Abstract: Color properties of crude phenolic esters of aromatic dicarboxylic acids are improved by subjecting the esters to hydrogenation in the presence of hydrogen and a hydrogenation catalyst.

Abstract: A photosensitive polyimide polymer composition comprising a solvent soluble polyimide condensation product of an aromatic dianhydride and an aromatic diamine, a polyfunctional ethylenically unsaturated monomer and a photoinitiator. The solvent soluble polyimides of the composition are prepared from at least one compound selected from 2,2-hexafluoro-bis-(3,4-dicarboxyphenyl)tetracarboxylic dianhydride; 1,1-bis-[4-(1,2-dicarboxyphenyl)]-1-phenyl-2,2,2-trifluoroethane dianhydride; 2,2-hexafluoro-bis(3-aminophenyl)propane; 2,2-hexafluoro-bis(4-aminophenyl)propane; 2,2-hexafluoro-bis-[4-(3-aminophenoxy)phenyl]propane; 2,2-hexafluoro-bis-[4-(4-aminophenoxy)phenyl]propane and 1,1-bis-(4-aminopheny)-1-phenyl-2,2,2-trifluoroethane or mixtures thereof.

Abstract: The instant invention involves a process used in preparing fibrous tows which may be formed into polymeric plastic composites. The process involves the steps of (a) forming a tow of strong filamentary materials; (b) forming a thermoplastic polymeric fiber; (c) intermixing the two tows; and (d) withdrawing the intermixed tow for further use.

Abstract: Compounds having a dithiopyridyl moiety linked to a biotin moiety are useful as thiol specific biotinylating agents. The biotin label can be cleaved in a reducing environment to yield the native thiol.

Abstract: Segmented thermoplastic copolyester elastomers containing recurring polymeric long chain ester units derived from phthalic acids and long chain glycols and short chain ester units derived from phthalic acids and 1,4-butanediol or 1,4-butenediol. The elastomers also contain polyvinylpyrrolidone and preferably also contain guanidine stabilizer, phosphorus stabilizer and diphenylamine.

Abstract: A method is provided for preparing alkenylthiophenols, e.g., para-vinylthiophenol, or their esters, e.g., para-vinylthiophenol acetate by reacting a hydroxy aromatic ketone, e.g., 4-hydroxyacetophenone (4-HAP) with an N,N-di(organo)thiocarbamoyl halide, e.g., N,N-dimethylthiocarbamoyl chloride (DMTC) to form an O-(acylaryl) N,N-di(organo)thiocarbamate, e.g., O-(4'-acetophenyl) N,N-dimethylthiocarbamate, and pyrolytically rearranging the latter compound to form an S-(acylaryl) N,N-di(organo)thiocarbamate, e.g., S-(4-4- -acetophenyl) N,N-dimethylthiocarbamate. In one procedure, the latter compound is directly reduced to form an S-(1-hydroxyalkylaryl) N,N-di(organo) thiocarbamate, e.g., S-[4'-(1-hydroxyethyl)phenyl] N,N-dimethylthiocarbamate, which is either hydrolyzed to form a (1-hydroxyalkyl) thiophenol, e.g., 4'-(1-hydroxyethyl) thiophenol, which optionally after acylation of its thiol group, is dehydrated to form the alkenylthiophenol wherein the double bond is at the ring-bonded carbon atom, e.g.

Abstract: There is provided a method of moving the position of the focal point of an optical system in an optical data storage device. A membrane reflector having an electrically controllable surface contour is provided in the optical system and the reflector's surface contour is controlled so as to move the focal point on the data storage medium of the optical data storage device. The optical system comprises a source of plane-polarized light, a polarizing beam splitter, first and second quarter-wave plates, the membrane reflector and an objective lens.

Abstract: Compounds having a dithiopyridyl moiety linked to a biotin moiety are useful as thiol specific biotinylating agents. The biotin label can be cleaved in a reducing environment to yield the native thiol.

Abstract: Resin compositions, soluble in odorless mineral spirits, autooxidizable and air-dryable after application to textiles, leather, wood or other surfaces to form soil, oil and water-repellent coatings. The resin compositions are terpolymers comprising a fluoroaliphatic vinyl monomer, a hydroarbyl higher alkyl vinyl monomer and an acrylic or methacrylic ester of a compound having one or more unsaturated olefinic bonds, which latter ester imparts autoxidizability to the compositions.

Abstract: Resin compositions, soluble in odorless mineral spirits, and dryable at room temperature after application to textiles, leather, wood or other surfaces to form soil-oil and water-repellent coatings. The resin compositions are terpolymers comprising a fluoroaliphatic vinyl monomer, a hydrocarbyl higher alkyl vinyl monomer and a polyfunctional vinyl monomer selected from the group consisting of (a) a vinyl amido glycolate ether monomer; (b) a monomeric vinyl diketo ester monomer and (c) a vinyl ester monomer containing hydroxy and halide groups.

