Heterocyclic Ring Containing Dnrm Patents (Class 522/75)
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Patent number: 5374379Abstract: A method for making a PTC element grafts a crystalline polymer to conductive particles to form a PTC composition. The step of grafting including solution polymerization. The PTC composition is formed into a PTC element. The PTC element is cross-linked after forming. The PTC element according to this invention exhibits superior PTC behavior when the temperature of the PTC element reaches the crystal melting point of the crystalline polymer.Type: GrantFiled: September 15, 1992Date of Patent: December 20, 1994Assignee: Daito Communication Apparatus Co., Ltd.Inventors: Norio Tsubokawa, Naoki Yamazaki
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Patent number: 5373039Abstract: A resin composition suitable for marking with a laser and a method for laser marking said resin are provided. The resin composition comprises a thermoplastic resin, one or more compounds selected from the group consisting essentially of (i) tetrazole compounds, and (ii) sulfonylhydrazide, nitroso and azo compounds having a decomposition temperature of at least 210.degree. C., and carbon black.Type: GrantFiled: May 25, 1993Date of Patent: December 13, 1994Assignee: General Electric CompanyInventors: Kenichi Sakai, Takuro Kitamura, Hideki Kato
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Patent number: 5369140Abstract: A radiation curable composition contains as light stabiliser a UV absorber of formula I ##STR1## wherein R is hydrogen or C.sub.1 -C.sub.18 alkyl, R.sub.1 and R.sub.2 are each independently of the other H, OH, C.sub.1 -C.sub.12 alkyl, halogen or halomethyl,R.sub.3 and R.sub.4 are each independently of the other H, OH, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.18 alkoxy or halogen, andR.sub.5 and R.sub.6 are each independently of the other H, C.sub.1 -C.sub.12 alkyl or halogen. These UV absorbers are substantially non-yellowing.Type: GrantFiled: May 3, 1991Date of Patent: November 29, 1994Assignee: Ciba-Geigy CorporationInventors: Andreas Valet, Manfred Kohler
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Patent number: 5356948Abstract: A lubricious polymeric composition which is stable toward sterilizing radiation includes a semicrystalline polyolefin of narrow molecular weight distribution having incorporated therein a liquid mobilizing additive, a radiation stabilizing amount of a hindered amine, a lubricating amount of an erucic acid derivative and a clarifying amount of a sorbitol derivative. The invention includes a sterilized article fabricated from the composition and a method to radiation sterilize the article.Type: GrantFiled: January 26, 1994Date of Patent: October 18, 1994Assignee: Becton, Dickinson and CompanyInventors: Donald N. Payne, Jr., Jess M. Waller, Richard P. Clarke, George R. Titus, David A. Martin
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Patent number: 5352712Abstract: Ultraviolet radiation-curable primary and secondary coating compositions for optical fibers are disclosed. The primary coatings comprise a hydrocarbon polyol-based reactively terminated aliphatic urethane oligomer; a hydrocarbon monomer terminated with at least one end group capable of reacting with the terminus of the oligomer; and an optional photoinitiator. The secondary coatings comprise a polyester and/or polyether-based aliphatic urethane reactively terminated oligomer; a hydrocarbonaceous viscosity-adjusting component capable of reacting with the reactive terminus of (I); and an optional photoinitiator. Also disclosed are optical fibers coated with the secondary coating alone or with the primary and secondary coatings of the invention.Type: GrantFiled: April 16, 1992Date of Patent: October 4, 1994Assignee: Borden, Inc.Inventor: Paul J. Shustack
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Patent number: 5331019Abstract: A lubricious polymeric composition which is stable toward sterilizing radiation includes a semicrystalline polyolefin of narrow molecular weight distribution having incorporated therein a liquid mobilizing additive, a radiation stabilizing amount of a hindered amine, a lubricating amount of an erucic acid derivative and a clarifying amount of a sorbitol derivative. The invention includes a sterilized article fabricated from the composition and a method to radiation sterilize the article.Type: GrantFiled: September 4, 1990Date of Patent: July 19, 1994Assignee: Becton, Dickinson and CompanyInventors: Donald N. Payne, Jr., Jess M. Waller, Richard P. Clarke, George R. Titus, David A. Martin
