Patents by Inventor Lawrence R. Brecker

Lawrence R. Brecker 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).

  • Patent number: 6303808
    Abstract: A process for making a product containing tin (II) carboxylates of the formula (RCOO)2−n(OOCR′)n, where each R, which may be the same or different, is hydrogen or a C1-C40 hydrocarbyl group, each R′, which may be the same or different, is a C1-C40 hydrocarbyl group, and n is 0, 1, or 2 the process comprising: (a) forming a reaction mixture by combining elemental tin, a promoter, and one or more carboxylate-containing compounds of the formula R(CO)X, where R is hydrogen or a C1-C40 hydrocarbyl group and X is a hydroxyl group, a halogen atom, or O(CO)R′, where R′ is a C1-C40 hydrocarbyl group; (b) heating the reaction mixture to form heated reaction mixture; (c) oxidizing the heated reaction mixture using an oxygen-containing gas to form an oxidized reaction mixture containing tin (II) carboxylates as well as tin (IV) carboxylates; and (d) reducing the oxidized reaction mixture with elemental tin to convert at least a portion of the tin (IV) carboxylates to tin (II) carboxylate
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: October 16, 2001
    Assignee: Crompton Corporation
    Inventors: Vasilije Knezevic, Lawrence R. Brecker, Michael Fisch, Philip J. Kleinlauth, Radu Bacalogu
  • Patent number: 6225510
    Abstract: A process for production of a t-alkyl peroxide compound includes the steps of: a) reacting an n-alkyl t-alkyl ether with a reactant mixture comprising an acid catalyst and a compound of the formula RO2H  (I)  where R is H or t-alkyl, provided that if R is t-alkyl the t-alkyl peroxide compound product is a di-t-alkyl peroxide, and b) isolating a reaction product comprising said t-alkyl peroxide compound from the mixture resulting from step a). The process can be used to prepare t-butyl hydroperoxide or di-t-butyl peroxide from methyl t-butyl ether. Sulfuric acid may be used as the acid catalyst.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: May 1, 2001
    Assignee: Crompton Corporation
    Inventors: Peter Frenkel, Ted M. Pettijohn, Lawrence R. Brecker
  • Patent number: 5888427
    Abstract: An overbased mixture of aliphatic and aromatic carboxylates salts useful in making low-fogging thermal stabilizers for PVC is made by reacting zinc oxide with fatty acid and such as stearic acid, then adding aromatic acids, and then adding and reacting one or both of magnesium oxide and calcium oxide, under controlled heating conditions to maintain fluidity while minimizing side reactions, and then conditioning the reaction product to remove volatiles.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: March 30, 1999
    Assignee: Witco Corporation
    Inventors: Lawrence R. Brecker, Radu Bacaloglu, Michael Fisch, Mukund Shah, Otto Loeffler
  • Patent number: 5656202
    Abstract: An overbased mixture of aliphatic and aromatic carboxylates salts useful in making low-fogging thermal stabilizers for PVC is made by reacting zinc oxide with fatty acid and such as stearic acid, then adding aromatic acids, and then adding and reacting one or both of magnesium oxide and calcium oxide, under controlled heating conditions to maintain fluidity while minimizing side reactions, and then conditioning the reaction product to remove volatiles.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: August 12, 1997
    Assignee: Witco Corporation
    Inventors: Lawrence R. Brecker, Radu Bacaloglu, Michael Fisch, Mukund Shah, Otto Loeffler
  • Patent number: 4579672
    Abstract: There are disclosed functional fluids and lubricating compositions containing a minor amount of an oil-soluble alkoxypolyethyleneoxy acid phosphite ester additive which provides improved water tolerance properties to the compositions.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: April 1, 1986
    Assignees: Exxon Research & Engineering Co., Argus Chemical Corporation
    Inventors: Lawrence R. Brecker, Otto E. Loeffler, Charles Abramoff, William K. Cleveland, Susan J. Wosatka
  • Patent number: 4500665
    Abstract: Codispersed particulate lubricant stabilizer compositions for synthetic resins are provided, the particles consisting essentially of from about 4 parts to about 1 part polyvalent fatty acid soap homogeneously codispersed with from 1 part to about 4 parts alkylene bis(fatty acid amide); as well as synthetic resin compositions containing the same.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: February 19, 1985
    Assignee: Argus Chemical Corporation
    Inventors: Lawrence R. Brecker, Charles Keeley
  • Patent number: 4447569
    Abstract: Polyvinyl chloride resin compositions are provided, suitable for use as electrical insulation material, having a high volume resistivity and a high resistance to deterioration when heated at temperatures above 100.degree. C., comprising as the essential ingredients a polyvinyl chloride resin and, in the amounts indicated, in parts per one hundred of resin, from about 30 to about 100 parts mono or poly carboxylic acid ester plasticizer; from about 5 to about 25 parts filler; from about 1 to about 20 parts epoxy compound, and from about 1 to about 20 parts lead alkyl phenolate.
