Abstract: An active energy ray-curable composition substantially comprising at least one of (meth)acrylates and oligomers thereof represented by the following general formula (I) ##STR1## wherein R represents a hydrogen atom or a methyl group,X represents an alkylene group in which at least one hydrogen atom may be replaced by a hydroxyl group,m is 0 or an integer of 1 to 4,Y represents a hydrocarbon group having a cyclic hydrocarbon moiety therein, andn is 1 or 2.The composition is useful as an adhesive, particularly as one in the production of optical discs.

Abstract: The invention relates to an aromatic amine resin comprising a mixture of aromatic amine compounds represented by the following general formula (a): ##STR1## wherein A represents a phenylene, alkyl-substituted phenylene, diphenylene, diphenyl ether or napthylenyl group, R.sup.1 represents a halogen atom or a hydroxyl C.sub.1-4 alkoxy or C.sub.1 -5 alkyl group, l is 1 or 2, m is 0, 1, 2 or 3, n is an integer from 0 to 300 and when m is 2 or 3, the R.sup.1 group may be same or different and may join to form a 5- to 6-membered alicyclic moiety which may optionally contain one or more side chains, and also relates to processes for producing the same and a thermosetting composition containing the same.

Abstract: A process for preparing high purity bisphenol A comprising feeding continuously phenol and acetone in the presence of a hydrochloric acid catalyst into a first stage reactor and reacting phenol and acetone in the range of 20-60 mol % of acetone conversion and continuously removing the first reaction product from the first stage reactor. The first reaction product is fed into a second stage reactor and the reaction of phenol and acetone is completed to obtain a second reaction product from which bisphenol A is recovered.

Abstract: A process for producing a cycloolefin random copolymer, which comprises(1) copolymerizing (a) ethylene or both ethylene and an alpha-olefin having at least 3 carbon atoms with (b) a cycloolefin such as octahydronaphthalenes and bicyclo[2,2,1]hept-2-ene in the presence of (c) a catalyst formed from a soluble vanadium compound and an organoaluminum compound at least one of which has halogen, in (d) a liquid phase composed of a hydrocarbon medium to form a solution of a cycloolefin random copolymer, and(2) contacting the resulting copolymer solution with (e) an adsorbent containing a metal cation.

Abstract: A copper alloy suitable for use as the material of a heat exchanger contains 1 to 4.5 wt % of Zn, 1.0 to 2.5 wt %, preferably 1.5 to 2.0 wt % of Sn, 0.005 to 0.05 wt %, preferably 0.01 to 0.04% of P, and the balance substantially Cu and inevitable impurities, and has grain size not greater than 0.015 mm, preferably below 0.01 mm. The alloy exhibits high resistance levels to corrosion such as stress corrosion cracking, dezincification corrosion and so forth, as well as superior workability, strength and solder wettability, and, hence, can suitably be used as the materials of the constituents of a heat exchanger such as tanks, tube plates and tubes.

Abstract: In an automotive door locking apparatus according to this invention in which the lock lever is switched between the locked position and the unlocked position by a motor-operated actuator, when with the lock lever in the locked position the inner lever is manually operated, the rotating member is activated to disengage the ratchet from the latch while at the same time the lock lever and the actuator are returned to the unlocked position.

Abstract: Phenol is produced by dehydrogenating cyclohexenone through a vapor-phase reaction in the presence hydrogen using a solid-phase catalyst having platinum and alkali metal carried on a support.

Abstract: A process for the production of dihydric phenoles by oxidizing diisopropylbenzenes, which comprises oxidizing diisopropylbenzenes with molecular oxygen to obtain a reaction product mixture (A) containing at least diisopropylbenzene dihydroperoxide (DHP) and diisopropylbenzene monocarbinol monohydroperoxide (HHP), supply said product mixture (A) in a form of oily phase as a solution in an aromatic hydrocarbon solvent to an agitation reactor, supplying thereto at the same time, as an aqueous phase, hydrogen peroxide at a feed rate of 1-5 moles per mole of HHP contained in the product mixture and an acid catalyst in an amount sufficient to reach a concentration in the aqueous phase of 10-40% by weight, the concentration of hydrogen peroxide in the aqueous phase being maintained at a value of at least 20% by weight and the weight ratio of the oily phase/aqueous phase being at least 10, causing oxidization of the HHP into DHP by hydrogen peroxide while maintaining the reaction temperature at 30.degree.-60.degree.

Abstract: An injection-molding polyolefin composition suitable for obtaining an injection-molded article having excellent sliding property and excellent impact resistance and being free from delamination, said polyolefin composition being characterized in that(1) the composition consists substantially of an ultrahigh-molecular-weight polyolefin having an intrinsic viscosity of 10-40 dl/g as measured in decalin of 135.degree. C. and a low-molecular-weight to high-molecular-weight polyolefin having an intrinsic viscosity of 0.1-5 dl/g as measured in decalin of 135.degree. C.,(2) the ultrahigh-molecular-weight polyolefin is contained in the composition in an amount of 10-40% by weight based on the total weight of the ultrahigh-molecular-weight polyolefin and the low-molecular-weight to high-molecular-weight polyolefin,(3) the composition has an intrinsic viscosity [.eta.]c of 3.5-15 dl/g as measured in decalin of 135.degree. C.,(4) the composition has a melt torque T of 4.5 kg.

Abstract: There is here disclosed a method for removing nitrous oxide (N.sub.2 O), carbon dioxide (CO.sub.2) and dinitrogen difluoride (N.sub.2 F.sub.2) from a nitrogen trifluoride gas. The present invention is directed to a method for purifying a nitrogen trifluoride gas which comprises the steps of thermally treating, at a temperature of 250.degree. to 700.degree. C., a zeolite selected from the group consisting of analcime, clinoptilolite, mordenite, ferrierite, phillipsite, chabazite, erionite and laumotite; forming a packed bed of the treated zeolite; and passing the nitrogen trifluoride gas containing the gaseous impurities at a temperature of -125.degree. to 50.degree. C. through the filler layer.

Abstract: An .alpha.-olefinic random copolymer containing an .alpha.-olefin component having 5 to 10 carbon atoms and an .alpha.,.omega.-nonconjugated diene component having 6 to 20 carbon atoms, and optionally, a straight .alpha.-olefin component having 2 to 20 carbon atoms, wherein the copolymer comprises:(i) 70 to 99.9% by weight of a recurring unit (a) derived from the .alpha.-olefin, 0.1 to 30% by weight of a recurring unit (b) derived from the .alpha.,.omega.-nonconjugated diene and 0 to 20% by weight of a recurring unit (c) derived from the straight .alpha.-olefin component;(ii) an inherent viscosity [.eta.] measured in decalin at 135.degree. C. of from 0.5 to 10 dl/g;(iii) a crystallinity [Xc] measured by the X-ray diffraction method of from 0 to 50%;(iv) a glass transition temperature [Tg] of from 30.degree. to 60.degree. C.; and(v) an iodine value of from 0 to 10.

Abstract: A temperature history indicator and its manufacturing method wherein the indicators are formed as chips, labels, tags or the like and accompanied with those goods or their packings which must be stored at a certain temperature or lower and when their storage temperature rises higher than the certain temperature over a not-permissible time period, this fact can be visibly shown by development or change of color caused by chemical matters in the indicator, characterized in that when temperature rises higher than a certain value, a hydrophobic organic compound enclosed in microcapsules melts and diffuses causing a dye-precursor and a color developer, which are prepared independently of the compound, to be contacted with each other to irreversibly achieve color development or change, that this color development or change system is rendered operative when the temperature rise continues to exceed a permissible time period, and that when the tops of the color development or change systems are coated with a transpare

Abstract: This invention relates to a novel polyimide which is high-temperature resistant and capable of being molded in a fused state. This invention also relates to a high-temperature adhesive using the polyimide.The polyimide consists essentially of recurring units of the formula: ##STR1## where R is a tetra-valent radical selected from the group consisting of an aliphatic radical having 2 or more carbon atoms, alicyclic radical, monoaromatic radical, condensed polyaromatic radical, and non-condensed polyaromatic radical wherein aromatic radicals are linked to one another directly or via a bridge member.The polyimide can be prepared by reacting bis[4-(4-aminophenoxy)phenoxy)phenyl] sulfone with a tetracarboxylic dianhydride in an organic solvent and imidizing the resultant polyamic acid.