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Patent number: 5322762Abstract: A highly stable photopolymerizable composition which is highly photosensitive to visible light, which can be hardened using a visible light laser, such as an argon laser, which provides excellent contrast between non-irradiated portions and the substrate under red light, and, moreover, which provides excellent contrast between the portions irradiated by the laser and the portions not irradiated. The photopolymerizable composition consists of 100 parts by weight of a resin which is hardenable under visible light having an irradiation energy mainly consisting of light rays in the 400 nm to 700 nm visible light region; 0.02 to 0.5 parts by weight of at least one dye selected from the group consisting of Victoria Pure Blue, anthraquinone dyes, monoazo dyes, and merocyanine dyes, these dyes having maximum absorption wavelengths from 550 to 700 nm; 0.1 to 5 parts by weight of the leuco dye 4,4'-(phenylmethylene bis[N,N-diethylbenzene amine]; and 0.1 to 5 parts by weight of tribromomethylphenyl sulphone.Type: GrantFiled: April 13, 1993Date of Patent: June 21, 1994Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Kenji Kushi, Chiho Tokuhara
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Patent number: 5302627Abstract: Adding a dye with a visible color to an ultraviolet radiation curable composition which contains a photoinitiator which generates free radicals upon exposure to ultraviolet radiation produces a composition which changes visible color upon exposure to ultraviolet radiation. This visible color change indicates that the composition has cured. This cure indication is useful for compositions curable by ultraviolet radiation in the electronics and electrical industry.Type: GrantFiled: March 9, 1992Date of Patent: April 12, 1994Assignee: Dow Corning CorporationInventors: Arthur J. Field, Michael R. Strong
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Patent number: 5290824Abstract: A novel photocrosslinkable polymeric system has been developed for processing into films having stable second-order nonlinear optical properties. In the present system, polymers bearing photo-crosslinkable chromophores, such as polyvinylcinnamate and are reacted with appropriately designed nonlinear optical molecules with the cinnamate or other photocrosslinkable functionalities for photocrosslinking at one, two or more points. The system can be poled and photocrosslinked in the poled state to yield a material with stable optical nonlinearity and large electro-optic coefficients.Type: GrantFiled: May 12, 1992Date of Patent: March 1, 1994Assignee: University of LowellInventors: Braja K. Mandal, Sukant K. Tripathy, Jan-Chuan Huang, Jayant Kumar
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Patent number: 5281569Abstract: A desensitizing ink for printing by wet or dry offset, flexographic or typographic printing is disclosed and claimed. This ink contains at least one desensitizing agent, at least one ink binder which is polymerizable or crosslinkable by UV light or electron beam radiations and, if necessary, an initiator system. Thus, the drying time of the printings is greatly reduced. The ink is free from vaporizable ink solvents.Type: GrantFiled: February 25, 1992Date of Patent: January 25, 1994Assignee: SICPA International S.A.Inventors: Albert Amon, Laszlo K. Boksanyi
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Patent number: 5276068Abstract: A polycarbonate dimethacrylate which is the condensation product of 2 parts of hydroxyalkylmethacrylate of the formula ##STR1## in which A is C.sub.1 -C.sub.6 alkylene, and 1 part of a bis(chloroformate) of the formula ##STR2## in which R is C.sub.2 -C.sub.5 alkylene having at least two carbon atoms in its principal chain and n is an integer from 1 to 4, is usable, admixed with a secondary monomer suitable for dental applications, such as BIS-GMA; PUDMA or the like, as an adhesive system for dental restorative materials. Particularly useful is the novel condensation product of 2-hydroxyethylmethacrylate and triethylene glycol bis(chloroformate).Type: GrantFiled: January 28, 1992Date of Patent: January 4, 1994Assignee: Jeneric/Pentron, Inc.Inventor: Samuel Waknine
