Patents Represented by Attorney Richard Francis

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  • Modified resins and abrasive articles made with the same as a bond system
    Patent number: 4802896
    Abstract: The invention provides a novel resin comprising the reaction product of reactive, curable phenolic resin such as resole phenolic resin with a thermally stable, aromatic ligand such as a phthalocyanine compound and abrasive products which include a bond system comprising a mixture or reaction product of a curable hard resin and thermally stable, aromatic ligand. The preferred abrasive products are coated and three-dimensional, low density abrasive products.
    Type: Grant
    Filed: December 8, 1987
    Date of Patent: February 7, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kam W. Law, Walter W. Goethel
  • Alumina bonded abrasive for cast iron
    Patent number: 4800685
    Abstract: This invention concerns the discovery that sol-gel process alumina abrasive grain provides superior performance in bonded abrasives for grinding cast iron. In a preferred form it is disclosed that bonded abrasives of sol-gel process alumina abrasives in combination with other abrasive grains such as those of silicon carbide and fused alumina also provide superior grinding of cast iron.
    Type: Grant
    Filed: October 30, 1984
    Date of Patent: January 31, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Douglas G. Haynes, Jr.
  • Sheet materials coated with adhesive compositions containing ionene elastomers
    Patent number: 4794031
    Abstract: Ionene elastomers are prepared by reaction of polymeric diamines and certain dihalide linking agents. These elastomers have utility in coating compositions, adhesive compositions, and in the fabrication of elastomeric articles. Certain novel dihalide linking agents are also claimed.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: December 27, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Charles M. Leir, John E. Stark
  • Welding method which provides a weld with corrosion protection
    Patent number: 4788411
    Abstract: A welding method for metal parts includes preparing the surface areas of the parts to be welded to provide bare metal surfaces which are clean and dry, clamping said parts together, coating the bare metal surface with a liquid coating comprised of zinc dust, manganomanganic oxide fume, and organic binder, permitting the coating to dry, and welding the coated surfaces together by gas metal arc welding.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: November 29, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Mark C. Skinner
  • Tackified star block copolymer pressure-sensitive adhesive composition and the sheet materials coated therewith
    Patent number: 4780367
    Abstract: Adhesive compositions comprising tackified star block copolymer having at least 12 block copolymer arms are provided. Sheet materials coated with the adhesive composition are also provided.
    Type: Grant
    Filed: January 10, 1985
    Date of Patent: October 25, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Felix P. Lau, Spencer F. Silver
  • Process for making filamentary structure
    Patent number: 4772347
    Abstract: A method of making a filamentary structure comprising a spiral thermoplastic core filament disposed within a thermoplastic sheath component is provided. The method involves extruding together from an extrusion die filaments forming the core filament and the sheath component, with the core filament being extruded at a faster rate than the sheath component which causes the core filament to spiral, and cooling the extrudates to form a unitary structure. A plurality of the filamentary structures may be extruded side-by-side so that their sheath components are joined together to form a fabric structure.
    Type: Grant
    Filed: October 15, 1986
    Date of Patent: September 20, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Anthony J. Fowler
  • Abrasive grits formed of ceramic containing oxides of aluminum and yttrium, method of making and using the same and products made therewith
    Patent number: 4770671
    Abstract: Ceramic abrasive grits comprising alpha alumina and at least about 0.5 percent by weight yttria are prepared by mixing an aqueous dispersion of alpha alumina monohydrate and yttrium compound, gelling the resultant mixture, drying the gel to produce a dried solid, crushing the dried material to produce grits, calcining the dried grits to substantially remove bound volatile materials, and firing the grits to produce a ceramic material. The yttrium for the most part is in the form of a yttrium aluminum garnet. Abrasive products comprising the abrasive grits are also claimed as is a method of grinding a workpiece with such abrasive products.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: September 13, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Larry D. Monroe, William P. Wood
  • Process for durable sol-gel produced alumina-based ceramics, abrasive grain and abrasive products
    Patent number: 4744802
    Abstract: A sol-gel process of producing durable alpha alumina-based ceramic particularly useful as abrasive grain from alpha alumina monohydrate is improved by the addition of a nucleating agent. Improved abrasive products containing the durable ceramic abrasive grains are also provided.
