Patents Represented by Attorney Harvey L. Cohen
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Patent number: 4650832Abstract: In a process for the continuous halogenation of polymers by contacting polymer and halogenating agent in a continuous flow device in which means are provided for disengaging reaction by-products and unreacted halogenating agent from the reaction mixture, by deforming and disrupting the halogenated polymer surface and injecting an inert and/or reactive gas into the halogenated polymers immediately after reaction thereby neutralizing the product. In a preferred embodiment the process is carried out in an extruder-reactor and an optional, supplementary inert and/or reactive gas scrubbing zone is included. The process is amenable to saturated and unsaturated polymers.Type: GrantFiled: October 17, 1985Date of Patent: March 17, 1987Assignee: Exxon Research & Engineering Co.Inventors: Ronald C. Kowalski, William M. Davis, Neil F. Newman, Zisis A. Foroulis, Francis P. Baldwin
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Patent number: 4593062Abstract: Thermoplastic compositions useful as molded parts including automotive hoses and exterior body parts which exhibit good flow and good surface characteristics in injection molded parts. The compositions comprise equal proportions of a polyolefin, a halogenated butyl rubber and polychloroprene wherein the rubbers have been dynamically vulcanized to a fully cured state in the presence of the polyolefin.Type: GrantFiled: December 10, 1984Date of Patent: June 3, 1986Assignee: Exxon Research & Engineering Co.Inventors: Robert C. Puydak, Donald R. Hazelton
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Patent number: 4554326Abstract: In a process for the continuous halogenation of polymers by contacting polymer and halogenating agent in a continuous flow device in which the polymer and halogenating agent are subjected to deformation during reaction and in which means are provided for disengaging reaction by-products and unreacted halogenating agent from the reaction mixture, a significant process improvement is realized by injecting an inert gas into the halogenated polymers immediately after reaction in order to neutralize the product. In a preferred embodiment the process is carried out in an extruder-reactor and an optional, supplementary inert gas scrubbing zone is included. The process is amenable to saturated and unsaturated polymers.Type: GrantFiled: April 1, 1983Date of Patent: November 19, 1985Assignee: Exxon Research & Engineering Co.Inventors: Ronald C. Kowalski, William M. Davis, Neil F. Newman, Z. Andrew Foroulis, Francis P. Baldwin
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Patent number: 4548995Abstract: In a process for the continuous halogenation of polymers by contacting polymer and halogenating agent in a continuous flow device in which means are provided for disengaging reaction by-products and unreacted halogenating agent from the reaction mixture, by deforming and disrupting the halogenated polymer surface and injecting an inert gas into the halogenated polymers immediately after reaction thereby neutralizing the product. In a preferred embodiment the process is carried out in an extruder-reactor and an optional, supplementary inert gas scrubbing zone is included. The process is amenable to saturated and unsaturated polymers.Type: GrantFiled: September 17, 1984Date of Patent: October 22, 1985Assignee: Exxon Research & Engineering Co.Inventors: Ronald C. Kowalski, William M. Davis, Neil F. Newman, Z. Andrew Foroulis, Francis P. Baldwin
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Patent number: 4513116Abstract: Continuous halogenation of polymers is achieved by contacting polymer and halogenating agent in a continuous flow device in which the reactants are present as either co-continuous phases or wherein the halogenating agent is present as a continuous phase and the polymer is present as a discontinuous phase, the polymer is subjected to deformation during reaction and in which means are provided for disengaging reaction by-products and unreacted halogenating agent from the reaction mixture. In a preferred embodiment the polymer passes through three extruder-reactor zones under controlled conditions to achieve halogenation: feed, reaction (preferably vented), neutralization, and optionally a wash and exit zone. A continuous halogenating agent phase is achieved during reaction by avoiding complete filling of the reaction zone with polymer. Various halogenated polymers are produced, for example, halogenated linear low density polyethylene and halogenated butyl rubber.Type: GrantFiled: April 1, 1983Date of Patent: April 23, 1985Assignee: Exxon Research and Engineering Co.Inventors: Ronald C. Kowalski, William M. Davis, Neil F. Newman, Lewis Erwin
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Patent number: 4508592Abstract: Extrusion drying of wet rubber crumb particles in the last phase of the overall elastomer drying process is improved through use of gas injected into the compression zone of an extruder thereby providing an improved efficiency in the explosion drying process. Rubber particles having a very low moisture content, such as less than 0.2% by weight, frequently less than 0.1%, are produced.Type: GrantFiled: December 7, 1982Date of Patent: April 2, 1985Assignee: Exxon Research & Engineering Co.Inventor: Ronald C. Kowalski
