Patents by Inventor Andrew B. Auerbach
Andrew B. Auerbach 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: 5824767Abstract: A process for improving the processability of poly(arylene sulfide) in melt spinning operations by treatment with a barium-containing compound and, optionally, a lubricant is disclosed.Type: GrantFiled: July 8, 1996Date of Patent: October 20, 1998Assignee: Hoechst Celanese CorporationInventors: Balaram B. Gupta, Andrew B. Auerbach, Barrie L. Davies
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Patent number: 5652287Abstract: A resin composition which comprises:(A) from about 99.5 to about 70 percent by weight, based on the total weight of components (A) and (B), of a poly(arylene sulfide) having a melt viscosity of from about 300 to about 8,000 poise at 1,200 sec.sup.-1 and 310.degree. C.;(B) from about 0.5 to about 30 percent by weight, based on the total weight of components (A) and (B), of a substantially non-functionalized, emulsion cured silicone rubber which is the condensation product of (i) an organopolysiloxane having at least two active hydrogen functional groups per molecule, and (ii) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule, said silicone rubber being melt dispersable with the poly(arylene sulfide); and(C) from about 0.1 to about 2.0 parts by weight, based on 100 parts by weight of components (A), (B) and (C) combined, of an aminosilane, wherein said composition has been prepared by combining components B and C with component A in the absence of a dispersion medium.Type: GrantFiled: April 10, 1996Date of Patent: July 29, 1997Assignee: Hoechst Celanese CorporationInventors: Vincent J. Sullivan, Andrew B. Auerbach
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Patent number: 5206308Abstract: Novel oxymethylene graft polymers are obtained by grafting, via Michael addition, an amine functional polymer onto an oxymethylene backbone having pendant acrylate or substituted acrylate ester groups serving as reactive sites for the graft reaction.Type: GrantFiled: March 4, 1991Date of Patent: April 27, 1993Assignee: Hoechst Celanese CorporationInventors: Andrew B. Auerbach, Jerry A. Broussard, Nan L. Yang, James L. Paul
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Patent number: 5079340Abstract: A thermoplastic polyketone polymer composition having thermoset properties, processes for its production, and articles made thereof are disclosed. This composition also having improved continuous use temperature and thermal stability properties can be produced by crosslinking, at elevated temperatures, a thermoplastic polyketone resin with a suitable basic material. Optionally, suitable lubricants or fillers can also be added to further improve the properties of the resulting composition.Type: GrantFiled: April 30, 1991Date of Patent: January 7, 1992Assignee: Shell Oil CompanyInventors: Andrew B. Auerbach, Stephen J. Hanley
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Patent number: 5047465Abstract: The present invention relates to an impact resistant polymeric composition comprising a polyarylene sulfide and a thermally stable modified selectively hydrogenated high 1,2 content block copolymer wherein at least one graftable functional molecule is grafted to the block copolymer in the vinylarene block.Type: GrantFiled: July 7, 1989Date of Patent: September 10, 1991Assignee: Hoechst Celanese CorporationInventor: Andrew B. Auerbach
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Patent number: 5043398Abstract: Novel oxymethylene graft polymers are obtained by grafting a functional compound (i.e., a polymer or compound having one or two hydroxyl, carboxyl, or amine functional groups) onto an oxymethylene backbone having pendant hydroxyl groups which serve as reactive sites for the graft reaction with diisocyanate coupling agents.Type: GrantFiled: May 12, 1989Date of Patent: August 27, 1991Assignee: Hoechst Celanese CorporationInventors: Andrew B. Auerbach, Jerry A. Broussard, Nan L. Yang, James L. Paul
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Patent number: 5004798Abstract: Cationic copolymerization of trioxane and trimethylolpropane (TMP) formal or its ester derivatives yields acetal copolymers having pendant functional groups. The TMP formal or ester derivatives of TMP formal may therefore include functional groups selected from hydroxyl or ester moieties which are protected and thus survive the copolymerization with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block copolymers and/or to chemically bind modifiers to the acetal copolymer backbone, for example.Type: GrantFiled: May 12, 1989Date of Patent: April 2, 1991Assignee: Hoechst Celanese CorporationInventors: Jerry A. Broussard, Andrew B. Auerbach, Nan L. Yang, James L. Paul, Yong C. Zheng, Chong L. Zhang
