Abstract: A dramatic reduction in the time required to fine-grind high borate solder glasses is achieved. In the prior art method, the glass is ball-milled in the presence of an amine for about seven days or more. It has now been discovered that by first rod-milling such glasses for a period of from about 1/2 to about 24 hours, the time required for the "amine grind" can be shortened to a period of from about 1 to 3 days. A further improvement is that rod milling eliminates the laborious sieving procedure previously employed to ensure the absence of undesirably large particles in the feed to the amine grinding operation.

Abstract: The invention comprises polyglycidyl ethers of tris(hydroxyphenyl)alkanes, their blends with other epoxy compounds and their cured products. The invention also comprises a process wherein the coupling reaction is carried out in the absence of coupling catalysts and solvents and the subsequent dehydrohalogenation is done in the presence of a methylethylketone/toluene mixture or an equivalent solvent. The epoxides of the invention have superior and unexpected high-temperature properties, without sacrificing other properties such as flex strength, flex modulus and the like.

Abstract: Solutions of amine-salified phosphoresins and the free amine in organic solvents are converted to stable dispersions of the salified resins in water by steam stripping under conditions such that at least part of the water is provided as condensed steam.

Abstract: An improved combination of an open-ended casing section and a removable closure inset therein is disclosed. The casing section is of composite structure and comprises an annular bulge of bowed fiber sections which, together with underlying annular resin bodies, defines a groove in the inner surface of the casing section. The latter section is improved by incorporation of circumferentially wound fibers in the latter resin bodies and by a hoop of resin-coated fibers wound around the casing section between the apex of the bulge and the casing end. The closure assembly is improved by use of a head having an annular concavity in which is seated a retaining ring adapted to fit into the groove in the inner surface of the casing section when the head is urged toward the casing end.

Abstract: 3,6-Dichloropicolinic acid, a highly active plant growth regulator, is recovered from basic, aqueous solutions thereof by acidification with HCl in the presence of a flocculant, separating the precipitated 3,6-dichloroacid, extracting the unprecipitated acid from the mother liquor with a solvent and stripping the extracted acid from the solvent with another portion of the basic, aqueous feed solution.

Abstract: Thermal stressing of hollow fibers constituting the electrolyte-separator in a high temperature battery cell, and of certain other elements thereof, is avoided by suspending the assembly comprising the anolyte tank, the tubesheet, the hollow fibers and a cathodic current collector-distributing means, within the casing and employing a limp connection between the latter means and the cathode terminal of the cell.

Abstract: Triethylamine and water are simultaneously removed from solutions in organic solvents, by liquid/liquid extraction with concentrated aqueous solutions of (C.sub.2 H.sub.5).sub.3 N.H.sub.3 PO.sub.4 which preferably contain free phosphoric acid as well. Upon heating of the resulting extract, the water and amine taken up are boiled off and the extractant regenerated. The method is of particular value in the preparation of aqueous coating compositions comprising reaction products of polyether epoxides and H.sub.3 PO.sub.4 in organic media. The reaction product is salified with triethylamine in excess, in the presence of added water. The organic solvent is boiled off, together with the excess amine and some of the water, to form an aqueous dispersion of the salified product and a distillate which can be processed by the method of the invention. The recovered solvent, water and amine may be recycled.

Abstract: The combination of n-butanol, n-hexanol and butoxyethanol, is a superior formulation solvent for aqueous dispersions of amine-neutralized, phosphorylated DGEBA-type epoxy resins which are to be applied to container interiors by spraying. Good film rheology and control of viscosity--by adjusting the solvent to organic solids ratio--is attained at total solids content as low as 20 wt. % and at VOC's as low as 3.5 lbs. per gallon.

Abstract: A ceramic tubesheet pierced by a plurality of hollow, glass fibers and consisting of sintered particles is rendered essentially impermeable by selectively fusing the portion of the tubesheet subjacent to and defining one of its surfaces. The fiber lengths extending from the opposite surface of the tubesheet are freer to flex and less likely to be broken than if the entire tubesheet were fused.

Abstract: Hydrophobic, thermoset resins having highly desirable properties in coatings applications can be prepared from novel, water-thinnable, base-neutralized, acidic reaction products of orthophosphoric acid with hydrophobic, nominally-difunctional polyether epoxide resins having average epoxide equivalent weights (EEW) of from about 172 to about 5500. The phosphate groups in these products, when formed with fugitive bases, are thermally decomposable to yield resins which are not rapidly self-converting as such but are rapidly heat convertible in admixture with any of several types of curing agents. The functional groups responsible for water solubilization are utilized (and reacted out) in curing of the resins. The invention provides a method of utilizing hydrophobic, high performance polyether epoxide type polymers in aqueous coating systems having the ability to wet metal surfaces.

