Abstract: A computer implemented knowledge-based system for the selection of materials and/or fabrication processes for a durable goods application. The system consists of a graphical user interface, an expert system shell and a models and data base program. The system provides rapid, consistent and accurate techno-economic comparisons of processes and materials to select the best materials and fabrication processes for the durable goods application.

Abstract: A preform suitable for use in a resin transfer molding process comprising (1) one or more layers of a non-woven random mat and (2) one or more layers of a series of tows of unidirectional fibers held together by a polymeric curable resin film grid. The polymeric resin film is in the form of a grid, such that only a fraction of the surface area of the fibers contacts the resin film.

Abstract: The oligomers of the present invention are polythioureas having 3 to 50 recurring units derived from aromatic diamines substituted with anionic groups, and having a number average molecular weight of less than 10,000. These oligomers are water-soluble, preferably have a rigid backbone, and are pharmaceutically-acceptable. The oligomers are useful for the treatment and/or diagnosis of AIDS.

Abstract: The narrow poly- or mono-dispersed oligomers of the present invention are polyureas, polycarbonates, polyesters or polyamides having a recurring unit of from 3 to 50. These oligomers are water-soluble, preferably have a rigid backbone, have recurring units coupled by carbonyl linking moieties which have anionic groups, display predominantly linear geometry such that regular spacing between anionic groups exists in an aqueous medium, and are pharmaceutically-acceptable. The narrow poly- or mono-dispersed oligomers are useful for the treatment and/or diagnosis of AIDS and/or ARC or HSV.

Abstract: The narrow poly- or mono-dispersed oligomers of the present invention are polyureas, polycarbonates, polyesters or polyamides having a recurring unit of from 3 to 50. These oligomers are water-soluble, preferably have a rigid backbone, have recurring units coupled by carbonyl linking moieties which have anionic groups, display predominantly linear geometry such that regular spacing between anionic groups exists in an aqueous medium, and are pharmaceutically-acceptable. The narrow poly- or mono-dispersed oligomers are useful for the treatment and/or diagnosis of AIDS and/or ARC or HSV.

Abstract: Hot-melt adhesive compositions containing high molecular weight linear styrene-isoprene-styrene block copolymers or high molecular weight linear styrene-butadiene-styrene copolymers, having little or no residual diblock, and articles made therefrom. The resulting adhesive composition may include solid tackifying and liquid tackifying resins.

Abstract: The oligomers of the present invention are polyamides having a number average molecular weight of <10,000. These oligomers are water-soluble, have a rigid backbone with a predictable anion spacing, and are pharmaceutically-acceptable. The oligomers are useful for the treatment and/or diagnosis of HSV and HCMV.

Abstract: The present invention relates to achiral polyurea oligomers, their uses and formulations as anti-HIV pharmaceuticals and to a process for the preparation of narrow mono- and polydispersed oligomers as an emodiment of the invention. The achiral oligomers are derived from repeating units of the monomer 4,4'-diamino-biphenyl-3,3'-disulfonic acid and are water soluble, have a rigid backbone, possess ordered anionic spacing and have a number average molecular weight of <20,000. The process relates to the synthesis of narrow poly- and mono-dipersed oligomers comprising the steps of: 1) restricting the crude olydispersed anionic oligomer mixture to a narrow polydispersed anionic oligomer mixture to a narrow polydispersed anionic oligomer mixture; and/or 2) isolating the monodispersed anionic oligomer; and 3) optionally converting the narrow poly- or mono-dispersed anionic oligomer salt from Step 1 or 2 to a desired pharmaceutically-acceptable salt, especially a solim or potassium salt.

Abstract: This invention relates to a method of and apparatus for separating component gases in a gas mixture employing a glassy polymer membrane at temperatures of 5.degree. C. or less so as to achieve superior separation of gas components.

Abstract: The preferred oligomers of the present invention are polyureas having a number average molecular weight of <10,000. These oligomers are water-soluble, have a rigid backbone, have recurring units coupled by carbonyl linking moieties which have anionic groups, display predominantly linear geometry such that regular spacing between anionic groups exists in an aqueous medium, and are pharmaceutically-acceptable. These oligomers are prepared by reacting an aromatic diamine with a difunctional electrophile, in the presence of an acid acceptor, in water as the solvent or water with up to about 1 mole of water immiscible cosolvent, at a temperature of from 0.degree. to 100.degree. C. and at a pH between about 7 to about 9. The oligomers are useful for the treatment and/or diagnosis of AIDS and ARC.