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Patent number: 4975518Abstract: Cationic copolymerization of trioxane and 1,2,6-hexanetriol formal (HTF) or its ester derivatives yields acetal copolymers having pendant functional groups. The HTF formal or ester derivatives of HTF may therefore include functional groups selected from hydroxyl or ester moieties which are protected, and thus survive, the copolymerization with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block copolymers and/or to chemically bind modifiers to the acetal copolymer backbone, for example.Type: GrantFiled: May 12, 1989Date of Patent: December 4, 1990Assignee: Hoechst Celanese CorporationInventors: Jerry A. Broussard, Andrew B. Auerbach, James L. Paul
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Patent number: 4843115Abstract: An oxymethylene polymer composition which exhibits a reduced tendency to form mold deposits upon molding, reduced tendency to discolor under thermal stress and low extractable formaldehyde levels is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a cyclic amidine compound of the formula: ##STR1## wherein R is phenyl, polynuclear aromatic, heterocyclic, cycloaliphatic and aliphatic containing at least 6 carbon atoms, as well as substituted derivatives of the listed substituents.Type: GrantFiled: February 9, 1988Date of Patent: June 27, 1989Assignee: Hoechst Celanese CorporationInventors: Andrew B. Auerbach, James L. Paul, K. M. Natarajan
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Patent number: 4801626Abstract: Mechanical properties, especially tensile and flexural properties and impact strength, of glass fiber reinforced oxymethylene polymer molding compositions can be enhanced by incorporating into the molding composition an effective amount of a prepolymeric amino resin, whereby the glass fiber reinforcing agent and the oxymethylene polymer are coupled. The amino resin can be a condensation product of formaldehyde and melamine, urea, guanidine, guanamine or a substituted guanamine. An acid catalyst is preferably employed to promote the cross-linking of the prepolymeric amino resin.Type: GrantFiled: September 16, 1986Date of Patent: January 31, 1989Assignee: Celanese CorporationInventors: Andrew B. Auerbach, Derrick B. McKie
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Patent number: 4731397Abstract: Stabilized acetal polymer molding compositions are formed by first preparing an intimate dispersion of cyanoguanidine or melamine in a carrier resin, e.g. a non-ionic carrier resin such as an ethylene/ethyl acrylate copolymer, and compounding the dispersion with the acetal polymer. The resulting composition is found in many cases to have improved thermal stability over compositions prepared by adding the cyanoguanidine or melamine as pure crystals.Type: GrantFiled: September 20, 1985Date of Patent: March 15, 1988Assignee: Celanese CorporationInventors: Andrew B. Auerbach, Tom C. Yu
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Patent number: 4731396Abstract: Stabilized acetal polymer molding compositions are formed by first preparing an intimate dispersion of an amidine stabilizer in a carrier resin comprising an ionic polymer, i.e. an "ionomer", and compounding the dispersion with the acetal polymer. The resulting composition is found in many cases to have improved stability over compositions prepared by adding the amidine compound in an undispersed form.Type: GrantFiled: January 15, 1986Date of Patent: March 15, 1988Assignee: Celanese CorporationInventors: Andrew B. Auerbach, Thomas C. Yu
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Patent number: 4727106Abstract: An oxymethylene polymer composition which exhibits improved thermal stability is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a transition metal salt.Type: GrantFiled: November 18, 1986Date of Patent: February 23, 1988Assignee: Celanese Engineering Resins, Inc.Inventors: James L. Paul, Andrew B. Auerbach