Abstract: Multiterminal, high voltage D.C. power networks in which the sub-terminals are electrically isolated from each other comprise D.C. transformers, as the terminals. Each transformer comprises a large number of efficient, high energy batteries, connected as two separate groups: one group made up of paralleled long strings of series connected batteries and the other group made up of paralleled short strings of one or more batteries each. Each transformer also comprises automatic monitoring, control and switching means for periodically exchanging charged and discharged strings between the two groups, one of which--the "primary"--is connected across the supply lines from the power source(s) for the network and the other of which--the "secondary"--is connected across the service lines providing power to users thereof.

Abstract: Phosphoric acid is reacted with mono- or polyfunctional epoxides containing methyol or alkoxymethyl groups, to provide resins which are curable simply by heating and contain as much as about 30 weight percent of phosphoric acid. Improved flame retardancy and water resistance are imparted to structural foams by impregnating them with these resins and curing in-situ.

Abstract: There is disclosed a method of selectively plugging broken fibers included in a bundle of hollow fibers having open ends terminating in or protruding from one face of a tubesheet and closed ends or loops depending from the other face of the tubesheet. The open ends are covered with a curable and flowable sealant and a pressure differential is utilized to draw the sealant into the broken fibers. The resistance to compression of the gases in the unbroken fibers is such that the sealant does not move into them a substantial distance. The sealant is diluted and another pressure differential employed to expel the sealant from the good fibers. The diluted sealant is removed and the plugs in the broken fibers are cured.

Abstract: Alkali metal oxides dissolved in alkali metal melts are reduced with soluble metals which are converted to insoluble oxides. The end points of the reduction is detected as an increase in electrical resistance across an alkali metal ion-conductive membrane interposed between the oxide-containing melt and a material capable of accepting the alkali metal ions from the membrane when a difference in electrical potential, of the appropriate polarity, is established across it. The resistance increase results from blocking of the membrane face by ions of the excess reductant metal, to which the membrane is essentially non-conductive.

Abstract: A small amount of SiO.sub.2 is added to the sodium borate solder glasses of the type previously used to make tubesheets in hollow fiber, high temperature battery cells. The modified glass is more easily ground and has a lower softening temperature. When the powdered glass is fused, to form the tubesheet and sealingly engage the fibers, the fiber-weakening fluxing action of the glass is considerably reduced.

Abstract: A ceramic tubesheet pierced by a plurality of hollow, glass fibers and consisting of sintered particles is rendered essentially impermeable by selectively fusing the portion of the tubesheet subjacent to and defining one of its surfaces. The fiber lengths extending from the opposite surface of the tubesheet are freer to flex and less likely to be broken than if the entire tubesheet were fused.

Abstract: Electrolytic reduction of tetrachloro-2-picolinic acid in basic aqueous solution, at an activated silver cathode, yields the 3,4,6- and 3,5,6-trichloro-2-picolinic acids, which in turn may be further reduced to 3,6-dichloropicolinic acid, a highly active herbicide.

Abstract: Paperstock pieces coated with a thermoplastic resin are introduced into and agitated together in a pool of hot, saturated vapors of a liquid, halogenated hydrocarbon capable of wetting the resin. The vapors condense on the resin surface and the resin is loosened and removed by the combined actions of the agitation and of the vapors and condensate.

Abstract: The utility, as coatings, of water-thinnable, base-neutralized H.sub.3 PO.sub.4 /polyether epoxide reaction products, is improved by admixture therewith of the base-neutralized reaction products of phosphoric acid with various other kinds of epoxides. Of particular value are such mixtures in which the latter products are derived from methylol- or lower alkoxymethyl-substituted epoxides.

Abstract: The combination of a copper halide catalyst certain peroxidic compounds has been found advantageous for the oxidation of Schiff bases of the formula ##STR1## to the corresponding benzoxazoles ##STR2## wherein one of R.sup.3 and R.sup.4 is --NO.sub.2 and the other is --H, alkyl of 1 to 20 carbons, or --NO.sub.2 ; and R.sup.1 and R.sup.2 are independently --H or alkyl of 1 to 20 carbons, with the proviso that R.sup.1, R.sup.2, R.sup.3 and R.sup.4 contain a total of 6 carbons. Benzoxazoles of the latter type have utility as organo-soluble, metallurgical extractants.