Patents Assigned to Dover Chemical Corporation
  • Publication number: 20140080948
    Abstract: A composition having a polymeric ester having the formula: wherein each R is the same or different and independently selected from the group consisting of H, C1-20 alkyl carboxylate, C3-22 alkenyl carboxylate, C6-40 cycloalkyl carboxylate, and C6-40 cycloalkylene carboxylate; R2 is selected from the group consisting of C1-20 alkyl, C3-22 alkenyl, C6-40 cycloalkyl, and C6-40 cycloalkylene; and at least one polymer additive.
    Type: Application
    Filed: September 16, 2013
    Publication date: March 20, 2014
    Applicant: Dover Chemical Corporation
    Inventors: Don STEVENSON, Jacob LANCE, Michael Jakupca
  • Patent number: 8664171
    Abstract: This invention relates to products useful in friction-reducing extreme-pressure lubricating applications such as internal combustion engines, gear oils and applications which involve rubbing metallic moving parts. The invention includes additive blends and a process of using synergistic combinations of nitro compounds with non-chlorine containing additives such as sulfur-containing moieties and phosphorus-containing moieties.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: March 4, 2014
    Assignee: Dover Chemical Corporation
    Inventors: Donald Stevenson, Duong N. Nguyen
  • Publication number: 20130345346
    Abstract: A polymeric polyphosphite and copolymeric polyphosphite is described which contains a cycloaliphatic moiety, preferably cyclohexane dimethanol, in the polyphosphite backbone chain.
    Type: Application
    Filed: June 19, 2013
    Publication date: December 26, 2013
    Applicant: DOVER CHEMICAL CORPORATION
    Inventors: Michael R. Jakupca, Jacob M. Lance, Donald Stevenson
  • Patent number: 8563637
    Abstract: An alkylphenol-free liquid polymeric phosphite is described of general Structure IV illustrated below wherein each R1, R2, R3 and R4 can be the same or different and independently selected from the group consisting of C1-20 alkyl, C3-22 alkenyl, C6-40 cycloalkyl, C7-40 cycloalkylene, C1-20 methoxy alkyl glycol ethers, C1-20 alkyl glycol ethers, and or Y—OH; Y is selected from the group consisting of C2-40 alkylene, C2-40 alkyl lactone, —R7—N(R8)—R9—, wherein R7, R8 and R9 are independently selected from the group previously defined for R1, R2, R3 and R4, now further including H; m is an integral value ranging from 2 to 100 inclusive; and x is an integral value ranging from 1 to 1,000. The alkylphenol-free liquid polymeric phosphite is useful in reducing phosphite migration within polymers.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: October 22, 2013
    Assignee: Dover Chemical Corporation
    Inventors: Michael Jakupca, Jacob M. Lance, Donald Stevenson
  • Publication number: 20130225736
    Abstract: An alkylphenol-free liquid polymeric polyphosphite is described of general Structure IV illustrated below wherein each R1, R2, R3 and R4 can be the same or different and independently selected from the group consisting of C1-20 alkyl, C2-22 alkenyl, C6-40 cycloalkyl, C7-40 cycloalkylene, C3-20 methoxy alkyl glycol ethers, C3-20 alkyl glycol ethers, and or Y—OH; Y is selected from the group consisting of C2-40 alkylene, C2-40 alkyl lactone, —R7—N(R8)—R9—, wherein R7, R8 and R9 are independently selected from the group previously defined for R1, R2, R3 and R4, now further including H; m is an integral value ranging from 2 to 100 inclusive; and x is an integral value ranging from 1 to 1,000 and further in which by controlling a molar ratio of reactants, the number of terminal hydroxyl groups is minimized. The alkylphenol-free liquid polymeric phosphite is useful in reducing phosphite migration within polymers.