Abstract: A system and method for simulating LCM mold filling utilizes at least one processor, suitable RAM and storage memory, input means, display means, and logic for simulating the injection of resin into a mold cavity containing a preform based upon mold cavity design parameters, mold filling processing parameters, physical property parameters, and system processing parameters, and identifying the current state of selected mold filling conditions at selected points in time during the simulated mold filling process. The system includes logic for identifying incipient dry spots, and also preferably includes means for interrupting the operation of the program at selected points to vary selected parameters to eliminate incipient dry spots and otherwise maximize the mold filling process.

Abstract: The oligomers of the present invention are polyureas, polycarbonates, polyesters or polyamides having a number average molecular weight of <10,000. These oligomers are water-soluble, have a rigid backbone with a predictable anion spacing, and are pharmaceutically-acceptable. The oligomers are useful for the treatment and/or diagnosis of HSV and HCMV.

Abstract: The narrow poly- or mono-dispersed oligomers of the present invention are polyureas, polycarbonates, polyesters or polyamides having a recurring unit of from 3 to 50. These oligomers are water-soluble, preferably have a rigid backbone, have recurring units coupled by carbonyl linking moities which have anionic groups, display predominantly linear geometry such that regular spacing between anionic groups exists in an aqueous medium, and are pharmaceutically-acceptable. The narrow poly- or mono-dispersed oligomers are useful for the treatment and/or diagnosis of AIDS and/or ARC or HSV.

Abstract: Compositions comprising epoxy resins containing one or more rodlike mesogenic moieties per molecule are cured with curing agents which will normally cure epoxy resins. These curable compositions can be oriented by the application of an electric field, magnetic field drawing and/or shear flow prior to and/or during curing. The resultant cured products exhibit an improvement in one or more physical or mechanical properties as compared to a like epoxy resin system which does not contain any rodlike mesogenic moieties.

Abstract: A mixing valve nozzle for homogeneously mixing two fluid streams and dispensing a predetermined quantity of fluid into a container, the mixing valve having a housing with a centrally disposed valve stem, an inlet port, an outlet port and a second inlet port disposed therebetween, the valve stem having mixing means rotatably secured thereto comprising a plurality of mixing plugs axially mounted on the valve stem, each mixing plug containing a plurality of nonaligned conduit passageways to homogeneously mix the fluid entering the mixing valve nozzle from the first inlet and the fluid entering the mixing valve from the second inlet, during the dispensing phase.

Abstract: A mixing valve nozzle for homogeneously mixing two fluid streams and dispensing a predetermined quantity of fluid into a container, the mixing valve having a housing with a centrally disposed valve stem, an inlet port, an outlet port and a second inlet port disposed therebetween, the valve stem having a mixing means rotatably secured thereto comprising a plurality of mixing plugs axially mounted on the valve stem, each mixing plug containing a plurality of nonaligned conduit passageways to homogeneously mix the fluid entering the mixing valve nozzle from the first inlet and the fluid entering the mixing valve from the second inlet, during the dispensing phase.

Abstract: Ceramic bodies having a balanced overall stress pattern in which are present individual stress zones of compressive and tensile stresses and the techniques for forming said bodies are disclosed. The bodies are formed by having slightly different compositional patterns from one zone to another whereby during cooling there is a differential volumetric expansion or contraction in one zone as compared to an adjacent zone. The volumetric expansion or contraction is caused by a material which undergoes a phase transformation during the cooling from the sintering temperatures utilized to sinter the ceramic body, whereby such phase transformation is accompanied by a volumetric change.

Abstract: A process for recovering hydrogen fluoride from waste stream gases containing hydrogen fluoride by contacting the waste stream with a scrubbing agent comprising a chlorinated pyridine.

Abstract: An antistatic additive for polymers, particularly polyurethanes is disclosed comprising an ionizable metal salt and an enhancer comprising a non-ionizable salt or ester of an organic acid.

Abstract: The present invention relates to crop culture and is particularly concerned with practices for conserving soil nitrogen and for supplying the soil nitrogen requirements for plant nutrition. These practices involve the employment, as active agent, of a novel butane compound having the formula ##STR1## wherein X is H or ##STR2## R is H or C.sub.1 -C.sub.8 alkyl; R' is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halo and n is an integer from 0 to 2.