Patents Assigned to National Starch & Chemical Corporation
  • Remoistenable adhesive compositions
    Patent number: 4575525
    Abstract: Remoistenable adhesive compositions are prepared from ethylene vinyl acetate resin latices which have been polymerized utilizing dextrin as the protective colloid. In a preferred embodiment of the invention, remoistenable adhesives characterized by superior adhesion to difficult stocks are prepared by post-addition of dextrin to the dextrin-emulsified ethylene vinyl acetate resin latex.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: March 11, 1986
    Assignee: National Starch and Chemical Corporation
    Inventors: Donald M. Wacome, Christopher T. Fazioli, Vincent A. Lauria
  • Compressible starches as binders for tablets or capsules
    Patent number: 4551177
    Abstract: A compressible starch, useful as a binder for tablets prepared by direct compression or dry granulation or as a binder-diluent for capsules, is prepared by treating a cold-water-insoluble, granular starch (e.g., corn or waxy corn starch) with an acid, and/or alpha-amylase enzyme at a temperature below the starch's gelatinization temperature. The treated starch is characterized by altered, weakened granules with a less dense interior and disrupted surface. The compressible starch when admixed with a wet granulation binder (e.g., pregelatinized starch) is useful as a binder for tablets prepared by wet granulation as well as direct compression or dry granulation or as a binder-diluent for capsules.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: November 5, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Paolo C. Trubiano, James J. Kasica
  • One-package aqueous latices containing alkaline-curable self-crosslinking polymers
    Patent number: 4546140
    Abstract: Shelf-stable, one-package aqueous latices, which are curable with or without the application of heat, consist essentially of an alkaline-curable, self-crosslinking emulsion polymer, selected organic metal salts, and water. The alkali, alkaline earth, or heavy metal salts of C.sub.1 -C.sub.6 organic acids (e.g., sodium acetate) are post-added to th polymer emulsion or present during the polymerization. The polymer typically comprises about 90-99.9% by weight of one or more vinyl polymerizable monomers (e.g., acrylates, vinyl esters, and ethylene) and 0.1-10% by weight of a polymerizable non-ionic or cationic self-crosslinking monomer containing halohydrin groups (e.g., 3-chloro-2-hydroxypropyl (meth)acrylate or the reaction product of epichlorohydrin and N,N-dimethylaminopropyl methacrylamide or methacrylate).
    Type: Grant
    Filed: August 2, 1984
    Date of Patent: October 8, 1985
    Assignee: National Starch and Chemical Corporation
    Inventor: Yen-Jer Shih
  • Sulfosuccinate, alkyl- and alkenyl sulfosuccinate, sulfomaleate, and disulfosuccinate half-esters of polygalactomannans
    Patent number: 4540778
    Abstract: Sulfosuccinate polygalactomannan half-esters, as well as the alkyl- and alkenyl-sulfosuccinates thereof, are prepared by reacting the gum with sulfosuccinic anhydride or a C.sub.1 -C.sub.22 -alkyl- or C.sub.3 -C.sub.22 -alkenyl sulfosuccinic anhydride. The reactions are carried out at about pH 7.5 in a two-phase system of solid gum slurried in an aqueous medium containing a water-miscible solvent. Sulfomaleate half-esters are prepared in a similar manner using sulfomaleic anhydride. Disulfosuccinate half-esters are prepared by reacting the sulfomaleate gum half-ester with sulfurous acid or a bisulfite salt such as sodium bisulfite.
    Type: Grant
    Filed: June 8, 1984
    Date of Patent: September 10, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Martin M. Tessler, Teresa A. Dirscherl, Otto B. Wurzburg
  • Apparatus for dispensing high viscosity thermoplastic materials
    Patent number: 4534493
    Abstract: Apparatus for dispensing high viscosity thermoplastic materials such as resins, sealants and hot melt adhesives from drums. The apparatus comprises a functional hollow cylinder vertically disposed with a screw extending through its length. The cylinder is attached to a movable platen which is positioned to enter the open container through the top and adapted to move downward to the container bottom. Heating means, for example, a serpentine heated coil is attached to the underside of the platen. In operation, the thermoplastic material in the container is melted or highly softened enabling the screw to "lift" the material in the upright cylinder to an opening or outlet provided in the upper portion of the cylinder.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: August 13, 1985
    Assignee: National Starch and Chemical Corporation
    Inventor: Roger H. Sedran
  • Hot-melt adhesives based on vinyl polymer
    Patent number: 4535140
    Abstract: A hot-melt adhesive especially useful in the construction of disposable diapers contains a vinyl polymer of 40-90% by weight of a C.sub.1 -C.sub.12 alkyl acrylate and 10-60% by weight of an alpha-olefin of C.sub.20 -C.sub.40, wherein the alkyl acrylate may be partially replaced with vinyl acetate or with a C.sub.6 -C.sub.12 olefin or with mixtures thereof, provided that the polymer contain at least 10% by weight of the alkyl acrylate. The adhesive may also contain a tackifying resin, a wax, an oil or a stabilizer depending on the specific end-use desired. In a preferred embodiment the polymer contains 20-45% by weight of the alpha-olefin.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: August 13, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Jules E. Schoenberg, Thomas P. Flanagan, Dilip K. Ray-Chaudhuri
  • High temperature stable adhesive compositions employing aromatic polyimide and polyisoimide bis-acetylene additives
    Patent number: 4532270
    Abstract: Novel curing compositions are prepared comprising an acrylic or substituted acrylic monomer and a normal polyimide or polyisoimide bis-acetylene additive.