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Patent number: 4501859Abstract: Continuous halogenation of polymers is achieved in an extruder-reactor employing reactants, conditions and design features directed to maximizing mixing and contact of the polymer with the halogenating agent and neutralizing agent while simultaneously minimizing side reactions and polymer degradation. The polymer passes through three extruder-reactor zones under controlled conditions to achieve halogenation: feed, reaction, neutralization, and optionally a wash and exit zone. Various halogenated polymers are produced, for example, halogenated linear low density polyethylene and halogenated butyl rubber.Type: GrantFiled: April 1, 1983Date of Patent: February 26, 1985Assignee: Exxon Research & Engineering Co.Inventors: Neil F. Newman, Ronald C. Kowalski
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Patent number: 4474924Abstract: Polymerization slurries of elastomeric isoolefin homopolymers and copolymers, such as butyl rubber, in diluents such as methyl chloride are effectively stabilized against agglomeration of polymer particles through addition of minor proportions of an hydrogenated preformed copolymer stabilizer having both a lyophobic and a lyophilic portion. The chemical and structural nature of the lyophobic and lyophilic portions which comprise the copolymer stabilizer are significant in determining the extent and method of hydrogenation for production of the most effective stabilizer. Agglomeration of polymer products is effectively prevented, yielding a number of significant processing advantages. The process is especially adaptable to the production of isobutylene-isoprene butyl rubber.Type: GrantFiled: January 27, 1983Date of Patent: October 2, 1984Assignee: Exxon Research & Engineering Co.Inventors: Kenneth W. Powers, Hsien C. Wang
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Patent number: 4358560Abstract: Polymerization slurries of elastomeric isoolefin homopolymers and copolymers, such as butyl rubber, in diluents such as methyl chloride are effectively stabilized against agglomeration of polymer particles through addition of minor proportions of (i) a preformed copolymer stabilizer having both a lyophobic or lyophilic portion, or (ii) an in situ formed stabilizer from a functional lyophilic stabilizer precursor capable of copolymerizing or otherwise chemically bonding with the polymer product. Agglomeration of polymer products is effectively prevented, yielding a number of significant processing advantages. The process is especially adaptable to the production of isobutylene-isoprene butyl rubber.Type: GrantFiled: February 23, 1981Date of Patent: November 9, 1982Assignee: Exxon Research & Engineering Co.Inventors: Kenneth W. Powers, Ralph H. Schatz
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Patent number: 4340694Abstract: There are disclosed monofunctional and polyfunctional aliphatic oxycarbonylsulfenyl chlorides having general utility as crosslinking, coupling and chemical modification agents for olefin containing polymers, particularly unsaturated rubber hydrocarbon elastomers.Type: GrantFiled: November 21, 1979Date of Patent: July 20, 1982Assignee: Exxon Research & Engineering Co.Inventors: Stanley J. Brois, Gary Ver Strate
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Patent number: 4319061Abstract: Terminally-functional saturated hydrocarbon low molecular weight liquid polymers are prepared by cationic polymerization of a 1-alkene containing at least one tertiary or phenyl substituted carbon in the presence of a transfer agent containing a benzylic or tertiary halogen and at least one primary or secondary halogen wherein the 1-alkene is capable of being polymerized by a Friedel Crafts catalyst.Type: GrantFiled: January 5, 1981Date of Patent: March 9, 1982Assignee: Exxon Research and Engineering Co.Inventors: Gary Ver Strate, Francis P. Baldwin
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Patent number: 4303571Abstract: There are disclosed film-forming polymer blends useful for the production of tubular blown film comprising EPM or EPDM elastomers, ethylene-vinyl acetate copolymers and a hydrocarbon oil plasticizer. The films exhibit resiliency and elasticity and high melt flow properties.Type: GrantFiled: January 17, 1980Date of Patent: December 1, 1981Assignee: Exxon Research & Engineering Co.Inventors: Deborah S. Jansen, Robert C. Puydak
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Patent number: 4288575Abstract: A heterogeneous catalytic process for dehydrohalogenating allylically halogenated olefinic hydrocarbon polymers to produce conjugated diene unsaturated polymeric products is disclosed comprising employing certain metal containing catalyst compositions, especially activated alumina supported copper containing catalysts. The process is especially suitable for the preparation of conjugated diene butyl elastomers from halogenated butyl rubber and produces products having relatively high reactivity levels in terms of active diene content.Type: GrantFiled: September 17, 1979Date of Patent: September 8, 1981Assignee: Exxon Research & Engineering Co.Inventor: Irwin J. Gardner
