Patents by Inventor William P. Enlow
William P. Enlow 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).
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Patent number: 6214915Abstract: Thermoplastic resin composition are provided that comprise a thermoplastic resin or mixture thereof and a stabilizing amount of an aromatic ketone compound, derivative of an aromatic ketone compound, or an adduct of an aromatic ketone compound, optionally containing a stabilizing amount of a stabilizer or mixture of stabilizers selected from the group consisting of the phenolic antioxidants, the 3-arylbenzofuranones, the hindered amine stabilizers, the ultraviolet light absorbers, the organic phosphorus compounds, the alkaline metal salts of fatty acids, the hydrotalcites, the epoxydized soybean oils, the hydroxylamines, the tertiary amine oxides, thermal reaction products of tertiary amine oxides, and the thiosynergists. The compositions have improved stability against thermal degradation.Type: GrantFiled: December 10, 1998Date of Patent: April 10, 2001Assignee: General Electric CompanyInventors: Roger W. Avakian, William P. Enlow, Vaikunth S. Prabhu, Carloss L. Gray, James A. Mahood
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Patent number: 6022916Abstract: Melt extrusion processes involving phosphite stabilized polyolefin compositions subject to solid by-product formation during melt extrusion are improved by the addition of a metal salt of a lactic acid to the composition. The processes involving the improved compositions exhibit reduced levels of screen pack plugging during fiber and film extrusion processes than that achieved with fatty acid salts, such as calcium stearate.Type: GrantFiled: August 9, 1994Date of Patent: February 8, 2000Assignee: General Electric CompanyInventors: William P. Enlow, Roger W. Avakian
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Patent number: 5849231Abstract: Melt extrusion processes involving phosphite stabilized polyolefin compositions subject to solid by-product formation during melt extrusion are improved by the addition of an epoxidized ester of a fatty acid to the composition. The processes involving the improved compositions exhibit reduced levels of screen pack plugging during fiber and film extrusion processes than that achieved with fatty acid salts, such as calcium stearate.Type: GrantFiled: March 29, 1993Date of Patent: December 15, 1998Assignee: General Electric CompanyInventor: William P. Enlow
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Patent number: 5616767Abstract: A process is provided for making 2,2 bisphenyl phosphites and 2,2 biphenyl phosphites. The process provides pure product without requiring a recrystallization step. The process involves reacting phosphorous trichloride with either (a) an aromatic diphenol selected from the group of bisphenyl and biphenyls or (b) a monohydroxy hydrocarbon compound, to induce a first product, and then reacting the first product with the other of (a) and (b) in the presence of an amount of tri-n-alkylamine sufficient to neutralize the hydrochloric acid produced in the second reaction, and utilizing an aromatic liquid hydrocarbon medium and a minimum amount to facilitate precipitation of the resultant aromatic phosphite.Type: GrantFiled: February 28, 1995Date of Patent: April 1, 1997Assignee: General Electric CompanyInventors: William P. Enlow, James A. Mahood
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Patent number: 5594053Abstract: An stabilized thermoplastic composition comprising a stabilizing amount of a phosphite of the formula: ##STR1## R.sub.1 is independently selected from the group consisting of alkyl groups having from 1 to 9 carbon atoms, Y is independently selected from the group consisting of hydrogen, halogen, or alkyl; and the --O--X groups are positioned at the respective ortho- or para- positions with respect to the diphenyl linkage, the remaining ortho- and para- positions with respect to the --O--X linkage being occupied by R.sub.1 whereby the --0--X groups are hindered by the presence of at least one R.sub.1 group; R.sup.Type: GrantFiled: January 22, 1996Date of Patent: January 14, 1997Assignee: General Electric CompanyInventors: Roger W. Avakian, Vaikunth S. Prabhu, William P. Enlow, Carloss L. Gray
