Treating In The Presence Of Elemental Halogen Patents (Class 525/356)
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Patent number: 5616656Abstract: The present invention provides a new method for making an improved flame-retardant additive comprising a brominated syndiotactic styrenic polymer. The method includes the steps of providing a source of syndiotactic styrenic polymer; providing a source of inert reaction medium that is not capable of dissolving to any appreciable degree the syndiotactic styrenic polymer at ambient temperature and pressure; providing a source of brominating agent; providing a source of Lewis acid catalyst; mixing the syndiotactic styrenic polymer with the inert reaction medium and the Lewis acid catalyst; and reacting the syndiotactic styrenic polymer with the brominating agent to produce a brominated syndiotactic styrenic polymer.Type: GrantFiled: April 6, 1995Date of Patent: April 1, 1997Assignee: Ferro CorporationInventors: James L. Dever, James C. Gill
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Patent number: 5569723Abstract: C.sub.4 -C.sub.16 alkyl rubbers are brominated by reacting the alkyl rubbers with bromine in the presence of organic azo compounds and/or alkali metal and/or alkaline earth metal hypochlorites and in the presence of linear, branched and/or cyclic alkanes and water at temperatures of 10.degree. to 100.degree. C., optionally under pressure, wherein the quantity of bromine is 0.2 to 1.2 times the molar quantity of double bonds contained in the rubber, 0.1 to 3 times the molar quantity of hypochlorite and/or azo compounds is used relative to the quantity of bromine used, providing that the concentration of the hypochlorites in an aqueous solution is 2 to 20 wt. %, and wherein 5 to 20 wt. % of water, 60 to 90 wt. % of alkanes and 5 to 25 wt. % of alkyl rubber are used relative to 100 wt. % of the total of alkyl rubber, alkanes and water.Type: GrantFiled: October 13, 1995Date of Patent: October 29, 1996Assignee: Bayer AktiengesellschaftInventors: Wolfgang Baade, Heinrich K onigshofen, Gabor Kaszas
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Patent number: 5548029Abstract: Graft copolymers which are isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R' can be hydrogen, alkyl, and the primary and secondary alkyl halides, "a" ranges from about 14 to about 70,000, "b" ranges from 0 to about 70,000, "c" ranges from 0 to about 70,000, "d" ranges from about 1 to about 70,000, X is a halogen, and Nu is a nucleophilic residue provided by a polymeric nucleophile.Type: GrantFiled: March 15, 1995Date of Patent: August 20, 1996Assignee: Exxon Chemical Patents Inc.Inventors: Kenneth W. Powers, Hsien-Chang Wang, T-C. Chung, Anthony J. Dias, Joseph A. Olkusz
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Patent number: 5548023Abstract: A method of compatibilizing a blend of at least a hydrocarbon polymer with at least one other polymer which is incompatible with the hydrocarbon polymer, said method comprising adding to the polymer blend a compatibilizer which is an isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R' can be hydrogen, alkyl, and the primary and secondary alkyl halides, "a" ranges from about 14 to about 70,000, "b" ranges from 0 to about 70,000, "c" ranges from 0 to about 70,000, "d" ranges from about 1 to about 70,000, X is a halogen, and Nu is a nucleophilic residue provided by a polymeric nucleophile.Type: GrantFiled: March 13, 1995Date of Patent: August 20, 1996Assignee: Exxon Chemical Patents, Inc.Inventors: Kenneth W. Powers, Hsien-Chang Wang, T-C. Chung, Anthony J. Dias, Joseph A. Olkusz
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Patent number: 5539059Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.Type: GrantFiled: June 6, 1995Date of Patent: July 23, 1996Assignee: Exfluor Research CorporationInventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
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Patent number: 5525679Abstract: Chlorinated and chlorosulfonated polyethylenes are produced by chlorinating substantially linear olefin polymers having a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63, a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2)-4.63, a critical shear rate at onset of gross melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear olefin polymer having about the same I.sub.2 and Mw/Mn and at least about 0.01 long chain branches/1000 carbons and a molecular weight distribution from about 1.5 to about 2.5 and their method of manufacture are disclosed. The chlorosulfonated polyethylenes are produced by treating the chlorinated polyethylenes with a mixture of gaseous chlorine and sulfur dioxide.Type: GrantFiled: July 25, 1994Date of Patent: June 11, 1996Assignee: The Dow Chemical CompanyInventors: Lawrence J. Effler, Jr., Mark T. Berard, George D. Wright