    Type: Application
    Filed: August 17, 2012
    Publication date: August 29, 2013
    Applicant: Dover Chemical Corporation
    Inventors: Michael Jakupca, Jacob M. Lance, Donald Stevenson
  • Patent number: 8445567
    Abstract: A process is described which reduces the amount of bloom and/or plate-out of phosphite antioxidants during polymer processing by the addition of at least one polyethylene glycol (or blends thereof) or polycaprolactones (or blends thereof) having an average molecular weight of approximately 1,000 to 20,000, most preferably between 4,000 to 10,000.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: May 21, 2013
    Assignee: Dover Chemical Corporation
    Inventors: Donald Stevenson, Michael Jakupca, Nina Bersaglini
  • Patent number: 8278490
    Abstract: The present invention pertains to a process for the preparation of pentaerythritol diphosphites via a one-pot, direct esterification of phosphorus trichloride with pentaerithritol, and either an alkylphenol or an arylalkylphenol which functions both as a reactant and as a solvent, with a phase transfer catalyst such as a quaternary ammonium salt.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: October 2, 2012
    Assignee: Dover Chemical Corporation
    Inventors: Donald Stevenson, Ping Lue, Jacob M. Lance
  • Patent number: 8258215
    Abstract: A process to stabilize a polymer is described utilizing the step of adding a phosphite reaction product of a triphenyl phosphite or lower molecular weight trialkyl phosphite (e.g., trimethyl phosphite) or triaryl phosphite, with from approximately 1 to 2 moles of preferably a paracumyl phenol, and with from approximately 1 to 2 moles of at least C12-20 carbon alkyl or C12-20 alkenyl alcohol.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: September 4, 2012
    Assignee: Dover Chemical Corporation
    Inventors: Michael Jakupca, Jacob M. Lance, Nina Bersaglini, Donald Stevenson
  • Patent number: 8058317
    Abstract: This Invention relates to products and processes for making extreme-pressure additives (water-dispersible and oil-based). The process includes nitrating fatty raw material sources such as animal fats, vegetable oils, the fatty acids and synthetic esters derived therefrom, terminal or internal olefins, polyalkenes or their linear copolymers, and alkylated phenols, using 70% nitric acid or nitrogen dioxide gas. The additives are used as soluble oils or as lubricating blends by the inclusion of emulsifiers. The nitrated unsaturated fatty acids such as tallow fatty acid, oleic acid, tall oil fatty acid, tall-oil derived dimer acids, castor oil fatty acid, alkyl succinic acids, are modified by post-reaction to form alkanolamine (monoethanolamine, triethanolamine) salts or alkanolamides in order to obtain the derived water-dispersible nitro-EP additives.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: November 15, 2011
    Assignee: Dover Chemical Corporation
    Inventor: Duong N Nguyen
  • Publication number: 20110263760
    Abstract: An alkylphenol-free liquid polymeric phosphite is described of general Structure IV illustrated below wherein each R1, R2, R3 and R4 can be the same or different and independently selected from the group consisting of C1-20 alkyl, C3-22 alkenyl, C6-40 cycloalkyl, C7-40 cycloalkylene, C1-20 methoxy alkyl glycol ethers, C1-20 alkyl glycol ethers, and or Y—OH; Y is selected from the group consisting of C2-40 alkylene, C2-40 alkyl lactone, —R7—N(R8)—R9—, wherein R7, R8 and R9 are independently selected from the group previously defined for R1, R2, R3 and R4, now further including H; m is an integral value ranging from 2 to 100 inclusive; and x is an integral value ranging from 1 to 1,000. The alkylphenol-free liquid polymeric phosphite is useful in reducing phosphite migration within polymers.
    Type: Application
    Filed: October 19, 2010
    Publication date: October 27, 2011
    Applicant: Dover Chemical Corporation
    Inventors: Michael Jakupca, Jacob M. Lance, Donald Stevenson
  • Publication number: 20110196079
    Abstract: A process to stabilize a polymer is described utilizing the step of adding a phosphite reaction product of a triphenyl phosphite or lower molecular weight trialkyl phosphite (e.g., trimethyl phosphite) or triaryl phosphite, with from approximately 1 to 2 moles of preferably a paracumyl phenol, and with from approximately 1 to 2 moles of at least C12-20 carbon alkyl or C12-20 alkenyl alcohol.
    Type: Application
    Filed: February 5, 2010
    Publication date: August 11, 2011
    Applicant: DOVER CHEMICAL CORPORATION
    Inventors: Michael JAKUPCA, Jacob M. LANCE, Nina BERSAGLINI, Donald R. STEVENSON
  • Patent number: 7960323
    Abstract: This invention relates to processes for making nitro compounds derived from C2-C30 unsaturated fatty acids; C2-C30 unsaturated fatty oils; esters derived from the reaction of C1-C20 alcohols with unsaturated C2-C30 fatty acids; C2-C20 polyolefins; C4-C20 polydiolefins; C8-C20 copolymers derived from polyolefins and vinyl aromatics; and C4-C30 alkylated phenols using nitric acid or gaseous nitrogen dioxide. This class of extreme-pressure additives was found extremely effective in processing steel, stainless steel and special titanium and nickel or low-iron alloys.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: June 14, 2011
    Assignee: Dover Chemical Corporation
    Inventor: Duong N. Nguyen
  • Publication number: 20110021839
    Abstract: The present invention pertains to a process for the preparation of pentaerythritol diphosphites via a one-pot, direct esterification of phosphorus trichloride with pentaerithritol, and either an alkylphenol or an arylalkylphenol which functions both as a reactant and as a solvent, with a phase transfer catalyst such as a quaternary ammonium salt.
    Type: Application
    Filed: July 19, 2010
    Publication date: January 27, 2011
    Applicant: DOVER CHEMICAL CORPORATION
    Inventors: Donald Stevenson, Ping Lue, Jacob M. Lance
  • Publication number: 20100216923
    Abstract: A process is described which reduces the amount of bloom and/or plate-out of phosphite antioxidants during polymer processing by the addition of at least one polyethylene glycol (or blends thereof) or polycaprolactones (or blends thereof) having an average molecular weight of approximately 1,000 to 20,000, most preferably between 4,000 to 10,000.
