Patents Assigned to National Starch & Chemical Corporation
  • Aerosol hair spray compositions
    Patent number: 4315910
    Abstract: Aerosol hair spray compositions employing carbon dioxide or hydrocarbon propellents are improved with respect to shelf stability and solubility of the resin by the addition of water.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: February 16, 1982
    Assignee: National Starch and Chemical Corporation
    Inventors: Frank A. Nowak, Jr., Albert L. Micchelli
  • Curing agents for epoxy resins
    Patent number: 4312974
    Abstract: Novel unitary, storable, heat-curable epoxy resin systems are prepared which contain a polyepoxide and a curing amount of a salt of piperazine and a C.sub.3 -C.sub.21 polycarboxylic acid. In a preferred aspect the salt is present in a stoichiometric amount. The resin system is cured into an insoluble, infusible resin product by heating thereof at a temperature greater than 50.degree. C., preferably 50.degree.-250.degree. C., for a time sufficient to complete the cure.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: January 26, 1982
    Assignee: National Starch and Chemical Corporation
    Inventor: Wen B. Chiao
  • Aqueous newsprint inks
    Patent number: 4310356
    Abstract: In an improved process for printing newsprint paper with a light-weight keyless printing press system the mineral oil ink standardly used is replaced by an aqueous newsprint ink having a total solids content of about 13-80% and containing about 2-30% of a colorant consisting of a pigment and/or dye, about 3-60% of a dispersed starch, and water to total 100%, wherein the percentages are by weight based on total weight of the ink. The ink may optionally contain a viscosity stabilizer if necessary to prevent retrogradation of the starch or a thickener. In a preferred embodiment the pigment is carbon black and the starch is a dextrin or waxy fluidity starch.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: January 12, 1982
    Assignees: National Starch and Chemical Corporation, Synres Chemical Corporation
    Inventors: Paolo C. Trubiano, Aaron Y. Cohen
  • Stable, pumpable, solvent-free colloidal polyampholyte latices, their preparation and use in paper
    Patent number: 4305860
    Abstract: Stable, pumpable, solvent-free polyampholyte latices characterized by their colloidal nature, as well as by a solids content of about 10 to 40% by weight and a RVF Brookfield bulk viscosity of up to 20,000 centipoises at 25.degree. C. and 20 RPM, are prepared by polymerizing 10-30 mole % of a cationic monomer, 5-30 mole % of an anionic monomer, 15-35 mole % of a hydrophobic monomer, and 5-70 mole % of a non-ionic hydrophilic monomer. The monomer amounts are selected so as to provide a copolymer having a charge density of about 15 to 60 mole % and charge ratio of between about 0.33 and 6. The polymerization is carried out without the use of solvents. The performance of the latices as pigment retention and drainage aids is unexpectedly good.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: December 15, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Carmine P. Iovine, Dilip K. Ray-Chaudhuri
  • Novel N-(alkyl)-N-(2-haloethyl)-aminomethylphosphonic acids, a method for the preparation thereof and their use in the preparation of starch ether derivatives
    Patent number: 4297299
    Abstract: Starch ether derivatives are prepared by reacting a starch base with N-(2-haloethyl)iminobis(methylene)diphosphonic acid or with a N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acid. The derivatives contain aminophosphonic acid groups (or their salts) as zwitterion substituents which consist of either one or two anionic methylene phosphonic acid groups bound to a cationic nitrogen. Their cationic or anionic characteristics may be increased by introducing suitable cationic or anionic groups either by simultaneous reaction with the aminophosphonic acid reagent or by consecutive reaction either prior to or subsequent to the aminophosphonic acid reaction. They are especially useful as pigment retention aids in paper making processes. The N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acids are new reagents prepared by reacting a N-(2-haloethyl)alkylamine hydrohalide (e.g.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: October 27, 1981
    Assignee: National Starch and Chemical Corporation
    Inventor: Martin M. Tessler
  • Blocked isocyanate diols and preparation thereof
    Patent number: 4284572
    Abstract: Copolymerizable blocked isocyanate diols are prepared by reacting a blocking agent with an isocyanate group of an organic diisocyanate under controlled conditions, thereby forming a blocked isocyanate group, and reacting the second isocyanate group in a subsequent step with the amine portion of a selected amine diol under anhydrous conditions. The resultant products are used to prepare self-crosslinkable, linear polyurethanes of high molecular weight.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: August 18, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Henry Stanley, Dilip K. Ray-Chaudhuri
  • Continuous process for increasing discrete particle size of solution carboxyl polymers
    Patent number: 4283525
    Abstract: In an improved process for preparing discrete particles from solution polymers in which water and neutralizing agent are added to the polymer to form a suspension, the organic solvent is removed therefrom, and the particles are collected by filtration, washing and drying, the suspension is formed by co-feeding the flowable polymer and the aqueous phase containing neutralizing agent into a reactor vessel under specified conditions; stirring the reactants; and discharging the resultant suspension from the reactor vessel, with all steps being carried out in a continuous manner. In one embodiment of the process, additional neutralizing agent, which is preferably sodium hydroxide, is added to the suspension during removal of the solvent therefrom.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: August 11, 1981
    Assignee: National Starch and Chemical Corporation
    Inventor: Krishna K. Rao
  • Pollution-free cationization of starch
    Patent number: 4281109
    Abstract: Cationic starch is prepared by an essentially pollution-free method wherein starch is reacted with a mixture of an epoxide etherifying reagent and alkali catalyst using substantially dry reaction conditions. The resultant cationic starches find particular use in papermaking applications.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: July 28, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Wadym Jarowenko, Daniel B. Solarek
  • Clouding with a starch material
    Patent number: 4279940
    Abstract: Cow cockle starch is used to cloud fluids. It may be added directly to the fluid or, in the case of food and beverage products, to dry powder mixes, flavor concentrates, and/or syrups. When the product contains a non-essential oil flavorant, the starch provides the entire cloud. When the product contains an essential oil flavorant, the starch enhances the cloud.
