Patents Assigned to Loctite
  • Patent number: 4245077
    Abstract: Anaerobic compositions containing strong acid impurities and/or strong acid precursors are neutralized and stabilized against the degrading effects of pH decrease during storage by adding about 0.1 to about 10 percent by weight of the total composition of an epoxy.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: January 13, 1981
    Assignee: Loctite Corporation
    Inventor: JoAnn DeMarco
  • Patent number: 4243578
    Abstract: An improved dental filling material is prepared from polymerizable urethane-acrylate resins which cure by a free-radical mechanism to form hard and durable filling compositions which bond strongly and adhesively to tooth enamel, to dentin, to dental prostheses and to preexisting dental filling materials.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: January 6, 1981
    Assignee: Loctite Corporation
    Inventors: Denis J. O'Sullivan, Bernard J. Bolger, T. Eisirt Casey
  • Patent number: 4180640
    Abstract: Curable acrylate ester compositions having as an accelerator for the polymerization a hydrazine derivative of the formula R.sup.1 --HN--NH--CO--R.sup.2 and as a co-accelerator, an acid having a pK.sub.a of less than about 6. The compositions may optionally be formulated as two-part compositions with the non-ester-containing part being applied as a primer. Typical of the monomers are the polyalkylene glycol dimethacrylates and the so-called urethane acrylates. Polymerization is preferably initiated by a peroxy compound such as cumene hydroperoxide, such a composition having anaerobic curing characteristics.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: December 25, 1979
    Assignee: Loctite Corporation
    Inventors: David P. Melody, Daniel A. Doherty, John F. O'Grady, Richard D. Rich
  • Patent number: 4165400
    Abstract: A self-emulsifying anaerobic-curing composition is disclosed. The composition is rendered self-emulsifying by incorporating certain anionic and/or nonionic surfactants in a concentration range of about 0.25 to about 10.0 percent. The preferred anionics comprise the petroleum sulfonates and the sodium alkyl or alkylaryl sulfonates. The preferred nonionics comprise the ethoxylated alkyl alcohols, the ethoxylated alkyl phenols, and the polyoxyethylene/polyoxypropylene glycols. Any anaerobic monomer or monomer mixture in which the surfactant is soluble and compatible with the cure system may be used. These self-emulsifiable compositions have the advantage of being readily removed from surfaces by washing with water, which makes them especially useful in impregnation processes where uncured resin must be removed from areas which are difficult to wash, such as small, blind holes.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: August 21, 1979
    Assignee: Loctite Corporation
    Inventor: JoAnn DeMarco
  • Patent number: 4159976
    Abstract: A curable system such as a curable adhesive type system having a relatively long pot life is disclosed. The curable system of the present invention comprises polymer containing material including at least one curable epoxy resin, at least one imidazole type catalytic curing agent for the resin and a solvent for the epoxy resin capable of suppressing or inhibiting the catalytic reaction between the resin and curing agent at least at about room temperature, the solvent being selected from methanol, ethanol and mixtures thereof.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: July 3, 1979
    Assignee: Loctite Corporation
    Inventor: James P. Moran, Jr.