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Patent number: 5260350Abstract: The present invention relates to a silicone coating composition which, when cured on a solid substrate either by ultraviolet or electron beam radiation, provides a transparent abrasion resistant coating firmly adhered thereon. The silicon coating is prepared by reacting at least one multifunctional acrylate monomer with an amino-organofunctional silane, mixing the modified silane with at least one acrylic monomer and thereafter adding colloidal silica.Type: GrantFiled: February 14, 1992Date of Patent: November 9, 1993Assignee: Dow Corning CorporationInventor: Antony P. Wright
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Patent number: 5238974Abstract: Disclosed is a cladding composition suitable for a plastic clad silica or glass core optical fiber of a good light transmittance. The cladding composition comprises (A) a fluorinated monofunctional acrylate or .alpha.-fluoroacrylate composition, (B) a polyfunctional acrylate or .alpha.-fluoroacrylate having at least two acryloyl or .alpha.-fluoroacryloyl radicals in the molecule, (C) a photoinitiator, and if desired, (D) a stabilizer selected from thiodicarboxylic acid diesters and hindered phenols. The fluorinated monofunctional acrylate or .alpha.-fluoroacrylate comprises 1-60 weight % of a highly fluorinated acrylate or .alpha.-fluoroacrylate of the formula: ##STR1## wherein Y is H or F, X is H or F, l is 1 to 12 and n is 5 to 12, and 40-99 weight % of a lowly fluorinated acrylate or .alpha.-fluoroacrylate of the formula: ##STR2## wherein X and Y are as defined above, and m is 1 to 3.Type: GrantFiled: November 15, 1990Date of Patent: August 24, 1993Assignee: Mitsubishi Rayon Company Ltd.Inventors: Takashi Yamamoto, Tsuruyoshi Matsumoto, Katsuhiko Shimada, Ryuji Murata
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Patent number: 5227410Abstract: The invention relates to silicone-polyether linear block copolymers of the formula ##STR1## wherein, R is hydrogen or a C.sub.(1-8) alkyl, alkoxyl or haloalkyl radical or a monovalent epoxy-functional organic radical;R.sup.1 is hydrogen or a C.sub.(1-8) alkyl or alkoxyl radical, or a monovalent epoxy-functional organic radical;provided that at least two R or R.sup.1 groups are either hydrogen or monovalent epoxy-functional organic radicals;R.sup.2 is a divalent alkylene radical;R.sup.3 is a C.sub.(2-6) alkyl or alkoxyl radical;n is a positive integer of about 4 to about 400;m is a whole number of from 0 to about 50; and,each of R, R.sup.1, R.sup.2 and R.sup.3 may be unsubstituted or substituted. The invention also relates to UV-curable compositions comprising the above-described compound, with or without a UV-detectable dye marker, and a process for making such a compound.Type: GrantFiled: December 5, 1991Date of Patent: July 13, 1993Assignee: General Electric CompanyInventors: Richard P. Eckberg, Robert F. Agars, Brian D. Shepherd
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Patent number: 5207577Abstract: A dental adhesive comprising a (meth)acryloylaminoalkyl carboxylate of the formula ##STR1## in which R.sup.1 represents hydrogen or methyl;R.sup.2 represents methylene or ethylene; andR.sup.3 represents hydrogen, methyl, or ethyl;and at least one of an initiator, a non-toxic solvent, and a filler. The dental adhesive is useful to effect a strong adhesive bonding of dental materials to collagen-containing materials.Type: GrantFiled: January 25, 1991Date of Patent: May 4, 1993Assignee: Bayer AktiengesellschaftInventors: Michael Muller, Wolfgang Podszun
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Patent number: 5204216Abstract: A radiation-sensitive mixture, essentially consisting of(a) a binder or binder mixture which is insoluble in water but soluble in aqueous alkaline solutions,(b) a compound which forms a strong acid on exposure to radiation and(c) one or more organic compounds which suppress the solubility of (a) in aqueous alkaline solutions,wherein component (c) is an organic compound of the general formula (I) ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, alkyl, alkoxy, aryl or aralkyl and R.sup.3 and R.sup.4 are each alkyl, cycloalkyl, aralkyl, aryl or a radical ##STR2## where n is from 1 to 5 and R.sup.5 is alkyl, alkoxy, aryl or aralkyl, or R.sup.3 together with R.sup.4 form a five-membered to seven-membered ring via --(CH.sub.2).sub.m -- in which m is from 4 to 6, is suitable for the production of relief structures.Type: GrantFiled: January 30, 1991Date of Patent: April 20, 1993Assignee: BASF AktiengesellschaftInventor: Son N. Kim