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Patent number: 5506283Abstract: Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles.Type: GrantFiled: November 23, 1994Date of Patent: April 9, 1996Assignee: Composite Particles, Inc.Inventors: Edwin L. McInnis, Bernard D. Bauman, Mark A. Williams
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Patent number: 5504173Abstract: Process for preparing the (E)-isomer of a compound (II) by contacting the (E) or (Z) isomer of the 2-methylphenyl precursor, or a mixture of both, with bromine in an organic solvent, in the presence of a polymeric base and light.Type: GrantFiled: February 9, 1995Date of Patent: April 2, 1996Assignee: Zeneca LimitedInventors: Alfred G. Williams, Nicholas R. Foster
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Patent number: 5473024Abstract: The invention relates to chlorinated hydroxyrubber, a method for making chlorinated hydroxyrubber via chlorinating partially hydroxylated rubber with chlorine gas, and environmentally friendly low volatile organic content coatings comprising chlorinated hydroxyrubber.Type: GrantFiled: October 5, 1993Date of Patent: December 5, 1995Assignee: University of Southern MississippiInventors: Shelby F. Thames, Zhiqiang A. He
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Patent number: 5466757Abstract: A chlorinated ethylene-propylene copolymer having a chlorine content of 20 to 45% by weight and a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 150 is produced by chlorinating in two or three stages, by contact with chlorine gas in an aqueous suspension, an ethylene-propylene copolymer having a propylene content of 15 to 40% by weight, a melt flow index of 0.01 to 5.0 g/10 minutes, a melting peak as measured by differential scan calorimeter (DSC) of 80.degree. C. or more, a crystallinity as measured by X-rays of 3% or more, an index M.sub.W /M.sub.N of the distribution of molecular wieght, determined by gel permeation chromatography (GPC), of greater than 4, and a Mooney visocisty (ML.sub.1+4, 100.degree. C.) of 10 to 180.Type: GrantFiled: December 11, 1991Date of Patent: November 14, 1995Assignee: Showa Denko Kabushiki KaishaInventors: Naotoshi Watanabe, Tsuyoshi Masukawa, Kenji Ozaki, Noboru Moriwaki
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Patent number: 5461117Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.Type: GrantFiled: June 13, 1994Date of Patent: October 24, 1995Assignee: Exfluor Research CorporationInventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
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Patent number: 5426164Abstract: A polymer has at least one photoactive site and more than one perfluorocyclobutane group. New monomers containing photoactive sites or photoactive precursors and at least one perfluorovinyl group are useful for making such polymers. Processes of making such polymers and the monomers from which they are made are disclosed. The polymers are useful in coatings, photoresists, and the like.Type: GrantFiled: December 24, 1992Date of Patent: June 20, 1995Assignee: The Dow Chemical CompanyInventors: David A. Babb, W. Frank Richey, Katherine S. Clement, Eric S. Moyer, Marius W. Sorenson
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Patent number: 5422404Abstract: A method for producing a modified gum by direct fluorination of a polymer gum. The polymer gum must be substantially uncross-linked prior to fluorination. The degree of fluorination is controlled to provide fluorinated gums having different degrees of fluorine uptake and available cross-linking sites. The resulting modified gum can be cured alone or in combination with one or more supplemental polymers to form a wide variety of elastomeric articles. Additives, such as fillers, lubricants and plasticizers may also be combined with the modified gum and added polymers during compounding and final curing.Type: GrantFiled: August 20, 1993Date of Patent: June 6, 1995Assignee: PolyMod Technologies, Inc.Inventors: Ronald E. Zielinsky, Mark J. Seabury
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Patent number: 5382635Abstract: Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles.Type: GrantFiled: September 29, 1993Date of Patent: January 17, 1995Assignee: Composite Particles, Inc.Inventors: Edwin L. McInnis, Robert P. Scharff, Bernard D. Bauman, Mark A. Williams
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Patent number: 5378766Abstract: A novel process for the preparation of a chlorinated polyolefin having excellent low temperature characteristics and brightness is provided which comprises allowing a polyolefin dissolved or suspended in a solvent to undergo chlorination reaction with chlorine gas or chlorinated sulfuryl in the presence of a radical initiator as a catalyst, characterized in that as said solvent there is used 1,1,2-trichloroethane and the temperature is controlled to 90.degree. C. or lower at the process for removing hydrogen chloride and/or sulfur dioxide by-produced during the reaction from the reaction system.Type: GrantFiled: November 24, 1993Date of Patent: January 3, 1995Assignee: Tosoh CorporationInventors: Nobuyuki Ito, Katsushige Okayama, Toshinori Karasuda, Yasumichi Miyagawa
