Abstract: A thermoplastic, segmented, linear copolyetherester elastomer of at least 70 weight percent soft segments, derived from poly(alkylene oxide) glycols and terephthalic acid, and hard segments constituting 10-30% of the elastomer and being 95 to 100% poly(1,3-propylene terephthalate). Melt-spun and drawn fibers of the elastomer have superior elastic and set properties versus comparable fibers made from such elastomers having hard segments of poly(ethylene terephthalate) or of poly(1,4-butylene terephthalate).

Abstract: Photographic silver halide elements containing aryl hydrazides as defined for the production of images with ultrahigh contrast and a new class of aryl hydrazides with a cationic group in the aryl radical as defined. The photographic silver halide elements can be developed at relatively low pH values and have low fog and low tendency to form black spots in unexposed or slightly exposed areas.

Abstract: This invention relates to stabilized aqueous compositions consisting essentially of a sulfonylurea or its agriculturally suitable salt with a salt of a carboxylic or an inorganic acid, or with mixtures of such carboxylic or inorganic acid salts, provided that the solubility of carboxylic or inorganic acid salts at 5.degree. C. and a pH of about 6-10 is greater than or equal to 3% and further provided that the pH of a 0.1 molar solution of the carboxylic or inorganic acid salt is between 6 and 10.

Abstract: An emulsion explosive composition comprising a discontinuous oxidizer phase and a continuous fuel phase is provided wherein the fuel phase comprises a nitroalkane compound. The composition essentially contains as the emulsifying agent a polyisobutylene succinic anhydride-based compound in admixture with an ester of 1-4 sorbitan and oleic acid. The composition demonstrates high explosive strength and excellent stability.

Abstract: A thermoformable laminate comprising (1) a polyaryletherketone sheet having repeating units derived from diphenyl ether having attached to one of the phenyl rings either a 1,4-phenylenedicarbonyl group or a 1,3-phenylenedicarbonyl group, the ratio of 1,4-phenylenedicarbonyl groups to 1,3-phenylenedicarbonyl groups being 70:30 to 0:100, preferably 60:40 to 0:100, especially 60:40 to 50:50, the sheet thickness being about 625-5000 micrometers, and (2) a polyvinyl fluoride film having a thickness of about 12.8 to 204 micrometers can be thermoformed at a temperature of about 160.degree.-200.degree. C., especially 170.degree.-195.degree. C. One important application of such thermoformable sheets is in fabricating three-dimensional panels for aircraft interiors.

Abstract: A method and apparatus for cofeeding additive concentrates in the form of pellets with a polymer flake stream flowing in a supply chute to a melt extruder. The pellets are introduced through an opening in the chute which is covered by an umbrella-like housing that has an opening facing the melt extruder. The flake flows around the umbrella-like housing creating a pocket to provide unimpeded entry of the pellets into the polymer stream.

Abstract: Aromatic polyimides of the formula: ##STR1## where --Ar-- is ##STR2## --Ar'-- is ##STR3## --Ar"-- is ##STR4## where --Z, and --Z.sub.1, independently are --Cl, --Br or --I; where --X, --X.sub.1, --X.sub.2 and --X.sub.3 independently are --CH.sub.3 or --C.sub.2 H.sub.5 ; and --Y,--Y.sub.1,--Y.sub.2 and --Y.sub.3 are primary or secondary alkyl groups having 3 to 12 carbon atoms, provided that when m is greater than 0, r is 0 and that when L is greater than 0, r and s are 0, are disclosed. These polyimides are very soluble, even in weak solvents such as toluene.

Abstract: An improved pipe-moving apparatus is disclosed having a pipe-insertable elongate member which is articulated for ease of use, particularly for pipe laying near trench ends. In a preferred form, the elongate member has a series of at least two carrier members pivotably interconnected end-to-end, with the proximal end of such series of carrier members attached to the controlling mechanism, and structure supporting the carrier members in alignment when the carrier member series is suspended by its proximal end. A highly preferred embodiment accommodates the removable insertion of one or more additional carrier members in the series to extend the length of the elongate member.

Abstract: Preparation of 3-picoline from 2-methylglutaronitrile in which the by-products, i.e., 3-methylpiperidine, 2-amino-3-picoline, and 2-amino-5-picoline are recycled and converted to 3-picoline.

Abstract: Novel compounds of the general formula ##STR1## wherein Ar represents a substituted or unsubstituted aromatic or heterocyclic group; W represents alkylene of from 1 to about 10 carbon atoms; and B represents --NR.sub.2 COR.sub.1, --NR.sub.2 CONR.sub.1 R.sub.3, --NR.sub.2 SO.sub.2 R.sub.1, --NR.sub.2 SO.sub.2 NR.sub.1 R.sub.3, or --NR.sub.2 COOR.sub.1 wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.1 is not hydrogen when B is --NR.sub.2 SO.sub.2 R.sub.1 or --NR.sub.2 COOR.sub.1, or R.sub.1 and R.sub.3 may together with N form a 5 to 7 membered heterocyclic group; and the pharmaceutically acceptable salts thereof. These compounds exhibit .beta.-adrenergic blocking activity and are also useful in the treatment of glaucoma.