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Patent number: 4278822Abstract: Terminally-functional saturated hydrocarbon low molecular weight liquid polymers are prepared by cationic polymerization of a 1-alkene containing at least one tertiary or phenyl substituted carbon in the presence of a transfer agent containing a benzylic or tertiary halogen and at least one primary or secondary halogen wherein the 1-alkene is capable of being polymerized by a Friedel Crafts catalyst.Type: GrantFiled: November 7, 1977Date of Patent: July 14, 1981Assignee: Exxon Research & Engineering Co.Inventors: Gary Ver Strate, Francis P. Baldwin
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Patent number: 4254240Abstract: A solution of butyl rubber in an inert solution such as n-hexane is halogenated in a continuous process using bromine chloride vapor and high intensity mixing means for both the halogenation and subsequent neutralization steps. Adjustment of the mole ratio of bromine chloride to isoprene, where an isobutylene-isoprene butyl copolymer is used, to less than about 1.5 to 1 prevents overhalogenation and significant molecular weight loss, while the use of bromine chloride vapor results in improved process safety.The doubly halogenated product, containing both bromine and chlorine in its structure can be vulcanized in the absence of sulfur, e.g., with zinc oxide. It is particularly useful in rubber compositions where the singly halogenated product is employed, but demonstrates product performance advantages compared to both brominated butyl rubber and chlorinated butyl rubber.Type: GrantFiled: September 10, 1979Date of Patent: March 3, 1981Assignee: Exxon Research & Engineering Co.Inventors: Neil F. Newman, Robert Roper, Roger K. West
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Patent number: 4244861Abstract: An injection-moldable, peroxide crosslinkable elastomeric composition comprises a mixture of a crystalline interpolymer comprising ethylene and propylene; a low density polyethylene; one or more multifunctional vinylic or allylic monomers; a medium to high structure form of carbon; and an organic peroxide.The composition is particularly useful for the fabrication of injection molded structures which are required to flex on impact and return to their original shape when the distorting force is released. Typical structures are automotive fender extensions, grilles and front and rear fascia.Type: GrantFiled: February 23, 1979Date of Patent: January 13, 1981Assignee: Exxon Research & Engineering Co.Inventors: Lawrence Spenadel, Ilan Duvdevani, Edward N. Kresge
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Patent number: 4230837Abstract: There are disclosed monofunctional and polyfunctional aliphatic oxycarbonylsulfenyl chlorides having general utility as crosslinking, coupling and chemical modification agents for olefin containing polymers, particularly unsaturated rubber hydrocarbon elastomers.Type: GrantFiled: February 2, 1978Date of Patent: October 28, 1980Assignee: Exxon Research & Engineering Co.Inventors: Stanley J. Brois, Gary Ver Strate
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Patent number: 4195133Abstract: High impact strength rubber modified styrene and styrene-acrylonitrile (SAN) thermoplastics are prepared by incorporating into the styrene or SAN copolymer a conjugated diene butyl rubber elastomer. Conventional processes are effective to provide products having suitable impact strength and related properties.Type: GrantFiled: November 28, 1978Date of Patent: March 25, 1980Assignee: Exxon Research & Engineering Co.Inventor: Raymond F. Murphy
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Patent number: 4170664Abstract: A process for the production of cross-linked resilient automotive body components having a cured surface coating from a thermoplastic elastomeric composition substantially free from added vulcanizing or free-radical inducing agents comprises: Fabricating an uncured component from said composition; applying to the component a radiation-curable surface coating; and simultaneously curing the surface coating and cross-linking the composition comprising the fabricated component by exposing the coated component to high-energy ionizing radiation.Type: GrantFiled: July 13, 1978Date of Patent: October 9, 1979Assignee: Exxon Research & Engineering Co.Inventors: Lawrence Spenadel, S. Alexander Banks
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Patent number: 4145492Abstract: A heterogeneous catalytic process for dehydrohalogenating allylically halogenated olefinic hydrocarbon polymers to produce conjugated diene unsaturated polymeric products is disclosed comprising employing certain metal containing catalyst compositions, especially activated alumina supported copper containing catalysts. The process is especially suitable for the preparation of conjugated diene butyl elastomers from halogenated butyl rubber and produces products having relatively high reactivity levels in terms of active diene content.Type: GrantFiled: March 7, 1977Date of Patent: March 20, 1979Assignee: Exxon Research & Engineering Co.Inventor: Irwin J. Gardner