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Patent number: 5362817Abstract: A process for preparing linear block and three arm star block copolymers having blocks of polyisobutylene and blocks of anionically polymerizable monomers comprises mixing a first solution of a polyisobutylene having a number average molecular weight of from about 4,000 to about 60,000 and having from 1 to 3 terminal allylic halogens with a second solution of a living alkali metal terminated polymer having a number average molecular weight of from about 4,000 to about 60,000 in relative proportions at a temperature of from about 10.degree. C. to about 80.degree. C. for a period of time of from about 30 minutes to about 24 hours whereby a significant amount of linear block or three arm star block copolymer is formed. A polyisobutylene having from 1 to 3 terminal allylic halogens is provided and a process for preparing said polyisobutylene.Type: GrantFiled: August 18, 1993Date of Patent: November 8, 1994Assignee: Polysar Rubber CorporationInventor: Akhtar Osman
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Patent number: 5359011Abstract: A novel process has been found in which effectively and completely neutralizes chlorinated polyvinyl chloride resin. The process comprises neutralizing the chlorinated polyvinyl chloride resin by a weak non-gassing base. The weak non-gassing base has a pKa less than 7.0 and is not a carbonate. The resulting chlorinated polyvinyl chloride polymer is stable and does not degrade.Type: GrantFiled: October 14, 1992Date of Patent: October 25, 1994Assignee: The B.F. Goodrich CompanyInventors: Robert G. Vielhaber, Raymond W. Ballman, Jr.
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Patent number: 5350809Abstract: Disclosed herein is a process for the preparation of a chlorinated rubber, wherein chlorine gas is caused to act on a polyisoprene rubber to prepare the chlorinated rubber. Chlorine gas is blown into a high-acidity aqueous dispersion of the polyisoprene rubber to chlorinate the polyisoprene rubber, whereby a chlorinated isoprene rubber with high performance is prepared stably in an aqueous medium.Type: GrantFiled: January 22, 1993Date of Patent: September 27, 1994Assignee: Asahi Denka Kogyo K.K.Inventors: Hiroshi Tsuchiya, Makoto Kokura, Yutaka Ozawa, Takaaki Sugimura
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Patent number: 5340879Abstract: The invention relates to polymer resins which are dispersible or soluble in water, wherein the resin is an amorphous, chlorinated, chemically modified copolymer or terpolymer prepared from polyethylene, polybutene and/or polypropylene and having an amorphous polypropylene content of at least 50% by weight, an average molecular weight Mw of 10,000 to 100,000 g/mol, a non-uniformity of 1.0 to 6.5, a chlorine content of 2.5 to 50% by weight, an anionic or cationic salt group content of 5 to 250 milliequivalents per 100 g of polymer resin and a content of polyoxyalkylene units of 0 to 40% by weight, the proportion of oxyethylene units being at least 30% by weight of the oxyalkylene units.Type: GrantFiled: March 12, 1993Date of Patent: August 23, 1994Assignees: Bayer Aktiengesellschaft, Bayer Antwerpen N.V.Inventors: Raymond Audenaert, Stephan Kirchmeyer, Kirkor Sirinyan, Wolfgang Henning
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Patent number: 5340880Abstract: A novel chlorinated poly(vinyl chloride) ("CPVC") resin is prepared by a two-step process which uses an organic peroxide catalyst rather than a source of actinic light. The novel two-step "photoless" process yields a CPVC ("two-step CPVC") which, even at 72% Cl, is easily fusible at 170.degree. C. It is now possible to extrude and injection mold parts with exceptional heat distortion properties attributable to the higher Cl content of the resin. The key distinguishing characteristic over a CPVC made in the presence of a distinct liquid chlorine phase, which CPVC is the most closely comparable CPVC, is when lines are drawn connecting points for measured T.sub.g s as a function of Cl content, for each type of CPVC. The slope of a line for two-step CPVC is about 15% less than the slope of a line for CPVC produced by a process in which excess chlorine is present as a distinct liquid phase.Type: GrantFiled: March 29, 1993Date of Patent: August 23, 1994Assignee: The B.F. Goodrich CompanyInventors: Arthur L. Backman, Bernard F. Cinadr
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Patent number: 5332790Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.Type: GrantFiled: March 8, 1993Date of Patent: July 26, 1994Assignee: Exfluor Research CorporationInventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