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Patent number: 4689373Abstract: Mechanical properties, especially tensile and impact properties, of molding compositions comprising at least one thermoplastic oxymethylene polymer and optionally also containing an impact-enhancing amount of a polyurethane, can be improved by incorporating into the molding composition an effective amount greater than 10 weight percent of the composition of a monomeric formaldehyde/amino compound condensation product or prepolymeric amino resin selected from condensation products of formaldehyde and at least one of guanidine, urea, a substituted or unsubstituted guanamine and melamine, preferably having a degree of polymerization of about 2-5. An acid catalyst can be employed to promote the cross-linking reactions of the prepolymeric amino resin. In the compositions comprising polyurethane, amounts of the amino resin of less than 10 weight percent can be used.Type: GrantFiled: October 24, 1985Date of Patent: August 25, 1987Assignee: Celanese CorporationInventors: Andrew B. Auerbach, Derrick B. McKie
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Patent number: 4652594Abstract: Mechanical properties, especially tensile and flexural properties and impact strength, of glass fiber reinforced oxymethylene polymer molding compositions can be enhanced by incorporating into the molding compositions an effective amount of a prepolymeric amino resin, whereby the glass fiber reinforcing agent and the oxymethylene polymer are coupled. The amino resin can be a condensation product of formaldehyde and melamine, urea, guanidine, guanamine or a substituted guanamine. An acid catalyst is preferably employed to promote the cross-linking of the prepolymeric amino resin.Type: GrantFiled: October 16, 1985Date of Patent: March 24, 1987Assignee: Celanese CorporationInventors: Andrew B. Auerbach, Derrick B. McKie
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Patent number: 4352770Abstract: Cellulose is activated by penetration of the cellulose with a polar medium and mixed at a temperature at which no significant degradation occurs with an amide selected from the group consisting of dimethylacetamide, 1-methyl-2-pyrrolidinone and mixtures thereof and from 3 to 15% by weight of lithium chloride. The cellulose is then dissolved in the amide and lithium chloride in the substantial absence of any polar medium other than the amide. Shaped cellulosic products may be formed by reconstituting the cellulose in fiber, sheet or other form.Type: GrantFiled: May 1, 1981Date of Patent: October 5, 1982Assignee: International Telephone and Telegraph CorporationInventors: Albin F. Turbak, Adel El-Kafrawy, Fred W. Snyder, Jr., Andrew B. Auerbach
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Patent number: 4302252Abstract: Cellulose is activated by penetration of the cellulose with a polar medium and mixed at a temperature at which no significant degradation occurs with an amide selected from the group consisting of dimethylacetamide, 1-methyl-2-pyrrolidinone and mixtures thereof and from 3 to 15% by weight of lithium chloride. The cellulose is then dissolved in the amide and lithium chloride in the substantial absence of any polar medium other than the amide. Shaped cellulosic products may be formed by reconstituting the cellulose in fiber, sheet or other form.Type: GrantFiled: April 30, 1980Date of Patent: November 24, 1981Assignee: International Telephone and Telegraph Corp.Inventors: Albin F. Turbak, Adel El-Kafrawy, Fred W. Snyder, Jr., Andrew B. Auerbach
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Patent number: 4120836Abstract: The evolution of formaldehyde from shaped cellulose acetayte articles containing methylolated melamine or guanamine polymers is reduced by adding to the solutions from which the cellulose acetate article is regenerated, from 1 to 20% by weight based on the weight of the methylolated polymer of a cyclic urea compound.Type: GrantFiled: September 14, 1977Date of Patent: October 17, 1978Assignee: International Telephone and Telegraph CorporationInventors: Andrew B. Auerbach, John P. Thelman, Albin F. Turbak
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Patent number: 4118350Abstract: The tendency of cellulose acetate solutions, containing methylolated polymers of melamine or guanamine, to prepolymerize or gel is reduced by the addition to the solutions of an amine oxide. The amine oxide also acts to reduce the viscosity of the cellulose acetate solutions.Type: GrantFiled: September 14, 1977Date of Patent: October 3, 1978Assignee: International Telephone and Telegraph CorporationInventors: Albin F. Turbak, John P. Thelman, Andrew B. Auerbach