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Patent number: 5162390Abstract: Organophosphorus compounds capable of being activated with light at from 360 nm to about 410 nm, such as, an acylphosphine oxide, have been found useful as photoinitiators for effecting the cure of various UV curable coating compositions, such as a UV curable organic material in the presence of up to 20% by weight of a UV absorber. UV stabilized thermoplastic composites of films, sheets, or laminates having thickness of up to an inch or more with improved optical clarity also are provided.Type: GrantFiled: August 7, 1991Date of Patent: November 10, 1992Assignee: General Electric CompanyInventors: Mark G. Tilley, Peter M. Miranda
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Patent number: 5155143Abstract: A photocurable composition based on a cycloaliphatic polyepoxide, a poly(tetramethylene oxide)polyol and photoinitiator; and a printed circuit board having as a conformal coating thereon, the cured product of the photocurable composition.Type: GrantFiled: March 25, 1991Date of Patent: October 13, 1992Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Joseph V. Koleske
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Patent number: 5149592Abstract: A flexible glossy coating adherent to polyvinyl chloride for fleet marketing applications which comprises a backbone of cured polymer comprising from about 40 to 80 percent by weight a total of about at least one aliphatic urethane diacrylate normally provided as an oligomer and a total of from about 60 to about 20 percent by weight of a monofunctional component and from 0.5 to 6 percent by weight of an organosilicone component.Type: GrantFiled: February 4, 1991Date of Patent: September 22, 1992Assignee: Avery Dennison CorporationInventor: Mitchell F. Wojnarowicz
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Patent number: 5141990Abstract: In-situ development of an ultraviolet absorber is provided by a compound such as a hydroxy-phenyl-triazole containing a group which protects the absorber during actinically activated polymerization by light at first frequency. After polymerization the protective group is removed by actinic reaction at a second frequency lower than the first frequency. The protective group is formed by replacing the hydrogen of the hydroxyl group with an acyl group containing 1 to 3 carbon atoms or an acryloxy group of the formula: ##STR1## where R.sup.1 is either an alkyl containing 1 to 6 carbon atoms or --CH.dbd.CH.sub.2.Type: GrantFiled: October 25, 1989Date of Patent: August 25, 1992Assignee: California Institute of TechnologyInventors: Vincent B. McKoy, Amitava Gupta
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Patent number: 5122593Abstract: Excellent stabilization of polypropylene (PP) fibers exposed to sterilization levels of gamma radiation, is obtained with a hybrid stabilizer having a N-(substituted)-1-(piperazin-2-one alkyl) group at one end and a (3,5-dialkyl-4-hydroxyphenyl)-.alpha.,.alpha.-disubstituted acetamide at the other. When this hybrid of a hindered amine with a hindered phenol is combined through a disubstituted alpha carbon atom of the acetamide in a single molecule, it affords the advantages of each group with respect to its stabilization against oxidation, but without the known inherent disadvantages of either group. This molecule is N-(substituted)-1-(piperazin-2-one alkyl)-.alpha.-(3,5-dialkyl-4-hydroxyphenyl)-.alpha.,.alpha.-substituted acetamide molecule ("3,5-DHPZNA" for brevity).Type: GrantFiled: February 22, 1989Date of Patent: June 16, 1992Assignee: The B. F. Goodrich CompanyInventors: Eileen Jennings, John T. Lai
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Patent number: 5114831Abstract: These photopolymerizable laminating materials consist of at least one film-forming polymer as a binder, at least one organic compound which is compatible with the binder, has at least two double bonds capable of addition polymerization and may be partially replaced by an organic compound having only one double bond capable of addition polymerization, a photoinitiator or photoinitiator system and an adhesion promoter, with or without conventional additives and assistants, the adhesion promoter used being a tricyclic heteroaromatic compound which is soluble in aqueous alkaline solutions.The said laminating materials are suitable for the production of printed circuits.Type: GrantFiled: August 2, 1990Date of Patent: May 19, 1992Assignee: BASF AktiengesellschaftInventors: Friedrich Seitz, Gerhard Hoffmann, Gerhard Bauer
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Patent number: 5095043Abstract: There is provided a novel substantially anhydrous UV curable composition comprising a monomer and a solvent wherein the monomer is a multi-functional, non-oxygen inhibited polyacrylate and the solvent is a low volatility solvent containing at least 2 oxygenated functions which is substantially incorporated into the polymer during the curing step. There is also provided a method of curing such compositions which avoids the conventional drying step required heretofore.Type: GrantFiled: February 8, 1991Date of Patent: March 10, 1992Inventor: Peter Cueli
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Patent number: 5085973Abstract: Herein is provided a color filter prepared by providing red, green and blue image elements, comprising as photosensitive resin and a pigment, and a black matrix on a transparent substrate and further providing thereon a transparent electrode layer, wherein said photosensitive resin is so formulated that it comprises a polyfunctional acrylate monomer, an organic polymer binder and a photopolymerization initiator comprising a 2-mercapto-5-substituted thiadiazole compound represented by general formulas (I) and/or general formulas (II), a phenyl ketone compound represented by general formulas (III) and 2,4,5-triphenylimidazolyl dimer composed of two lophine residues combined to each other through intermediation of a single covalent bond.A pattern having a high precision and a good surface smoothness can be obtained owing to the photosensitive resin, and a color filter having a good environmental resistance can be obtained owning to the pigment.Type: GrantFiled: June 13, 1991Date of Patent: February 4, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tokihiko Shimizu, Kesanao Kobayashi
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Patent number: 5021188Abstract: Optically responsive films comprising birefringent nematic and/or birefringent chiral nematic liquid crystal microdroplets dispersed in electron beam cured polymeric reaction products are disclosed.Type: GrantFiled: December 28, 1989Date of Patent: June 4, 1991Assignee: General Motors CorporationInventors: Nuno A. Vaz, George W. Smith
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Patent number: 5021466Abstract: There is provided a novel substantially anhydrous UV curable composition comprising a monomer and a solvent wherein the monomer is a multi-functional non-oxygen inhibited polyacrylate and the solvent is a low volatility solvent containing at least 2 oxygenated functions which is substantially incorporated into the polymer during the curing step. There is also provided a method of curing such compositions which avoids the conventional drying step required heretofore.Type: GrantFiled: October 24, 1988Date of Patent: June 4, 1991Inventor: Peter Cueli
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Patent number: 5015555Abstract: Improved photosensitive compositions contain a heterocyclic triazole or its hydrate such as 1-hydroxy benzotriazole hydrate.Type: GrantFiled: May 27, 1988Date of Patent: May 14, 1991Assignee: E. I. Du Pont de Nemours and CompanyInventor: Kenneth I. Lazaar
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Patent number: 4987055Abstract: A photopolymerizable mixture is described comprising (a) a polymeric binder, (b) an acrylate or alkacrylate of a polyhydric alcohol, said compound comprising at least one group which is photooxidizable on exposure to actinic radiation in the presence of a photoreduciable dye, (c) a photoinitiator comprising a photoreducible benzoxanthene or benzothioxanthene dye, and (d) a second photoinitiator comprising a trihalomethyl compound capable of being cleaved by irradiation. The mixture is suitable for the production of printing plates and photoresists and displays increased photosensitivity.Type: GrantFiled: December 21, 1988Date of Patent: January 22, 1991Assignee: Hoechst AktiengesellschaftInventors: Klaus Rode, Dieter Mohr, Werner Frass, Joachim Gersdorf
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Patent number: 4965303Abstract: A polycarbonate composition comprising 100 parts by weight of polycarbonate and 0.1 to 1.0 part by weight of at least one anti-yellowing compound selected from the group consisting of itaconic acid, itaconic anhydride, benzaldehyde dimethyl acetal, benzaldehyde propyleneglycol acetal and p-phthalaldehyde.Type: GrantFiled: August 3, 1989Date of Patent: October 23, 1990Assignee: Teijin Chemicals, Ltd.Inventor: Kazuo Kishimoto