    Type: Grant
    Filed: February 1, 1980
    Date of Patent: July 21, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Otto B. Wurzburg, Julianne M. Lenchin
  • Preparation of cationic starch graft copolymers from starch, N,N-methylenebisacrylamide, and polyamines
    Patent number: 4278573
    Abstract: Novel cationic starch-g-poly(N,N'-methylenebisacrylamide-co-amine) copolymers, useful as pigment retention aids for paper, are prepared by reacting a starch base with N,N'-methylenebisacrylamide and a polyamine or with preformed copolymer. The reactions are carried out at 15.degree. to 80.degree. C. for 0.5 to 20 hours under alkaline conditions using an aqueous slurry or dispersion of a starch base and preferably a salt such as sodium sulfate. The starch base may be derivatized, prior to the graft copolymerization, to introduce ether groups. The polyamines contain at least two amine groups selected from primary and secondary amines; preferably they contain up to 4 amine nitrogens, some of which may be unreactive tertiary amine nitrogens.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: July 14, 1981
    Assignee: National Starch and Chemical Corporation
    Inventor: Martin M. Tessler
  • Novel zwitterion polygalactomannan ether derivatives and a method for the preparation thereof
    Patent number: 4276414
    Abstract: Zwitterion polygalactomannan ether derivatives are prepared by reacting a polygalactomannan gum, such as guar gum or locust bean gum, with N-(2-haloethyl)iminobis(methylene)diphosphonic acid or with a N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acid. The derivatives contain aminophosphonic acid groups (or their salts) as zwitterion substituents which consist of either one or two anionic methylene phosphonic acid groups bound to a cationic nitrogen. Modified derivatives containing non-ionic, anionic, cationic, or cationogenic substituents may also be prepared.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: June 30, 1981
    Assignee: National Starch and Chemical Corporation
    Inventor: Martin M. Tessler
  • Shampoo compositions
    Patent number: 4273760
    Abstract: Hair conditioning shampoo compositions are described containing cationic polymers, anionic surfactants and optional nonionic surfactants. The shampoo compositions deposit the cationic polymer on the hair while the hair is washed using the shampoo, rendering the hair to be more manageable.
    Type: Grant
    Filed: September 14, 1979
    Date of Patent: June 16, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: F. Theodore Koehler, Albert L. Micchelli, Frank A. Nowak, Jr.