Abstract: A package for cooking a waffle in a microwave oven is provided, comprising a microwave transparent tray about 28 to 38 mm deep, a lossy susceptor film lid having defined reflectance and absorbance, placed about 3 to about 10 mm over the waffle, providing means for moisture to escape. The waffle is coated with an edible food conditioner, to provide improved microwave susceptibility to the surfaces of the waffle. The waffle may be cooked alone or in the presence of a sausage side dish.

Abstract: Compounds of the present invention, are represented by the general formula ##STR1## wherein R represents a straight or branched loweralkyl from 1 to about 6 carbon atoms, loweralkene from 2 to about 6 carbon atoms, or ##STR2## where m is o or 1 and n is 2, 3, 4, or 5 provided that when m is o, n is 2, 3, 4, or 5 and when m is 1, n is 3 or 4, and R.sub.1 is hydrogen, a straight, branched or cyclic loweralky from 1 to about 6 carbon atoms or loweralkoxy, phenyl or substituted phenyl, and R.sub.2 represents a straight or branched loweralkyl from 1 to about 6 carbon atoms or W-B wherein W represents alkylene of from 1 to about 10 carbon atoms which may be substituted with loweralkyl of from 1 to about 4 carbon atoms; and B represents hydrogen, --NHCOR.sub.4, or --NHCONR.sub.3 R.sub.4, wherein R.sub.3 and R.sub.

Abstract: A compound having the structure ##STR1## where T is of the fomrula ##STR2## where each D.sup.1 and D.sup.2, independently, is a hydroxyl group of a group which is capable of being hydrolysed to a hydroxyl group in aqueous solution at physiological pH; a group of the formula ##STR3## where G is either H,F or an alkyl group containing 1 to about 20 carbon atoms and optional heteroatoms which can be N, S, or O; or a phosphonate group of the formula ##STR4## where J is O-alkyl, N-alkyl, or alkyl, each comprising about 1-20 carbon atoms and, optionally, heteroatoms which can be N, S, or O; T being able to form a complex with the catalytic site of an enzyme, X is a group having at least one amino acid, ##STR5## and each R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 is separately a group which does not interfere significantly (i.e., does not lower than Ki of the compound to less than 10.sup.

Abstract: An air intake system for an agricultural implement having a mobile frame, an internal combustion engine carried by the frame, a heat exchanger defining front and rear planar faces, an engine driven fan and a walled structure enclosing the engine, heat exchanger and fan. The walled structure defines a screened air inlet through which environmental air is drawn upon operation of the fan. An air plenum directs environmental air between the air inlet and the front face of the heat exchanger. The heat exchanger is mounted proximate to the fan toward one end of the air plenum. A bypass channel arranged adjacent the heat exchanger directs environmental air around the heat exchanger and exhausts a downstream of the rear face of the heat exchanger. Foreign material, carried in the environmental air, is likewise directed around the heat exchanger whereby preventing relatively rapid plugging of the heat exchanger.

Abstract: A silica catalyst that retains its high initial activity for a longer time is obtained by forming the catalyst from an aquasol that was obtained by mixing an alkali metal aluminate with an aqueous solution of alkali metal silicate.

Abstract: Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole with at least one fluoro comonomer selected from one or more of ten defined classes having a recited minimum mole proportion of perfluoro-2,2-dimethyl-1,3-dioxole, in no event less than 65%, have high glass transition temperatures of 140.degree. C. or higher, low indices of refraction, and good physical properties, and low dielectric constants, which make them suitable for cladding optical fibers as well as for many electronics applications, including the manufacture of substrates for circuit boards. They all are soluble at room temperature in perfluoro(2-butyltetrahydrofuran), which makes it practical to apply them as coatings from solution.

Abstract: In a process for degassing and filtering liquids, particularly coating emulsions, a feed stream (F) is subdivided into a process stream (N), which is fed continuously to a process use through a main filter (16), and a recycled fractional stream. The fractional stream (T) is used to backflush successive sections of the main filter (16) and in turn is filtered through a supplementary filter (21, 22). In the apparatus for the process, a backflushing device (17) is associated with the main filter (16), the fractional stream (T) is used as a flushing means and the filter surface of the main filter (16) is cleaned progressively. Thus, a liquid with a continually constant grain size distribution, without gas bubbles and particles that cause defects, can be delivered continuously to the specific use.

Abstract: A process is disclosed for manufacturing a high strength composite structure by needling individual webs of initially spunbonded material and then needle-punching a stack of the individual webs to enmesh and entangle filaments across the webs, with little or no loss of the initial filament-related strength.

Abstract: A lid structure for a polypropylene container is formed of a three ply laminate and a rehealable silicone rubber top layer adhered to the laminate. The laminate is polyester, polyvinylidene chloride and polypropylene heat sealed to the top rim of the container.

Abstract: A process for the preparation of 1,1,1,2-tetrafluoroethane by reacting 1,1,1,2-tetrafluoro-2-chloroethane in a polar aprotic solvent with zinc in the presence of a proton source at a temperature from about 65.degree. C. to about 250.degree. C.