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Patent number: 4965171Abstract: Disclosed is a photopolymerizable composition which is very sensitive to visible light. The composition comprises a polymerizable compound and a photopolymerization initiator wherein the photopolymerization initiator comprises (A) a particular xanthene, coumarin or merocianine dyestuff, (B) a diaryliodonium salt and (C) a compound having the formula; R(n)--D--CH.sub.Type: GrantFiled: May 18, 1989Date of Patent: October 23, 1990Assignee: Nippon Paint Co., Ltd.Inventors: Masami Kawabata, Masahiko Harada, Yasuyuki Takimoto
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Patent number: 4940649Abstract: Novel photopolymerizable recording materials suitable in particular for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable, olefinically unsaturated organic compounds, optionally a polymeric binder, a photopolymerization initiator, a color-forming system composed of a color former and a photooxidant, a certain 4-phenylpyridine as sensitizer and optionally further additive and/or auxiliary substances.Type: GrantFiled: May 17, 1988Date of Patent: July 10, 1990Assignee: BASF AktiengesellschaftInventors: Reinhard Aldag, Peter Neumann, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz, Friedrich-Wilhelm Raulfs
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Patent number: 4925660Abstract: A crude drug ingredient having bactericidal activity incorporated into a curable composition comprising a (meth)acrylate type monomer, a polymerization initiator and if necessary a filler to formulate the ingredient into the drug having sustained release property. The curable composition containing the crude drug ingredient is applied to a defective part of a tooth or an artificial gum for preventing dental diseases such as carious tooth, pyorrhea alveolaris, and the like.Type: GrantFiled: April 7, 1988Date of Patent: May 15, 1990Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Mitsuru Atsuta, Takeshi Sakashita, Ryoichi Miyamoto, Yukinori Tanimura, Saburo Fuji
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Patent number: 4902725Abstract: A photocured acrylic coat comprised of the photoreaction products of:(i) at least one photocurable polyfunctional acrylate monomer;(ii) at least one phenyl ketone photoinitiator; and(iii) at least one active ultraviolet radiation absorber selected from benzotriazoles, cyanoacrylates, and hydroxybenzophenones. The coating is substantially completely or completely cured and provides improved protection to the substrate against ultraviolet radiation. The coating is also nonopaque or transparent.Type: GrantFiled: November 7, 1988Date of Patent: February 20, 1990Assignee: General Electric CompanyInventor: James E. Moore
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Patent number: 4902724Abstract: A photocured acrylic coating comprised of the photoreaction products of:(i) at least one photocurable polyfunctional acrylate monomer;(ii) at least one acetophenone photoinitiator; and(iii) at least one active ultraviolet radiation absorber selected from benzotriazoles, cyanoacrylate, and hydroxybenzophenones. The coating is substantially or completely cured and provides improved protection to the substrate against ultraviolet radiation.Type: GrantFiled: April 21, 1989Date of Patent: February 20, 1990Assignee: General Electric CompanyInventor: James E. Moore
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Patent number: 4894401Abstract: A composition sufficiently irradiated to achieve sterilization comprising:(i) at least one aromatic carbonate resin; and(ii) an antiyellowing upon exposure to sterilizing irradiation effective amount of at least one effective epoxide compound.Type: GrantFiled: December 22, 1986Date of Patent: January 16, 1990Assignee: General Electric CompanyInventor: Linda H. Nelson
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Patent number: 4888369Abstract: Disclosed is a high energy radiation resistant, polypropylene composition. It consists essentially of substantially crystalline normally solid polypropylene having a narrow molecular weight distribution, and, dispersed therein at a concentration effective to increase substantially the high energy radiation resistance of the polypropylene, a synergistic mixture of:(1) a hindered amine component,(2) a hindered phenolic component, and(3) a phosphorous containing component,the weight ratios of component (1) to component (2) to component (3) being about 1:(0.1-2):(0.1-2).Also disclosed are radiation sterilized articles in which at least part of the material of construction comprises the polypropylene composition.Type: GrantFiled: April 24, 1987Date of Patent: December 19, 1989Assignee: Himont IncorporatedInventor: Edward P. Moore, Jr.