  • Patent number: 4118442
    Abstract: There is provided a curable anaerobic pressure sensitive adhesive composition, a mixture of a curable anaerobic system and a high molecular weight polymer system. The mixture which may include a tackifier and other functional additives constitutes a pressure sensitive adhesive and exhibits elastomeric properties. There is also provided in the composition an initiator systemnecessary to permit curing of the anaerobic pressure sensitive composition upon activation by the exclusion of oxygen. One or more accelerators for cure may also be provided.In one embodiment a component of the catalyst system may be either absent and provided later or latently present in microspheres which upon rupture will enhance the curing operation.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: October 3, 1978
    Assignees: Avery Products Corporation, Loctite Corporation
    Inventors: Maurice Douek, Gustav A. Schmidt, Bernard M. Malofsky, Martin Hauser
  • Patent number: 4105715
    Abstract: A cyanoacrylate adhesive composition in thixotropic paste form is made by mixing a liquid cyanoacrylate ester with powdered organic fillers selected from (i) polycarbonates, (ii) polyvinylidene fluorides, (iii) polyethylenes, and (iv) acrylic block copolymer resins containing saturated elastomer segments. Concentration of the filler is about 5 to 100 parts by weight. Particle size of the filler is about 2 to 200 microns.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: August 8, 1978
    Assignee: Loctite (Ireland) Limited
    Inventor: Edward R. Gleave
  • Patent number: 4102945
    Abstract: A cyanoacrylate adhesive composition thickened by a copolymer or terpolymer resin capable of being dissolved or solvated by the cyanoacrylate monomer exhibits significantly improved peel strength. Storage stability is also enhanced. Preferred thickeners are acrylonitrile-butadiene-styrene terpolymers, methacrylate-butadiene-styrene terpolymers, and vinylidene chloride-acrylonitrile copolymers. Preferred monomers are methyl and ethyl cyanoacrylates.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: July 25, 1978
    Assignee: Loctite (Ireland) Limited
    Inventor: Edward Roger Gleave
  • Patent number: 4103081
    Abstract: A curable anaerobic adhesive composition is provided in which a nitrobenzene, particularly a chlorinated nitrobenzene, is incorporated as a stabilizer. The nitrobenzene stabilizer is particularly useful in anaerobic compositions having polyethylene glycol dimethacrylate as a basic polymerizable monomer.
    Type: Grant
    Filed: September 3, 1976
    Date of Patent: July 25, 1978
    Assignee: Loctite Corporation
    Inventor: Stephen Repetto
  • Patent number: 4100141
    Abstract: Stabilized, curable compositions formed from known free radical-polymerizable monomers (e.g., acrylates, stryene, etc.), and free radical initiators (e.g., peroxides, hydroperoxides, ultraviolet-sensitive compounds) by dissolving therein compounds containing the combination of allyl, lower alkoxyl and hydroxyl groups. All the groups may be present in one molecule, or the allyl group may occur in a separate molecule. Concentration of each compound may be in the range of about 0.01 to about 5 percent by weight of the total composition.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: July 11, 1978
    Assignee: Loctite (Ireland) Limited
    Inventor: Denis Joseph O'Sullivan
  • Patent number: 4093556
    Abstract: A process for producing metallocenes encapsulated by a urea-formaldehyde polymer shell. The presence of a small amount of a cationic surfactant, preferably an alkyl hydroxy amine, is required during the condensation polymerization which forms the shell.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: June 6, 1978
    Assignee: Loctite Corporation
    Inventor: Stanley Wojciak
  • Patent number: 4092376
    Abstract: There is provided a curable anaerobic pressure sensitive adhesive composition, a mixture of a curable anaerobic system and a high molecular weight polymer system. The mixture which may include a tackifier and other functional additives constitutes a pressure sensitive adhesive and exhibits elastomeric properties. There is also provided in the composition an initiator system necessary to permit curing of the anaerobic pressure sensitive composition upon activation by the exclusion of oxygen. One or more accelerators for cure may also be provided.In one embodiment a component of the catalyst system may be either absent and provided later or latently present in microspheres which upon rupture will enhance the curing operation.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: May 30, 1978
    Assignees: Avery Products Corporation, Loctite Corporation
    Inventors: Maurice Douek, Gustav A. Schmidt, Bernard M. Malofsky, Martin Hauser
  • Patent number: 4092374
    Abstract: There is provided a curable anaerobic pressure sensitive adhesive composition, a mixture of a curable anaerobic system and a high molecular weight polymer system. The mixture which may include a tackifier and other functional additives constitutes a pressure sensitive adhesive and exhibits elastomeric properties. There is also provided in the composition an initiator system necessary to permit curing of the anaerobic pressure sensitive composition upon activation by the exclusion of oxygen. One or more accelerators for cure may also be provided.In one embodiment a component of the catalyst system may be either absent and provided later or latently present in microspheres which upon rupture will enhance the curing operation.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: May 30, 1978
    Assignees: Avery Products Corporation, Loctite Corporation
    Inventors: Maurice Douek, Gustav A. Schmidt, Bernard M. Malofsky, Martin Hauser
  • Patent number: 4079693
    Abstract: An applicator for applying a layer of coating material around the circumference of an internal surface of a bore within a member, such as on the internal surface of an elongated socket. The applicator includes a chamber which has an elongated portion which can be inserted within the bore of the member to be coated. This chamber is then filled with the coating material to be applied. When the member to be coated is arranged on the elongated portion of the chamber, such arrangement is sensed and serves to actuate a mechanism for providing an opening within the elongated portion. Coating material then passes through this opening into contact with the internal surface of the member.
