Naphthenic Acid Or Derivative Patents (Class 524/286)
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Patent number: 8932483Abstract: A thermoplastic composition that comprises a low-naphthenic, thermotropic liquid crystalline polymer blended with a flow modifier is provided. The flow modifier is an aromatic carboxylic acid that contains one or more carboxyl functional groups. Without intending to be limited by theory, it is believed that the functional groups can react with the polymer chain to shorten its length and thus reduce melt viscosity. It is also believed that such acids can combine smaller chains of the polymer together after they have been cut during processing. This helps maintain the mechanical properties of the composition even after its melt viscosity has been reduced. As a result of the present invention, the melt viscosity of the thermoplastic composition is generally low enough so that it can readily flow into the cavity of a mold having small dimensions.Type: GrantFiled: November 13, 2012Date of Patent: January 13, 2015Assignee: Ticona LLCInventor: Young Shin Kim
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Patent number: 8926862Abstract: A thermoplastic composition that comprises a low-naphthenic, thermotropic liquid crystalline polymer blended with a combination of flow modifiers is provided. More particularly, one of the flow modifiers is a hydroxy-functional compound that contains or more hydroxyl functional groups. Without intending to be limited by theory, it is believed that the hydroxyl functional groups can react with the polymer chain to shorten its length and thus reduce melt viscosity. Aromatic dicarboxylic acids are also employed as a flow modifier in the thermoplastic composition. Again, without intending to be limited by theory, it is believed that such acids can combine smaller chains of the polymer together after they have been cut by hydroxy-functional compounds. This helps maintain the mechanical properties of the composition even after its melt viscosity has been reduced.Type: GrantFiled: November 13, 2012Date of Patent: January 6, 2015Assignee: Ticona LLCInventors: Young Shin Kim, Xinyu Zhao
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Patent number: 8906259Abstract: A thermoplastic composition that comprises a naphthenic-rich, thermotropic liquid crystalline polymer blended with a flow modifier is provided. The flow modifier is an aromatic carboxylic acid that contains or more carboxyl functional groups. Without intending to be limited by theory, it is believed that the functional groups can react with the polymer chain to shorten its length and thus reduce melt viscosity. It is also believed that such acids can combine smaller chains of the polymer together after they have been cut during processing. This helps maintain the mechanical properties of the composition even after its melt viscosity has been reduced. As a result of the present invention, the melt viscosity of the thermoplastic composition is generally low enough so that it can readily flow into the cavity of a mold having small dimensions.Type: GrantFiled: November 13, 2012Date of Patent: December 9, 2014Assignee: Ticona LLCInventor: Young Shin Kim
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Publication number: 20140256862Abstract: Waterborne coatings are described having an acceptable balance of properties both during the storage of coating, application and drying. The period in which irregularities in a freshly applied coating can be repaired without resulting in brush marks is referred to as the open time. Aqueous coatings generally employ dispersed high molecular weight polymers as binders. These binders often provide short open times when the coating is dried since the dispersed polymer particles tend to be immobilized quickly in the edge region of an applied coating. As a result, the viscosity of the coating increases rapidly, which leads to a limited window of workability. The instant invention provides additives that are not volatile but that will extend the time that the film is malleable after after it is applied without interfering with other attributes, such as the resistance of the coating to freezing while in the can prior to application.Type: ApplicationFiled: March 10, 2013Publication date: September 11, 2014Inventors: Charles Francis Palmer, JR., Lester Arnold Haney, II, Calvin M. Wicker, JR.