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Patent number: 4870121Abstract: Polymeric dielectrics which are exposed to highly divergent electric fields break down more quickly than expected because of the generation of ultra-violet radiation at defect points which degrades the polymer locally and leads to the formation of electrical trees in a polymeric insulation. The use of ultra-violet stabilizers, preferably in combination with reduced concentration of oxygen in the polymer, significantly extends the time to initiation of electrical treeing by preventing photodegradation of the polymer.Type: GrantFiled: October 26, 1987Date of Patent: September 26, 1989Assignee: Canadian Patents & Development Ltd.Inventors: Soli S. Bamji, Aleksander T. Bulinski, John Densley
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Patent number: 4839401Abstract: A light curable pit and fissure sealant composition comprises 2,2-propane-bis [3-(4-phenoxy)-1,2-dihydroxy-propane-1- methacrylate] and triethylene glycol dimethacrylate in a 55:45 weight ratio, a polymerization initiator, titanium dioxide as an opaquing agent, and DEA-EMA of at least 95 percent purity as the polymerization accelerator. Optionally, up to 50% filler can be used.Type: GrantFiled: September 30, 1986Date of Patent: June 13, 1989Assignee: Jeneric/Pentron, Inc.Inventor: Samuel Waknine
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Patent number: 4797438Abstract: Excellent stabilization of polypropylene (PP) is obtained with a hindered amine containing a polysubstituted piperazin-2-one (PSP) moiety, for example, a C.sub.2 -C.sub.12 alkylene connecting two PSP moieties, or a polyalkylene polyamine having pendant substituted oxo-piperazinyltriazine moieties (PIP-T), that is, having pendant triazine rings substituted with PSP substituents. The stabilizers are particularly effective for PP irradiated with high energy gamma-radiation. Irradiated articles made from PP stabilized with such a hindered amine have improved strength and discoloration resistance, compared to articles made from polymer stabilized with several other hindered amines tested, particularly the 2,2,6,6-tetramethyl-4-piperidyl sebacate.Type: GrantFiled: May 11, 1987Date of Patent: January 10, 1989Assignee: The B. F. Goodrich CompanyInventors: George Kletecka, John T. Lai, Pyong-Nae Son
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Stabilized solutions of radiation-crosslinkable polymer precursors of highly heat-resistant polymers
Patent number: 4757098Abstract: Stabilized solutions of radiation-crosslinkable polymer precursors of highly heat-resistant polymers, containing chelate complex-formers as stabilizers, do not tend to gel through premature crosslinking and can thus be stored and used over a long period.Type: GrantFiled: April 17, 1986Date of Patent: July 12, 1988Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Hans J. Merrem, Rudolf Klug, Horst Binder -
Patent number: 4749734Abstract: The present invention relates generally to semi-crystalline polymers which are suitable for stabilization by irradiation sterilization. More particularly, the present invention relates to improved additives for semi-crystalline polymers, such as propylene polymer compositions, to improve the properties of the polymer when subject to irradiation.Type: GrantFiled: January 31, 1985Date of Patent: June 7, 1988Assignee: Becton, Dickinson and CompanyInventors: Joel L. Williams, Terry S. Dunn
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Patent number: 4721734Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, chlorine, phenyl, dialkylamino of 2-4 carbon atoms or alkyl or alkoxy each of up to 18 carbon atoms; R.sub.2 is hydrogen, chlorine, bromine or alkyl or alkoxy each of up to 4 carbon atoms; R.sub.3 and R.sub.4, which can be the same or different, each is hydrogen or alkyl of up to 6 carbon atoms; R.sub.5 is hydrogen or alkyl or alkanoyl each of up to 4 carbon atoms; and R.sub.6 is hydrogen or methyl, with the proviso that not all of R.sub.1 to R.sub.6 simultaneously are hydrogen, are effective photosensitizers, especially for photopolymerization of unsaturated compounds and for hardening of printing dyes.Type: GrantFiled: August 31, 1984Date of Patent: January 26, 1988Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Juergen Gehlhaus, Manfred Kieser
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Patent number: 4710524Abstract: A radiation stabilized and sterilized, flexible article is comprised of a semi-crystalline polymer having a crystalline content of from twenty percent to ninety percent. This polymer has been irradiated with a sterilizing amount of high energy radiation while having incorporated therein radiation stabilizing amounts of a hindered piperidine compound a benzophenone precursor sufficient to render the article substantially resistant to radiolysis while retaining its flexibility.A method for sterilizing and radiation stabilizing a semi-crystalline polymer is also part of the present invention.Type: GrantFiled: August 5, 1985Date of Patent: December 1, 1987Assignee: Becton, Dickinson and CompanyInventor: John Donohue