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Patent number: 5414034Abstract: Melt extrusion processes involving phosphite stabilized polyolefin compositions subject to solid by-product formation during melt extrusion are improved by the addition of a metal salt of a lactic acid to the composition. The processes involving the improved compositions exhibit reduced levels of screen pack plugging during fiber and film extrusion processes than that achieved with fatty acid salts, such as calcium stearate.Type: GrantFiled: March 29, 1993Date of Patent: May 9, 1995Assignee: General Electric CompanyInventors: William P. Enlow, Roger W. Avakian
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Patent number: 5342978Abstract: Hydrolytically stabilized phosphite compositions are provided. The compositions contain an organic phosphite ester antioxidant and a hindered piperidinyl light stabilizer. The hindered piperidinyl component is not only a light stabilizer but also functions to hydrolitically stabilize the organic phosphite antioxidant. The compositions are useful as stabilizer additives to polymeric compositions.Type: GrantFiled: May 24, 1993Date of Patent: August 30, 1994Assignee: General Electric CompanyInventors: William P. Enlow, Leo L. Valdiserri
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Patent number: 5308901Abstract: The present invention provides an improved process for making diphosphaspiroundecanes and product-by-process, wherein the process comprises reacting a hydroxyl-substituted organic compound, phosphorous trichloride and pentaerythritol to form an organic-substituted diphosphaspiroundecane such that formation of said organic-substituted diphosphaspiroundecane takes place in the presence of a tri-n-alkylamine having n-alkyl moieties such that each n-alkyl moiety has at least three carbon atoms. The present invention is also directed to bis-3,9-(2,6-di-t-alkyl-4-alkylphenoxy)-2,4,8,10-tetroxa-3,9-diphosphaspri o[5.5]undecanes and polymer composition containing an effective amount of same.Type: GrantFiled: September 27, 1993Date of Patent: May 3, 1994Assignee: General Electric CompanyInventors: Stephen J. Hobbs, Kevin J. Sheehan, William P. Enlow
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Patent number: 5142083Abstract: Hydrolytically stable phosphite compositions for melt flow and color stabilization of thermoplastics may be prepared from crude tetrahydroabietyl alcohol. The phosphites may be prepared by reacting said alcohol with an organophosphite, such as by transesterification. Other synthesis techniques may also be used.Type: GrantFiled: July 16, 1991Date of Patent: August 25, 1992Assignee: General Electric CompanyInventor: William P. Enlow
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Patent number: 5141975Abstract: Hydrolytically stable phosphite compositions for melt flow and color stabilization of thermoplastics may be prepared from crude tetrahydroabietyl alcohol. The phosphites may be reacting said alcohol with an organophosphite, such as by transesterification. Other synthesis techniques may also be used.Type: GrantFiled: July 15, 1991Date of Patent: August 25, 1992Assignee: General Electric CompanyInventor: William P. Enlow
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Patent number: 5137950Abstract: The present invention provides an improved process for making diphosphaspiroundecanes and product-by-process, wherein the process comprises reacting a hydroxyl-substituted organic compound, phosphorous trichloride and pentaerythritol to form an organic-substituted diphosphaspiroundecane such that formation of said organic-substituted diphosphaspiroundecane takes place in the presence of a tri-n-alkylamine having n-alkyl moieties such that each n-alkyl moiety has at least three carbon atoms. The present invention is also directed to bis-3,9-(2,6-di-t-alkyl-4-alkylphenoxy)-2,4,8,10-tetroxa-3,9-diphosphaspri o[5.5]undecanes and polymer compositions containing an effective amount of same.Type: GrantFiled: September 25, 1991Date of Patent: August 11, 1992Assignee: Borg-Warner Specialty Chemicals, Inc.Inventors: Stephen J. Hobbs, Kevin J. Sheehan, William P. Enlow
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Patent number: 5124472Abstract: Hydrolytically stable phosphite compositions for melt flow and color stabilization of thermoplastics may be prepared from crude tetrahydroabietyl alcohol. The phosphites may be reacting said alcohol with an organophosphite, such as by transesterification. Other synthesis techniques may also be used.Type: GrantFiled: June 7, 1990Date of Patent: June 23, 1992Assignee: General Electric CompanyInventor: William P. Enlow
