Abstract: A thermoplastic composition which may be unvulcanized or vulcanized is provided which comprises a polymer blend of an elastomeric thermoplastic engineering resin and a halogen-containing copolymer of a C4 to C7 isomonoolefin and a para-alkylstyrene. A process for preparing a dynamically vulcanized composition is also provided.
Type:
Grant
Filed:
November 2, 1999
Date of Patent:
February 12, 2002
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Narayanaswami Raja Dharmarajan, Robert Chester Puydak, Hsien Chang Wang, Kenneth William Powers, Thomas Chen-Chi Yu, Donald Ross Hazelton
Abstract: The invention relates to impact modifiers for polyamide compositions which improve the impact strength of the polyamides without adversely affecting the flexural modulus of the composition. The impact modifiers comprise blends of halogenated copolymers of a C4 to C7 isomonoolefin and an alkyl/styrene with a polyolefin.
Type:
Grant
Filed:
June 7, 1993
Date of Patent:
October 16, 2001
Assignee:
Exxon Mobil Chemical Patents Inc.
Inventors:
Thomas Chen-chi Yu, Kenneth William Powers, Hsien Chang Wang
Abstract: A compatibilized blend of general purpose rubbers (GPR) and polymers containing benzylic halide groups are produced through solventless reactions utilizing a multifunctional agent containing a diene reactive group and a benzylic halo reactive group.
Abstract: Disclosed are hot melt adhesives comprising ethylene/alpha-olefin copolymers prepared with either supported or unsupported metallocene-alumoxane catalysts for applications in hot melt adhesives used in automotive product assembly, packaging and food packaging. These ethylene copolymers have weight average molecular weight ranging from about 20,000 to about 100,000 and comonomer weight percent ranging from about 6 to about 30. The hot melt adhesive composition includes the ethylene copolymer and a compatible tackifier at a ratio of tackifier to copolymer of from 70:30 to 30:70 and may also include up to 30 weight percent of a paraffinic and microcrystalline wax of the copolymer and tackifier.
Type:
Grant
Filed:
September 2, 1998
Date of Patent:
March 27, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Mun Fu Tse, Aspy Keki Mehta, Vince Leo Hughes
Abstract: Vulcanized rubber parts suitable to dampen vibrations generated by mechanical devices are disclosed. The parts are based on a cured composition comprising one or a mixture of a diolefin polymers, e.g., natural rubber, a halogenated copolymer of a C4 to C7 isomonoolefin, e.g., isobutylene, and a para-alkylstyrene, filler and a curing system. The vulcanized parts exhibit improved aging and high temperature resistance and reduced deterioration of dynamic properties after long term exposure to high temperatures.
Type:
Grant
Filed:
December 4, 1998
Date of Patent:
March 6, 2001
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Shinichiro Yamashita, Kenneth Odell McElrath, Jr.
Abstract: A solid nucleophilic reagent for the conversion of benzylic halogen functionality on polymers to other functionalities, and methods of making and using the same.
Type:
Grant
Filed:
July 21, 1997
Date of Patent:
December 5, 2000
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Chia S. Chee, Hsien-Chang Wang, Kenneth William Powers
Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process.
Type:
Grant
Filed:
July 13, 1995
Date of Patent:
October 31, 2000
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Agapios Kyriacos Agapiou, Chi-I Kuo, Michael Elroy Muhle, Anthony Nicholas Speca
Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process.
Type:
Grant
Filed:
July 30, 1996
Date of Patent:
September 12, 2000
Assignee:
Exxon Chemical Patents Inc
Inventors:
Agapios Kyriacos Agapiou, Chi-I Kuo, Michael Elroy Muhle, Anthony Nicholas Speca
Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky ligand transition metal catalyst which when utilized in a polymerication process substantially reduces the reactor fouling and sheeting in a gas, slurry or liquid pool polymerization process.
Type:
Grant
Filed:
July 30, 1996
Date of Patent:
September 5, 2000
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Anthony Nicholas Speca, Jeffrey Lawrence Brinen
Abstract: Toughened nanocomposite materials are prepared based on a blend of one or more thermoplastic engineering resins, e.g., nylon, a functionalized, e.g. brominated, copolymer of a C.sub.4 -C.sub.7 isomonoolefin, e.g. isobutylene, and a para-alkylstyrene, e.g. para-methylstyrene, and further contain a uniformly dispersed exfoliated phyllosilicate layered clay, e.g., montmorillonite. The nanocomposite materials exhibit superior mechanical properties, including enhanced impact strength.
Type:
Grant
Filed:
May 20, 1997
Date of Patent:
May 9, 2000
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Dongming Li, Dennis George Peiffer, Chester W. Elspass, Hsien-Chang Wang
Abstract: The invention provides for curable compositions containing a halogenated copolymer of a C.sub.4 to C.sub.7 isomonoolefin, e.g., isobutylene and a para-alkylstyrene, e.g., para-methylstyrene, and further containing an effective amount of a metal salt, e.g. zinc, of an unsaturated carboxylic acid, e.g. methacrylic acid, as a curing agent. The composition also contains an organic peroxide as a co-curative and one or a mixture of saturated polymer blend components which are co-curable with the halogenated copolymer. The curable composition may further comprise EPDM.
