Patents by Inventor Donald R. Kelsey

Donald R. Kelsey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5578686
    Abstract: A phenolic allyl ether is provided which can be prepared by reacting a polyphenol with an allyl halide, said polyphenol described by the formula ##STR1## in which Ar is an aromatic moiety, L is a divalent cyclohexanenorbomane linking moiety, L' is a divalent cycloaliphatic moiety, Allyl is a phenolic allyl ether group, and each of m and n is a number within the range of 0 to about 10. Such phenolic allyl ethers include the reaction product of allyl halide with the product of the addition reaction of a phenol and a cyclohexenenorbornene compound such as 5-(3-cyelohexen-1-yl)bicyclo[2.2.1]hept-2-ene. The resulting phenolic allyl ether resins are useful as processing agents for polymaleimides.
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: November 26, 1996
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, Donald R. Kelsey
  • Patent number: 5527973
    Abstract: A process is described for purifying a carbonyl-containing 1,3-propanediol composition, the process comprising:(a) forming a solution of said 1,3-propanediol composition in an acidic aqueous medium;(b) adding a sufficient amount of a base to the aqueous medium to form a basic solution having a pH greater than 7;(c) heating the basic solution under conditions effective to distill a major portion of the water therefrom; and(d) heating the remaining basic solution under conditions effective to distill a major portion of the PDO therefrom, to provide a 1,3-propanediol composition having a lower carbonyl content than the starting carbonyl-containing 1,3-propanediol composition.The process of the invention provides a purified 1,3-propanediol which can be used as a starting material for a low-color polyester.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: June 18, 1996
    Inventor: Donald R. Kelsey
  • Patent number: 5495051
    Abstract: A phenolic allyl ether is provided which can be prepared by reacting a polyphenol with an allyl halide, said polyphenol described by the formula ##STR1## in which Ar is an aromatic moiety, L is a divalent cyclohexanenorbornane linking moiety, L' is a divalent cycloaliphatic moiety, Allyl is a phenolic allyl ether group, and each of m and n is a number within the range of 0 to about 10. Such phenolic allyl ethers include the reaction product of allyl halide with the product of the addition reaction of a phenol and a cyclohexenenorbornene compound such as 5-(3-cyclohexen-1-yl)bicyclo[2.2.1]hept-2-ene. The resulting phenolic allyl ether resins are useful as processing agents for polymaleimides.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: February 27, 1996
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, Donald R. Kelsey
  • Patent number: 5459229
    Abstract: A process for preparing a 1,3-propanediol-based polyester comprises contacting an aqueous stream containing acrolein byproduct with a base for a time effective to reduce the acrolein content of the aqueous stream. In a specific embodiment, a poly(propylene terephthalate) preparation process comprises the steps of:(a) contacting 1,3-propanediol and terephthalic acid at elevated temperature to produce a reaction product mixture comprising a poly(propylene terephthalate) and an aqueous solution comprising acrolein;(b) removing a major portion of the aqueous solution from said reaction product mixture;(c) adding a sufficient quantity of a base to the aqueous solution to form a basic solution having a pH greater than about 7.5 and maintaining the basic solution for a time effective to lower the acrolein content thereof;(d) optionally, diluting the basic solution with water; and(e) optionally, biotreating the dilute basic solution for a time effective to further lower the acrolein content.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: October 17, 1995
    Assignee: Shell Oil Company
    Inventors: Donald R. Kelsey, Charles C.-S. Chou
  • Patent number: 5459213
    Abstract: A catalyst system and process for the polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst system contains a transition metal hydrotrispyrazolylborate complex having the formula:Tp--M--L.sub.3wherein Tp is a hydrotrispyrazolylborate ligand, M is tungsten or molybdenum, and L is independently a ligand selected from the group consisting of oxo, phenoxy, alkoxy, and halides, provided that at least one L is a halide, and a co-catalyst.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: October 17, 1995
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5405924
    Abstract: An olefin metathesis catalyst system and process for the metathesis polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst system comprises the reaction product of:(a) an imido transition metal halide complex of formula: ##STR1## wherein Ar is C.sub.6-20 aryl, preferably phenyl; M is a transition metal selected from the second and third rows of Groups 5, 6, 7 and 8 of the Periodic Table (IUPAC 1989 convention) and including for example niobium, tantalum, molybdenum, tungsten, rhenium, ruthenium or osmium, preferably tungsten or molybdenum; R is independently halide, C.sub.1-20 alkyl, C.sub.1-12 alkoxy, C.sub.1-12 haloalkyl, C.sub.6-20 aryl, C.sub.6-20 aryloxy, cyano or combinations thereof; L is independently a complexing ligand selected from carbonyl, C.sub.1-12 alkoxy, C.sub.1-12 haloalkoxy, C.sub.1-12 alkyl ethers, including mono-, di- and higher ethers, C.sub.12 alkylnitriles, C.sub.5-20 pyridines, C.sub.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: April 11, 1995
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5406003
    Abstract: A phenolic compound is provided which can be described by the formula ##STR1## in which Ar is a C.sub.6-20 aromatic moiety, L is a cyclohexanenorbornane linking moiety, L' is a divalent cycloaliphatic moiety, and each of m and n is a number within the range of 0 to about 10. Such phenols include the product of the addition reaction of phenol with a cyclohexenenorbornene compound such as 5-(3-cyclohexen-1-yl)bicyclo[2.2.1 ]hept-2-ene.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: April 11, 1995
    Assignee: Shell Oil Company
    Inventors: Pen C. Wang, Donald R. Kelsey
  • Patent number: 5382713
    Abstract: A phenolic compound is provided which can be described by the formula ##STR1## in which Ar is a C.sub.6-20 aromatic moiety, L is a cyclohexanenorbornane linking moiety, L' is a divalent cycloaliphatic moiety, and each of m and n is a number within the range of 0 to about 10. Such phenols include the product of the addition reaction of phenol with a cyclohexenenorbornene compound such as 5-(3-cyclohexen-1-yl)bicyclo[2.2.1]hept-2-ene.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: January 17, 1995
    Assignee: Shell Oil Company
    Inventors: Pen C. Wang, Donald R. Kelsey
  • Patent number: 5369195
    Abstract: A catalyst and process for the polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst includes a transition metal compound, a co-catalyst and a boron halide promoter. Polymerization can be carried out in a reaction injection molding process to prepare a thermoset molded article having high Tg and superior flexural strength.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: November 29, 1994
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5359023
    Abstract: An epoxy resin is provided which can be described by the formula ##STR1## in which Ar is an aromatic moiety, L is a divalent cyclohexanen or bornane linking moiety, L' is a divalent cycloaliphatic moiety, Gly is a glycidyl ether group, and each of m and n is a number within the range of 0 to about 10. Such epoxy resins include the product of glycidation of the product of the addition reaction of a phenol and a cyclohexenenorbornene compound such as 5-(3-cyclohexen-1-yl)bicyclo[2.2.1]hept-2-ene. The resulting epoxy resins have low melt viscosity and low water absorbance in the cured state and are useful as the resinous component of high-performance electrical laminating and encapsulation formulations.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: October 25, 1994
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, Donald R. Kelsey
  • Patent number: 5340912
    Abstract: A cyanate-functional compound is provided which can be described by the formula ##STR1## in which Ar is a C.sub.6-20 aromatic moiety, L is a hexanenorbornane linking moiety, L' is a divalent cycloaliphatic moiety, and each of m and n is a number within the range of 0 to about 10. Such cyanate esters include the product of cyanation of the addition reaction of a phenol with a cyclohexene norbornene compound such as 5-(3-cyclohexen-1-yl)bicyclo[2.2.1]hept-2-ene. The resulting cyanate esters have low melt viscosity and low water absorbance in the cured state and are useful as the resinous component of high-performance electrical laminating and encapsulation formulations.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: August 23, 1994
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, Donald R. Kelsey
  • Patent number: 5316994
    Abstract: An improved olefin metathesis catalyst system is disclosed. The catalyst system comprises a transition metal halide metathesis catalyst and an organo transition metal hydride co-catalyst of the formulaR.sub.x '--Cu--HThe copper hydride co-catalyst of this invention has the general formula R.sub.x '--Cu--H wherein R' is a complexing ligand preferably an organically substituted phosphine, and x is 1 or 2. The organic substituents on the phosphine group are optionally substituted C.sub.1-20 hydrocarbons, such as C.sub.1-20 alkyls or alkenyls, C.sub.3-20 cycloalkyls or cycloalkenyls having 3 to 8 carbon atoms in the ring, or optionally substituted C.sub.6-20 aryl or fused aryl. The optional substituents on the hydrocarbons include halogens, preferably chloride and fluoride; C.sub.1-6 alkyl; C.sub.1-6 alkenyl; or C.sub.1-6 alkoxy.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: May 31, 1994
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5312794
    Abstract: A catalyst system and process for the polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst system contains a transition metal hydrotrispyrazolylborate complex having the formula:Tp--M--L.sub.3wherein Tp is a hydrotrispyrazolylborate ligand, M is tungsten or molybdenum, and L is independently a ligand selected from the group consisting of oxo, phenoxy, alkoxy, and halides, provided that at least one L is a halide, and a co-catalyst.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: May 17, 1994
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5284929
