Abstract: Hydroxyethylated polybenzimidazole fibers are produced by a wet jet/wet spinning or by a dry jet/wet spinning process. A spinning solution of hydroxyethylated polybenzimidazole is extruded vertically downward through a spinneret into a liquid coagulation bath. The resulting fibers have pore sizes ranging from about 5 angstroms up to about 100 angstroms and are quite useful as ultra filters for molecules with a broad range of molecular weight.

Abstract: New optical brighteners of the general formula ##STR1## in which R denotes hydrogen, alkyl, alkoxyalkyl, cyclohexyl, methylcyclohexyl, benzyl, phenylethyl, phenyl, alkylphenyl or xylyl,X denotes a C.sub.2 -C.sub.7 -alkylene group or a bridge member of the formula --X.sup.1 --(OX.sup.2).sub.n -- in which X.sup.1 and X.sup.2 denote C.sub.2 H.sub.4 or C.sub.3 H.sub.7 and n denotes 1 or 2 and Me denotes a proton, an alkali metal cation or a cation NH.sub.2 R.sup.1 R.sup.2 in which R.sup.1 and R.sup.2 represent hydrogen, alkyl or hydroxyalkyl.

Abstract: This invention provides an optical medium which consists of a composite of homogeneous inorganic oxide glass monolith with a microporous structure containing a liquid crystalline component.In one embodiment this invention provides a sol-gel process for producing a composite of a transparent homogeneous microporous inorganic oxide glass monolith and a liquid crystalline compound.

Abstract: A syringe-needle-like nozzle for tissue adhesive comprising a hub and a deformable cannula without a bevel, the cannula being made of high-ductile metallic material for medical use and fixed in the hub. The nozzle of the present invention is satisfactorily applicable in tissue adhesive injection to complex regions or small regions in organism. Further, there can be carried out the injection of tissue adhesive to different regions by means of suitable deformation of the nozzle shape.

Abstract: Sintered polybenzimidazole articles are obtained by compacting a particulate, dried polybenzimidazole resin under a pressure of 2,000 to 10,000 psi in a mold, heating the formed article to a temperature in the range of 825.degree. to 950.degree. F. for at least four hours, cooling the polybenzimidazole article to below 800.degree. F. while maintaining the article under a pressure of 2,000 to 10,000 psi, and thereafter heating the constrained formed polybenzimidazole article to a temperature in the range of 825.degree. to 950.degree. F. for at least one hour.

Abstract: Compounds of the formula ##STR1## in which X denotes O or S; R and R.sup.1 denote H, halogen, alkyl, alkoxy, CN, NO.sub.2 or CF.sub.3 ; R.sup.2 denotes H or alkyl; Y denotes an optionally substituted alkylene or phenylene group and Z denotes a carboxyl, carboxylate, carboxylic acid ester, carboxamide, nitrile or thioamide group, are suitable for reducing the phytotoxicity of herbicides in useful plants.

Abstract: This invention describes an improved process for the production of C.sub.1 -C.sub.8 alkyl acrylate by the reaction of a C.sub.1 -C.sub.8 alkyl alcohol with acrylic acid in the presence of esterification catalysts and soluble manganese or cerium ions.

Abstract: The disclosed light-sensitive recording material is composed of an electrically conductive support, suitable for the production of printing forms or printed circuits, an a photoconductive layer system containing a photoconductor, a binder, a sensitizing dye and conventional additives. The photoconductive system comprises (A) a single photoconductive layer, or multiple layers, applied to the support and (B) a light-sensitive covering layer which contains at least one photochemically reactive compound. The use of the recording material in a process for the production of printing forms and printed circuits is also disclosed.

Abstract: The invention relates to new thyronine derivatives of the formula ##STR1## in which n is 1-6, R denotes hydroxyl, alkyl or aryl, R.sup.1 and R.sup.2 are identical or different and denote iodine or hydrogen, and R.sup.3 denotes hydrogen, alkyl or aralkyl, a process for the preparation thereof, and the use thereof for carrying out radioimmunoassays.

Abstract: The invention relates to a process for extracting nitrohydroxyaromatics from aqueous solutions. In this process, the extracting agent used is an amine salt which comprises an aliphatic amine having a total carbon number of 10 to 75 and a strong acid. The amine salt can be employed undiluted or diluted with an organic solvent.

Abstract: This invention relates to 1-[n-(2-alkylthio-10H-phenothiazin-10-yl)alkyl]-4-benzoylpiperidines and methods for treating pain or psychosis utilizing compounds or compositions thereof.

Abstract: On extrusion of thermoplastic melts, flow anomalies occurring in the extrusion dies can be decisively reduced when dies are used whose surfaces coming into contact with the melts are provided with a thermally applied spray coating.

Abstract: This invention relates to spiro-[(piperidine-, pyrrolidine-, or -hexahyroazepinyl substituted) pyrrolo[2,1-c][1,4]-benzoxazepines] having the following formula ##STR1## wherein R is hydrogen, lower alkyl, arylloweralkyl, acyl, lower alkenyl, lower alkynyl, and loweralkylbenzisoxazole; X is hydrogen, halogen, loweralkoxy, and trifluoromethyl; Y is hydrogen; 2' or 3' acyl, formyl, carbinol of the formula ##STR2## wherein R.sub.1 and R.sub.2 are the same or different and are independently hydrogen, loweralkyl, arylloweralkyl, aryl, loweralkenyl, lower alkynyl and lower alkylbenzisoxazole; loweralkyl, loweralkenyl and halogen; and n is an integer of 1 to 3. The compounds of this invention display utility as analgesic and antihypertensive agents.

Abstract: Ceramic heat exchangers having narrow cross-sections are sealed by filling one side (which later will be the cold side) of the heat exchanger with a liquid synthetic resin and generating there a pressure higher than that on the other side (which later will be the hot side) of the heat exchanger, removing the excess resin and fully curing the synthetic resin. The process is suitable especially for ceramic heat exchangers of silicon nitride. In this case, a suspension of finely dispersed abrasive in a liquid phase can be pumped, before the treatment with the liquid synthetic resin, through that side of the heat exchanger which will later by the cold side, until the silicon nitride whiskers formed on reaction firing have been mechanically removed, and the heat exchanger can then be rinsed and dried.

Abstract: Aqueous pigment preparations which contain (a) 5 to 80% by weight of a finely-divided inorganic and/or organic pigment, (b) 5 to 80% by weight of an aequeous polyurethane dispersion, (c) 2 to 80% by weight of water and (d) 0 to 50% by weight of an organic solvent.

Abstract: A diazonium salt polycondensation product which comprises units of(a) a diazonium salt represented by the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are hydrogen atoms, halogen atoms, alkyl groups or alkoxy groups andX is the anion of an aminoalkanesulfonic acid, and(b) a compound represented by the formulaR.sup.4 --O--CH.sub.2 --R.sup.6 --CH.sub.2 --O--R.sup.5 (II)in whichR.sup.4 and R.sup.5 are hydrogen atoms, alkyl groups or aliphatic acyl radicals andR.sup.6 is the radical of an aromatic hydrocarbon, a phenol, a phenol ether, an aromatic thioether, an aromatic heterocyclic compound or an organic acid amide,and which is suitable as a light-sensitive substance for the preparation of planographic printing plates that can be developed with pure water.

Abstract: Use of a resin mixture of, or of a mixed resin from, a melamine-formaldehyde resin and an anionically modified melamine-formaldehyde resin for tanning leather. The anionic modification of the melamine-formaldehyde resin is obtained by preparing the resin in the presence of alkali metal sulfite, alkali metal hydrogensulfite or alkali metal sulfamate. By partial modification it is possible to obtain a mixed resin, while mixing a modified with an unmodified resin gives a resin mixture.

Abstract: A process for surface modification of oriented polymeric film is disclosed. The process, applicable to polyesters, polyolefins, and polyamides, involves subjecting the film surface to at least one short pulse of intense electromagnetic radiation. Such surface treatment enhances the heat seal adhesion of the oriented polymeric film.

Abstract: In one embodiment this invention provides novel microporous inorganic oxide glass monolith structures, which have improved mechanical strength and optical transparency. An invention glass monolith is produced by a novel sol-gel process, which utilizes trioxane as an essential additive during the gellation phase, to provide a glass monolith with micropores having uniformity of size and shape.

Abstract: A new monomer is used to prepare homo or copolymers containing blocked imide groups which are characterized by deblocking in two stages, first when acid catalyzed and thereafter in aqueous alkaline solutions. Such polymers are, therefore, especially useful in formulating positive photoresist cmpositions. The polymers are combined with a latent photoacid, which when exposed to actinic radiation removes the acid sensitive blocking moiety, preferably an acetal or ketal group, leaving a methylol group or substituted methylol group remaining attached to the nitrogen atom, which groups are subsequenctly removed by exposure to aqueous alkaline developing solutions, leaving only imide groups, ##STR1## The new monomer is a derivative of maleimide in which the imide hydrogen has been replaced with a methylol group, which is subsequently reacted to form an acetal or ketal. Preferred monomers include N-(2,4-dioxa-3,3-dimethylpentyl)-2H,5H-2,5-dioxopyrrole and related compounds.