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: July 30, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Robert D. Rossi, Dilip K. Ray-Chaudhuri
  • Process for coating foodstuff with batter containing high amylose flour for microwave cooking
    Patent number: 4529607
    Abstract: Frozen pre-fried convenience foodstuffs characterized by improved crispness are produced after foodstuffs coated with batter containing an effective amount of high amylose flour are partially cooked in hot fat or cooking oil, and subsequently cooked to completion by means of microwaving.
    Type: Grant
    Filed: June 28, 1984
    Date of Patent: July 16, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Julianne M. Lenchin, Harvey Bell
  • Disposable article constructions
    Patent number: 4526577
    Abstract: Styrene-butadiene block copolymers are used as hot melt bonding agents in the formation of disposable laminates by using multi-line adhesive application.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: July 2, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Robert C. Schmidt, Jr., Paul P. Puletti
  • Metal-filled polyimide/polyepoxide blends of improved electrical conductivity
    Patent number: 4519941
    Abstract: Metal-filled polyimide/polyepoxide blends, characterized by their improved electrical conductivity after curing over blends containing no polyepoxide, comprise carbinol-containing polyimides, conventional liquid polyepoxides, a solvent for the polyimide, noble metal powders (preferably silver), and optionally an amine catalytic curing agent. Conductivity improvements of 100-1000 fold or more are observed.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: May 28, 1985
    Assignee: National Starch and Chemical Corporation
    Inventor: Stephen P. Anderson
  • Drilling mud dispersants
    Patent number: 4518510
    Abstract: Dispersants useful in aqueous drilling mud formulations employed in the drilling of subterranean wells where high temperature and high pressure environments are encountered are disclosed. The dispersants, when used in amounts of about 0.1 to 25 ppb provide muds containing colloidal material suspended in an aqueous medium with improved high temperature and high pressure stability. The dispersants are water soluble sulfonated vinyl toluene-maleic anhydride copolymers which have a molar ratio of vinyl toluene to maleic anhydride of about 1:1 to less than about 2:1, a molecular weight of 1,000 to 25,000 and at least about 0.7 sulfonic acid groups per vinyl toluene unit.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: May 21, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Patricia A. Gleason, Ingrid E. Brase
  • Process for preparing fiberboard
    Patent number: 4517240
    Abstract: In a one-step process for preparing fiberboard, an aqueous treating composition comprising about 3-20%, preferably 5-15%, by weight of an acrylic or vinyl acetate emulsion or solution polymer and about 0.05 to 3.0% by weight of a fluid, water-soluble organosilicone copolymer of dimethylpolysiloxane-polyalkylene ether is applied to the fiber panel prior to final compression. The treating composition acts both as a platen release agent during compression and a tempering agent for imparting water-resistance.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: May 14, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Arthur A. Tracton, John N. Guidice
  • Process for reacting quaternary ammonium monomer in the presence of anionic polymers
    Patent number: 4517351
    Abstract: Quaternary ammonium monomers and monomers copolymerizable therewith are reacted in the presence of anionic polymers to directly form a dry coacervate by a process which comprises forming a solution comprising the monomer(s), the anionic polymer, solvent(s) and a free-radical initiator and simultaneously polymerizing and drying the solution at a temperature above the boiling point of the solvent.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: May 14, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Chester D. Szymanski, Dennis Neigel
  • Converted starches for use as a fat- or oil-replacement in foodstuffs
    Patent number: 4510166
    Abstract: Converted starches, which with water form gels having a neutral taste and perferably a creamy, smooth consistency, are suitable as fat-and/or oil-replacements in various foodstuffs, especially high fat-and/or oil-containing foodstuffs such as ice cream and mayonnaise.The starches (e.g., tapioca, corn, or potato) have a DE of less than 5 and their aqueous dispersions have a hot flow viscosity of at least about 10 sec. at 10-50% solids, and they are capable of forming gels having a strength of at least about 25 g. within 24 hrs. and 4.degree. C. at 10-50% solids. The preferred starches are tapioca dextrins having a DE of about 2 or less and hot flow viscosity and gel strength of about 20-100 sec. and 65-930 g. at 25-35% solids. Acid- and enzyme-converted starches are also suitable.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: April 9, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Julianne M. Lenchin, Paolo C. Trubiano, Stella Hoffman
  • Aromatic diamines
    Patent number: 4506100
    Abstract: Novel polyimides, optionally end-capped with polymerizable or inert groups, and the polyamic acid or ester intermediates thereof are prepared by reacting a tetracarboxylic acid compound (e.g. pyromellitic dianhydride or 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride or its methyl diester) with diamines having the general formula ##STR1## wherein Z is oxygen or sulfur, X and/or Y are carbonyl or carbinol groups, the amine groups may be in the 2-, 3-, and/or 4-position, and isomerism is present when X and/or Y is a carbinol group. The polyimides may be end-capped by reaction, during or after their formation, with polymerizable groups such as 3-aminophenyl acetylene or 3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride. The diamines are novel classes of amines when Z is sulfur and X and/or Y are carbonyl or carbinol groups and when Z is oxygen and X, Y, or X and Y are carbinol groups.
