Patents by Inventor William W. Levis, Jr.
William W. Levis, Jr. 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: 4849459Abstract: The invention pertains to flame retardant flexible polyurethane foams prepared by reacting a polyether polyol, or organic isocyanate, and a blowing agent incorporating (a) melamine in an amount ranging from about 30 weight percent to about 55 weight percent and an effective amount of (b) another flame retardant.Type: GrantFiled: April 14, 1988Date of Patent: July 18, 1989Assignee: BASF CorporationInventors: Oscar M. Grace, William W. Levis, Jr., Steven D. Gagnon
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Patent number: 4762950Abstract: The subject invention relates to compositions prepared by oxyalkylation of N-(2-hydroxyalkyl)-aniline as the initiator compound with one or more alkylene oxides at elevated temperatures and in the presence of an alkali metal hydroxide. The resulting compositions have an unsymmetric structure with two functional groups, a secondary amino nitrogen and a hydroxyl group. The initiator compound reacts completely and removal of any residual initiator from the polyol is not required. When the subject invention polyol composition is reacted with an isocyanate, both urea and urethane groups form. The subject polyols may be used in the preparation of polyurethane products as well as nonionic and ionic surfactants.Type: GrantFiled: December 16, 1985Date of Patent: August 9, 1988Assignee: BASF CorporationInventors: Alexander Korczak, William W. Levis, Jr.
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Patent number: 4745133Abstract: The invention pertains to flame retardant polyurethane foams prepared by the reaction of a polyoxyalkylene polyether polyol with an organic polyisocyanate and a blowing agent wherein melamine is incorporated as the sole flame retardant compound. The amount of melamine may range from about 10 weight percent to about 55 weight percent of the total composition.Type: GrantFiled: March 19, 1987Date of Patent: May 17, 1988Assignee: BASF CorporationInventors: Egils Grinbergs, William W. Levis, Jr., Steven D. Gagnon
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Patent number: 4637893Abstract: A delayed co-initiation process for preparing polyol blends comprising(a) oxyalkylating a first initiator compound to obtain a polyol with a predetermined equivalent weight; and(b) adding a second initiator which may be the same as or different from the first and oxyalkylating to obtain a polyol with a predetermined equivalent weight based upon the second initiator.The resultant polyols are used in the preparation of polyurethane foams.Type: GrantFiled: May 16, 1985Date of Patent: January 20, 1987Assignee: BASF CorporationInventors: Curtis J. Reichel, William W. Levis, Jr., Robert J. Hartman
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Patent number: 4590225Abstract: The subject invention relates to alkylene oxide adducts of aniline prepared by reacting an alkylene oxide with an aniline in the presence of preferably at least 0.1 part of alkali metal hydroxide per 100 parts by weight of aniline.The resulting compositions may be used in the preparation of polyurethane products, such as rigid polyurethane foams, and may also be used as nonionic surfactants.Type: GrantFiled: January 22, 1985Date of Patent: May 20, 1986Assignee: BASF CorporationInventors: Alexander Korczak, William W. Levis, Jr.
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Patent number: 4562290Abstract: The subject invention relates to adducts of vicinal toluenediamine prepared by:(a) reacting from one to three moles of ethylene oxide with vicinal toluenediamine at a temperature of 125.degree. C., and(b) reacting the product of (a) with four to eight moles of propylene oxide at a temperature of at least 140.degree. C. in the present of at least 1.0 part of an alkali metal hydroxide catalyst.The adducts generally have a hydroxyl number of 300 to 500 and are particularly useful for the preparation of rigid polyurethane foams.Type: GrantFiled: December 1, 1981Date of Patent: December 31, 1985Assignee: BASF Wyandotte CorporationInventors: Alexander Korczak, William W. Levis, Jr.
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Patent number: 4517383Abstract: The subject invention relates to alkylene oxide adducts of aniline prepared by reacting an alkylene oxide with an aniline in the presence of preferably at least 0.1 part of alkali metal hydroxide per 100 parts by weight of aniline.The resulting compositions may be used in the preparation of polyurethane products, such as rigid polyurethane foams, and may also be used as nonionic surfactants.Type: GrantFiled: July 5, 1983Date of Patent: May 14, 1985Assignee: BASF Wyandotte CorporationInventors: Alexander Korczak, William W. Levis, Jr.
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Patent number: 4487853Abstract: A polyether-ester polyol containing a high primary hydroxyl content is prepared employing low amounts of ethylene oxide. The polyurethane foams prepared from these products display improved physical properties with good air flow.Type: GrantFiled: December 27, 1983Date of Patent: December 11, 1984Assignee: BASF Wyandotte CorporationInventors: Curtis J. Reichel, William W. Levis, Jr., Louis C. Pizzini
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Patent number: 4430247Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.Type: GrantFiled: September 29, 1977Date of Patent: February 7, 1984Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr., Louis C. Pizzini, Robert J. Hartman
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Patent number: 4421871Abstract: The subject invention relates to polyol compositions comprising the reaction product prepared by reacting from 4 to 9 moles of propylene oxide per mole of toluenediamine by weight at temperatures greater than 140.degree. C. in the presence of at least 0.6 parts of alkali metal hydroxide per 100 parts by weight of toluenediamine, with the proviso that at least 0.8 part by weight of alkali metal hydroxide is used if the toluenediamine is 2,4-toluenediamine, or 2,6-toluenediamine, or mixtures thereof.Type: GrantFiled: February 22, 1983Date of Patent: December 20, 1983Assignee: BASF Wyandotte CorporationInventors: Alexander Korczak, William W. Levis, Jr.