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: May 17, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Mark G. Schwabel
  • Photolabile blocked surfactants and compositions containing the same
    Patent number: 4740600
    Abstract: Surfactants which are blocked against surfactant action (identified herein as "photolabile blocked surfactants") by a photolabile protective or masking group but which, on exposure to actinic radiation, become unblocked are provided. Coating compositions in which surfactant is formed on irradiation are provided by blending the photolabile blocked surfactant with polymeric film-forming materials.Compositions containing the photolabile blocked surfactants are useful when employed as protective coatings on various substrates or as the adhesive in a pressure sensitive adhesive tape. Although initially well adhering to a substrate, such compositions may be readily removed from the substrate following exposure of the same to suitable radiation which unblocks the surfactant to permit it to regain its surfactant activity.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: April 26, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gilbert L. Eian, John E. Trend
  • Polyalkyloxazoline-reinforced acrylic pressure-sensitive adhesive composition
    Patent number: 4737410
    Abstract: Pressure-sensitive adhesives comprise blends of acrylate copolymer copositions with polyalkyloxazolines. The blends exhibit enhanced cohesive strength with balanced adhesive properties and are useful as coatings for sheet materials.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: April 12, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Steven S. Kantner
  • Method for removing monomer from an acrylate adhesive by reaction with a scavenger monomer
    Patent number: 4737577
    Abstract: An improvement in acrylate polymer pressure sensitive adhesive compositions consists of using a reactive scavenging monomer to remove objectionable residual monomer by copolymerization to form a non-objectionable copolymer.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: April 12, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Francis W. Brown
  • Chip- and abrasion-resistant polyurethane coating composition having improved adhesion
    Patent number: 4735985
    Abstract: The invention is a coating composition which includes fully reacted, solvent-soluble polyurethane, an adhesion-promoting amount of vinyl chloride-vinyl ester copolymer, and a solvent for the polyurethane and the copolymer to make the composition coatable. A method of coating is also provided comprising applying to a surface the coating composition and permitting the coating composition to dry. The invention further provides a surface coated with the dry coating composition.
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: April 5, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Hans T. Oien
  • Adhesive compositions containing ionene elastomers
    Patent number: 4734458
    Abstract: Ionene elastomers are prepared by reaction of polymeric diamines and certain dihalide linking agents. These elastomers have utility in coating compositions, adhesive compositions, and in the fabrication of elastomeric articles. Certain novel dihalide linking agents are also claimed.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: March 29, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Charles M. Leir, John E. Stark
  • Extruded article and method of making the same
    Patent number: 4732770
    Abstract: An article is provided having a plurality of straight spaced parallel extruded elements separated by a regularly undulated extruded element having an aspect ratio of at least about two, with undulations having opposed apexes on either side thereof, with apexes on one side of the undulated element being bonded to one of the parallel extruded elements and the apexes on the other side of the undulated element being bonded to the other of said parallel extruded elements.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: March 22, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Ronald O. Zemke
  • Polysiloxane-grafted copolymer release coating sheets and adhesive tapes
    Patent number: 4728571
    Abstract: Release coating compositions comprising polysiloxane-grafted copolymer and blends thereof with other polymeric materials on sheet materials and the back side of adhesive tapes are provided. Controlled and predictable release is achieved through variation of the number and the length, e.g., the molecular weight, of polysiloxane grafts in the copolymer.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: March 1, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Lawrence M. Clemens, Steven S. Kantner, Mieczyslaw Mazurek
  • Tackified acrylic pressure-sensitive adhesive and composite article
