Patents Assigned to Dover Chemical Corporation
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Publication number: 20140080948Abstract: 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: ApplicationFiled: September 16, 2013Publication date: March 20, 2014Applicant: Dover Chemical CorporationInventors: Don STEVENSON, Jacob LANCE, Michael Jakupca
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Patent number: 8664171Abstract: 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: GrantFiled: August 8, 2008Date of Patent: March 4, 2014Assignee: Dover Chemical CorporationInventors: Donald Stevenson, Duong N. Nguyen
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Publication number: 20130345346Abstract: A polymeric polyphosphite and copolymeric polyphosphite is described which contains a cycloaliphatic moiety, preferably cyclohexane dimethanol, in the polyphosphite backbone chain.Type: ApplicationFiled: June 19, 2013Publication date: December 26, 2013Applicant: DOVER CHEMICAL CORPORATIONInventors: Michael R. Jakupca, Jacob M. Lance, Donald Stevenson
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Patent number: 8563637Abstract: 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: GrantFiled: October 19, 2010Date of Patent: October 22, 2013Assignee: Dover Chemical CorporationInventors: Michael Jakupca, Jacob M. Lance, Donald Stevenson
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Publication number: 20130225736Abstract: 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: ApplicationFiled: August 17, 2012Publication date: August 29, 2013Applicant: Dover Chemical CorporationInventors: Michael Jakupca, Jacob M. Lance, Donald Stevenson
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Patent number: 8445567Abstract: 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: GrantFiled: February 22, 2010Date of Patent: May 21, 2013Assignee: Dover Chemical CorporationInventors: Donald Stevenson, Michael Jakupca, Nina Bersaglini
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Patent number: 8278490Abstract: 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: GrantFiled: July 19, 2010Date of Patent: October 2, 2012Assignee: Dover Chemical CorporationInventors: Donald Stevenson, Ping Lue, Jacob M. Lance
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Patent number: 8258215Abstract: 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: GrantFiled: February 5, 2010Date of Patent: September 4, 2012Assignee: Dover Chemical CorporationInventors: Michael Jakupca, Jacob M. Lance, Nina Bersaglini, Donald Stevenson
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Patent number: 8058317Abstract: 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: GrantFiled: July 16, 2007Date of Patent: November 15, 2011Assignee: Dover Chemical CorporationInventor: Duong N Nguyen
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Publication number: 20110263760Abstract: 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: ApplicationFiled: October 19, 2010Publication date: October 27, 2011Applicant: Dover Chemical CorporationInventors: Michael Jakupca, Jacob M. Lance, Donald Stevenson
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Publication number: 20110196079Abstract: 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: ApplicationFiled: February 5, 2010Publication date: August 11, 2011Applicant: DOVER CHEMICAL CORPORATIONInventors: Michael JAKUPCA, Jacob M. LANCE, Nina BERSAGLINI, Donald R. STEVENSON
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Patent number: 7960323Abstract: 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: GrantFiled: January 24, 2007Date of Patent: June 14, 2011Assignee: Dover Chemical CorporationInventor: Duong N. Nguyen
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Publication number: 20110021839Abstract: 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: ApplicationFiled: July 19, 2010Publication date: January 27, 2011Applicant: DOVER CHEMICAL CORPORATIONInventors: Donald Stevenson, Ping Lue, Jacob M. Lance
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Publication number: 20100216923Abstract: 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: ApplicationFiled: February 22, 2010Publication date: August 26, 2010Applicant: DOVER CHEMICAL CORPORATIONInventors: Donald Stevenson, Michael Jakupca, Nina Bersaglini
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Patent number: 7595412Abstract: 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: GrantFiled: August 5, 2002Date of Patent: September 29, 2009Assignee: Dover Chemical CorporationInventors: Thomas Jennings, Ssatyan Kodali, W. Matthew Fender, Donald R. Stevenson
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Patent number: 7470735Abstract: 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: GrantFiled: May 14, 2004Date of Patent: December 30, 2008Assignee: Dover Chemical CorporationInventors: Donald R. Stevenson, Duong N. Nguyen, Mark E. Harr, Michael R. Jakupca
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Publication number: 20080305974Abstract: 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: ApplicationFiled: August 8, 2008Publication date: December 11, 2008Applicant: Dover Chemical CorporationInventors: Donald Stevenson, Duong Nguyen
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Patent number: 7342060Abstract: 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: GrantFiled: December 11, 2003Date of Patent: March 11, 2008Assignee: Dover Chemical CorporationInventor: Carroll W. Larke
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Patent number: 7320764Abstract: 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: GrantFiled: May 11, 2004Date of Patent: January 22, 2008Assignee: Dover Chemical CorporationInventors: Donald R. Stevenson, Thomas C. Jennings, Mark E. Harr, Michael R. Jakupca
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Publication number: 20070270509Abstract: 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: ApplicationFiled: July 16, 2007Publication date: November 22, 2007Applicant: Dover Chemical CorporationInventor: Duong Nguyen