Type:
Grant
Filed:
November 4, 1998
Date of Patent:
April 18, 2000
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Kenneth Odell McElrath, Hsien-Chang Wang
Abstract: A composition, suitable for use in producing a tire carcass, 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 a blend of natural rubber and a copolymer of styrene and butadiene; carbon black, and a plasticizer oil. Tires comprising carcasses made of the composition are also provided.
Abstract: There is provided a method of introducing ethylenically unsaturated functionality, into an alkylstyrene homopolymer or copolymer with an isoolefin, at the alkylbenzyl carbon atom comprising the steps of: forming a solution of the polymer in a hydrocarbon solvent; adding to the polymer solution an alkali metal (Na, K, Rb, Cs) alkoxide and an alkyl lithium compound to form a solution of a metalated intermediate; and adding a halodialkylalkenyl silane to the metalated polymer solution. Also provided are the ethylenically unsaturated functionalized polymer derivatives made by the method, and the crosslinked derivatives thereof.
Type:
Grant
Filed:
December 23, 1996
Date of Patent:
January 4, 2000
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Jean M. J. Frechet, Shah A. Haque, Hsien-Chang Wang
Abstract: A cationic catalyst composition comprising a reactive cation and a compatible non-coordinating anion used at a temperature of 20.degree. C. or less to produce olefin polymers, particularly polyisobutylene is disclosed.
Abstract: Styrene/acrylonitrile (SAN) resin compositions are provided having both improved room temperature impact properties as well as good weatherability. The compositions comprise a mixture of SAN resin, an elastomeric halogenated copolymer comprising a C.sub.2 to C.sub.12 monoolefin, e.g. isobutylene, and a ring-substituted alklstyrene, e.g., para-methylstyrene, and a compatibilizing agent such as zinc stearate.
Type:
Grant
Filed:
November 26, 1996
Date of Patent:
December 28, 1999
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Hsien-Chang Wang, Richard Cheng-Ming Yeh
Abstract: A process for producing a copolymer of isoolefin having between 4 and 7 carbon atoms and para-alkylstyrene is provided. The process comprises admixing the isoolefin and the para-alkylstyrene in a copolymerization reactor under copolymerization conditions in the presence of a diluent, and a Lewis Acid catalyst, and maintaining the copolymerization reactor substantially free of impurities which can complex with the catalyst or copolymerize with the isoolefin or the para-alkylstyrene.
Type:
Grant
Filed:
February 13, 1997
Date of Patent:
September 28, 1999
Assignee:
Exxon Chemical Patents Inc
Inventors:
Kenneth William Powers, Hsien-Chang Wang
Abstract: This invention relates to elastomeric composition and a process for producing said compositions. The elastomeric composition of this invention contains the reaction product of one or more elastomer(s) containing functional groups reactive with isocyanate, one or more polyisocyanate compound(s), and one or more co-reactant compound(s) containing functional groups reactive with isocyanates.
Type:
Grant
Filed:
June 2, 1997
Date of Patent:
June 15, 1999
Inventors:
Avinash Chandrakant Gadkari, Gerard Marie Vanhaeren
Abstract: Vulcanized rubber parts suitable to dampen vibrations generated by mechanical devices are disclosed. The parts are based on a cured composition comprising one or a mixture of a diolefin polymers, e.g., natural rubber, a halogenated copolymer of a C.sub.4 to C.sub.7 isomonoolefin, e.g., isobutylene, and a para-alkylstyrene, filler and a curing system. The vulcanized parts exhibit improved aging and high temperature resistance and reduced deterioration of dynamic properties after long term exposure to high temperatures.
Type:
Grant
Filed:
July 19, 1996
Date of Patent:
May 18, 1999
Assignee:
Exxon Chemical Patents, Inc.
Inventors:
Yamashita Shinichiro, Kenneth Odell McElrath, Jr.
Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Cs, K, Na alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to said base polymer solution also provided are the metalated copolymers and the functionalized derivative therefrom.
Type:
Grant
Filed:
June 5, 1997
Date of Patent:
December 15, 1998
Assignees:
Exxon Chemical Patents Inc, Cornell Research Foundation, Inc
Inventors:
Jean M. J. Frechet, Shah A. Haque, Joachim Hans Georg Steinke, Hsien-Chang Wang
Abstract: A composition suitable for coating fabrics is provided. The composition comprises a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene; a filler; a processing aid, and a curing agent. A fabric coated with the composition is also provided.
Type:
Grant
Filed:
January 11, 1994
Date of Patent:
November 7, 2000
Assignee:
Exxon Chemical Patents Inc.
Inventors:
James Vincent Fusco, Donald Frederick Kruse, Irwin Jerome Gardner