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Patent number: 5322903Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.Type: GrantFiled: January 17, 1992Date of Patent: June 21, 1994Assignee: Exfluor Research CorporationInventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
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Patent number: 5322904Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.Type: GrantFiled: March 8, 1993Date of Patent: June 21, 1994Assignee: Exfluor Research CorporationInventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
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Patent number: 5321092Abstract: A method for bleaching hydrocarbon tackifier resins which comprises adding a bleaching agent to a molten resin and recovering a bleached hydrocarbon tackifier resin. The bleaching agent comprises from about 0.04 wt.% to about 0.06 wt.%, based on the weight of the reaction mixture, of an iodine supplying compound and from about 2.0 wt.% to about 10.0 wt.%, based on the weight of the reaction mixture, of an activating terpene compound. The iodine supplying compound is selected from the group consisting of elemental iodine and hydrogen iodide. The activating compound is selected from the group consisting of .alpha.-terpinene, .gamma.-terpinene, d-limonene, 1,4-cyclohexadiene and abietic acid.Type: GrantFiled: May 17, 1991Date of Patent: June 14, 1994Assignee: Arizona Chemical CompanyInventor: Theodore J. Williams
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Patent number: 5314968Abstract: A polyhalide bactericidal resin, of the demand type, based on halogens, the preponderant being iodine. The release of iodine into the water which is purified is minimized, and contaminated water is rendered safe for human consumption.There are also provided devices for the decontamination of contaminated water, based on the use of the novel resins of the invention.Furthermore there is provided a process for the production of such resins based on the interaction of a strong base anion exchange resin, iodine, an iodine, a bromide and a persulfate oxidizing agent.Type: GrantFiled: February 25, 1993Date of Patent: May 24, 1994Inventors: Moshe A. Frommer, Israel Dalven
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Patent number: 5306782Abstract: A surface-modified fibrillated fiber composition is disclosed herein which comprises polyacrylonitrile homopolymer or copolymer and a surface of pendant N-haloamide groups. Also disclosed is a process for the production of said composition.Type: GrantFiled: August 16, 1993Date of Patent: April 26, 1994Assignee: American Cyanamid CompanyInventors: Laurence W. Chang, Larry S. Anderson, David A. Ley
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Patent number: 5306740Abstract: Brominated chlorine-substituted poly-1,3-butadiene is produced by a process in which an aqueous chlorine-substituted poly-1,3-butadiene latex is reacted in aqueous phase with a brominating agent in the presence of a radical-forming catalyst and/or in the presence of light at a pH value below 7 and at a temperature of 20.degree. to 95.degree. C., the brominated reaction product is optionally precipitated from the aqueous dispersion obtained and then separated from the aqueous liquid.Type: GrantFiled: April 12, 1993Date of Patent: April 26, 1994Assignee: Bayer AktiengesellschaftInventors: Hans J. Laas, Heinz W. Lucas, Klaus Nachtkamp, Heinrich Konigshofen
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Patent number: 5296513Abstract: Disclosed is a process for producing dental polymeric shaped articles resistant to the adhesion of plaque which comprises the steps of shaping and curing a dental composition containing a monomer having at least one (meth)acryloyloxy group, and bringing the cured product into contact with a halogen or a halogen compound. Also disclosed is a dental composition comprising a monomer having at least one (meth)acryloyloxy group and a polymerization initiator, which is characterized by having added thereto at least one of a halogen and a halogen compound. When cured, this dental composition produces dental polymeric shaped articles resistant to the adhesion of plaque.Type: GrantFiled: July 20, 1992Date of Patent: March 22, 1994Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Hitoshi Ige, Nobuhiro Mukai, Naoto Ohsuga
