Type:
Grant
Filed:
November 4, 1994
Date of Patent:
June 4, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Ernest L. Thurber, Eric G. Larson, Alan R. Kirk, Gregg D. Dahlke
Abstract: A coated abrasive product having a backing bearing abrasive grains on one major surface thereof and a pressure-sensitive adhesive, coatable from water, on the other major surface thereof. The pressure-sensitive adhesive can be used to secure the coated abrasive to a support pad or back-up pad. The support pad provides the coated abrasive with the necessary foundation during abrading operations. The pressure-sensitive adhesives of this invention can adequately secure the coated abrasive to the support pad even at high rotation speeds and at high grinding pressures. Previously known pressure-sensitive adhesives for coated abrasives that are coatable from water were unable to provide this property.
Type:
Grant
Filed:
June 6, 1995
Date of Patent:
May 28, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Donna W. Bange, Jens L. Jorgensen, Richard V. Kopel, Stephen J. Yoos
Abstract: Abrasive articles and methods of making and using same are presented, the abrasive articles having a peripheral surface adapted to contact and abrade a workpiece. The abrasive articles comprise abrasives particles and a grinding aid composition positioned at an effective location in reference to the abrasive particles, the grinding aid composition comprising:a) a cured grinding aid binder comprising a blend of a thermoplastic resin and a thermoset resin, the thermoplastic resin and thermoset resin being present at an effective weight ratio; andb) an effective amount of a grinding aid dispersed in the grinding aid binder.
Type:
Grant
Filed:
May 15, 1995
Date of Patent:
May 28, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: An abrasive composite is presented having a controller rate of erosion, the composite comprising abrasive particles dispersed in the binder, wherein the binder comprises an addition polymerized resin having clay particles dispersed therein. The abrasive composite may be adhered to various substrates, including paper, cloth, polymeric films, and nonwovens. The clay particles allow the binder, and thus the composite, to controllably erode upon abrasion of a workpiece, thus exposing fresh abrasive particles to the workpiece. Coatable compositions comprising clay particles dispersed in a binder precursor composition, and optionally containing abrasive particles, are also described, as well as methods of making and using the composites and articles.
Type:
Grant
Filed:
June 1, 1994
Date of Patent:
May 21, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A composite abrasive filament, including at least one preformed core at least partially coated with a hardened, abrasive-filled thermoplastic elastomer, exhibits increased abrading life over previously known abrasive filaments. Also disclosed are methods of making such filaments and using such filaments in article form to abrade a variety of workpieces.
Type:
Grant
Filed:
June 1, 1995
Date of Patent:
May 21, 1996
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Loren L. Barber, Jr., Dennis G. Welygan, Richard M. Pihl