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Patent number: 4755546Abstract: Thermal stabilization of olefin polymers, particularly polypropylene. Stabilization is accomplished by means of an ester of a pentaerythritol monoacetal. The ester contains a phenolic group.Type: GrantFiled: March 6, 1985Date of Patent: July 5, 1988Assignee: Borg-Warner Chemicals, Inc.Inventors: Ingenuin Hechenbleikner, William P. Enlow
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Patent number: 4551539Abstract: N-substituted 2,5-dimethylpyrroles and a method for their preparation. The method requires the reaction of a 2,5-hexadione such as acetonylacetone with a urethane or a phosphoroamidate. The reaction is carried out at elevated temperatures, preferably in a water-immiscible solvent.Type: GrantFiled: October 17, 1984Date of Patent: November 5, 1985Assignee: Borg-Warner Chemicals, Inc.Inventors: Ingenuin Hechenbleikner, William P. Enlow
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Patent number: 4551540Abstract: N-substituted 2,5-dimethylpyrroles and a method for their preparation. The method requires the reaction of a 2,5-hexadione such as acetonylacetone with a urethane or a phosphoroamidate. The reaction is carried out at elevated temperatures, preferably in a water-immiscible solvent.Type: GrantFiled: October 17, 1984Date of Patent: November 5, 1985Assignee: Borg-Warner Chemicals, Inc.Inventors: Ingenuin Hechenbleikner, William P. Enlow
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Patent number: 4511725Abstract: N-acyl-2,5-dimethylpyrroles and a process for their preparation. The process involves heating a mixture of acetonylacetone and an amide. The ensuing reaction is a condensation reaction with water being split out.Type: GrantFiled: January 17, 1983Date of Patent: April 16, 1985Assignee: Borg-Warner Chemicals, Inc.Inventors: Ingenuin Hechenbleikner, William P. Enlow
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Patent number: 4507489Abstract: Esters of monoacetals of pentaerythritol. The monoacetals result from the reaction of a 4-hydroxyphenylpropionaldehyde and pentaerythritol, and the further reaction of this monoacetal with either of two particular acid chlorides yields the esters of the invention. These esters are useful, in small proportions, to stabilize polymer compositions, especially olefin polymers.Type: GrantFiled: September 9, 1982Date of Patent: March 26, 1985Assignee: Borg-Warner Chemicals, Inc.Inventors: Ingenuin Hechenbleikner, William P. Enlow
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Patent number: 4501838Abstract: Thermal stabilization of olefin polymers, particularly polypropylene. Stabilization is accomplished by means of an ester of a pentaerythritol monoacetal. The ester contains a phenolic group.Type: GrantFiled: September 14, 1982Date of Patent: February 26, 1985Assignee: Borg-Warner Chemicals, Inc.Inventors: Ingenuin Hechenbleikner, William P. Enlow
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Patent number: 4456567Abstract: A process for preparing an asymmetrical pentaerythritol compound containing both trivalent and pentavalant phosphorus. The process involves merely bubbling oxygen into a solution containing 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro [5,5] undecane.Type: GrantFiled: July 6, 1983Date of Patent: June 26, 1984Assignee: Borg-Warner CorporationInventors: Ingenuin Hechenbleikner, William P. Enlow
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Patent number: 4450113Abstract: Organic zerovalent nickel complexes wherein the organic portion is derived from an ester of pentaerythritol phosphite. The complexes are believed to have a tetrahedral structure; one nickel atom is complexed with four molecules of the pentaerythritol phosphite ester. The nickel complexes are useful as polymer additives, being effective to impart improved resistance to deterioration of olefin polymers upon exposure to ultraviolet light.Type: GrantFiled: August 9, 1982Date of Patent: May 22, 1984Assignee: Borg-Warner Chemicals, Inc.Inventors: Ingenuin Hechenbleikner, William P. Enlow, David C. Lankin