Abstract: Propenimidates are provided having the formula: ##STR1## wherein X and Y are independently O or S; andR.sup.1 and R.sup.2 are independently C.sub.1 -C.sub.4 alkyl, (CH.sub.2).sub.n OR.sup.3 where R.sup.3 is C.sub.1 -C.sub.4 alkyl and n is 1 or 2, CH.sub.2 CH.sub.2 Cl, or CH.sub.2 CF.sub.3, provided that when R.sup.1 or R.sup.2 is CH.sub.2 CH.sub.2 Cl or CH.sub.2 CF.sub.3, then the respective X or Y is 0.Preferred propenimidates have X and Y as O and R' and R.sup.2 as methyl or ethyl.The propenimidates are made by preparing a monohydrohalide salt from a dihydrohalide salt of the formula: ##STR2## and then contacting the monohydrohalide salt with cyanamide. The propenimidates upon heating ring close to pyrimidines which are useful in preparing herbicidal compounds.

Abstract: Fluorinated allylisocyanurates are extremely efficient gelling agents for fluoroelastomers. Blends of fluorinated allylisocyanurate gelled fluoroelastomers with non-gelled fluoroelastomers have improved processability as compared with non-gelled fluoroelastomers and blends of other gelled fluoroelastomers with non-gelled fluoroelastomers.

Abstract: A portable instrument quantitatively determining the distinctness of image of a sample paint film by providing comparison of the film with several standard films of known distinctness of image is provided. The instrument displays the sample and one of the standards within an enclosed casing while an image forming pattern is projected simultaneously on both by a light source within the instrument. By changing the standard which is displayed, an observer compares the distinctness of image of the sample with the known values of several standards until a match is found.

Abstract: A surface delay device which exhibits good precision in delay timing when it is ignited from the side output of a low-energy detonating cord (LEDC) trunkline and end-initiates an LEDC trunkline or downline has a percussion-sensitive ignition charge wedged between the integrally closed end of a metal shell and the end of a delay capsule, which houses the delay and priming charges. An orifice in the end of the delay capsule between the ignition and delay charges is kept free of the ignition charge, e.g., by providing an axial recess in the end of the shell extending at least as far as the orifice. In the field the end of a cord is fitted into a well which is seated in the main detonating charge, adapted to be initiated by the priming charge; and another cord is positioned transversely against the ignition end of the shell.

Abstract: Compounds having the formula: ##STR1## where X is F or Cl, a process for the preparation of such compounds, addition copolymers of such compounds with other ethylenically unsaturated monomers, the process of preparation of such copolymers, and derivatives of such copolymers obtained by reaction of the acid halide groups and other compounds.

Abstract: A flashing reactor wherein the initial single pipe carrying the ingredients within the flasher shell is connected within the shell to a flow splitter which in turn is connected to at least two other pipes arranged for parallel flow. In order to avoid an abrupt change in pressure and flow rate downstream from the splitter, the cross-sectional area of the branch pipes immediately adjacent the splitter is approximately equal to the cross-sectional area of the single pipe feeding of the splitter. The branch pipes are then increased in diameter until the combined cross-sectional area of the branch pipes is increased to up to twice the area of the single pipe feeding the splitter.

Abstract: A liquid metallic pigmented coating composition, which produces excellent metallic glamor when it is applied to a substrate and subsequently dried, is provided. The liquid coating composition of this invention is a polymeric dispersion wherein the dispersed phase comprises polymer formed from ethylenically unsaturated monomers and metallic pigmentation and wherein the continuous phase comprises (1) an organic liquid which is a non-solvent for the dispersed phase, and (2) a coalescing solvent for the dispersed polymer.

Abstract: Oxidation of stranded copper wire during high temperature coating with non-melt-fabricable tetrafluoroethylene polymer is substantially prevented by subjecting the wire to a nonoxidizing atmosphere during heating immediately prior to and during coating.

Abstract: Process for preparing furan from 1,3-butadiene, the process comprising contacting the butadiene, at about 65.degree. C. to about 120.degree. C., with a solution having a pH of 0-2.5 and containing palladium ions and a heteropolyacid having a redox potential greater than 0.5 volt, to produce furan.

Abstract: Process for converting premilled quinacridone to pigmentary form by contacting the premilled quinacridone with aqueous alkaline medium in the presence of a quaternary ammonium compound.

Abstract: A two-piece yarn bulking jet is automatically opened and closed for yarn stringup by means of a pneumatically operated piston connected to a rod which in turn passes through the jet body and is attached to the jet cover. The piston is powered by the same pressurized fluid supply used to supply the bulking fluid to the jet apparatus.

Abstract: Mandrel for sizing thermoplastic netting having a cylindrical forming element divided into at least two radial sections retained by circumferential bands and an internal adjusting mechanism including a slidable conical element positioned to outwardly expand the radial sections of the forming element.

