Abstract: Compositions comprising certain amino acids such as aspartic acid, when fully ionized at alkaline pH, function effectively as corrosion inhibitors for ferrous metals in the presence of an aqueous medium. This effect is enhanced with increased fluid velocity.

Abstract: The present invention provides polyamide compositions comprising a polyamide, nylon 2,2, and a phosphorous-containing whitening agent having Formula I: Formula I: wherein R is hydrogen, an alkyl group with 1 to 6 carbons, a cycloalkyl group with 5 to 6 carbons, or a phenyl or methylphenyl aromatic group, and M is hydrogen or a metal. In a preferred embodiment, the polyamide is nylon 6,6 (polyhexamethylene adipamide) and the phosphorous-containing whitening agent is a hypophosphorous acid or a metal hypophosphite. Sodium hypophosphite is especially preferred. The polyamide compositions of the present invention have improved molding cycle times, and are tough, white and color-stable.

Abstract: A process for producing a polyamide from dicarboxylic acid monomer and diamine monomer comprises the steps of: (a) mixing molten dicarboxylic acid monomer and molten diamine monomer in equimolar amounts, thereby producing a molten reaction mixture; (b) flowing the reaction mixture through at least one unvented reaction vessel, the residence time of the reaction mixture in the at least one unvented reaction vessel being between about 0.01 minutes and about 30 minutes, thereby forming a first product stream that comprises polyamide and water of polymerization; and (c) flowing the first product stream through at least one vented vessel, whereby water of polymerization is removed, thereby forming a second product stream that comprises polyamide. The process can operate continuously, and there is no need to add water to the dicarboxylic acid, to the diamine, or to the reaction mixture.

Abstract: An implantable medical article as well as an implantable fiber which is particularly useful for medical implants is disclosed. The fiber includes comprises a first component formed from a substantially resorbable material and a second component formed from a fiber-forming polymer.

Abstract: Superabsorbent polymer compositions comprising a fiber-containing composition derived from cellulosic fibers, synthetic fibers or mixtures thereof which is at least partially coated with a partially acidified, hydrolyzed, internally plasticized, crosslinked, superabsorbing polymers derived from polysuccinimide and processes for preparing same.

Abstract: A process for hydroxylating an aromatic compound comprises the steps of: (a) contacting an aromatic compound with a catalyst having an average concentration of .alpha.-sites of at least about 1.multidot.10.sup.16 per gram of catalyst, the catalyst having .alpha.-oxygen loaded thereon, whereby an hydroxylated derivative of the aromatic compound is produced; and (b) regenerating the catalyst when the concentration of .alpha.-sites falls below a predetermined value. The predetermined value will depend on the process design, but can suitably be about 1.multidot.10.sup.16 per gram of catalyst or higher.Another embodiment of the process comprises: (a) contacting an aromatic compound with a catalyst having an average concentration of .alpha.-sites of at least about 1.multidot.10.sup.16 per gram of catalyst, the catalyst having .alpha.-oxygen loaded thereon, whereby an hydroxylated derivative of the aromatic compound is produced; and (b) reloading the catalyst with .alpha.

Abstract: Superabsorbent fiber composition comprising partially hydrolyzed, internally plasticized, crosslinked, superabsorbing fibers derived from polysuccinimide and process for preparing same. Superabsorbent film composition comprising partially hydrolyzed, internally plasticized, crosslinked, superabsorbing film derived from polysuccinimide and process for preparing same.

Abstract: Chemically leavened bakery product(s) are disclosed which have characteristics similar to bakery product(s) that have been yeast leavened. A process is provided to make such a bakery product without utilizing yeast as the source of carbon dioxide for leavening. Chemically leavened dough is disclosed which may be heated as a fresh dough, or refrigerated or frozen and thereafter heated to prepare a bakery product. Multi-part dry mixes or compositions for preparing such chemically leavened bakery products are disclosed.

Abstract: The present invention relates to a method for exchanging derivatizing agents onto ionic functional groups, preferably sulfate, sulfonate, and carboxylate functional groups, in a polymer, and then thereby holding these derivatizing agents in place by strong ionic bonds. The ionic functional groups are those currently used in industry to enhance dyeability, and therefore do not present a problem with textile treatments normally encountered in the industry. Polyacrylonitrile polymer is synthesized with an ionic comonomer to obtain a number of dye sites above that required for dying. The sodium or other cation that is ionically bound to the ionic comonomer, as well as the sulfonate and sulfate end groups, is then exchanged with a derivatizing agent. The preferred derivatizing agents comprise a quaternary ammonium compound.