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: March 21, 1978
    Assignee: Loctite Corporation
    Inventor: Robert John Cotter
  • Patent number: 4079692
    Abstract: A coating applicator for applying a layer of coating material around the circumference of a portion of an elongated shaft, such as a bolt. The applicator includes a chamber which is filled with coating material and has an opening for receiving the elongated member. The opening in the chamber has a cross-sectional dimension just slightly larger than the elongated member. A cover arranged within the chamber in sealing contact with the opening prevents leakage of coating material. This cover is retractable upon insertion of the elongated member into the chamber. Coating material then totally surrounds and coats the entire circumference of a limited longitudinal portion of the elongated member. The coated elongated member is subsequently removed from the chamber. As the elongated member is removed, the inner walls of the chamber which define the opening serve to remove excess coating material from the member and to smooth the layer of coating material.
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: March 21, 1978
    Assignee: Loctite Corporation
    Inventors: Martin Charles Cosgrove, Robert John Cotter
  • Patent number: 4069378
    Abstract: A self-emulsifying anaerobic-curing composition is disclosed. The composition is rendered self-emulsifying by incorporating certain anionic and/or nonionic surfactants in a concentration range of about 0.25 to about 10.0 percent. The preferred anionics comprise the petroleum sulfonates and the sodium alkyl or alkylaryl sulfonates. The preferred nonionics comprise the ethoxylated alkyl alcohols, the ethoxylated alkyl phenols, and the polyoxyethylene/polyoxypropylene glycols. Any anaerobic monomer or monomer mixture in which the surfactant is soluble and compatible with the cure system may be used.These self-emulsifiable compositions have the advantage of being readily removed from surfaces by washing with water, which makes them especially useful in impregnation processes where uncured resin must be removed from areas which are difficult to wash, such as small, blind holes.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: January 17, 1978
    Assignee: Loctite Corporation
    Inventor: JoAnn DeMarco
  • Patent number: 4043683
    Abstract: A hand-held, manually-operated device for dispensing a viscous liquid in conjunction with a wiping action. Downward pressure on a handle causes expression of viscous material through one or more perforations or orifices in a flexible seal which is in abutting relationship with a surface to which the material is to be applied. As the device is slid across such surface the flexible seal provides both a sealing and a wiping action. When downward pressure is released, an expansion gap is created within the device, thereby relieving expression forces.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: August 23, 1977
    Assignee: Loctite Corporation
    Inventors: Charles R. Costa, Robert L. Smigel
  • Patent number: 4043982
    Abstract: This invention relates to polymerizable compositions, which serve as adhesives, sealants, potting compounds, etc., the primary components of which are an acyl peroxide initiator, an arylamine polymerization accelerator, and a polymerizable acrylate-isocyanate monomer.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: August 23, 1977
    Assignee: Loctite (Ireland) Limited
    Inventors: Denis J. O'Sullivan, Bernard J. Bolger, T. Eisert Casey
  • Patent number: D255870
    Type: Grant
    Filed: August 23, 1978
    Date of Patent: July 15, 1980
    Assignee: Loctite Corporation
    Inventors: Michael O'Donovan, Alan F. Lennox
  • Patent number: D255871
    Type: Grant
    Filed: August 23, 1978
    Date of Patent: July 15, 1980
    Assignee: Loctite Corporation
    Inventors: Michael O'Donovan, Alan F. Lennox