Abstract: A process for obtaining high-purity bisphenol A by removing most part of phenol from an adduct of bisphenol A with phenol and removing continously the residual phenol by steam stripping, wherein a multi-tubular packed column is used as a stripping equipment. The residual phenol in bisphenol A can be removed constantly. In addition, the process of the present invention is economical because the residual phenol can be removed with a small amount of steam.

Abstract: Disclosed are epoxy resin compositions comprising a 1,1-bis(4-hydroxyaryl) lower alkane type epoxy resin, hydroquinone and a reaction catalyst, or a 1,1-bis(4-hydroxyaryl) lower alkane type epoxy resin and N-aminoalkyl-substituted piperazine or a modified product thereof. These epoxy resin compositions as prepared are in a liquid state and hence resin moldings can be manufactured therefrom by such a simple technique as casting. It is also possible to cure these resin compositions at a temperature below 150.degree. C., and the resin moldings obtained therefrom are tough and excellent in impact resistance as well as in heat resistance.

Abstract: A coating material for a tendon for prestressed concrete includes a curing composition, the curing time of which is so controlled that the composition is held in an uncured fluid state for a predetermined time after the concrete hardens. After the predetermined time passes, the composition cures. By coating a tendon for prestressed concrete with the coating material having such properties, an antirust effect of the tendon, an improved adhering force of the tendon to the concrete and a decreased cost of manufacturing prestressed concrete can be obtained.

Abstract: Polyurethane base lens resins obtained by reacting one or more of sulfur-containing polyisocyanates compound with one or more of sulfur-containing polyols, and polyurethane base lenses comprising these resins are disclosed.A method for preparing polyurethane base lenses which comprises adding internal mold releasing agents to the mixture of the above polyisocyanates and polyols prior to casting polymerization is also disclosed.

Abstract: A method of and apparatus for the detection of insulation deterioration in an electrical power supply system utilizes the detection of a progressive wave generated by a corona discharge or partial discharge due to such insulation deterioration. Sensing of said progressive wave may be effected by an apparatus comprising: a first coil having two primary windings, wound with the same number of turns and in the same direction, and a secondary winding, the primary and secondary windings being wound on a core whose magnetomotive force and magnetic flux density are roughly proportional to each other; a second coil composed of a primary winding and a secondary winding both wound on a core whose magnetomotive force and magnetic flux density are roughly proportional to each other; and an impedance circuit.

Abstract: A phenol and/or a cyclohexanone is prepared by dehydrogenation of cyclohexenone and/or a cyclohexenol in liquid phase under the presence of a solid catalyst comprising a platinum-group metal loaded on a carrier. The solid catalyst comprises a carrier selected from activated carbon and hydrotalcites.

Abstract: A method for forming projections on the periphery of a pipe in order to provide branch pipes, such as a manifold for automobiles, is characterized in that the branch pipes are formed by a bulging process to have a predetermined thickness without thinning. A first embodiment includes the step of indenting a pipe member by press work or the like, at locations close to the position of a projection which is to be formed, in a preliminary deforming process. The deformed pipe member is then placed in a bulge mold having a recess or space, with the pipe member being positioned so that the indentations in the pipe member lie adjacent the recess in the bulge mold. Pressurized fluid is then introduced into the interior of the pipe member to bulge the wall of the pipe member into the recess in the bulge mold. A second embodiment employs a bulge mold having fixed recesses or spaces and variable recesses or spaces for forming a plurality of projections.