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Patent number: 4680249Abstract: Improved adhesion to a substrate is obtained employing a photopolymerizable composition containing a carboxy benzotriazole.Type: GrantFiled: May 28, 1986Date of Patent: July 14, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Gregory C. Weed
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Patent number: 4654292Abstract: A photoresist composition comprising a conjugated diene polymer or its cyclized product, a photocuring agent soluble in an organic solvent and a pyrazole compound having a skeleton represented by the following formula. ##STR1## Also provided is a method of forming a photoresist pattern using the aforesaid composition.Type: GrantFiled: September 17, 1985Date of Patent: March 31, 1987Assignees: Nippon Zeon Co., Ltd., Fujitsu LimitedInventors: Masayuki Oie, Satoshi Ogawa, Sadao Sugimoto, Masahiro Yamazaki, Katsuhiro Fujino
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Patent number: 4629679Abstract: A photopolymerizable resin composition is described which comprises, (a) 40 to 85 wt. %, based on the composition, of a thermoplastic polymer binder, (b) 15 to 60 wt. %, based on the composition, of a cross-linkable monomer having at least one ethylenically unsaturation, (c) 0.5 to 10 wt. %, based on the total of the binder (a) and the monomer (b), of a photopolymerization initiator, and (d) 0.005 to 1 wt. %, based on the total of the binder (a) and the monomer (b), of a tetrazole compound of the formula: ##STR1## wherein R.sub.1 is H, halogen, methyl, ethyl, phenyl, carboxyl, amino, dimethylamino, diethylamino, methoxy, ethoxy, mercapto or sulfonic acid; and R.sub.2 is H, methyl, ethyl, phenyl, amino or mercapto. The photopolymerization resin composition exhibits an enhanced adhesion to a metal surface, and is useful as a photoresist for fabrication of a printed circuit board.Type: GrantFiled: February 25, 1986Date of Patent: December 16, 1986Assignee: Mitsubishi Rayon Company Ltd.Inventors: Hiroyuki Uchida, Jun Nakauchi
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Patent number: 4619949Abstract: Abrasion resistant films formed by the copolymerization of epoxy-terminated silanes and an aliphatic monoepoxy resin display reduced odor and increased water-repellency.Type: GrantFiled: January 7, 1986Date of Patent: October 28, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: John F. Kistner
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Patent number: 4601972Abstract: A multilayer circuit device comprises a substrate having a plurality of metallized patterns thereon said patterns being separated by a photodefined polymeric dielectric film formed from a polymeric photodefinable triazine base mixture including a photosensitive acrylate moiety. The various circuit patterns are interconnected by means of microvias through the polymeric film or film layers.Type: GrantFiled: July 26, 1985Date of Patent: July 22, 1986Assignee: AT&T Technologies, Inc.Inventor: Richard D. Small, Jr.
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Patent number: 4569962Abstract: Polymeric compositions are provided in which perfluoropolyethers have been solubilized in non-fluorinated solvents by combining them with a solubilizing agent such as azotic conjugated compounds, and phosphorylated compounds. Typical of the perfluoropolyethers is ##STR1## Typical of the solubilizing agents is phosphorylated methacryloyloxyhydroxypropylisophthalate. The perfluoropolyether and the solubilizing agent are mixed to form a paste which is soluble in organic solvents such as methylethylketone. These compositions find utility as protective lubricant coatings for thin film magnetic recording media. They have the advantage that only one coating step is required in order to apply both the phosphorylated compound and the lubricating polyether. Recording media lubricated with these compositions have demonstrated excellent wear characteristics.Type: GrantFiled: September 19, 1983Date of Patent: February 11, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventors: Mario D. Burguette, George D. Foss
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Patent number: 4563259Abstract: Polyolefin compositions and articles, especially articles of medical ware, such as polypropylene hypodermic syringes, are made more resistant to the embrittlement which accompanies sterilization by high energy (e.g. gamma) irradiation by the addition to a polyolefin of narrow molecular weight distribution of a heterocyclic hindered amine and, optionally, a liquid modifier.Type: GrantFiled: September 28, 1982Date of Patent: January 7, 1986Assignee: Imperial Chemical Industries PLCInventor: Martin G. Rayner