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Patent number: 5292813Abstract: This invention relates to novel compositions of matter, fullerene graft amine-containing polymers, and the process of making them. The graft is made by reacting a fullerene with a primary or secondary amine-containing polymer, preferably a hydrocarbon containing polymer in effective amounts, typically from about 10:1 to about 1:10 mole ratio of reactive amine in polymer to fullerene for a time and under conditions effective to produce the compositions. Suitable starting polymers are those containing primary or secondary amino groups, e.g., EPDM amine, PIB-amine, PIBSA-PAM, and Mannich based polymers. The preferred polymers are oil soluble, as the novel compositions of that type may be used as viscosity modifiers and lube additives. The crosslinked compositions may be used in essentially any application as the original polymer, but in which an increase in tensile strength would be desired.Type: GrantFiled: October 2, 1992Date of Patent: March 8, 1994Assignee: Exxon Research & Engineering Co.Inventors: Abhimanyu O. Patil, George W. Schriver, Robert D. Lundberg
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Patent number: 5290879Abstract: A process for producing a chlorinated polyolefin is disclosed, which comprises dissolving or suspending a polyolefin in a solvent and conducting chlorination reaction of the dissolved or suspended polyolefin, said solvent being a chloroform-based solvent comprising a mixture of 100 parts by weight of chloroform containing no alcohol and from 0.0005 to 15 parts by weight of a compound having from 4 to 10 carbon atoms and containing one or more double bonds per molecule. A process for producing a chlorosulfonated polyolefin is also disclosed, which comprises dissolving or suspending a polyolefin in a solvent and conducting chlorination and chlorosulfonation reaction of the dissolved or suspended polyolefin, said solvent being a chloroform-based solvent comprising a mixture of 100 parts by weight of chloroform containing no alcohol and from 0.0005 to 15 parts by weight of a compound having from 4 to 10 carbon atoms and containing one or more double bonds per molecule.Type: GrantFiled: December 30, 1992Date of Patent: March 1, 1994Assignee: Tosoh CorporationInventors: Yoshiaki Ishida, Katsushige Okayama
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Patent number: 5286804Abstract: A process for halogenating star-branched butyl rubber is provided wherein water and a wetting agent or wetting agent precursor are added to a solution comprising the star-branched butyl rubber, solid particles of branching agent and an organic solvent prior to the neutralization step to increase the rate of neutralization of the hydrogen halide by-product of the halogenation reaction.Type: GrantFiled: September 17, 1991Date of Patent: February 15, 1994Assignee: Exxon Chemical Patents Inc.Inventors: Kenneth W. Powers, Hsien C. Wang, Robert N. Webb, James V. Fusco, Hans F. Vanbrackle, Michael F. McDonald, Jr.
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Patent number: 5274039Abstract: The present invention relates to a coating composition which contains a one- or two-component binder and, in addition, an adhesion promoter which is based on a chemically modified, amorphous polyolefin having an average molecular weight M.sub.w (weight average) in the range from 10,000 to 100,000 g/mol, a non-uniformity U.sub.n of 1.0 to 6.5, a chlorine content of about 2.5 to 50% by weight and a total content of nitrogen, oxygen, sulfur and silicon, in the form of chemically incorporated functional groups, of about 2.5 to 15.0% by weight.The present invention also relates to a process for coating plastic substrates with this coating composition and to the coated plastic substrates obtained in accordance with this process.Type: GrantFiled: July 23, 1992Date of Patent: December 28, 1993Assignees: Bayer Aktiengesellschaft, Miles Inc.Inventors: Kirkor Sirinyan, Reinhold Dederichs, John L. Williams
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Patent number: 5274049Abstract: A method of reducing the static and dynamic coefficients of friction and improving the wear life of thermoset elastomeric articles is disclosed. The elastomeric articles are fluorinated in the presence of a hydrogen fluoride scavenger under conditions sufficient to reduce said friction coefficient and improve said wear life, without promoting degradation of the tensile properties of the articles.Type: GrantFiled: July 19, 1991Date of Patent: December 28, 1993Assignee: William S. ShambanInventors: Ronald E. Zielinski, Mark J. Seabury
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Patent number: 5271923Abstract: A safe and effective solid radiographic contrast medium which comprises an iodine-substituted aromatic polymer with an iodine content of 1 to 75% by weight and which is free of side effects on the digestive system such as constipation as found in barium preparations and which has no risk of causing iodine shocks as found in aqueous iodine preparations containing meglumine sodium amidotrizoate.Type: GrantFiled: January 29, 1992Date of Patent: December 21, 1993Assignee: Manac IncorporatedInventors: Hiromi Kochi, Junro Amano, Takashi Nishiyama, Shin-ichi Tashiro