    Patent number: 4726982
    Abstract: A pressure-sensitive adhesive that has high cohesive strength and adheres permanently to high-solids automotive paint systems preferably comprises a mixture of (1) a crosslinked acrylic copolymer of acrylic acid ester and N-vinyl-2-pyrrolidone, and (2) certain tackifier resins. Useful tackifier resins are poly(isobornylmethacrylate), pentaerythritol ester of rosin, and mixed-aliphatic/aromatic polymeric tackifier resins such as a t-butylated styrene. The tackifier resin preferably has a T.sub.g of at least 30.degree. C., M.sub.n from 300 to 3000, and a solubility parameter from 8 to 9. The novel pressure-sensitive adhesive is particularly useful as a dense surface layer of a composite tape having a foamlike core.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: February 23, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William J. Traynor, Cheryl L. Moore, Michael K. Martin, John D. Moon
  • Pressure-sensitive adhesive tape containing hydrophobic silica
    Patent number: 4710536
    Abstract: By incorporating hydrophobic silica into acrylic pressure-sensitive adhesive tape, the shear strength at elevated temperatures is significantly improved, and adhesion and physical properties are maintained or improved. The hydrophobic silica preferably has a surface area from 50 to 400 m.sup.2 /g. A preferred acrylic pressure-sensitive adhesive layer comprises a copolymer of (a) at least one alkyl acrylate having an average of 4-12 carbon atoms in its alkyl group and (b) from 3 to 20% by weight of copolymerizable monomer having a polar group such as acrylic acid.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: December 1, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jurgen Klingen, Patrick G. Zimmerman
  • Mold having ceramic insert
    Patent number: 4704079
    Abstract: A improved mold, apparatus and method for injection molding is provided. The apparatus is of the type which includes a means for opening and closing a multi-part injection molding mold, means for supplying molten material under high pressure into the mold cavity when the mold is closed and means for removing articles molded in the cavity on cooling. The improvement is provided by a new multi-part mold which is made up of at least two parts. Each part of the mold comprises a mold block portion having a ceramic mold cavity insert. The ceramic mold cavity inserts define the walls of the mold cavity when the mold is closed. Each mold cavity insert comprises a shaped ceramic body having a mounting surface adapted to fit under compressive stress throughout the entire molding operation within a mounting cavity of the mold block portion.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: November 3, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Arthur W. Pluim, Jr.
  • Polysiloxane-grafted copolymer pressure sensitive adhesive composition and sheet materials coated therewith
    Patent number: 4693935
    Abstract: This invention provides pressure sensitive adhesive (PSA) compositions comprising a copolymer having a vinyl polymeric backbone having grafted thereto polysiloxane moieties. The compositions may contain other ingredients such as tackifier and/or plasticizer. An exposed surface of the PSA composition is initially positionable on a substrate to which it will be adhered but, once adhered, builds adhesion to form a strong bond. The PSA compositions may be used alone or in blends with unsiliconized PSA compositions. The invention also provides sheet materials coated with the PSA composition such as tape, labels, etc.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: September 15, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Mieczyslaw H. Mazurek
  • Treating composition containing fluorochemical compound mixture and textiles treated therewith
    Patent number: 4681790
    Abstract: The invention provides a treating composition comprising(a) a compound having the formula ##STR1## where R.sub.f is a fluorinated aliphatic radical;A is a divalent radical obtained by eliminating the carbonyl groups of a dibasic organic acid or an organic anhydride selected from the group consisting of tetrachloro phthalic, tetrabromo phthalic and chlorendic; andM is a cation selected from the group consisting of NH.sub.4.sup.+, Na.sup.+, K.sup.+, Li.sup.+, H.sup.+, or a protonated alkyl amine having from 1-6 carbon atoms in the alkyl group;(b) a normally liquid or low melting solid, water soluble or dispersible, fluoroaliphatic radical-containing poly(oxyalkylene) compound; and(c) the balance of 100 parts of a liquid vehicle.A method of treating substrates and substrates treated with the treating composition are also provided.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: July 21, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: James J. Fong