    Type: Grant
    Filed: October 8, 1982
    Date of Patent: May 8, 1984
    Assignee: Argus Chemical Corporation
    Inventors: Lawrence R. Brecker, Charles Keeley, Stuart D. Brilliant
  • Patent number: 4401779
    Abstract: Homogeneous liquid stabilizer systems imparting to polyvinyl chloride resins a heat and light stability comparable to or exceeding organotin stabilizers are provided which are substantially solvent-free and have a low viscosity and a minimum flash point of 96.degree. C.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: August 30, 1983
    Assignee: Argus Chemical Corporation
    Inventors: Kook J. Bae, Lawrence R. Brecker
  • Patent number: 4256618
    Abstract: Stabilizer compositions for rigid polyvinyl chloride resin compositions are provided comprising an antimony mercaptocarboxylic acid or ester and a mercaptocarboxylic acid ester in amounts within the range from about 90 to about 25 parts antimony mercaptocarboxylic acid or ester and from about 10 to about 75 parts mercaptocarboxylic acid ester; the amount of mercaptocarboxylic acid ester being selected within these ranges to synergize the stabilizing effectiveness of the antimony mercaptocarboxylic acid or ester.Rigid polyvinyl chloride resin compositions also are provided having their resistance to the development of early discoloration enhanced by a stabilizing amount of the antimony mercaptocarboxylic acid or ester and mercaptocarboxylic acid ester, the synergistic effect being particularly evidenced in rigid polyvinyl chloride resin compositions containing both an ortho-dihydric phenol and an alkaline earth metal carboxylate, such as catechol and calcium stearate.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: March 17, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Lawrence R. Brecker, Charles Keeley
  • Patent number: 4255320
    Abstract: Stabilizer mixtures are provided for rigid polyvinyl chloride resin compositions, capable of enhancing the resistance of the polyvinyl chloride resin to the development of an early discoloration during the first five to twenty minutes of heating at elevated processing temperatures, of the order of 375.degree. F. and higher, comprising a monoalkyltin 2-acyloxyethylmercaptide and/or a dialkyltin 2-acyloxyethylmercaptide inadmixture with an alkyltin sulfide.
    Type: Grant
    Filed: June 8, 1978
    Date of Patent: March 10, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Lawrence R. Brecker, Charles Keeley
  • Patent number: 4252705
    Abstract: The resistance of polyvinyl chloride resins to the development of yellow to orange reversible discoloration when heated in the presence of water at moderately elevated temperatures above 80.degree. C. up to about 160.degree. C. is improved by combining therewith an N,N'-diphenyl urea. Such reversible discoloration is not associated with any heat instability, and the resistance of the polyvinyl chloride resin to deterioration when heated at processing temperatures of 150.degree. C. and above is then improved by incorporation of the usual polyvinyl chloride resin heat stabilizers.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: February 24, 1981
    Assignee: Argus Chemical Corporation
    Inventor: Lawrence R. Brecker
  • Patent number: 4080364
    Abstract: Stabilizer mixtures that are capable of enhancing the resistance of polyolefins to degradation as a result of exposure to light and air, particularly at elevated temperatures, are obtained by reacting an .alpha.-olefin with an ester of a mercaptocarboxylic acid and a polyhydric alcohol, forming a reaction product of unknown structure containing thioether groups and carboxylic acid ester groups.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: March 21, 1978
    Assignee: Argus Chemical Corporation
    Inventors: Otto S. Kauder, Lawrence R. Brecker