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Patent number: 5252320Abstract: PVP-HI-I.sub.2 complexes having a partition coefficient above 300 were prepared by oxidizing a PVP-HI intermediate in air and light at room temperature. These complex products were light in color, water soluble and stable.Type: GrantFiled: April 20, 1990Date of Patent: October 12, 1993Assignee: ISP Investments Inc.Inventor: John J. Merianos
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Patent number: 5246778Abstract: A hose composition is provided which comprises a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene, fillers, rubber compounding additives and a curing agent. A hose comprising at least a portion made from this hose composition is also provided.Type: GrantFiled: August 17, 1992Date of Patent: September 21, 1993Assignee: Exxon Chemical Patents Inc.Inventors: Bernard J. Costemalle, Robert C. Keller, Donald F. Kruse, James V. Fusco, Marcel A. Steurs
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Patent number: 5242985Abstract: What is described herein is a PVP-I.sub.2 composition comprising strongly swellable, lightly crosslinked PVP complex to iodine, wherein said composition is capable of releasing free iodine slowly with time in the presence of water. Preferably the complex has about 10-15% by weight available iodine and about 4-8 weight % iodide, and is a free-flowing, fine, lightly yellow powder.Type: GrantFiled: June 17, 1992Date of Patent: September 7, 1993Assignee: ISP Investments Inc.Inventors: Jenn S. Shih, John J. Merianos
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Patent number: 5242987Abstract: Olefin polymers of melt index 1-500 g/10 minutes are chlorinated or chlorosulfonated in perfluorinated alkane, perfluorinated ether, or perfluorinated tertiary amine suspension.Type: GrantFiled: January 29, 1993Date of Patent: September 7, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edward G. Brugel
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Patent number: 5242988Abstract: Polymer agglomeration is prevented in chlorinations and chlorosulfonations of olefin polymers performed in perfluorinated media by addition of fluorinated surfactants.Type: GrantFiled: February 5, 1993Date of Patent: September 7, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edward G. Brugel
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Patent number: 5220087Abstract: A fluorinated cation exchange resin catalyst is prepared by contacting a polymer containing pendant acid groups, particularly the radical --SO.sub.3 X with elemental fluorine in the presence of a water-free halogenated hydrocarbon liquid and thereafter converting the resulting pendant --SO.sub.3 X radical to a free acid.Type: GrantFiled: December 13, 1991Date of Patent: June 15, 1993Assignee: Allied-Signal Inc.Inventors: Morris B. Berenbaum, Thomas P. J. Izod, Donald R. Taylor, John D. Hewes
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Patent number: 5218058Abstract: The present invention deals with flexible elastic polyurethane films, efficaciously having a thickness from 0.3 to 3 mm, prepared by sintering powdered thermoplastic polyurethanes, having:(a) a melt index of from 50 to 350, measured at 190.degree. C. with a compression force of 21.6 kg, and(b) a Shore A hardness of from 80 to 98, preferably while using from 0.05 to 1 part by weight of powdered aluminum oxide and/or silica gel per 100 parts by weight of said thermoplastic polyurethane, utilizing a heated mold.The polyurethane films are preferably used for coating molded articles used in the interior of motor vehicles.Type: GrantFiled: May 23, 1990Date of Patent: June 8, 1993Assignee: BASF AktiengesellschaftInventors: Gerhard Zeitler, Gerhard Lehr
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Patent number: 5214107Abstract: Monochloromonofluorobenzene provides a reaction medium for chlorination of C.sub.2 -C.sub.8 olefin polymers which is inert to chlorination and does not function as a stratospheric ozone depleter.Type: GrantFiled: August 3, 1992Date of Patent: May 25, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edward G. Brugel
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Patent number: 5214102Abstract: A method of producing fluorinated elastomeric articles having reduced coefficients of friction, improved wear life and improved resistance to fluid permeability. A thermoplastic elastomeric article is exposed to gaseous fluorine in a reactor vessel under reaction conditions sufficient to create a fluorinated material on the external portions of the elastomeric article, which fluorinated material extends inwardly into the matrix of the article, without promoting degradation of the tensile properties of the article.Type: GrantFiled: December 5, 1991Date of Patent: May 25, 1993Assignee: William S. ShambanInventors: Ronald E. Zielinski, Mark J. Seabury