Abstract: Improved melt spinning of friable, thermally sensitive organosilicon preceramic polymers is obtained by using externally-metered feed means for continuous feeding of the polymer to an extruder. Starve feeding by metering the feed at a rate less than that required to fill the feed screw flights prevents pulverizing and compaction of the friable polymer, leading to cross-linking of trapped polymer and solid plugging, which would cause the extruder to bind and cease to function. Metered feed can be obtained by either monitoring of screw loading or discharge pressure and adjustment of hopper feed rate or control based upon measured values of extruder speed or metering pump speed.

Abstract: The instant invention involves a method for warming cold or frozen engines in low temperature conditions, such as minus 40.degree. F. or below. The method involves draping a fabric bag containing a flammable compound, such as trioxane, over an engine and igniting the flammable compound.

Abstract: Low Tg copolymers of trioxane and 1,3-dioxolane which have a dioxolane content greater than 65 mol percent and less than about 75 mol percent and an IV of from about 1.0 to about 2.3, and which are non-crystalline at room temperature or above, are disclosed. These polymers, when blended with crystalline oxymethylene polymers, improve the latter's impact properties. They can also be used as adhesives for crystalline oxymethylene polymers.

Abstract: Cubelets are made from a piezoelectrically active ceramic material having holes therein which may be cross-cored. The holes are selectively filled with a liquid curable resin, such as an epoxy. The cubelets may also be formed from bonded or sintered "half-shapes" containing half cores, wherein a face bisects one hole or an array of holes or cross-cored holes to form one or an array of semicircular grooves or crossed semicircular grooves. The cubelets, whether filled with resin or having unfilled internal volume, are arranged in a precision array within the snug-fitting cavities of a lattice, whereby the holes are sealed off, to form a cubelet/lattice assembly which is then electroded and poled in an electric field and encapsulated in polymer to form a part of a hydrophone assembly, for example.

Abstract: This invention provides a sustained release composite composition which consists of an inorganic oxide glass monolith with a microporous volume that contains a volatile organic component and a nonvolatile organic component.In one embodiment the invention provides an article of jewelry which contains an invention composite with a gem-like appearance and a sustained release fragrance.

Abstract: An organic solvent free developing composition which comprises an aqueous admixture having a pH of from about 6.8 to about 7.2 of(a) one or more components selected from the group consisting of tri-sodium, -lithium, or -potassium phosphate, or sodium, lithium or potassium carbonate; and(b) one or more components selected from the group consisting of sodium, lithium, or potassium benzoate or salicylate; and(c) one or more components selected from the group consisting of sodium, lithium, potassium, magnesium or calcium octyl, decyl or dodecyl sulfate; and(d) one or more components selected from the group consisting of mono-sodium, -lithium, or -potassium phosphates and carbonates, and(e) sufficient water to formulate an effective developer.

Abstract: The present invention relates to a novel extruder screw and method for extruding low melt viscosity polymers which form an anisotropic melt phase. In a preferred embodiment, the method and apparatus according to the present invention employ a high rate of rotational speed of the extruder screw in combination with a relatively low compression ratio and a high volume rate of flow through a compression section in order to effectively extrude the low melt viscosity liquid crystalline polymers. The particular design of the screw is dictated by the unique rheology of the polymers which are difficult to effectively move along the helix of the screw due, in part, to the extremely low viscosity. Each dimension and each relative size of the various sections of the screw must be carefully controlled in order to effectively extrude the unique material.

Abstract: The invention provides a method for developing negative working photographic elements using an aqueous developer comprising(a) a solvent composition consisting essentially of(i) n-propanol or isopropanol; and(ii) a glycol ether or acetate(b) a salt which is preferably magnesium sulfate; and(c) an ethoxylated alkyl phenol type non-ionic surfactant.

Abstract: A low warp, filled polyoxymethylene composition comprises a bimodal distribution of glass beads.

Abstract: A method is described for making an electroconductive composite sheet electrode which is conformable and in which a slit-and-expanded or perforated nickel screen is embedded by heat and pressure, so that electrical leads can be easily and strongly attached to the nickel screen before or after integrally bonding a electroconductive sheet electrode to each side of at least one adjacent piezoelectric ceramic/polymer composite sheet electrode which is non-conductive. After poling, the resultant transducer has an increased combined transverse stiffness which increases the hydrostatic voltage coefficient, g.sub.h, as well as the overall hydrophone Figure of Merit.