    Abstract: An epoxy resin is provided which can be described by the formula ##STR1## in which Ar is an aromatic moiety, L is a divalent cyclohexanenorbornane linking moiety, L' is a divalent cycloaliphatic moiety, Gly is a glycidyl ether group, and each of m and n is a number within the range of 0 to about 10. Such epoxy resins include the product of glycidation of the product of the addition reaction of a phenol and a cyclohexenenorbornene compound such as 5-(3-cyclohexen-1-yl)bicyclo[2.2.1]hept-2-ene. The resulting epoxy resins have low melt viscosity and low water absorbance in the cured state and are useful as the resinous component of high-performance electrical laminating and encapsulation formulations.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: February 8, 1994
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, Donald R. Kelsey
  • Patent number: 5278305
    Abstract: A catalyst and process for the polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst comprises the reaction product of a transition metal halide and a 1,4-hydroquinone of the general formula: ##STR1## wherein R is independently selected from the group of hydrogen, C.sub.1-12 alkyl, C.sub.6-20 aryl, halide, and C.sub.1-6 haloalkyl. Optional co-catalysts include borohydrides, organo tin hydrides and organo aluminum compounds. Polymerization can be carried out in a reaction injection molding process to prepare a molded article.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: January 11, 1994
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5276119
    Abstract: An improved olefin metathesis catalyst system is disclosed. The catalyst system comprises a transition metal halide metathesis catalyst and an organo transition metal hydride co-catalyst of the formulaL.sub.x --M--Hwherein M is a group IVB transition metal including zirconium, titanium or hafnium; L is a ligand selected independently from the group of hydrogen, halide and organic ligands such as an optionally substituted C.sub.1-20 alkyl or alkenyl, an optionally substituted C.sub.3-20 cycloalkyl or cycloalkenyl having 3 to 6 carbon atoms in the ring, an optionally substituted C.sub.5-20 cycloakadienyl having 5 carbon atoms in the cycloalkadienyl ring, or an optionally substituted C.sub.6-20 aryl or fused aryl, where at least one L is a cycloalkadienyl; and x is one less than the valence of M. The optional substitutions on the organic ligands include halogens, preferably chloride or flouride; C.sub.1-6 alkyl; C.sub.1-6 alkoxy; and C.sub.1-6 haloalkyl. The preferred ligand is a C.sub.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: January 4, 1994
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5276118
    Abstract: A catalyst and process for the metathesis polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst comprises the reaction product of a transition metal halide preferably tungsten, molybdenum, or tantalum halides and a diaryl carbinol of the formula ##STR1## wherein G is independently C.sub.1-12 alkyl, C.sub.1-12 alkoxy, C.sub.1-12 alkylamino, C.sub.6-20 aryl, halide, or C.sub.1-6 haloalkyl; g is independently 0 to 4; R is independently hydrogen or G or the R's are combined as a single bond or as a bridging group X, where X is CH.sub.2, CH.sub.2 CH.sub.2, O, S, SO, SO.sub.2 or NR.sup.1, and R.sup.1 is H or C.sub.1-6 alkyl. Optional co-catalysts include borohydrides, organo tin hydrides and organo aluminum compounds. Polymerization can be carried out in a reaction injection molding process to prepare a molded article.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: January 4, 1994
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • Patent number: 5254629
    Abstract: A catalyst and process for the polymerization of cyclic olefins, such as dicyclopentadiene, in the presence of an elastomer polymer, are disclosed. The catalyst includes a transition metal compound, a co-catalyst and a boron halide promoter. Polymerization can be carried out at fast reaction times in a reaction injection molding process to prepare a thermoset molded article having high Tg and superior toughness.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: October 19, 1993
    Assignee: Shell Oil Company
    Inventors: Donald R. Kelsey, Dale L. Handlin, Jr.
  • Patent number: 5218065
    Abstract: An improved olefin metathesis catalyst system comprises a tungsten halide having an average of no more than about one halide substituent and no more than one oxygen substituent per tungsten with the remaining tungsten valences satisfied with phenolic substituents incorporating at least one meta or para electron withdrawing group and a triorganotin hydride and, optionally, a boron halide promoter. The catalyst system forms a relatively stable polymerization mixture with polycycloolefins and effectively polymerizes dicyclopentadiene in the presence of water.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: June 8, 1993
    Assignee: Shell Oil Company
    Inventors: Donald R. Kelsey, Betty M. Scardino, Dale L. Handlin, Jr.
  • Patent number: 5147950
    Abstract: A catalyst and process for the polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst includes a transition metal compound and a borohydride co-catalyst, with optional boron halide promoter. Polymerization can be carried out in a reaction injection molding process to prepare a thermoset molded article.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: September 15, 1992
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey