Abstract: Aqueous-based mixtures comprising colloidal vanadium oxide and a dispersed sulfonated polymer impart antistatic properties to coatings on a substrate and to self-supporting articles. The preferred colloidal vanadium oxide is alkoxide derived and provides mixed valence vanadium oxide wherein the vanadium ions are typically +4 and +5. Preferred sulfopolymers include sulfopolyesters, sulfopolyurethanes, sulfopolyurethanes/ureas, sulfopolyester polyols, and sulfopolyols. Antistatic composite structures comprising colloidal vanadium oxide and a sulfopolymer are also disclosed.

Abstract: The invention provides a method of separating a biomacromolecule which comprises the steps of providing a separation system including a filter element which comprises a composite filtration medium, the composite filtration medium comprising a filtration layer on the upstream surface of which are located insoluble stationary phase particulates, the particulates being capable of binding to a biomacromolecule or class of biomacromolecules, a reservoir containing a solution mixture comprising at least one biomacromolecule as solute, and a pump and associated tubing to form a closed loop assembly, and recirculation pumping the solution mixture through the filter cartridge so as to bind the at least one biomacromolecule to the stationary phase particulate so as to form a biomacromolecule:stationary phase particulate product.

Abstract: A device (10) for separating liquid samples has a sample container (12), bottom wall (20) of which has an outlet opening (22) provided therein. The outlet opening (22) is joined by an outlet spout (24) extending in the axial direction of the sample container (12). On bottom wall (20) there is a separation layer (28). Below sample container (12), a collecting container (32) is arranged abutting sample container (12) such that an exchange of air between the interior of the collecting chamber (32) and the environment is possible, yet an escape of liquid is largely inhibited. The contact surface between collecting chamber (32) and sample container (12) and end (26) of the outlet spout (24) through which the liquid is discharged, are axially spaced apart.

Abstract: A thermosettable resin composition is prepared by admixing a liquid mixture of thermosettable resins such as a polyepoxide and amorphous thermoplastic polymer particles such as a polyetherimide to form a homogeneous cured resin composition. The particles have an average diameter of from 0.5-50 micrometers, a surface area of at least 1.0 m.sup.2 /g, a dissolution temperature of at least 50.degree. C., and are essentially insoluble in the thermosettable resin at temperatures of up to 15.degree. C. below the dissolution temperature but are completely dissolved at a temperature of at least 20.degree. C. below the cure temperature of the resin.

Abstract: This invention provides synthetic routes for novel single isomers of monocarbamate diols and their polymerization to provide novel polyesters, polyurethanes, polycarbonates, and the like having pendant carbamate groups on the polymer chain. Devices using some of these novel polymers which demonstrate nonlinear optical activity are also disclosed.

Abstract: Aqueous-based mixtures comprising colloidal vanadium oxide and a dispersed sulfonated polymer impart antistatic properties to coatings on a substrate and to self-supporting articles. The preferred colloidal vanadium oxide is alkoxide derived and provides mixed valence vanadium oxide wherein the vanadium ions are typically +4 and +5. Preferred sulfopolymers include sulfopolyesters, sulfopolyurethanes, sulfopolyurethanes/ureas, sulfopolyester polyols, and sulfopolyols. Antistatic composite structures comprising colloidal vanadium oxide and a sulfopolymer are also disclosed.

Abstract: A particle loaded, porous, fibrous compressed or fused article comprises a nonwoven fibrous polymeric web, which preferably is thermoplastic, melt-extrudable, and pressure-fusible blown microfibrous web, and sorptive particles enmeshed in said web, the particle loaded fibrous article has a Gurley number of at least two seconds, and the article is useful in separation science. A method of preparation of the article and method of use is also disclosed.

Abstract: A woven or nonwoven web, or film (e.g. polyimide) or foil is coated with a homogeneous cured composition comprising a liquid mixture of thermosettable resin(s) such as a polyepoxide and curative(s) such as aromatic polyamines and particles of an amorphous thermoplastic polymer such as a polyetherimide. The particles have an average diameter of from 0.5-50 micrometers, a surface area of at least 1.0 m.sup.2 /g, a dissolution temperature of at least 50.degree. C., and are insoluble in the thermosettable resin at temperatures of up to 15.degree. C. below the dissolution temperature but are completely dissolved at a temperature of at least 20.degree. C. below the cure temperature of the resin.

Abstract: Azlactone-functional polymer supports are useful reactive supports for the attachment of functional materials to provide novel adduct beads. The adduct beads are useful as complexing agents, catalysts, polymeric reagents, chromatographic supports, and as enzyme- or other biologically active supports. Novel carboxylate-functional polymer beads, are intermediates in the preparation of the azlactone-functional beads.Azlactone-functional supports have units of the formula: ##STR1## wherein R.sup.1 is H or CH.sub.3,R.sup.2 and R.sup.3 independently can be an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon and 0 to 3 S, N, and nonperoxidic O heteroatoms, or R.sup.2 and R.sup.3 taken together with the carbon to which they are joined can form a carbocyclic ring containing 4 to 12 ring atoms, andn is an integer 0 or 1, the azlactone functional supports having 0.

Abstract: A buried-ridge or buried-heterostructure II-VI laser diode. Polycrystalline II-VI semiconductor such as ZnS, ZnSSe, ZnSe or CdS deposited by vacuum evaporation buries the etched ridge.

Abstract: A II-VI laser diode including a substrate, a device layer of p-type II-VI semiconductor, an electrode and an ohmic contact layer between the electrode and device layer. The ohmic contact layer comprises a graded composition semiconductor compound including ZnTe. The relative amount of ZnTe in the semiconductor compound increases with increasing distance of the ohmic contact layer from the device layer. In a first embodiment the ohmic contact layer comprises a graded composition semiconductor alloy including the semiconductor compound of the device layer and ZnTe. The amount of ZnTe in the alloy increases with increasing distance of the ohmic contact layer from the device layer in the first embodiment. In a second embodiment the ohmic contact layer includes layers of ZnTe spaced between layers of the semiconductor compound of the device layer.

Abstract: A method for using atomic layer epitaxy (ALE) and/or migration enhanced epitaxy (MEE) to grow high efficiency quantum wells in II-VI laser diodes. The substrate and previously grown layers of the laser diode are heated to a temperature less than or equal to about 200.degree. C. in an MBE chamber. Sources of Cd, Zn, and Se are injected alternately into the chamber to grow a short-period strained-layer superlattice (SPSLS) quantum well layer including overlaying monolayers of Cd, Zn and Se. The quantum well layer is described by the notation [(CdSe).sub.m (ZnSe).sub.n ].sub.p where m, n and p are integers.

Abstract: Energy polymerizable compositions comprising at least one cyanate monomer and as curing agent an organometallic compound are disclosed. The compositions are useful in applications requiring high performance, such as high temperature performance; in composites, particularly structural composities; structural adhesives; tooling for structural composities; electronic applications such as printed wiring boards and semiconductor encapsulants; graphic arts; injection molding and prepregs; and high performance binders.

Abstract: An energy polymerizable composition and process therefore, comprising a cationically polymerizable material and a catalytically effective amount of an ionic salt of an organometallic complex cation as polymerization initiator, said ionic salt of an organometallic complex cation being capable of adding an intermediate strength nucleophile or upon photolysis capable of liberating at least one coordination site, said metal in said organometallic complex cation being selected from elements of Periodic Groups IVB, VB, VIB, VIIB, and VIIIB are disclosed. Certain of the organometallic metallic polymerization initiators are novel cationic salts.

Abstract: Novel, linear, film-forming polymers and copolymers can be coated on certain metal surfaces, which polymers or copolymers are derived from one or more classes of ethylenically-unsaturated monomers and include at least one novel monomer having a bidentate chelating moiety. The polymers which contain bidentate chelating groups provide significant and varied chemical modification to a metal surface. When coated on a metal surface the polymers are useful as a protective coating or a priming layer.

Abstract: An energy polymerizable composition comprises at least one ethylenically-unsaturated monomer, one of polyurethane precursors, and at least one epoxy monomer, and a curing agent comprising an organometallic compound, and an onium salt.

Abstract: A thermosettable resin composition having a viscosity that decreases during processing temperatures and increases as the temperature is raised to curing temperatures is provided. The composition comprises thermosettable resins and thermoplastic particles that are insoluble in the thermosettable resins at processing temperatures but soluble in the thermosettable resins at curing temperatures. Prepregs prepared from the thermosettable resin composition are also provided.

Abstract: A layered filter composite comprises a filter medium, and on the upstream surface thereof a homogeneous or graded layer of nonporous spherical glass microbeads as a filter aid. A method for filtering or prefiltering a liquid mixture is disclosed wherein a layer of glass microbeads is used as a filter or filter aid. The layered filter composite is useful in analytical applications as well as in large scale industrial and remedial (clean-up) applications.

Abstract: A composite marine structure comprises a marine substrate having adhered to at least a portion of its surface a layer of a water-permeable composite article comprising a non-woven fibrous web having entrapped therein active particulate to provide said marine substrate with protection against at least one of fouling and corrosion. Underwater surfaces such as ship hulls, buoys, docks, intake pipes, etc., can be protected against marine growth and corrosion by adhering thereto the composite sheet article of the invention.

Abstract: Crosslinkable copolymers suitable for use as elevated temperature pressure-sensitive adhesives comprise randomly arranged silarylene units and siloxane units. Preferably, there is present in the copolymer backbone in the range of 0.8 to 1.2 siloxane to silarylene units, and there being present in the copolymer a crosslinking functionality.