Patents by Inventor James W. Lalk

James W. Lalk 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: 4376861
    Abstract: The process comprises the steps of:(A) reacting by contacting an anhydrous or substantially anhydrous 2-alkyl-2-oxazoline with formaldehyde in a molar ratio of at least about 1.5 moles of 2-alkyl-2-oxazoline per mole of formaldehyde, thereby forming 2-(.alpha.-hydroxymethylalkyl)-2-oxazoline,(B) recovering the 2-(.alpha.-hydroxymethylalkyl)-2-oxazoline from the reaction product of step (A), and(C) reacting by contacting the 2-(.alpha.-hydroxymethylalkyl)-2-oxazoline and step B with an alkali or alkaline earth metal hydroxide, thereby forming 2-alkenyl-2-oxazoline.As an example, step A was conducted by reacting 2-ethyl-2-oxazoline (4 moles) having less than 1,000 ppm of water with paraformaldehyde (1 mole) at a reaction temperature of C. for approximately 5.5 hours. The excess oxazoline reactant was removed along with water as "overheads" by fractional distillation of the reaction product, leaving the 2-(.alpha.-hydroxymethylethyl)-2-oxazoline in approximately 96 percent yield.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: March 15, 1983
    Assignee: The Dow Chemical Company
    Inventors: James W. Lalk, Gerald C. Kolb, Donald A. Tomalia, Peter W. Owen
  • Patent number: 4356309
    Abstract: Compounds of the formula ##STR1## wherein R.sub.1 represents C.sub.1 to C.sub.20 alkyl-substituted benzyl, orC.sub.2 to C.sub.20 alkyl which can optionally bear one or two --OR.sub.2 radicals, wherein each R.sub.2 independently represents hydrogen or the radical ##STR2## wherein R.sub.3 represents C.sub.1 to C.sub.20 alkyl are disclosed. These compounds are useful for the selective extraction of cobalt, nickel or copper ions from aqueous acidic ore leach liquors.
    Type: Grant
    Filed: July 13, 1981
    Date of Patent: October 26, 1982
    Assignee: The Dow Chemical Company
    Inventors: James W. Lalk, Frances P. Hamburg
  • Patent number: 4297452
    Abstract: A novel process is disclosed for increasing the amount of grafted polymer formed during the production of polyamide-modified macroporous polystyrene/divinylbenzene cross-linked beads. Greater selectivity for oxazolination and/or oxazination (grafting) of the chloromethylated polystyrene (CMPS) beads over homopolymer formation is achieved by forming an iodized cross-linked vinyl-addition polymer which is then contacted with an excess of oxazoline or oxazine until up to about 50 percent of said oxazoline or oxazine monomer is reacted. Subsequent hydrolysis of these polyamide-modified resins produces polyamine anion-exchange resins which exhibit greater than 2 times the weak base capacities of conventional anion-exchange resins.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: October 27, 1981
    Assignee: The Dow Chemical Company
    Inventors: Robert J. De Koch, Gerald C. Kolb, James W. Lalk
  • Patent number: 4185128
    Abstract: A method for reducing the snagging of fabrics involves the application to the fabric of an emulsion of a chlorinated solvent as the continuous phase and as the dispersed phase, an aqueous latex of a polymer of from about 25 to 50 weight percent of a hydroxy lower alkyl acrylate, from about 6 to 12 weight percent acrylonitrile, from about 40 to 60 weight percent of a lower alkyl acrylate having from two to eight carbon atoms in the alkyl group and from about 1 to 5 weight percent acrylic acid wherein said polymer is of a high enough molecular weight to be insensitive to chlorinated solvents and water and after application and thereafter desolvating, dewatering and curing the polymer on the fabric.
    Type: Grant
    Filed: May 1, 1975
    Date of Patent: January 22, 1980
    Assignee: The Dow Chemical Company
    Inventors: Thomas O. Ginter, James W. Lalk
  • Patent number: 4080161
    Abstract: Antistatic compositions for topical application to substrates, which comprise(a) a polymer of less than about 20,000 molecular weight consisting essentially of, in polymerized form, about 10 to 99 mole % alkylene oxide, of 2 to 4 carbon atoms, about 1 to 90 mole % glycidol and about 0 to 15 mole % of the glycidyl ester of a fatty acid of about 2 to 20 carbon atoms and about 0 to 15 mole % of the glycidyl monoester of a polycarboxylic acid,(b) a curing agent capable of cross-linking the polymer by reaction with the primary hydroxyl groups of the glycidol units, such as melamine-formaldehyde condensates, dialdehydes, polycarboxylic acids and their anhydrides, epoxy resins (polyepoxides), polyisocyanates, and the like and(c) a catalyst for the curing reaction, such as zinc fluoroborate, a sulfonic acid, phosphoric acid, ammonium sulfate or the like.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: March 21, 1978
    Assignee: The Dow Chemical Company
    Inventors: Violete L. Stevens, Arthur R. Sexton, James W. Lalk, Ronald D. Deibel, Fred P. Corson
  • Patent number: 4013480
    Abstract: Novel cellulosic sizing agents are described. They are ring-opened aziridinyl homopolymers of ##EQU1## wherein R.sub.1 and R.sub.2 are hydrogen or lower alkyl; R.sub.3 is hydrogen or methyl; R.sub.4 is an organic hydrophobic group (e.g., C.sub.8 -C.sub.24 alkyl radical); and X is oxygen or amido nitrogen. The above homopolymers can also be blended with cationic starch to form useful sizing compositions. These sizing agents are normally employed as aqueous emulsions. E.g., paper having excellent sizing properties was prepared from a paper pulp containing a mixture of cationic starch and poly[stearyl 3-(1-aziridinyl)propionate].
    Type: Grant
    Filed: January 10, 1974
    Date of Patent: March 22, 1977
    Assignee: The Dow Chemical Company
    Inventors: Lewis E. Chumbley, Lawrence L. Sams, II, Russell T. McFadden, Juan Longoria, III, Donald A. Tomalia, Robert J. Thomas, James W. Lalk