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Publication number: 20140179845Abstract: Provided are compounds and processes of making compounds of the formula: wherein x=4 to 8, R is H, C1 to C4 alkyl, —C(O)OR1 or —OC(O)R1, y=4 to 8, R? is H, C1 to C4 alkyl, and at least one R? is —C(O)OR1 or —OC(O)R1, wherein R1 is a branched C4 to C14 alkyl, and their use in polymer compositions.Type: ApplicationFiled: December 21, 2012Publication date: June 26, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Jihad Mohammed Dakka, Edmund John Mozeleski, Lisa Saunders Baugh, Stephen Zushma
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Publication number: 20130122758Abstract: A thermoplastic composition for use in a fine pitch electrical connector is provided. The thermoplastic composition contains a liquid crystalline polymer and a plurality of fibers. The volume average length of the fibers in the thermoplastic composition is selectively controlled according to the present invention so that it is within a certain range, such as from about 80 to about 250 micrometers. The fibers also have a narrow length distribution. That is, at least about 70% by volume of the fibers have a length within a certain range. Through the use of a liquid crystalline polymer and fibers of a certain weight average length and narrow length distribution, the present inventors have discovered that the resulting thermoplastic composition is able to achieve a desirable combination of strength and flowability, which enables it to be uniquely suited for the walls of a fine pitch connector.Type: ApplicationFiled: November 13, 2012Publication date: May 16, 2013Applicant: TICONA LLCInventor: Ticona LLC
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Publication number: 20130046047Abstract: Disclosed is a saponified polymer-containing composition containing a saponified polymer (A), which is obtained by alkaline saponification of an ethylene-unsaturated carboxylic acid random copolymer, and a dimer acid (B).Type: ApplicationFiled: April 19, 2011Publication date: February 21, 2013Applicant: DU PONT-MITSUI POLYCHEMICALS CO., LTD.Inventors: Kenichi Date, Yoichi Shinya, Tadashi Kimura
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Publication number: 20120208118Abstract: Environmentally friendly resin particles are provided which include a monomer having a color, which is able to impart color to the resulting resin. The resulting resin may be used to form various articles, including toner. A toner of the present disclosure may thus include the bio-based polyester resin, optionally in combination with another amorphous resin and/or a crystalline resin. Methods for providing these resins are also provided.Type: ApplicationFiled: February 14, 2011Publication date: August 16, 2012Applicant: XEROX CORPORATIONInventor: Valerie M. Farrugia
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Publication number: 20110091771Abstract: This invention relates to a coating formulation, a coating formulation for manufacturing an electrode plate and an undercoating formulation, and their use. These coating formulations are all characterized by containing, in a polar solvent, a hydroxyl-containing resin and an organic acid and/or a derivative thereof. The hydroxyl-containing resin is at least one of (1) a polyvinyl acetal resin, (2) an ethylene-vinyl alcohol copolymer, (3) a modified and/or unmodified polyvinyl alcohol, and (4) a cyanoethyl-containing polymer. According to the present invention, there is provided a coating formulation capable of forming a coating of excellent adhesion and solvent resistance on a surface of a metal material such as an aluminum material.Type: ApplicationFiled: May 28, 2009Publication date: April 21, 2011Applicant: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Takanori Sannan, Shinya Tsuchida, Nobuyuki Kobayashi, Shinichiro Aoyagi
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Publication number: 20100152346Abstract: The present invention relates to plasticized polyolefin compositions comprising a polyolefin and a non-functionalized hydrocarbon plasticizer.Type: ApplicationFiled: January 25, 2010Publication date: June 17, 2010Inventors: Henry Wu-Hsiang Yang, Wen Li, Bruce R. Lundmark, Chon-Yie Lin, Chia Yung Cheng, Bryan R. Chapman, Petra Eiselt, Galina Ourieva, Manika Varma-Nair, James N. Coffey, Sandra Denise Schregenberger, David J. Lohse, Norman Yang, Jeffrey Theodore Zudock, Robert Jay Wittenbrink
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Publication number: 20100113655Abstract: There is provided high temperature flame retarded semiaromatic polyamides which provide superior properties in molded articles while maintaining high flow in the molding process. The resin compositions include, in addition to the polyamide and flame retardant, aromatic organic acid and at least one inorganic reinforcing agent and/or filler. Processes for their preparation and articles made from these compositions are also disclosed.Type: ApplicationFiled: October 21, 2009Publication date: May 6, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: Yuji Saga