    Type: Application
    Filed: February 22, 2010
    Publication date: August 26, 2010
    Applicant: DOVER CHEMICAL CORPORATION
    Inventors: Donald Stevenson, Michael Jakupca, Nina Bersaglini
  • Patent number: 7595412
    Abstract: A novel composition and methods of its use and preparation of polybasic metal carboxylate complexes having the general formula: (A)2M.nD(OH)2.xH2O.m(B)2N wherein: A is an organic fatty acid and is selected from the group consisting of saturated C12-24 carboxylic acids, unsaturated C12-24 carboxylic acids, aromatic C12-24 carboxylic acids, alicyclic C12-24 carboxylic acids, polycarboxylic acid derivatives thereof, anhydride derivatives thereof and blends thereof, preferably stearate; M is a divalent metal cation, preferably calcium; n is a fractional or whole number from about 1 to about 10 inclusive; D is an alkali earth metal, preferably calcium; x is a fractional or whole number from about 0 to about 3 inclusive; N is a divalent metal cation other than calcium, preferably zinc; and m is a fractional or whole number from 0 to about 1.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: September 29, 2009
    Assignee: Dover Chemical Corporation
    Inventors: Thomas Jennings, Ssatyan Kodali, W. Matthew Fender, Donald R. Stevenson
  • Patent number: 7470735
    Abstract: Various phenol-free phosphites for use in PVC as an alternative to the conventional phenol-containing products phenyl diisodecyl phosphite and diphenyl isodecyl phosphite were tested. These phosphites utilize para-cumyl phenol-based derivatives in order to provide a phenol free derivative of the above mentioned conventional phosphites.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: December 30, 2008
    Assignee: Dover Chemical Corporation
    Inventors: Donald R. Stevenson, Duong N. Nguyen, Mark E. Harr, Michael R. Jakupca
  • Publication number: 20080305974
    Abstract: This invention relates to products useful in friction-reducing extreme-pressure lubricating applications such as internal combustion engines, gear oils and applications which involve rubbing metallic moving parts. The invention includes additive blends and a process of using synergistic combinations of nitro compounds with non-chlorine containing additives such as sulfur-containing moieties and phosphorus-containing moieties.
    Type: Application
    Filed: August 8, 2008
    Publication date: December 11, 2008
    Applicant: Dover Chemical Corporation
    Inventors: Donald Stevenson, Duong Nguyen
  • Patent number: 7342060
    Abstract: A method is disclosed for the production of pentaerythritol diphosphites of high spiro isomer content. The pentaerythritol diphosphites are produced via sequential transesterification of pentaerythritol with a monophosphite followed by a substituted phenol or other alcohol, wherein the transesterification reactions are carried out under controlled conditions of temperature and pressure. The unique reaction conditions result in intermediate and final pentaerythritol diphosphites of high spiro isomer content and high total yield of the diphosphites.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: March 11, 2008
    Assignee: Dover Chemical Corporation
    Inventor: Carroll W. Larke
  • Patent number: 7320764
    Abstract: The invention relates to liquid polymer additive compositions comprising blends of phosphite esters selected from the group consisting of aryl phosphites, alkyl phosphites, aryl/alkyl phosphites, bisphenol-A phosphites, dialkylene glycol phosphites and polydialkylene glycol phosphites, pentaerythritol phosphites, p-cumyl phenol phosphites with from 50 to 800 ppm inclusive of zinc per 100 parts resin. The stabilizer is used as either a complete or a partial replacement of toxic-metal containing antioxidant stabilizer additives.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: January 22, 2008
    Assignee: Dover Chemical Corporation
    Inventors: Donald R. Stevenson, Thomas C. Jennings, Mark E. Harr, Michael R. Jakupca
  • Publication number: 20070270509
    Abstract: This invention relates to products and processes for making extreme-pressure additives (water-dispersible and oil-based) using starting compounds based on nitro moieties derived from C2-C30 unsaturated fatty acids; C2-C30 unsaturated natural fatty oils or triglycerides; synthetic esters derived from the reaction of C1-C20 alcohols with unsaturated C2-C30 fatty acids; polyglycol esters of unsaturated fatty acids; C2-C20 terminal or internal olefins; C2-C20 polyolefins; C4-C20 polydiolefins; C8-C20 copolymers derived from polyolefins and vinyl aromatics; and C4-C30 alkylated phenols, using nitric acid or gaseous nitrogen dioxide as nitrating agents, followed by chemical modifications involving the synthesis of alkanolamine salts or alkanolamides of nitrated fatty acids or ethoxylated nitrated fatty esters.
    Type: Application
    Filed: July 16, 2007
    Publication date: November 22, 2007
    Applicant: Dover Chemical Corporation
    Inventor: Duong Nguyen