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Patent number: 5206305Abstract: Chlorinated ethylene-.alpha.-olefin copolymer rubber of the present invention is characterized in that the content of chlorine bonded to primary carbon atom is 0.6 % by weight or more and the content of chlorine bonded to tertiary carbon atom is 1.6 % by weight or less. This chlorinated ethylene-.alpha.-olefin copolymer rubber has a high vulcanization speed and excels in heat resistance. Additionally, this thermoplastic elastomer composition consisting of this vulcanizate and crystalline polyolefin resin particularly excels in moldability and processibility.Type: GrantFiled: April 17, 1991Date of Patent: April 27, 1993Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tetsuo Tojo, Keiji Okada, Yoshiharu Kikuchi, Yasuhiko Otawa, Toshiyuki Maeda, Katsuo Okamoto
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Patent number: 5200470Abstract: High Tg polymers prepared by metathesis ring-opening polymerization of N-aryl norbornene dicarboximide and one or more other norbornene derivative monomers, wherein said N-aryl group is substituted with a halo, cyano, alkyl or halogenated alkyl substituting group which is ortho or meta to the imide nitrogen. Preferred polymers with exceptionally high Tg are prepared from N-ortho substituted phenyl norbornene dicarboximide monomer. Mixtures of N-ortho substituted phenyl norbornene dicarboximide and N-meta substituted phenyl norbornene dicarboximide can exhibit eutectic melting points which facilitates melt polymerization.Type: GrantFiled: December 18, 1991Date of Patent: April 6, 1993Assignee: Monsanto CompanyInventor: Jawed Asrar
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Patent number: 5194512Abstract: A composition is disclosed herein which comprises a core of a polyacrylonitrile homopolymer or copolymer and a surface of N-haloamides. Also disclosed is a process for the production of said composition.Type: GrantFiled: July 1, 1991Date of Patent: March 16, 1993Assignee: American Cyanamid CompanyInventors: Laurence Wu-Kwang Chang, Larry S. Anderson, David A. Ley
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Patent number: 5162445Abstract: A copolymer of a C.sub.4 to C.sub.7 isoolefin and a para-alkylstyrene is provided as well as the corresponding halogenated, functionalized and grafted derivatives thereof. Processes for producing these copolymers are also provided.Type: GrantFiled: November 27, 1989Date of Patent: November 10, 1992Assignee: Exxon Chemical Patents Inc.Inventors: Kenneth W. Powers, Hsien-Chang Wang, T-C Chung, Anthony J. Dias, Joseph A. Olkusz
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Patent number: 5155282Abstract: New perfluoropolyethers comprising repeating units chosen from among ##STR1## statistically distributed along the chain, having a controlled molecular weight and brominated end groups, prepared starting from the product of the photochemical oxidation of C.sub.2 F.sub.4, and/or C.sub.3 F.sub.6, containing peroxidic oxygen, and subsequent treatment in liquid phase with bromine, at temperatures ranging from -40.degree. to 130.degree. C. in the presence of ultraviolet radiations, said new perfluoropolyethers derivatives being useful as additives in rubber mixes vulcanizable with peroxides, in amounts of 0.01 to 5 parts by w per 100 parts by weight of elastomer, optionally in combination with non brominated perfluoropolyethers, to improve the processability in the extrusion and the detachability of the vulcanized articles from the molding.Type: GrantFiled: October 30, 1990Date of Patent: October 13, 1992Assignees: Ausimont S.p.A., Montedison S.p.A.Inventors: Giuseppe Marchionni, Gian T. Viola, Giulio Tommasi, Raffaele Ferro, Gianna Cirillo
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Patent number: 5149744Abstract: A process for the direct fluorination of polymeric resins in which polymeric material capable of being fluorinated is contacted with elemental fluorine and a dense carrier fluid having a critical temperature higher than ambient temperature, a boiling point lower than ambient temperature minus 60 celcius degrees, and a molecular weight greater than the molecular weight of elemental fluorine. The dense carrier fluid preferably has a molecular weight in the range of about 40 to about 200.Type: GrantFiled: June 28, 1990Date of Patent: September 22, 1992Assignee: Liquid Carbonic Inc.Inventor: Gregorio Tarancon
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Patent number: H1475Abstract: A process for halogenating copolymers of an isoolefin having from 4 to 7 carbon atoms and a para-alkylstyrene in the melt phase is provided in which the halogenation reaction is performed in a continuous flow device, such as an extruder-reactor. Halogenated copolymers produced by the process are also provided.Type: GrantFiled: July 2, 1990Date of Patent: August 1, 1995Inventors: Neil F. Newman, Donald A. White, Lawrence W. Flatley, William M. Davis