Patents Assigned to Stepan Company
  • Publication number: 20090247657
    Abstract: A polyurethane-modified polyisocyanurate (PU-PIR) foam exhibiting improved thermal stability is provided. The foam has incorporated therein a high molecular weight ammonium polyphosphate (APP). APP is employed as a partial or complete substitute for flame retardants conventionally employed in PU-PIR foams. The foams of the invention exhibit excellent and improved thermal stability characteristics as compared to foams to which no APP has been added.
    Type: Application
    Filed: April 1, 2008
    Publication date: October 1, 2009
    Applicant: Stepan Company
    Inventors: Warren A. Kaplan, Angelo R. Gabbianelli, David J. Norberg
  • Patent number: 7423167
    Abstract: Disclosed are ethylenically unsaturated amine salts of sulfonic, phosphoric and carboxylic acids. The salts are surface active agents which are useful in a variety of applications as primary and/or secondary surfactants. The salts are especially useful as surfactants in emulsion polymerization reactions.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: September 9, 2008
    Assignee: Stepan Company
    Inventor: Alfred K. Schultz
  • Publication number: 20070191619
    Abstract: A process to refine esters of conjugated linoleic acids via distillation in a single or multi-pass distillation operation is provided. Thermal rearrangement of conjugated linoleic acid components during distillation is prevented or reduced by the use of a low residence time and/or reduced pressure distillation apparatus. A process to produce refined esters of conjugated linoleic acids is also provided. The process transesterifies a linoleic acid-containing oil to generate an alkyl ester composition which further undergoes isomerization at a temperatures typically between about 90-140° C. to form an ester stream containing conjugated linoleic acid esters, which is then distilled to obtain the refined esters of conjugated linoleic acids. The transesterification and isomerization steps can be performed in one reaction vessel without an intervening distillation step. The transesterification and isomerization steps can occur concurrently in a continuous reaction system using a dual reaction zone apparatus.
    Type: Application
    Filed: December 23, 2003
    Publication date: August 16, 2007
    Applicant: Stepan Company
    Inventors: Joseph Rongione, Jenifer Galante, Steven Clauss, Randal Bernhardt, Phouvieng Xayariboun
  • Patent number: 7256306
    Abstract: This invention relates new and improved processes for the preparation of arylalkylsulfonic acids derived from aromatic or substituted aromatic molecules and AOS acid (generally a mixture of alkenesulfonic acid and sultones, produced from the sulfonation of alpha olefins) and to cleaning compositions comprising said arylalkylsulfonic acids. The invention involves the use of a superacid catalyst to effectuate the conversion of AOS acid and aromatic reactants to arylalkylsulfonic acid under substantially anhydrous conditions, whereby a substantial improvement in the rate of conversion of the reactants to arylalkylsulfonic acid and/or improvement in mono-alkylation selectivity is realized, as compared to methods of preparation previously disclosed. Also useful as an alkylation promoter is the arylalkylsulfonic acid reaction product itself, produced in situ or from a previous reaction (i.e., a self-catalyst heel).
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: August 14, 2007
    Assignee: Stepan Company
    Inventors: Gregory P. Dado, Randal H. Bernhardt
  • Patent number: 7026418
    Abstract: Disclosed is an improved method of making polymers. The method utilizes at least one ethylenically unsaturated monomer and at least one polymerizable surface active agent. The polymerizable surface active agent is capable of co-polymerization with traditional monomers and/or polymerization with itself (i.e. homopolymerization) and is preferably substantially completely consumed during the course of the polymerization. Polymers produced by the method of the present invention are well suited for use in coatings, adhesives, sealants, elastomers and the like, as they form stable films, possess excellent adhesion properties and have improved hydrolytic stability characteristics. The present invention also encompasses homopolymeric surface active agents and their use in polymerization reactions.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: April 11, 2006
    Assignee: Stepan Company
    Inventors: Alfred K. Schulz, Adnan Siddiqui
  • Patent number: 7001879
    Abstract: Disclosed are automatic dryer added fabric conditioning articles and methods utilizing fabric conditioning compositions comprising from about 20 percent to about 80 percent by weight of a mixture of quaternary ammonium compounds, and between about 80 percent to about 20 percent by weight of a mixture of glycerin and glyceryl esters, wherein the fabric conditioning compositions possess a melting point of about 30° C. to about 65° C. The conditioning compositions of the present invention are preferably employed in combination with a dispensing means adapted for use in an automatic clothes dryer. The fabric conditioning compositions may be coated onto substrates, and the fabric conditioning articles thereby obtained used to impart softness and anti-static properties to fabric. The method portion of the invention involves the commingling of damp fabrics with the fabric conditioning compositions in an automatic clothes dryer to impart softness and anti-static properties to the fabric.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: February 21, 2006
    Assignee: Stepan Company
    Inventor: Matthew I Levinson
  • Patent number: 6906025
