Abstract: A process for spinning para-aramid fibers of increased tenacity and elongation at break by using an air-gap means with a spinneret capillary of less than 2.5 mils diameter, a coagulation bath temperature of less than 10C, and tension on the fibers during washing and drying of more than 0.05 and less than 0.35 gpd.

Abstract: Aqueous ink jet ink compositions comprising an aqueous carrier medium, a colorant, such as a pigment dispersion or dye, and a nitrogen-containing organic cosolvent having a solubility in water of at least 4.5 % at 25.degree. C., exhibit freedom from plug formation and excellent storage stability.

Abstract: A process for longitudinally stretching a polymeric film having thickened longitudinal edges while the film is constrained in the lateral dimension by a plurality of successive pairs of grippers, the improvement comprising first guiding the film with a first group of gripper pairs having a predetermined clearance therebetween; and then gripping the film with a second group of gripper pairs with a predetermined amount of force. An apparatus for use in the process is also disclosed.

Abstract: The present invention is directed to a method of producing an improved reverse osmosis membrane that shows surprisingly improved solute rejection and permeation properties. The membrane includes a separating layer of a polyamideurea formed in situ by reaction of isocyanate-substituted acyl chloride and a diamine-treated microporous substrate.

Abstract: Amorphous fibers or fibrids of poly [4,4'-(2,2'-dicarboxy) biphenyleneterephthalamide] are strengthened and heat stabilized by a relaxed heat-treatment. The fiber or fibrids are heated at temperatures in the range of 310.degree. C. to 365.degree. C. and preferably at temperatures above 325.degree. C. but below decomposition temperatures. The heating is conducted for at least 2 minutes, preferably from 5 to 15 minutes. Increases in tenacity of at least 25%, preferably at least 50% or more are attained. The fiber or fibrids are treated while free of ternsion as they would be in a loose batt, woven or knitted fibric or paper.

Abstract: A process is disclosed for the preparation of methyl- and ethyl-substituted anilines by contacting anilines of specified formula at about 250.degree.-525.degree. C. and about 10 kPa-10 MPa of pressure in the of presence of a nonbasic metal oxide catalyst which when it is a zeolite has pore dimensions of at least about 0.52 nm and has cages with dimensions greater than about 0.75 nm.

Abstract: An adaptable card mounting system includes a number of card guides having predefined configurations selectively mounted at slot locations within a chassis to enable cards of varying dimensions to be installed. A first type of card guide is mounted to opposed walls of the chassis at each slot location. This first card guide is required for installation of cards of a first length and first depth. A second card guide is mounted to the walls of the chassis in conjunction with the first card guide at slot locations requiring installation of circuit cards having a second depth different than that of the first depth. A third type of card guide is mounted between the opposed first or second card guides at selected slot locations requiring installation of cards of a second length shorter than the first length. Use of the three card guides at selected slot locations permits installation of circuit cards of varying dimensions independent of slot location.

Abstract: Polypeptide fibers, fiber spinnable solutions, and a process for forming polypeptide fibers are disclosed. The invention includes forming polypeptide fibers from spinning solutions containing a polypeptide, and a solvent selected from the group consisting of hexafluoroisopropanol, and a mixture of formic acid and at least one lithium halide.

Abstract: A process is disclosed for making a compacted, redispersible, aramid pulp fiber product wherein aramid pulp is opened using the forces of a turbulent air grinding mill and then the opened pulp is compacted to the extent desired for shipping.

Abstract: As a cloth for filter bags, a laminate comprising thin layer of nonwoven poly(p-phenylene terephthalamide) needled to a felt of poly(m-phenylene isophthalamide), polyester or polyphenylenesulfide fiber felt increases the resistance to burn through by hot sparks.

Abstract: The invention provides novel polyesters, fibers and films, nonwovens from the fibers and disposable products of the polyesters such as diapers. The products are degradable under the conditions typically existing in waste composting processes, have low ingredient costs and yet provide strength and toughness properties adequate for end uses such as in disposable diapers. The polyesters are based upon polyethylene terephthalate copolymerized with a non-aromatic diacid, such as adipic and glutaric acids, and containing alkali metal or alkaline earth metal sulfo groups, such as a metal 5-sulfoisophthalic acid derivative.

Abstract: A catalyst for oxidizing a carbon-containing compound comprising a composite oxide powder composed of 4 to 19% by weight of silica, 3 to 10% by weight of boria, and the balance alumina, and palladium in an amount of 3 to 100 g per 1 liter of the powder carried on the composite powder, and a method for producing such a catalyst are described. The composite oxide is thermally stable and prevents reduction of palladium oxide, and the catalyst can be used for an extended period high temperatures.

Abstract: A one-piece protective garment of the type affording barrier and thermal protection against hot and/or corrosive liquids. The garment includes a generally continuous outer shell of woven aramid fabric covered by a liquid impervious layer and a corresponding inner multilayer thermally insulating liner inside of the outer shell. The inner liner is fabricated from at least one layer of low density nonwoven fabric fastened to a woven fabric. An elongated leg inseam opening is provided on the underside of the torso portion of the liner fabric and which extends from the position of the wearer's crotch downwardly into and along the inside of each leg. The garment also has an underarm inseam opening under and partially around each arm of the liner extending upwardly from the position of the wearer's armpit along the front and back seam between the sleeve and the torso portion of the inner liner.

Abstract: The invention provides novel polyesters, fibers and films, nonwovens from the fibers and disposable products of the polyesters such as diapers. The products are degradable under the conditions typically existing in waste composting processes, have low ingredient costs and yet provide strength and toughness properties adequate for end uses such as in disposable diapers. The polyesters are based upon polyethylene terphthalate copolymerized with a cycloaliphatic diacid, preferably hexahydroterephthalic acid, and containing alkali metal or alkaline earth metal sulfo groups, such as a metal 5-sulfoisophthalic acid derivative.

Abstract: This invention relates to novel chiral 1,4-diol cyclic sulfates and their use as precursors in the preparation of chiral phospholane ligands, and chiral complexes useful as catalysts for carrying out enantioselective reactions.

Abstract: Sprayable aliphatic polyurea-polyurethane coating compositions and methods are disclosed. A quasi-prepolymer composition is prepared by mixing an aliphatic polyisocyanate with a stoichiometrically deficient quantity of polyol such that substantially all of the available hydroxyl groups of the polyol react with the isocyanate groups of the aliphatic polyisocyanate. Suitable catalysts may be used to accelerate the urethane bonding in the quasi-prepolymer compositon. The polymeric coating is preferably formed by reacting the quasi-prepolymer composition with a low molecular weight or a mixture of low and high molecular weight amine terminated polyether compounds. The amine terminated polyether compounds have amine groups capable of reacting with the unreacted isocyanate groups of the quasi-prepolymerMixing of the quasi-prepolymer composition and the amine terminated polyether is preferably done at a sufficiently fast rate of result in a substantially homogeneous product.

Abstract: The tip has intermediate its end at least two axially spaced projections which are formed on the wall of its axial bore to extend radially and part way into the bore to define therebetween a reaction chamber in the bore of the tip. A spherical receptor element is mounted in the reaction chamber for limited pulsating movement therein in response to the movement of a fluid sample into and out of the tip. Additional projections may be formed in the bore to increase the turbulence created by the sample as it moves through the tip. The spherical element is coated with a ligand having a specific affinity for a target molecule in the sample.