Abstract: A halogen containing fire retardant represented by chemical formula (1) wherein the end groups X and Y are composed by A or B represented by chemical formula (2); and the said fire retardant is a mixture of the composition containing 1 to 40% of X=Y=A, 30 to 70% of X=A and Y=B, smaller than 70% of X=Y=B and, degree of polymerization n is n.gtoreq.0 wherein the content of n=0 is smaller than 60% to the total amount. ##STR1## wherein A and B are represented by following chemical formulae, and R of chemical formula B is an alkyl group of carbon number 1 to 8 alone, or 1 to 79% of alkyl group of carbon number 1 to 8 and 79 to 1% of tribromophenyl group, and total amount of R is smaller than 80%.

Abstract: A method for vapor phase polymerization comprises blowing a gaseous monomer from a bottom of a fluidized bed reactor through a distributor plate into the reactor by means of a blower while feeding a solid catalyst into the reactor to thereby form a fluidized bed in the reactor and conducting a vapor phase polymerization to produce a polymer or copolymer, wherein the blower has a slide or rotational slide part between its discharge side as a high pressure side and its suction side as a low pressure side in a blower body casing, said slide or rotational slide part being provided with a noncontacted gas leakproof seal part at a clearance ranging from 0.7 to 2.5 mm.

Abstract: A regularly-shaped aluminosilicate useful as a blending agent for resins and coating materials, featuring low hygroscopic property, excellent pigment property, being capable of being easily dispersed in resins, and making it easy to carry out the blending operation. The regularly-shaped aluminosilicate comprises regularly-shaped sodium aluminosilicate particles obtained by firing a synthetic A or Pc zeolite, and has a nepheline or carnegieite crystalline structure, and further has an average particle diameter of from 0.5 to 30 .mu.m, an apparent specific gravity of from 0.3 to 0.8 g/cm.sup.3, an amount of oil absorption of not larger than 50 ml/100 g, a refractive index of from 1.46 to 1.56, and an amount of moisture absorption of smaller than 1% at a relative humidity of 90%.

Abstract: Disclosed is a foam processable rubber composition which comprises an ethylene/.alpha.-olefin of 3 to 20 carbon atoms/non-conjugated polyene copolymer rubber (A), a crystalline polyolefin resin (B) having a melting point of 100 to 150.degree. C. and a foaming agent (C), in specific proportions. The copolymer rubber (A) has an ethylene/.alpha.-olefin molar ratio of 60/40 to 80/20, an intrinsic viscosity (.eta.), as measured in decalin at 135.degree. C., of 0.7 to 2 dl/g, and an iodine value of 10 to 50. A vulcanized rubber foam-molded product can be obtained by vulcanizing and foaming the rubber composition. The rubber composition can provide vulcanized rubber foam-molded products having excellent vulcanization properties such as weathering resistance, heat resistance, ozone resistance and tear strength. Besides, the rubber composition exhibits excellent precision moldability and productivity of vulcanized rubber foam-molded products in transfer molding, injection molding and cast molding.

Abstract: The present invention provides useful intermediates for the synthesis of 2,5-diamino-1,6-diphenyl-3-hydroxyhexane derivatives which serve as intermediates in the synthesis of medicines such as retrovirus protease inhibitors including human immunodeficiency virus (HIV) protease inhibitors, and a method for preparing these intermediates using the former intermediates.More particularly, the invention provides methods for preparing a 2-isoxazoline derivative represented by formula ?1! and a 2,5-diamino-1,6-diphenyl-3-hydroxyhexane derivative obtainable by reducing the 2-isoxazoline derivative and represented by formula ?6!: ##STR1## (wherein Ph is phenyl; and each of R.sup.1 and R.sup.2 independently represents hydrogen, acyl, alkyloxycarbonyl, arylalkyloxycarbonyl, aryloxycarbonyl, alkylaminocarbonyl, arylalkylaminocarbonyl, arylaminocarbonyl, alkyl, arylalkyl, aryl, alkylsulfonyl, arylalkylsulfonyl, or arylsulfonyl, or R.sup.1 and R.sup.2 are linked to each other to represent divalent acyl).

Abstract: An optically isotropic film of an aromatic polyethersulfone, which is useful as a substrate for a liquid crystal display device, and an optically anisotropic, uniaxially oriented film of an aromatic polyethersulfone, which is useful as a phase difference plate for a liquid crystal display device. The optically isotropic film is produced by casting an aromatic polyethersulfone solution composition comprising 15 to 40 parts by weight of a solvent which contains at least 60% by weight of 1,3-dioxolane and can dissolve an aromatic polyethersulfone and 10 parts by weight of the aromatic polyethersulfone, on a substrate, and heating the cast solution composition containing a solvent to evaporate the solvent off.