    Abstract: Disclosed are automatic dryer added fabric conditioning articles and methods utilizing fabric conditioning compositions comprising from about 20 percent to about 80 percent by weight of a mixture of quaternary ammonium compounds, and between about 80 percent to about 20 percent by weight of a mixture of glycerin and glyceryl esters, wherein the fabric conditioning compositions possess a melting point of about 30° C. to about 65° C. The conditioning compositions of the present invention are preferably employed in combination with a dispensing means adapted for use in an automatic clothes dryer. The fabric conditioning compositions may be coated onto substrates, and the fabric conditioning articles thereby obtained used to impart softness and anti-static properties to fabric. The method portion of the invention involves the commingling of damp fabrics with the fabric conditioning compositions in an automatic clothes dryer to impart softness and anti-static properties to the fabric.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: June 14, 2005
    Assignee: Stepan Company
    Inventor: Matthew Levinson
  • Patent number: 6900265
    Abstract: An improved method of making CASE materials is provided, wherein the method utilizes a polymer latex derived from at least one ethylenically unsaturated monomer and at least one polymerizable surface active agent. The polymerizable surface active agent is capable of co-polymerization with traditional monomers and is preferably substantially completely consumed during the course of the polymerization. Latex polymers produced by the method of the present invention are well suited for use in coatings, adhesives, sealants, elastomers. Additionally, the present invention relates to improved coating, adhesive, sealant and elastomer (CASE) materials utilizing polymer latexes derived from various monomers and ethylenically unsaturated amine salts of sulfonic, phosphoric and/or carboxylic acids.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: May 31, 2005
    Assignee: Stepan Company
    Inventors: Alfred K. Schultz, Adnan Siddiqui, Elaine R. Kleinfeld
  • Patent number: 6897327
    Abstract: A process to manufacture conjugated linoleic acid (CLA)-containing materials such as conjugated linoleic salts and acids that are enriched in desirable cis-9, trans-11- and trans-10, cis-12-CLA isomers and are low in certain undesirable isomers. The process generally entails isomerization of an alkyl ester of a linoleic acid-containing material at a temperature typically between about 90 to 140° C. to effectuate conjugation of the double bonds, followed by saponification of the resultant CLA-containing fatty acid ester to produce a CLA-containing fatty acid salt, optionally followed by neutralization of the CLA-containing fatty acid salt with an acid source to produce a CLA-containing fatty acid.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: May 24, 2005
    Assignee: Stepan Company
    Inventors: Joseph C. Rongione, Jenifer Heydinger Galante, Steven L. Clauss, Randal J. Bernhardt, Phouvieng Xayariboun
  • Patent number: 6855844
    Abstract: Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such polyester-ether polyols using double metal cyanide catalysts are disclosed, along with methods for producing urethane prepolymers. The polyester-ether polyols of the instant invention are preferably the reaction product of phthalic anhydride, diethylene glycol, and propylene oxide. These polyester-ether polyols are useful as either the primary polyol in urethane compositions or in combination with conventional auxiliary polyester- and/or polyether-based polyols. The polyester-ether polyols impart greatly improved solubility and compatibility to mixtures of either polyether and/or polyester polyols. The polyester-ether polyols of the instant invention are desirably of lower viscosity than their precursor intermediate polyester polyols and are generally soluble in either polyester- and/or polyether-based polyols.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: February 15, 2005
    Assignee: Stepan Company
    Inventors: Eric J. Geiger, Douglas K. Hillshaffer
  • Publication number: 20040254387
    Abstract: A method for making biodiesel from a vegetable oil source is described. The method involves simultaneously reacting the free fatty acids and glycerides of the vegetable oil source with methanol, under pressure up to 250 psig, into fatty acid alkyl esters for use as biodiesel. The conversion is catalyzed by an acid at temperatures between about 80° C. to about 200° C.
    Type: Application
    Filed: April 21, 2004
    Publication date: December 16, 2004
    Applicant: Stepan Company
    Inventors: Franz J. Luxem, William M. Troy
  • Patent number: 6822105
    Abstract: A method for making alkylesters, or methylester specifically, such as biodiesel, from an oil source is described. The method involves converting the free fatty acids of the oil source into a mixture of mono-, di-, and tri-glycerides and subsequently transesterifying the newly formed glycerides as well as the originally present glycerides into fatty acid alkyl esters.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: November 23, 2004
    Assignee: Stepan Company
    Inventors: Franz J. Luxem, Jenifer Heydinger Galante, William M. Troy, Randall R. Bernhardt
  • Patent number: 6768015
    Abstract: A method for making alkyl esters, or methylester specifically, such as biodiesel, from an oil source is described. The method involves simultaneously reacting the free fatty acids and glycerides of the oil source with methanol, under pressure up to 500 psia, into fatty acid alkyl esters. The conversion is catalyzed by an acid at temperatures between about 80° C. to about 200° C.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: July 27, 2004
    Assignee: Stepan Company
    Inventors: Franz J. Luxem, William M. Troy
  • Publication number: 20040137546
    Abstract: A method for determining the glycerin content of a biodiesel sample is provided which utilizes the conversion of the glycerin content of the biodiesel sample into a colored compound, preferably quinoneimine dye. The concentration of the colored compound, preferably quinoneimine dye, in the biodiesel sample may then be measured and converted to a concentration of glycerin in the biodiesel sample.