Abstract: The invention comprises an improved cathode for a chloralkali cell having grains of alpha-iron adherent to the surface of the cathode, and a process for making the cathode which comprises depositing grains of alpha-iron onto the surface of an electrically conductive cathode substrate in an electrical cell. The invention also provides a method for lowering the operating voltage of a chloralkali electrolysis cell which comprises adding iron particles to the cathode compartment of the cell.

Abstract: A firearm having interchangeable barrels and ammunition cylinders for changing the caliber of ammunition used therewith includes a plurality of ammunition cylinders and a plurality of barrels, each barrel being threadedly mountable on the firearm frame with each barrel including a longitudinal barrel extension for interfering with the mounting and revolution of the ammunition cylinders for ammunition having a larger caliber than that of the respective barrel, and the improvement therein includes alignment marks on the barrels and frame for alignment under the full threaded engagement of each barrel in the frame, a plurality of sight ribs with each sight rib corresponding to a different barrel, means for attaching each sight rib to its corresponding barrel at a predetermined location to enable each sight rib to its corresponding barrel at a predetermined location to enable each sight rib to be operatively oriented with the rear sight for aiming the firearm when each barrel is fully threadedly engaged in the fr

Abstract: A process for preparing high strength, high modulus aromatic polyamide filaments by extruding an acid solution containing at least 30 g. per 100 acid of an aromatic polyamide having an inherent viscosity of at least 4 and chain extending bonds which are either coaxial or parallel and oppositely directed through a layer of inert noncoagulating fluid into a coagulating bath and then through a spin tube along with overflowing coagulating liquid is improved by jetting additional coagulating liquid symmetrically about the filaments in a downward direction forming an angle .theta. or 0.degree. to 85.degree. with respect to the filaments within 2.0 milliseconds from the time the filaments enter the spin tube, the flow rates of both the jetted and overflowing coagulating liquid being maintained at a constant rate such that their momentum ratio .phi. is from 0.5 to 6.0 and the mass flow rate of total coagulating liquid is from 70 to 200 times the mass flow rate of the filaments.

Abstract: A photosensitive composition comprising a photooxidant, leuco dye and a substituted hydroxylamine compound of the formula R.sub.1 R.sub.2 NOH wherein R.sub.1 and R.sub.2, e.g., are alkyl, cyclic alkyl, aryl, aralkyl, alkaryl and R.sub.1 and R.sub.2 taken together form a heterocyclic ring of 5 to 7 carbon atoms. Optionally monomers and polymeric binders can be present. The compositions are useful for photoimaging and in solvent and aqueous developable resist-forming films.

Abstract: A fractionable, elastomeric polymer of 1-butene consisting essentially of 30% to 80%, by weight, of an ether-soluble fraction having an intrinsic viscosity exceeding 1.5 and an infrared crystallinity value of about 1% to 15%; and 20% to 70%, by weight, of an ether-insoluble fraction having an infrared crystallinity value of about 20% to 55%; said polymer having an nmr isotacticity of about 20% to 50% and an intrinsic viscosity exceeding 1.5; elastomeric copolymers of 1-butene; polymer blends containing said elastomeric polymers; and a catalytic process for making said elastomeric polymers.

Abstract: Tin alloy solder powder compositions comprising finely divided particles of the alloy coated with a thin continuous layer of organic flux sufficient to lower the electrical conductivity and to obscure the eutectic domains on the surface of the alloy particles.

Abstract: An improved process for coating sheet substrates with thermoplastic polymer is disclosed. In the process the sheet substrate forms one die lip of the extrusion coating die. The sheet substrate is passed from face-to-face contact with the metal block of the extrusion coating die into a spaced apart relationship with one die lip of the extrusion coating die, the sheet substrate forming the second die lip. Molten thermoplastic polymer is extruded into the space between the one die lip and the sheet substrate, thereby coating the sheet substrate with polymer. The preferred polymer is a poly-.alpha.-olefin, especially polyethylene or a copolymer of ethylene and butene-1. The preferred sheet substrate has orifices in the surfaces thereof. The process may be used to coat sheet substrates with a thermoplastic polymer, e.g. in the manufacture of form boards for the construction industry.

Abstract: A package comprising a light-proof envelope or bag containing a plurality of X-ray film sheets stacked for co-operation with a dispensing machine and useful in a daylight handling system for daylight loading and unloading of cassettes. The film sheets are identical and may have a photographic emulsion layer on one or both surfaces. The adjacent films in the stack have their surfaces in contact. Each sheet has a cut-away portion along one edge thereof for coacting with a film selector cam. In the stack, the sheets are alternated so that the cut-away portions lie along a common stack edge and are arranged in two parallel rows. The cut-away portions in adjacent sheets are in different rows and in superposition. After the package is in a dispenser, the envelope or bag is stripped from the stack so that the sheets can be removed one at a time from the stack and passed into film holders or cassettes engaged with the dispensing machine.