Abstract: A process for producing a propylene polymer having an intrinsic viscosity (.eta.), as measured in decahydronaphthalene at 135.degree. C., of 1 to 12 dl/g comprises polymerizing propylene optionally with other olefins in the presence of an olefin polymerization catalyst comprising a transition metal compound represented by the formula ##STR1## wherein R.sup.1 and R.sup.2 are each a hydrogen atom or a hydrocarbon group of 1 to 3 carbon atoms,X.sup.1 and X.sup.2 are each a halogen atom, andY is a divalent silicon-containing group.

Abstract: A laminated film comprising (A) an aromatic polyester film; and (B) a hydrophilic coating layer which is present on at least one side of the aromatic polyester film (A) and has a surface energy of at least 54 dyne/cm, the coating layer comprising (a) 50 to 80% by weight of a copolyester which contains a dicarboxylic acid component having a sulfonate group in an amount of 1 to 16 mol % of the total of all dicarboxylic acid components and has a secondary transition point of 20 to 90.degree. C., (b) 10 to 30% by weight of poly(alkylene oxide) homopolymer having a number average molecular weight of 600 to 2,000, and (c) 3 to 25% by weight of fine particles having an average particle diameter of 20 to 80 nm, based on the total of components (a), (b) and (c). The above laminated film is useful as a transparency for an overhead projector and a recording paper for an ink jet printer.

Abstract: A biaxially oriented polyethylene-2,6-naphthalate film suitable for producing magnetic recording media wherein the film has a Young's modulus of at least 550 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of at least 800 kg/mm.sup.2 in the transverse direction with the Young's modulus in the transverse direction being greater than the Young's modulus in the longitudinal direction by more than 200 kg/mm.sup.2 ; a surface roughness Ra of 1-12 nm; and low heat shrinkage. The film also contains 0.005-2% by weight inorganic or organic fine particles.

Abstract: A copolymer of ethylene and an alpha-olefin having an ethylene content of from 30 to 90 mole %, a number average molecular weight of from 300 to 30,000 and a molecular weight distribution defined by a Q value (the ratio of the weight average molecular weight to the number average molecular weight) of not more than 3 and a Z value (the ratio of the maximum value of the molecular weight to the minimum value of the molecular weight when the molecular weight is measured by gel permeation chromatography) of from 15 to 200. The said copolymer can be produced by a process comprising copolymerizing ethylene with an alpha-olefin in the liquid phase in the presence of a polymerization catalyst composed of a combination of a soluble vanadium compound and an organoaluminum compound in the co-presence of hydrogen, characterized in that(a) the copolymerization is carried out in a continuous manner,(b) the concentration of the vanadium compound in the polymerization system is maintained at 0.

Abstract: The present invention provides a composition having sufficient strength and softness and excellent resistance against coloring, which is suited for use as a dental soft relining material. The present invention relates to a dental soft relining material which comprises 100 parts by weight of an organopolysiloxane (A) having in a molecule thereof at least two organic groups with a terminal unsaturated bond, an organohydrogenpolysiloxane (B) having in a molecule thereof at least three SiH groups, in such an amount that a ratio of the total number of SiH groups of (B) to the total number of terminal unsaturated bonds present in the organopolysiloxane molecules of (A) is from 0.5 to 5, a catalytic amount of a catalytic substance (C) for hydrosilylation reaction, 10 to 300 parts by weight of polyorganosilsesquioxane particles (D), and 1 to 50 parts by weight of hydrophobic silica particles (E) having a number of silanol groups per a unit surface area of not greater than 1/nm.sup.

Abstract: A spectacle lens formed from a resin composition which consists essentially of (1) 100 parts by weight of a polycarbonate resin; (2) 0.05 to 0.5 part by weight of an ultraviolet absorber (A) having a maximum absorption in a wavelenght of 300 to 345 nm when measured in a chloroform solution; and (3) 0.01 to 0.3 part by weight of an ultraviolet absorber (B) having a maximum absorption in a wavelenght of 346 to 400 nm when measured in a chloroform solution. The spectacle lens has excellent impact resistance and transparency and high absorbing power for ultraviolet light having a specific wavelength.

