Patents Represented by Attorney Jean B. Mauro
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Patent number: 4287330Abstract: 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. 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: GrantFiled: May 23, 1975Date of Patent: September 1, 1981Assignee: Loctite CorporationInventor: Richard D. Rich
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Patent number: 4262106Abstract: Polymerizable anaerobic compositions can be made more stable and capable of greater speed of cure by removing from the composition at least a substantial portion of the metal contamination.Type: GrantFiled: March 16, 1979Date of Patent: April 14, 1981Assignee: Loctite CorporationInventors: Elliott Frauenglass, Jeremy W. Gorman
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Patent number: 4245077Abstract: 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: GrantFiled: March 29, 1978Date of Patent: January 13, 1981Assignee: Loctite CorporationInventor: JoAnn DeMarco
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Patent number: 4243578Abstract: 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: GrantFiled: January 17, 1980Date of Patent: January 6, 1981Assignee: Loctite CorporationInventors: Denis J. O'Sullivan, Bernard J. Bolger, T. Eisirt Casey
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Patent number: 4180640Abstract: 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: GrantFiled: October 31, 1977Date of Patent: December 25, 1979Assignee: Loctite CorporationInventors: David P. Melody, Daniel A. Doherty, John F. O'Grady, Richard D. Rich
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Patent number: 4165400Abstract: 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: GrantFiled: September 19, 1977Date of Patent: August 21, 1979Assignee: Loctite CorporationInventor: JoAnn DeMarco
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Patent number: 4159976Abstract: 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: GrantFiled: March 10, 1977Date of Patent: July 3, 1979Assignee: Loctite CorporationInventor: James P. Moran, Jr.
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Patent number: 4118442Abstract: 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: GrantFiled: September 17, 1976Date of Patent: October 3, 1978Assignees: Avery Products Corporation, Loctite CorporationInventors: Maurice Douek, Gustav A. Schmidt, Bernard M. Malofsky, Martin Hauser
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Patent number: 4105715Abstract: 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: GrantFiled: July 11, 1977Date of Patent: August 8, 1978Assignee: Loctite (Ireland) LimitedInventor: Edward R. Gleave
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Patent number: 4102945Abstract: 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: GrantFiled: July 11, 1977Date of Patent: July 25, 1978Assignee: Loctite (Ireland) LimitedInventor: Edward Roger Gleave
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Patent number: 4103081Abstract: 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: GrantFiled: September 3, 1976Date of Patent: July 25, 1978Assignee: Loctite CorporationInventor: Stephen Repetto
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Patent number: 4100141Abstract: 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: GrantFiled: July 2, 1976Date of Patent: July 11, 1978Assignee: Loctite (Ireland) LimitedInventor: Denis Joseph O'Sullivan
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Patent number: 4093556Abstract: 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: GrantFiled: July 2, 1975Date of Patent: June 6, 1978Assignee: Loctite CorporationInventor: Stanley Wojciak
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Patent number: 4092374Abstract: 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: GrantFiled: September 17, 1976Date of Patent: May 30, 1978Assignees: Avery Products Corporation, Loctite CorporationInventors: Maurice Douek, Gustav A. Schmidt, Bernard M. Malofsky, Martin Hauser
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Patent number: 4092376Abstract: 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: GrantFiled: September 17, 1976Date of Patent: May 30, 1978Assignees: Avery Products Corporation, Loctite CorporationInventors: Maurice Douek, Gustav A. Schmidt, Bernard M. Malofsky, Martin Hauser
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Patent number: 4069378Abstract: 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: GrantFiled: June 17, 1976Date of Patent: January 17, 1978Assignee: Loctite CorporationInventor: JoAnn DeMarco
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Patent number: 4043683Abstract: 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: GrantFiled: September 4, 1975Date of Patent: August 23, 1977Assignee: Loctite CorporationInventors: Charles R. Costa, Robert L. Smigel
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Patent number: 4043982Abstract: 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: GrantFiled: July 30, 1975Date of Patent: August 23, 1977Assignee: Loctite (Ireland) LimitedInventors: Denis J. O'Sullivan, Bernard J. Bolger, T. Eisert Casey
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Patent number: 4038475Abstract: Anaerobic compositions possessing high stability, and which are capable of extremely rapid speed of cure, are prepared by adding to a combination of a polymerizable acrylate ester monomer and a peroxy polymerization initiator therefor, a small but effective amount of a soluble metal chelating agent which does not materially affect the speed of cure of the anaerobic composition when used on metal surfaces.Type: GrantFiled: August 28, 1975Date of Patent: July 26, 1977Assignee: Loctite CorporationInventors: Elliott Frauenglass, Gerhardt P. Werber
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Patent number: D261400Type: GrantFiled: January 28, 1980Date of Patent: October 20, 1981Assignee: Loctite Puerto RicoInventors: Glenn L. Beall, Lawrence Petersen, Richard J. Dauksys