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Patent number: 7585909Abstract: Disclosed herein are p-urea phenyl derivatives of the formula: wherein R1 and R2 are independently selected hydrocarbyl groups. These derivatives are useful as haze reducing agents in propylene polymers and copolymers.Type: GrantFiled: November 16, 2006Date of Patent: September 8, 2009Assignee: Chemtura CorporationInventors: Qinggao Ma, William A. Wortman, Abuzar Syed, Paul E. Stott, John M. Wefer, David J. Sikora
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Patent number: 7153895Abstract: Disclosed are methods for the formation of a rubber/filler/curative/plasticizer compacted masterbatch which may be performed in two ways. In one embodiment, a rubber and a filler are intimately mixed for a time and under shear conditions sufficient to form a free flowing associated composition, then the composition is mixed with a plasticizer and a curative to form the compacted masterbatch. Alternatively, the starting material may be an already-formed free flowing associated composition of rubber, filler and optional curative, which is mixed with a plasticizer and optional curative to form the compacted masterbatch.Type: GrantFiled: September 12, 2001Date of Patent: December 26, 2006Assignee: Uniroyal Chemical Company, Inc.Inventors: Joseph M. Hochheiser, Emmanuel G. Kontos, Richard W. Tomlinson
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Patent number: 6753365Abstract: A composition useful in the manufacturing of plastic cookware includes a polyetherimide resin and an acidic additive selected from the group consisting of aliphatic carboxylic acids having a vapor pressure less than one atmosphere at 300° C., aromatic carboxylic acids having a vapor pressure less than one atmosphere at 300° C., and combinations comprising at least one of the foregoing acidic additives. In one embodiment, the composition further comprises an additional resin, such as a polyester resin. The acidic additive is effective in improving the mold release and increasing the melt flow of the composition. Articles including the composition and a method for preparing the composition are also described.Type: GrantFiled: February 19, 2002Date of Patent: June 22, 2004Assignee: General Electric CompanyInventors: Sterling Bruce Brown, Jennifer L. David, Robert Russell Gallucci, Yimin Jin, Martin J. Lindway
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Patent number: 6703434Abstract: The present invention relates to methods of producing syndiotactic polypropylene articles through high performance nucleation via the presence of certain novel nucleating agents within molten syndiotactic resins, and subsequently permitting the resultant molten mixture to cool into a selected shape or configuration. Such novel nucleating agents are new classes of hyper-nucleators that promote crystallization within such target syndiotactic resins at levels well above any previously disclosed nucleators. This invention thus also encompasses the articles and compositions of such nucleated syndiotactic polypropylene as well.Type: GrantFiled: April 12, 2002Date of Patent: March 9, 2004Assignee: Milliken & CompanyInventor: Darin L. Dotson
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Patent number: 6642290Abstract: The present invention relates to methods of producing syndiotactic polypropylene articles through high performance nucleation via the presence of certain novel nucleating agents within molten syndiotactic resins, and subsequently permitting the resultant molten mixture to cool into a selected shape or configuration. Such novel nucleating agents are new classes of hyper-nucleators that promote crystallization within such target syndiotactic resins at levels well above any previously disclosed nucleators. This invention thus also encompasses the articles and compositions of such nucleated syndiotactic polypropylene as well.Type: GrantFiled: April 12, 2002Date of Patent: November 4, 2003Assignee: Milliken & CompanyInventor: Darin L. Dotson
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Publication number: 20030073764Abstract: Certain thermoplastic additives (combinations of clarifying and nucleating compounds) that induce simultaneously low clarity and high nucleation efficacy are provided. Such additives include combinations of certain bicyclic salts (which by themselves induce very high nucleation efficacy) and thermoplastic clarifying agents, including certain dibenzylidene sorbitol acetals and derivatives (hereinafter collectively referred to as “DBSs”)(which alone provide very low haze measurements and thus highly desirable clarity characteristics). In comparison, other types of standard thermoplastic nucleators, such as sodium benzoate and sodium 2,2′-methylene-bis-(4,6-di-tert-butylphenyl) phosphate provide relatively high peak crystallization temperatures, but do not combine synergistically with clarifiers, such as DBSs, to provide the same results as for the inventive combination of bicyclic salts and DBSs.Type: ApplicationFiled: August 11, 2001Publication date: April 17, 2003Inventor: Xiaodong Edward Zhao
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Patent number: 6359064Abstract: A process for forming an elastomeric polymer gel composition includes forming a blend by combining a poly(alkenyl-co-maleimide) that includes a maleimide and at least one monomer contributed unit derived from vinyl aromatic hydrocarbons, R1R2 ethylenes, and alkyl vinyl ethers; with a maleated polyalkylene. This is followed by addition of a crosslinking agent, which is allowed to react with the poly(alkenyl-co-maleimide) and maleated polyalkylene to form a polyalkyenyl grafted poly(alkenyl-co-maleimide). The polyalkenyl grafted poly(alkenyl-co-maleimide) is further blended with a polyester.Type: GrantFiled: September 8, 2000Date of Patent: March 19, 2002Assignee: Bridgestone CorporationInventors: Xiaorong Wang, James E. Hall