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Patent number: 4391728Abstract: The subject invention relates to polyol compositions comprising the reaction product prepared by reacting from 4 to 9 moles of propylene oxide per mole of toluenediamine by weight at temperatures greater than 140.degree. C. in the presence of at least 0.6 parts of alkali metal hydroxide per 100 parts by weight of toluenediamine, with the proviso that at least 0.8 part by weight of alkali metal hydroxide is used if the toluenediamine is 2,4-toluenediamine, or 2,6-toluenediamine, or mixtures thereof.Type: GrantFiled: December 1, 1981Date of Patent: July 5, 1983Assignee: BASF Wyandotte CorporationInventors: Alexander Korczak, William W. Levis, Jr.
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Patent number: 4228247Abstract: Synergistic stabilizer combinations consisting of phenols such as 2,6,-di-t-butyl-4-methylphenol, amines such as 4,4'-bis(alpha,alpha- dimethylbenzyl)diphenylamine and p,p'-di-octyldiphenylamine, and phosphites such as phenyldidecylphosphite with 3,5-di-t-butyl-4-hydroxyhydrocinnamic acid triester of 1,3,5-tris(2-hydroxyethyl)-s-triazine-2,4,6-(1H,3H,5H-trione are employed as oxidative stabilizers for polyoxyalkylene polyether polyols and for the prevention of scorch in polyurethane foams prepared therefrom.Type: GrantFiled: August 29, 1979Date of Patent: October 14, 1980Assignee: BASF Wyandotte CorporationInventors: Richard A. Moore, Robert J. Hartman, William W. Levis, Jr., Ralph E. Bloom
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Patent number: 4187357Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.Type: GrantFiled: April 13, 1978Date of Patent: February 5, 1980Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr., Louis C. Pizzini, Robert J. Hartman
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Patent number: 4177335Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.Type: GrantFiled: April 14, 1978Date of Patent: December 4, 1979Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr., Louis C. Pizzini, Robert J. Hartman
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Patent number: 4149987Abstract: An oxyalkylated, halogenated product useful in making polyurethane foams is prepared by reacting an epoxide compound with a halogenated aromatic hydroxyl-containing compound (phenol) which is either a monohydroxy or polyhydroxy compound. Said aromatic hydroxyl compound has a hydroxy group attached directly to the aromatic nucleus. By the process of the invention, hydroxyalkylation occurs in the presence of a catalyst selectively active in the predominant oxyalkylation of aromatic hydroxyl groups, said catalyst selected from the group consisting of zinc, magnesium and a zinc or magnesium salt as defined. The reaction mixture can include an aliphatic hydroxyl-containing compound, a neutral phosphorus compound, and aliphatic or aromatic anhydrides or mixtures thereof to enhance the flame-retardant properties of the oxyalkylated product.Type: GrantFiled: March 1, 1978Date of Patent: April 17, 1979Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr.
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Patent number: 4105597Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.Type: GrantFiled: August 15, 1977Date of Patent: August 8, 1978Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr., Louis C. Pizzini, Robert J. Hartman
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Patent number: 4097399Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.Type: GrantFiled: June 25, 1975Date of Patent: June 27, 1978Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr., Louis C. Pizzini, Robert J. Hartman
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Patent number: 4052345Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.Type: GrantFiled: June 25, 1975Date of Patent: October 4, 1977Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr., Louis C. Pizzini, Robert J. Hartman
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Patent number: 4021385Abstract: Polyether polyols may be synergistically stabilized against oxidation by incorporating therewith 4,4'-bis(alphadimethylbenzyl) diphenyl amine and a 2,6-di-t-butyl-4-(lower alkyl) phenol such as 2,6-di-t-butyl-4-methyl phenol or 2,6-di-t-butyl-4-butyl phenol. The stabilized polyols inhibit color formation when employed in the preparation of polyurethane foams.Type: GrantFiled: December 30, 1974Date of Patent: May 3, 1977Assignee: BASF Wyandotte CorporationInventors: Arthur L. Austin, William W. Levis, Jr., John T. Patton, Jr.
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Patent number: RE36358Abstract: The invention pertains to flame retardant polyurethane foams prepared by the reaction of a polyoxyalkylene polyether polyol with an organic polyisocyanate and a blowing agent wherein melamine is incorporated as the sole flame retardant compound. The amount of melamine may range from about 10 weight percent to about 55 weight percent of the total composition.Type: GrantFiled: July 16, 1996Date of Patent: October 26, 1999Assignee: BASF CorporationInventors: Egil Grinbergs, William W. Levis, Jr., Steven D. Gagnon