Abstract: A racemic compound of the formula (1) ##STR1## and an anti-ferroelectric liquid crystal composition consisting essentially of said racemic compound and one anti-ferroelectric liquid crystal compound of the formula (2) or a mixture of two or more compounds selected from anti-ferroelectric liquid crystal compounds of the formula (2), ##STR2## said composition having excellent steepness of threshold, having an anti-ferroelectric phase in a broad temperature range and having the performance of a high response speed and a high contrast.

Abstract: Disclosed is a propylene polymer composition comprising (a) a propylene polymer, (b) an olefin type elastomer and (c) a polar group-containing olefin polymer composition obtained by heating (c-1) an olefin polymer containing a carboxyl group or an acid anhydrous group in its molecule and (c-2) an amino compound, each in a specific amount. Also disclosed is a propylene polymer composition comprising (a) a propylene polymer, (b) an olefin type elastomer, (c-1) an olefin polymer containing a carboxyl group or an acid anhydrous group in its molecule and (c-2) an amino compound, each in a specific amount. The propylene polymer compositions of the present invention are excellent in properties of being coated with various coatings.

Abstract: A solid titanium catalyst component ?Ia! containing magnesium, halogen, titanium and a compound having at least two ether linkags with a plurality of intermediately existing bonding atoms; a catalyst and a prepolymerized olefin-containing catalyst prepared by using the solid titanium catalyst component ?Ia!; a method for preparing a polyolefin wherein said catalyst or prepolymerized olefin containing catayst is used. A catalyst and a prepolymerized olefin containing catalyst prepared by using a solid titanium catalyst component ?Ib! containing magnesium, halogen, titanium and a specific electron donor (al), and a compound having at least two ether linkags with a plurality of intermediately existing bonding atoms; a method for preparing a polyolefin wherein said catalyst or prepolymerized olefin containing catayst is used.

Abstract: Novel fluorine-containing 1,4-disubstituted piperidine derivatives, represented by general formula ?I! ##STR1## such as, for example, (2R)-N-?1-(6-aminopyridin-2-ylmethyl)piperidin-4-yl!-2-?(1R)-3,3-difluoroc yclopentyl!-2-hydroxy-2-phenylacetamide or pharmaceutically acceptable salt thereof, are potent and selective antagonists for muscarinic M.sub.3 receptors with little side effects. The compounds of formula ?I! exhibit excellent oral activity, duration of activity and pharmacolkinetics. They are useful for treatment and prophylaxis of respiratory diseases, such as chronic obstructive pulmonary diseases; urinary diseases, such as urinary incontinence; and digestive diseases, such as irritable bowel syndrome, and motion sickness.

Abstract: This invention provides a method for continuously forming an array of optical elements which includes feeding synthetic resin sheeting having a temperature in the flow temperature region of the synthetic resin directly to a thermoforming zone of embossing means; continuously pressing the sheeting against a mold provided on the embossing means and having a pattern for defining an array of optical elements while maintaining the sheeting at that flow temperature, to bring the sheeting into intimate contact with the mold and thereby form an array of optical elements on one surface of the sheeting; laminating a surfacing film to the side of the sheeting opposite to the mold as required; feeding a carrier film to the side of the resulting laminate opposite to the mold and bringing the carrier film into close contact therewith; and cooling the sheeting to a temperature lower than the glass transition temperature of the synthetic resin, as well as apparatus therefor.

Abstract: A novel R-configuration or S-configuration optically active alcohol of the formula (1),CF.sub.3 C*H(OH)(CH.sub.2).sub.m OCH.sub.2 CH.sub.n F.sub.3-n(1)wherein C* is an asymmetric carbon atom, m is an integer of 2 to 7, and n is an integer of 0 to 2, and a process for the production of the optically active alcohol from a monohalogenated alkyl having a fluoroalkoxy group at a terminal. The novel optically active alcohol, provided by the present invention, having a trifluoromethyl group on an asymmetric carbon atom and a fluoroalkoxy group at a terminal, is useful as a raw material for the production of a novel liquid crystal compound.

Abstract: The present invention provides lubricant oil compositions comprising a polyalkylene glycol carbonate. The lubricant oil compositions are useful for industrial gear oil, automotive gear oil, and lubricant oil for refrigerators, rolling installations and fibers, which are excellent in lubricating properties and detergency. The present invention also relates to lubricant oil compositions which comprise a polyalkylene glycol polycarbonate having mutual solubility with an ozone layer-nondestructive Freon such as Freon R-134a, and which are accordingly especially suited for refrigerators using hydrogenated fluorocarbon as a refrigerant. A polyalkylene glycol carbonate according to the invention comprises a polyoxypropylene group in the molecular chain and an alkyl group and an alkyloxyalkylene group at the molecular terminals.