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Patent number: 6114424Abstract: The present invention relates to opalescent cosmetic compositions that are stable and suitable for topical application to human skin, and to methods for preparing and using such compositions. The compositions of the invention include (1) a hydrogenated indene-styrene-vinyltoluene polymer in an amount from about 0.1% by weight to about 50% by weight of the composition and (2) a carrier material in an amount from about 50% by weight to about 99.9% by weight of the composition. The opalescent composition may further contain a cosmetic material in an amount from about 0.5% by weight to about 20% by weight of the composition.Type: GrantFiled: January 29, 1998Date of Patent: September 5, 2000Assignee: Estee Lauder, Inc.Inventors: Konstantinos M. Lahanas, Daniela Toma, Gheorghe Cioca
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Patent number: 5993532Abstract: A stabilized solution of hydrogen silsesquioxane resin is disclosed. The solution comprises 100 parts by weight solvent, 0.1 to 100 parts by weight hydrogen silsesquioxane resin, and 0.002 to 4 parts by weight acid. These solutions are useful for forming coatings on substrates.Type: GrantFiled: November 26, 1997Date of Patent: November 30, 1999Assignees: Dow Corning Corporation, Dow Corning Toray Silicone Co., Ltd.Inventors: Dennis William Broderick, James Anthony Helwick, Takashi Nakamura
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Patent number: 5654354Abstract: A non-photoformable composition for use as the first unpatterned layer in a diffusion patterning process consisting essentially of:A. a film-forming solid organic polymer having no free acid groups containing a plurality of acid liable groups which are acid reactive;B. a plasticizer in which the solid organic polymer is incompletely soluble;C. volatile organic solvent, the ratio of polymer to plasticizer being such that when the volatile organic solvent is removed from the organic medium, the resulting solvent-free polymer/plasticizer dispersion is specularly nonreflective; andD. finely divided particles of dielectric solids.Type: GrantFiled: April 4, 1996Date of Patent: August 5, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventors: John James Felten, Walter Raymond Hertler, Sheau-Hwa Ma
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Patent number: 5373041Abstract: A pressure sensitive adhesive composition which can be applied by hot melt techniques to one surface and adhered to a second surface by contact at ambient temperature, to thereby bond the two surfaces together. The adhesive composition is made of certain ethylene/n-butyl acrylate copolymers together with tackifier and optionally, plasticizer.Type: GrantFiled: August 27, 1990Date of Patent: December 13, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: George W. Prejean
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Patent number: 5104912Abstract: An aqueous polymeric gel-forming composition which slowly crosslinks to form stable gels for plugging highly permeable zones in subterranean oil-bearing formations. The composition comprises an aqueous solution of a water-dispersible polymer present in a viscosifying amount and a crosslinking agent present in an amount effective to cause gelation of the polymeric solution which comprises a mixture of an aldehyde and a member selected from the group consisting of phenolic esters, naphtholic esters, halogenated phenolic esters and halogenated naphtholic esters.Type: GrantFiled: March 19, 1990Date of Patent: April 14, 1992Assignee: Mobil Oil CorporationInventor: Dennis H. Hoskin
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Patent number: 5070126Abstract: A film easily soluble in cold water comprises a water-soluble copolymer composed of 6 to 40 mol % of an allyl ester moiety and 94 to 60 mol % of a vinyl ester moiety and having a degree of sponification of not less than 65 mol %. The film is easily soluble in cold water and such solubility in cold water is not lowered even if it comes into contact with either alkaline or acidic materials and it can suitably used as wrapping material for packages which are directly thrown into water together with packed materials.Type: GrantFiled: December 21, 1990Date of Patent: December 3, 1991Assignee: Aicello Chemical Co., Ltd.Inventors: Shigekazu Toyonishi, Takashi Nakajima
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Patent number: 5063268Abstract: A composition suitable for use in producing tire treads, is provided. The composition comprises a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene; a rubber, such as, styrene-butadiene rubber, carbon black, and a plasticizer oil. Tires comprising treads made of the composition are also provided.Type: GrantFiled: June 8, 1990Date of Patent: November 5, 1991Assignee: Exxon Chemical Patents Inc.Inventor: Donald G. Young