Abstract: Apparatus for continuously filtering molten polymer comprising: an arbor seated in a fixed support, the arbor having inlet and outlet ports for respectively receiving contaminated and discharging filtered melt, the ports communicating with openings in a pair of housings rotatably mounted on the arbor; a plurality of filter pod assemblies outwardly of and mounted on the rotatable housings, each assembly having a filter for contaminated melt and intake and discharge openings intermittently alignable with the ports on rotation of the housings to position a clean filter in the path of the contaminated melt and to remove the filter from the path when blocked with contaminants; passages associated with the inlet and outlet ports of the arbor and the housings for gradually establishing a flow of melt into a clean filter as it is rotated into filtering position; and thermally dilatable seal between the rotatable housings and the arbor to seal the housings and the arbor during the filtering of contaminated melt by a f

Abstract: An essentially non-aqueous cleaning composition and method for using this composition to remove chemicals from substrates, the composition comprising a dibasic ester and a thickening agent which is soluble, swellable or dispersible in said dibasic ester and wherein said thickening agent is present in an amount such that said composition has a numerical ratio of viscosity unsheared to viscosity under shear of at least about 3:1.

Abstract: A novel method for forming a dispersable, fine titanium pyrophosphate powder by reacting titanium dioxide and a molar excess of phosphoric acid. The excess phosphoric acid, at a phosphorus pentoxide to titanium dioxide mole ratio greater than one, significantly improves the yield of the reaction product as a fine powder. A phosphorus pentoxide to titanium dioxide mole ratio of about 1.20 to about 1.25 results in over a 90% yield of a dispersable, fine titanium pyrophosphate powder having a particle size less than one micron in diameter.

Abstract: New plastic articles are disclosed and claimed having flame retardant properties which contain a core of a plastic polymeric material (thermoplastic, thermoset, rigid foam or semi-flexible foam polymeric material) which is coated with a protective, flame retardant layer comprising a mixture of a thermoplastic polymeric material and a flame retardant, char-forming, intumescent system. The new articles are suitable for the manufacture of e.g. rods, beams, pipes, hoses, non-tubular profiles and panels which are useful in various industries such as the building, automotive and mining industries.

Abstract: Thermoplastic sheet comprising plasticized polyvinyl butyral has a regular pattern of ridges and channels integrally formed and arranged in each face at an angle of intersection with respect to each other of at least 25 degrees, the ridges tapering to flattened V-shaped peaks of tight radius of less than 0.0034 inch, each face of the sheet having a surface permanence of at least 70%.

Abstract: A method for removing color and extracting dyes from ionically dyeable polymeric materials is provided. The method includes contacting the ionically dyeable polymeric material with a swelling agent for the material under conditions sufficient to effect diffusion of the dye from the material. The process is especially useful for removing colors from ionically dyeable polymeric materials as part of a recycling process for such materials. Also, the extracted dye may be recovered for re-use as the swelling agent and contacting composition are substantially non-reactive with the dye.

Abstract: A plasticized polyvinylchloride (PVC) substrate coated with a plasticizer-resistant pressure-sensitive adhesive comprising a plasticized PVC substrate on which is deposited an adhesive acrylic PSA polymerized in the presence of a chain transfer agent, comprising about 50 to about 99.8% C.sub.1 -C.sub.12 alkyl acrylate monomer, 0 to about 40% vinyl unsaturated monomer, 0.1 to about 10% carboxylic acid functionalized monomer, 0 to about 10% hydroxyl functionalized monomer and about 0.1 to about 10% internal crosslinking monomer wherein the PSA has a glass transition temperature, T.sub.g, of less than -10.degree. C. and greater than about -45.degree. C. and wherein said substrate retains at least 40% peel adhesion and 50% shear strength after heat aging.

Abstract: An acrylic fiber exhibiting improved brightness and proccessability is disclosed. The fiber includes a synergistic combination of a delustrant and an optical brightener and is specifically useful in the manufacture of "terry" knitted athletic socks.

Abstract: There is disclosed a novel process for preparing hemipotassium phosphate useful as an acidulant for beverages. An equimolar mixture of monopotassium phosphate and phosphoric acid is heated to a temperature above 100.degree. C. cooled with vigorous agitation whereby the liquid loses its free water and crystallizes to a relatively dry crystalline mass. When prepared by the process of this invention hemipotassium phosphate provides a dry, flowable, crystalline product which can be transported and handled easily.

Abstract: An aqueous, coatable, thermally condensable composition is disclosed. The coating is based on dispersions of vinyl acetate polymers in water. Uniquely, the coating can be advantageously used for both nylon and polyester yarns. The coated yarns exhibit performance equivalent to or better than coated yarns based on traditional compositions.

Abstract: A fluid composition suitable for use as an aircraft hydraulic fluid is disclosed. The fluid composition comprises a fire resistant phosphate ester base stock comprising between about 10% and about 100% by weight of a trialkyl phosphate, between about 0% and about 70% by weight of a dialkyl aryl phosphate, and from about 0% to about 25% by weight of an alkyl diaryl phosphate, with the proviso that the sum of the proportionate amount of each base stock component must equal 100%. The alkyl substituents of the trialkyl phosphate, the dialkyl aryl phosphate, and the alkyl diaryl phosphate contain between 3 and 8 carbon atoms, preferably between 4 and 8 carbon atoms, more preferably between 4 and 5 carbon atoms, and are bonded to the phosphate moiety via a primary carbon. It is still further preferred that the alkyl substituents of the trialkyl phosphate, the dialkyl aryl phosphate, and the alkyl diaryl phosphate are isoalkyl groups.