  • Stable gelatin dessert and process for making same
    Patent number: 4272557
    Abstract: A gelatin dessert prepared from a dessert powder containing gelatin, sugar and optionally flavor and color is improved by adding to the powder from about 0.5 to 5%, by weight, of guar gum, based on the weight of the powder. The guar gum imparts low-temperature stable properties to the gelatin dessert without substantially adversely affecting the physical appearance and texture thereof.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: June 9, 1981
    Assignee: National Starch and Chemical Corporation
    Inventor: Bernard H. Nappen
  • Preparation of guar gum
    Patent number: 4269975
    Abstract: Guar gum is prepared by hydrating guar splits with sufficient water to provide a total moisture content of 25-80%, extruding the hydrated splits, and grinding them, while wet, preferably to a finely divided state. For most uses the ground gum is then dried, preferably in a flash dryer. Typically the hydration is carried out at 5.degree.-95.degree. C. for at least 1/4 hour; the preferred conditions are 20.degree.-80.degree. C. for 0.5 to 2 hours. The extrusion is conveniently carried out in an extruder provided with a rotatable screw for transporting and working the hydrated splits. Typically grinding is carried out in a hammermill.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: May 26, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Morton W. Rutenberg, Thomas R. Molnar
  • Co-curing agents for epoxy resins
    Patent number: 4268656
    Abstract: A N-substituted piperazine or N-substituted homopiperazine adduct with a polyepoxide is used as a co-curing agent in epoxy resin systems containing a polyepoxide and a known curing agent such as dicyandiamide, a carboxylic acid anhydride, or a dihydrazide. The preferred adducts have a ratio of epoxy groups to secondary amino groups of between 1.2:1 and 3:1. The preferred polyepoxides are polyglycidyl ethers of 4,4'-isopropylidenediphenol (bisphenol A). Suitable adducts are prepared from N-methyl-, N-(2-hydroxyethyl)-, N-octyl-, N-phenyl- and N-benzyl piperazine and N-methyl homopiperazine.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: May 19, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Dilip K. Ray-Chaudhuri, Wen B. Chiao, Jules E. Schoenberg
  • Novel starch ether derivatives, a method for the preparation thereof
    Patent number: 4260738
    Abstract: Starch ether derivatives are prepared by reacting a starch base with N-(2-haloethyl)iminobis(methylene)diphosphonic acid or with a N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acid. The derivatives contain aminophosphonic acid groups (or their salts) as zwitterion substituents which consist of either one or two anionic methylene phosphonic acid groups bound to a cationic nitrogen. Their cationic or anionic characteristics may be increased by introducing suitable cationic or anionic groups either by simultaneous reaction with the aminophosphonic acid reagent or by consecutive reaction either prior to or subsequent to the aminophosphonic acid reaction. They are especially useful as pigment retention aids in paper making processes.
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: April 7, 1981
    Assignee: National Starch and Chemical Corporation
    Inventor: Martin M. Tessler
  • Process for the production of paper containing starch fibers and the paper produced thereby
    Patent number: 4243480
    Abstract: A process for the production of paper and paperboard is disclosed wherein water-insensitive starch fibers, produced by extrusion of a starch dispersion into a coagulating solution, are employed to replace all or part of the cellulosic or other pulp conventionally employed. There is also disclosed a method for the incorporation of functional additives into paper during the production thereof; and a method for binding fibers in non-woven webs.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: January 6, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Henry R. Hernandez, Donald S. Greif, Albert N. Barna, Douglas S. Thornton
  • Novel starch ether derivatives, a method for the preparation thereof and their use in paper
    Patent number: 4243479
    Abstract: Starch ether derivatives are prepared by reacting a starch base with N-(2-haloethyl)iminobis(methylene)diphosphonic acid or with a N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acid. The derivatives contain aminophosphonic acid groups (or their salts) as zwitterion substituents which consist of either one or two anionic methylene phosphonic acid groups bound to a cationic nitrogen. Their cationic or anionic characteristics may be increased by introducing suitable cationic or anionic groups either by simultaneous reaction with the aminophosphonic acid reagent or by consecutive reaction either prior to or subsequent to the aminophosphonic acid reaction. They are especially useful as pigment retention aids in paper making processes.
    Type: Grant
    Filed: August 15, 1979
    Date of Patent: January 6, 1981
    Assignee: National Starch and Chemical Corporation
    Inventor: Martin M. Tessler
  • Modified polyurethane adhesive compositions containing a carbamate ester additive useful in laminating substrates
    Patent number: 4242488
    Abstract: A modified polyurethane adhesive composition characterized by its improved viscosity and high initial bond strength contains an isocyanate-terminated prepolymer or a fully reacted polyurethane and a carbamate ester which is compatible and not reactive with the prepolymer or polyurethane. The resultant adhesive is suitable for laminating many types of substrates. In a preferred embodiment the prepolymer is employed with the carbamate ester in a reactive hot-melt adhesive for use in bonding flexible substrates.
    Type: Grant
    Filed: May 9, 1979
    Date of Patent: December 30, 1980
    Assignee: National Starch and Chemical Corporation
    Inventors: Henry Stanley, Dilip K. Ray-Chaudhuri
  • Anaerobic curing adhesive composition and process for making same
    Patent number: 4235986
    Abstract: Storage-stable anaerobic curing adhesive compositions useful as anaerobic adhesives and sealants are prepared by first mixing a polymerizable acrylate ester monomer, an inhibitor for free radical polymerization, a chelator, and at least an effective amount of an accelerator system consisting of an organic cyclic sulfimide, preferably saccharin, and an aromatic tertiary amine. The resultant homogeneous mixture is thereafter heated at a temperature of about 45.degree.-100.degree. C. for a period of time sufficient to provide the composition with anaerobic curing properties and a specified minimum amount of active oxygen. In one embodiment, the mixture is stirred at a temperature of 45.degree.-70.degree. C. for 10-24 hours. In another embodiment, the mixture is maintained at an elevated temperature without stirring.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: November 25, 1980
    Assignee: National Starch and Chemical Corporation
    Inventor: William J. Catena