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Patent number: 5026744Abstract: A nontacky, shock absorbing rubber composition suitable for replacing the natural clay used in horseshoe pits to absorb the energy of a thrown horseshoe, said composition comprising butyl rubber, crosslinked butyl rubber, cellulose fibre, particulate filler and plasticizer.Type: GrantFiled: January 17, 1989Date of Patent: June 25, 1991Assignee: Polysar LimitedInventor: Keith A. Callander
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Patent number: 4797440Abstract: A composition comprising a dispersion of a finely divided particulate solid in a thermoplastic polymeric organic medium in the presence of a lubricant and a processing additive in which the processing additive comprises an organic compound containing at least one group of the formula:--O--A--CO--wherein A is a divalent aliphatic radical containing 17 carbon atoms, at least 4 of which are directly between the oxygen atom and the carbonyl group.The composition is suitable for blending a particulate solid into a polymer.Type: GrantFiled: June 25, 1987Date of Patent: January 10, 1989Assignee: Imperial Chemical Industries PLCInventors: John D. Schofield, Roger Slater
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Patent number: 4788232Abstract: Resinous pigment concentrates comprising at least one pigment and a dispersing additive of a naphthenic extender oil and/or a phosphate ester blended with a major portion of a resinous polymer containing a significant proportion of at least one polymerized conjugated diene monomer, when used for coloring resinous polymers as described, are effective in reducing such defects in finished articles as gels and surface blemishes.Type: GrantFiled: October 23, 1987Date of Patent: November 29, 1988Assignee: Phillips Petroleum CompanyInventor: Donald G. Needham
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Patent number: 4761444Abstract: An elastomeric blend composition having improved tear properties and having a viscosity at 0.73 sec.sup.-1 and at 200.degree. C. of about 8.times.10.sup.3 to about 8.times.10.sup.5 poises, said composition formable into an elastomeric article, which comprises:(a) a neutralized sulfonated EPDM terpolymer having a viscosity at 0.73 sec.sup.-1 and at 200.degree. C. of about 5.times.10.sup.4 poises to about 5.times.10.sup.6 poises and about 10 to about 50 meq. sulfonate groups per 100 grams of said sulfonated EPDM terpolymer, said sulfonate groups being neutralized; and(b) about 2 to about 60 parts by weight of a fluorohydrocarbon elastomer per 100 parts of such sulfonated EPDM terpolymer.Type: GrantFiled: June 9, 1986Date of Patent: August 2, 1988Assignee: Exxon Research and Engineering CompanyInventors: Pawan K. Agarwal, William M. Petrik, Richard T. Garner
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Patent number: 4720514Abstract: Resinous pigment concentrates comprising at least one pigment and a dispersing additive of a naphthenic extender oil and/or a phosphate ester blended with a major portion of a resinous polymer containing a significant proportion of at least one polymerized conjugated diene monomer, when used for coloring resinous polymers as described, are effective in reducing such defects in finished articles as gels and surface blemishes.Type: GrantFiled: February 13, 1986Date of Patent: January 19, 1988Assignee: Phillips Petroleum CompanyInventor: Donald G. Needham
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Patent number: 4699975Abstract: A readily crystallizable arylenesulfide resin composition is produced by adding, to 100 parts by weight of an arylenesulfide polymer, 0.01 to 10.0 parts of an organic acid or organic acid anhydride having a high boiling or melting point such as 2,6-naphthalene dicarboxylic acid, and then heating the mixture to a temperature not lower than the melting point of the polymer. The resulting resin composition is characterized in that its crystallization from its glass state and molten state is very rapid, in that it forms very fine spherulite structures, and in that it has a high degree of crystallization, a very crystallizable character, and other desirable characteristics.Type: GrantFiled: March 5, 1986Date of Patent: October 13, 1987Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Takayuki Katto, Yukio Ichikawa
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Patent number: 4600736Abstract: Resinous pigment concentrates comprising at least one pigment and a dispersing additive of a naphthenic extender oil and/or a phosphate ester blended with a major portion of a resinous polymer containing a significant proportion of at least one polymerized conjugated diene monomer, when used for coloring resinous polymers as described, are effective in reducing such defects in finished articles as gels and surface blemishes.Type: GrantFiled: March 11, 1985Date of Patent: July 15, 1986Assignee: Phillips Petroleum CompanyInventor: Donald G. Needham
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Patent number: 4568728Abstract: A foundry binder for preparing shaped foundry products, said binder having improved breakdown, which binder comprises:(a) a resin component organic resin alkyd resins, furan resins, shell phenolic resins or acid setting phenolic resin and(b) a catalystic amount of a metal drier.Type: GrantFiled: July 16, 1984Date of Patent: February 4, 1986Assignee: Delta Resins & RefractoriesInventors: Jordan J. Kopac, Arek Khachaturian
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Patent number: 4412030Abstract: Resins suitable for adhesives are based on .alpha.-methyl styrene, styrene and phenol in certain percentages, viz. 25 to 63, 35 to 73 and 2 to 15 percent by weight, respectively.Combinations of resin, ethylene vinyl acetate copolymer, atactic polypropylene, ethyl acrylate copolymer or a thermoelastomer and optionally a wax or tackifying oil yield excellent adhesives, in particular hot-melt adhesives.Type: GrantFiled: April 30, 1982Date of Patent: October 25, 1983Assignee: National Starch and Chemical CorporationInventors: Yves Runavot, Georges Billault, Jaques Salvetat
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Patent number: 4379867Abstract: A writing medium capable of being erased by merely mechanically rubbing with an ordinary pencil eraser after writing and capable of forming a drawing line possessing high adhering strength onto the surface of paper even immediately after writing on the paper. The writing medium contains a pigment as a colorant, a polynorbornane and/or trans-1,4-polyisoprene, and a mixture solvent solution for dissolving the polynorbornane and the trans-1,4-polyisoprene and containing a low boiling point organic solvent having a boiling point of less than 180.degree. C. and a high vaporization rate and operating as a plasticizer for the polynorbornane and the trans-1,4-polyisoprene and a high boiling point organic solvent having a boiling point of higher than 300.degree. C. and a low vaporization rate. Thus, a drawing line written with the writing medium can be erased merely by rubbing with the eraser within several hours after writing, and is not erased thereafter.Type: GrantFiled: August 6, 1981Date of Patent: April 12, 1983Inventor: Tsunoda Noriaki
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Patent number: 4377650Abstract: Pigment is finely dispersed in hydrolyzed ethylene-vinyl acetate copolymer by subjecting the copolymer to which pigment has previously been added by simple, non-intensive mixing to solution hydrolysis and/or by adding pigment to the solution hydrolysis medium prior to or during hydrolysis of the copolymer therein.Type: GrantFiled: October 31, 1980Date of Patent: March 22, 1983Assignee: National Distillers & Chemical Corp.Inventor: Joseph Fischer
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Patent number: 4374224Abstract: Propagation of electrical trees and water trees in electrical insulation made of ethylene homopolymers or copolymers with an unsaturated monomer is inhibited by the addition to the insulating composition of an organic carboxylic ester having at least one aromatic ring and at least three carboxylic ester groups, the ester being liquid at the operating temperature of the electrical equipment in which the insulation is used. The main utility of the inhibitors of this invention is in the primary insulation for power transmission cables, especially those used in high voltage applications.Type: GrantFiled: September 14, 1981Date of Patent: February 15, 1983Assignee: E. I. Du Pont de Nemours and CompanyInventors: John K. Beasley, Edward J. Urban
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Patent number: 4360638Abstract: This invention is directed to compositions useful as ionomeric hot melt pressure sensitive adhesive compositions. These compositions comprise a polymer containing carboxylic acid, a miscible metal salt, and an o-methoxy-substituted aryl acid. These compositions display low melt viscosity, simplifyingapplication, as well as improved adhesive properties, especially shear resistance.Type: GrantFiled: January 13, 1982Date of Patent: November 23, 1982Assignee: Rohm and Haas CompanyInventor: Benjamin Bartman
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Patent number: 4357459Abstract: Resins suitable for adhesives are based on .alpha.-methyl styrene, styrene and phenol in certain percentages, viz. 25 to 63, 35 to 73 and 2 to 15 percent by weight, respectively,Combinations of resin, ethylene vinyl acetate copolymer or thermoelastomer and optionally a wax or tackifying oil yield excellent adhesives, in particular hot-melt adhesives.Type: GrantFiled: August 25, 1980Date of Patent: November 2, 1982Assignee: National Starch and Chemical CorporationInventors: Yves Runavot, Georges Billault, Jacques Salvetat
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Patent number: RE31874Abstract: Propagation of electrical trees and water trees in electrical insulation made of ethylene homopolymers or copolymers with an unsaturated monomer is inhibited by the addition to the insulating composition of an organic carboxylic ester having at least one aromatic ring and at least three carboxylic ester groups, the ester being liquid at the operating temperature of the electrical equipment in which the insulation is used. The main utility of the inhibitors of this invention is in the primary insulation for power transmission cables, especially those used in high voltage applications.Type: GrantFiled: November 2, 1983Date of Patent: April 30, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventors: John K. Beasley, Edward J. Urban