    Type: Application
    Filed: December 22, 2003
    Publication date: July 15, 2004
    Applicant: Stepan Company
    Inventor: Stacey J. Greenhill
  • Publication number: 20040092632
    Abstract: An improved method of making CASE materials is provided, wherein the method utilizes a polymer latex derived from at least one ethylenically unsaturated monomer and at least one polymerizable surface active agent. The polymerizable surface active agent is capable of co-polymerization with traditional monomers and is preferably substantially completely consumed during the course of the polymerization. Latex polymers produced by the method of the present invention are well suited for use in coatings, adhesives, sealants, elastomers. Additionally, the present invention relates to improved coating, adhesive, sealant and elastomer (CASE) materials utilizing polymer latexes derived from various monomers and ethylenically unsaturated amine salts of sulfonic, phosphoric and/or carboxylic acids.
    Type: Application
    Filed: April 10, 2002
    Publication date: May 13, 2004
    Applicant: Stepan Company
    Inventors: Alfred K. Schultz, Adnan Siddiqui, Elaine R. Kleinfeld
  • Publication number: 20040076829
    Abstract: Disclosed are automatic dryer added fabric conditioning articles and methods utilizing fabric conditioning compositions comprising from about 20 percent to about 80 percent by weight of a mixture of quaternary ammonium compounds, and between about 80 percent to about 20 percent by weight of a mixture of glycerin and glyceryl esters, wherein the fabric conditioning compositions possess a melting point of about 30° C. to about 65° C. The conditioning compositions of the present invention are preferably employed in combination with a dispensing means adapted for use in an automatic clothes dryer. The fabric conditioning compositions may be coated onto substrates, and the fabric conditioning articles thereby obtained used to impart softness and anti-static properties to fabric. The method portion of the invention involves the commingling of damp fabrics with the fabric conditioning compositions in an automatic clothes dryer to impart softness and ani-static properties to the fabric.
    Type: Application
    Filed: October 7, 2003
    Publication date: April 22, 2004
    Applicant: Stepan Company
    Inventor: Matthew Levinson
  • Publication number: 20040071653
    Abstract: Disclosed are antimicrobial compositions comprising
    Type: Application
    Filed: October 2, 2003
    Publication date: April 15, 2004
    Applicant: Stepan Company
    Inventors: Daniela T. Bratescu, Randal J. Bernhardt
  • Patent number: 6664363
    Abstract: The present invention relates to low viscosity aromatic polyester polyols having an average functionality of two and methods for preparing such polyols. In particular, the invention relates to low viscosity aromatic polyester polyols prepared by reacting a phthalic acid based material with diethylene glycol, a higher functional polyol having an average functionality of greater than two and a long chain alkyl acid, ester or oil. The resulting aromatic polyester polyol has an average functionality of two and has a lower dynamic viscosity as compared to the esterification product of a phthalic acid based material with diethylene glycol alone.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: December 16, 2003
    Assignee: Stepan Company
    Inventor: James A. Faunce
  • Publication number: 20030149119
    Abstract: Disclosed are ethylenically unsaturated amine salts of sulfonic, phosphoric and carboxylic acids. The salts are surface active agents which are useful in a variety of applications as primary and/or secondary surfactants. The salts are especially useful as surfactants in emulsion polymerization reactions.
    Type: Application
    Filed: January 13, 2003
    Publication date: August 7, 2003
    Applicant: Stepan Company
    Inventor: Alfred K. Schultz
  • Patent number: 6569352
    Abstract: Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such polyester-ether polyols are disclosed, along with methods for producing urethane prepolymers. The polyester-ether polyols of the instant invention are preferably the reaction product of phthalic anhydride, diethylene glycol, and propylene oxide. These polyester-ether polyols are useful as either the primary polyol in urethane compositions or in combination with conventional auxiliary polyester- and/or polyether-based polyols. The polyester-ether polyols impart greatly improved solubility and compatibility to mixtures of either polyether and/or polyester polyols. The polyester-ether polyols of the instant invention are desirably of lower viscosity than their precursor intermediate polyester polyols and are generally soluble in either polyester- and/or polyether-based polyols.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: May 27, 2003
    Assignee: Stepan Company
    Inventors: Douglas K. Hillshafer, George Magnus