    Type: Grant
    Filed: August 4, 1982
    Date of Patent: March 19, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Jules E. Schoenberg, Stephen P. Anderson
  • Imitation cheese products containing modified starch as partial caseinate replacement and method of preparation
    Patent number: 4499116
    Abstract: An imitation cheese product, which is functionally equivalent to a caseinate-based imitation cheese product, contains selected edible modified starches as replacements for up to 80% by weight of the caseinate present in the cheese product. Suitable starches include pregelatinized converted starches having a water fluidity (WF) of about 5-90 and an amylose content of at least about 15% to below 40% and selected derivatives and/or crosslinked products thereof. Suitable converted starches include fluidity starches prepared by acid- or enzyme-conversion or oxidized starches prepared by treatment with up to about 2% active chlorine. The starches may be pregelatinized by drum-drying and jet-cooking, or jet-cooking and spray drying.
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: February 12, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Gary A. Zwiercan, Norman L. Lacourse, Julianne M. Lenchin
  • Cationic vinyl ester based polymer latices, their preparation and use as formaldehyde-free binders
    Patent number: 4489192
    Abstract: High solids, low viscosity, alkaline-curable, thermosetting cationic vinyl ester based polymer latices, characterized by the high molecular weight of the polymer therein, are prepared by polymerizing at least 5% of selected vinyl esters (up to C.sub.6), 0.5-10% of a self-crosslinking cationic quaternary ammonium monomer, and optionally a vinyl polymerizable monomer such as butyl acrylate, ethylene, acrylamide, diallyl maleate, and/or 2-hydroxyethyl acrylate. The polymerization is carried out in the presence of water, a watersoluble cationic azo initiator, a water-soluble amino thiol salt chain transfer agent, and a cationic and/or nonionic surfactant. The latices are useful as formaldehyde-free binders for polyester nonwovens.
    Type: Grant
    Filed: October 5, 1983
    Date of Patent: December 18, 1984
    Assignee: National Starch and Chemical Corporation
    Inventors: Yen-Jer Shih, Carmine P. Iovine
  • Neoprene latex contact adhesives
    Patent number: 4485200
    Abstract: Conventional carboxylated neoprene latex adhesives are improved with respect to their metal adhesion, heat and water resistance and bonding range by the addition thereto of an epoxy resin, preferably an epoxy resin prepared by the reaction of para-aminophenol with epichlorohydrin.
    Type: Grant
    Filed: February 3, 1982
    Date of Patent: November 27, 1984
    Assignee: National Starch and Chemical Corporation
    Inventors: Witold Perlinski, Irwin J. Davis, John F. Romanick
  • Nonpigmented wood stains
    Patent number: 4477282
    Abstract: Nonpigmented wood stains suitable for use on unprimed hardwood surfaces are prepared from aniline dyestuffs and a solvent by the addition of cellulose ethers thereto. In a preferred embodiment the stains additionally contain dibenzylidene sorbitol as a gellant.
    Type: Grant
    Filed: May 13, 1983
    Date of Patent: October 16, 1984
    Assignee: National Starch and Chemical Corporation
    Inventor: Julio A. Fernandez
  • Modified vinyl acetate adhesive compositions containing low temperature fusion aids
    Patent number: 4474915
    Abstract: Modified vinyl acetate aqueous adhesive compositions containing acidic metal salt curing agents, which are suitable for exterior applications where water resistance is required, contain selected solvents as low temperature fusion aids. The adhesives are characterized by their film forming properties at temperatures as low as -1.degree. C., increased closed assembly times of at least up to 40 minutes, improved storage stability, and their satisfactory cold and hot water resistance. They consist essentially of a mixture of (a) an aqueous emulsion of a stabilized vinyl acetate/N-methylol acrylamide polymer; (b) a metal salt curing agent; (c) optionally a cross-linking inhibitor; and (d) 1-7%, based on the polymer solids, of ethylene glycol monomethyl ether acetate, ethylene glycol diacetate, or tetrahydrofurfuryl alcohol as the fusion aid.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: October 2, 1984
    Assignee: National Starch and Chemical Corporation
    Inventor: Ernest J. Grinacoff