Patents by Inventor Stanley R. Sandler

Stanley R. Sandler 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: 4845270
    Abstract: The present invention discloses the use of propanone 1,3-disulfonic acid as an esterification catalyst. This catalyst has a significantly higher reaction rate when compared to conventional esterification catalysts, such as methanesulfonic acid and sulfuric acid.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: July 4, 1989
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4812596
    Abstract: A process is provided for converting waste distillation bottoms containing t-alkylphenols with substantial unknown constituents to useable para-t-alkylphenols. The process comprises heating the waste distillation bottoms with phenol and an acid catalyst to effect transalkylation. The waste distillation bottoms typically result from the production of para-t-alkylphenol and/or 2,4-di-t-alkylphenol.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: March 14, 1989
    Assignee: Pennwalt Corporation
    Inventors: Altaf Husain, Stanley R. Sandler
  • Patent number: 4678842
    Abstract: Compositions of poly(fluoroacetylene) useful for providing electrically conductive properties to plastics by a method of dehydrofluorination of saturated fluoroethylene polymers.
    Type: Grant
    Filed: November 29, 1984
    Date of Patent: July 7, 1987
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4546205
    Abstract: An amino/phenolic composition effective for enhancing the storage stability of aldehydes, particularly sulfur-containing aliphatic aldehydes of low molecular weight, i.e., those containing from 3 to 10 carbon atoms.
    Type: Grant
    Filed: June 16, 1982
    Date of Patent: October 8, 1985
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4486551
    Abstract: A flame retardant, halogenated polyol having the formula ##STR1## wherein R is an aliphatic radical substituted with at least 2 hydroxyl groups, X is a halogen, and X' is a halogen or hydrogen, is used in the reaction mixture for preparing flame retarded polyurethanes.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: December 4, 1984
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Joseph M. Bohen
  • Patent number: 4397977
    Abstract: A flame retarded composition containing tetrahalophthalate plasticizer and a halogenated resin is provided.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: August 9, 1983
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4393248
    Abstract: A flame retardant, halogenated polyol having the formula ##STR1## wherein R is an aliphatic radical substituted with at least 1 hydroxyl groups, X is a halogen, and X' is a halogen or hydrogen, is used in the reaction mixture for preparing flame retarded polyurethanes.
    Type: Grant
    Filed: August 20, 1981
    Date of Patent: July 12, 1983
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Joseph M. Bohen
  • Patent number: 4356274
    Abstract: Smoke suppressed rigid polyurethane foams are prepared from a reaction mixture comprising as the smoke suppressant additive a metal salt of a: dialkyl dithiocarbamate, a mercaptobenzothiazole, a 2,5-dimercapto-1,3,4-thiadiazole, a mercaptotriazine, a hydroxy thiophenol or an aliphatic dimercapto compound of 2 to 10 carbons.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: October 26, 1982
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Jeffrey D. Miano
  • Patent number: 4349688
    Abstract: Polyoxyalkylene polycarboxylate ester is used for imparting soil release properties to textiles such as all polyester fabric either alone or in combination with other textile chemicals.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: September 14, 1982
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4324910
    Abstract: A substituted urea compound containing at least one 2,2,2-trichloro-1-hydroxyethyl group is provided which is useful as a flame retardant for polymers such as polyurethane.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: April 13, 1982
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Mabel M. Chen
  • Patent number: 4307010
    Abstract: Zeolites and metal-ion exchanged zeolite are used to impart smoke suppressant characteristics to halogenated polymers.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: December 22, 1981
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, John C. Wetzel
  • Patent number: 4302340
    Abstract: A flame retardant polyol composition is prepared by reacting chloral with a compound selected from the group consisting of urea, diethanolurea, dipropanolurea, thiourea, sulfamide and mixtures thereof in the presence of a polyhydroxy composition having 2 to 8 hydroxy groups. These compositions are useful for preparing flame retardant polyurethane foams.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: November 24, 1981
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Mabel M. Chen
  • Patent number: 4299782
    Abstract: This invention relates to novel phosphorus derivatives of 1,3-diethanolurea and certain polymeric reaction products such as polyurethane resins in which they are incorporated.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: November 10, 1981
    Assignee: Pennwalt Corporation
    Inventors: Mabel M. M. Chen, Stanley R. Sandler
  • Patent number: 4298517
    Abstract: A flame retarded composition containing tetrahalophthalate plasticizer and a halogenated resin is provided.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: November 3, 1981
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4293454
    Abstract: A flame retardant composition is prepared by reacting chloral with a nitrogen compound having the formula: ##STR1## wherein: (a) X= ##STR2## or, --SO.sub.2 --; (b) Z is selected from O or S;(c) R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from the group consisting of H, alkyl of 1 to 6 carbons, and substituted or unsubstituted hydroxyalkyl of 2 to 4 carbons and mixtures thereof in a temperature range of 25.degree. to 100.degree. C., in the absence of a solvent and in an apparatus that provides efficient mixing. These compositions are useful for preparing flame retardant polyurethane foams.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: October 6, 1981
    Assignee: Pennwalt Corporation
    Inventors: Harold G. Monsimer, Stanley R. Sandler
  • Patent number: 4290765
    Abstract: Polyoxyalkylene polycarboxylate ester is used for imparting soil release properties to textiles such as all polyester fabric either alone or in combination with other textile chemicals.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: September 22, 1981
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4276387
    Abstract: A compound of Formula I: ##STR1## is useful as flame retardants for polyurethane foams. It is added directly to the reaction mixture for the preparation of the polyurethane foam.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: June 30, 1981
    Assignee: Pennwalt Corporation
    Inventors: Jeffrey D. Miano, Stanley R. Sandler
  • Patent number: 4226948
    Abstract: A rigid polyurethane foam is prepared from a reaction mixture incorporating therein a 2-trichloromethyloxazolidine or a thiazolidine derivative for imparting to the foam smoke and flame retardancy.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: October 7, 1980
    Assignee: Pennwalt Corporation
    Inventors: Ivan C. Popoff, Stanley R. Sandler
  • Patent number: 4208321
    Abstract: Polyesters, polyamides and polyester-polyamides are flame retarded by incorporating a flame retardant amount of selected poly(metal phosphinate)s with the resins. The poly(metal phosphinates)s can be incorporated with the resins either by admixture of the poly(metal phosphinate)s with the polyester or polyamide or by adding the poly(metal phosphinate)s to the polyester or polyamide polymerization reaction whereby the poly(metal phosphinate)s become a part of the polymer structure.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: June 17, 1980
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4208322
    Abstract: Polyesters, polyamides and polyester-polyamides are flame retarded by incorporating a flame retardant amount of selected poly(metal phosphinate)s with the resins. The poly(metal phosphinate)s can be incorporated with the resins either by admixture of the poly(metal phosphinate)s with the polyester or polyamide or by adding the poly(metal phosphinate)s to the polyester or polyamide polymerization reaction whereby the poly(metal phosphinate)s become a part of the polymer structure.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: June 17, 1980
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler