Abstract: There are disclosed a molding material which is used for molding a styrenic polymer and which is capable of affording moldings that are excellent in solvent resistance and mechanical strength even when produced at a molding temperature almost same as that of ordinary atactic polystyrene, namely at a resin temperature of 260° C. or lower, dispensing with a melt kneading step; a process for producing a molding by molding the above molding material, which process enables to shorten molding cycle time and curtail the producton cost; and the moldings produced thereby. The molding material comprises a dry blend of 10 to 95% by weight of a (A) styrenic polymer having atactic configuration and 2 to 90% by weight of a (B) styrenic polymer having a melting point of 250° C. or lower, a weight average molecular weight of at most 200,000 and mainly syndiotactic configuration.

Abstract: The present invention provides a flame-retardant which is not only excellent in flame-retarding property but also devoid of lowering moisture-resisting property specially in the course of molding of a resin so that the flame-retardant has little limitation for the molding method, the molding conditions and the intended use thereof. What is characterized is a flame-retardant comprising (a) an aliphatic amine salt of a phosphoric ester with 2-25 carbon atoms in the ester moiety thereof having a melting point of at least 100° C. but not more than a molding temperature of a thermoplastic resin and (b) a salt of phosphoric and/or polyphosphoric acid, the proportion of the component (a) to the component (b), i.e. (a)/(b) being 1/2-5/1 by weight ratio.

Abstract: Provided are a polycarbonate resin composition containing a non-halogen flame retardant enough to ensure good flame retardancy and capable of being formed into good moldings having good impact resistance and good thermal stability; and such moldings of the composition. One type of the resin composition comprises 100 parts by weight of a resin mixture of (A) from 60 to 99% by weight of a polycarbonate resin and (B) from 1 to 40 % by weight of a styrenic resin, and from 0.1 to 10 parts by weight of (C) a functional group-having silicone compound, and from 0.02 to 5 parts by weight of (D) a fluoro-olefin resin; another type thereof comprises 100 parts by weight of (A) a polycarbonate resin, from 0.1 to 10 parts by weight of (C) a functional group-having silicone compound, and from 0.

Abstract: A catalyst which comprises a compound of a transition metal in Groups 8 to 10 of the Periodic Table having a nitrogenous tridentate ligand, a clay, clay minteral, or lamellar ion-exchanging compound, an organosilane compound, and organoaluminum compound, etc.; and a process for producing a polyolefin with the catalyst. The catalyst is highly active, does not adhere to reactor walls, and can give a polyolefin excellent in powder morphology. Consequently, a polyolefin (especially polyethylene) can be industrially advantageously produced.

Abstract: Using a mold equipped with a rib-forming member capable of moving forward and backward relative to the mold cavity, produced is a lightweight, hollow resin molding having a reinforcing rib structure in the hollow area, from a fiber-containing thermoplastic resin having a fiber content of from 10 to 70% by weight. To produce the molding, a melt of a fiber-containing thermoplastic resin is injected into the mold cavity or is injected thereinto under compression, then the movable mold member is moved backward in the direction in which the mold cavity is expandable, and after the start of the mold member moving, a gas is introduced into the resin melt. Even though the molding has a hollow structure and has a large surface area, it has good stiffness and high strength, and has good appearances. The weight of the molding can be well controlled and reduced to any desired degree. The molding has many applications in various fields.

Abstract: A decorative film or sheet having a laminate structure comprising a surface layer, an adhesive layer, and a layer having a pattern or a laminate structure comprising a surface layer, an adhesive layer, a layer having a pattern, an adhesive layer, and a substrate, wherein the surface layer is made of a film of a sheet comprising a resin which comprises (A) 100 to 60% by weight of a substantial homopolymer of polypropylene having a pentad fraction, a peak temperature of melting, and an enthalpy of melting each in a specific range and (B) 0 to 40% by weight of a thermoplastic elastomer copolymer and a decorative building material having a surface layer made of a film or a sheet comprising the above resin.

Abstract: There is disclosed a method of producing bisphenol A, in which bisphenol A is produced by condensation of phenol and acetone with the use of a cation exchange resin as a catalyst and a free mercaptan as a promoter, comprising feeding phenol and acetone to a multi-stage reactor in which at least two fixed bed-type adiabatic reactors packed with the cation exchange resin are arranged in series and a heat exchanger is provided at an inlet of each of the reactors, and controlling the temperature within each of the reactors so as not to exceed 90° C. With this method, elimination of sulfonic groups from the cation exchange resin as a catalyst can be suppressed, so that bisphenol A of high quality can be obtained, and the amount of the catalyst used can be reduced.

Abstract: Provided is a method for washing an impurities-containing polycarbonate/organic solvent solution with an aqueous washing solution, which comprises monitoring the viscosity of the mixture dispersion of the polycarbonate/organic solvent solution and the aqueous washing solution, and controlling the blend ratio of the aqueous washing solution in the system on the basis of the relation between the phase condition and the viscosity of the mixture dispersion. In the method of washing a polycarbonate/organic solvent solution with an aqueous washing solution, the amount of the washing solution to be used is reduced, and the mixture dispersion of the two solutions is stabilized at a high level of washing efficiency. The washing method is economical in practical use.

Abstract: The invention provides a method of producing styrenic resin granulates including dry-compression-molding a powder of styrenic resin having a syndiotactic configuration at a compression pressure of 1-20 t/cm and at a molding temperature falling within the range of the glass transition temperature of the powder of styrenic resin to the melting point thereof, inclusive; and crushing the resultant molded product. High-quality styrenic polymer granulates can be produced in an industrially advantageous manner by means of a large-scale apparatus for producing styrenic polymer having a syndiotactic configuration.

Abstract: Provided are scratch-resistant blow moldings of crystalline resin having good surface gloss of at least 80% and high surface hardness of at least HB. A crystalline resin melt parison is blown in a blow mold into a blow-molded article, where the temperature of the inner wall of the mold falls between 20° C. lower than the crystallization temperature of the crystalline resin and 5° C. lower than the melting point of the crystalline resin; then, a pressure fluid is introduced into the pinched parison; then the mold is heated to a temperature lower by 10° C. than the melting point of the crystalline resin and a temperature below the melting point of the crystalline resin.

Abstract: Disclosed is a resin composition containing the following components (A), and (B) or optionally, (C), (D), and (E):

Abstract: Provided is a continuous vapor-phase polymerization method for producing polyolefins. In the method, polymer agglomerates and aggregates are prevented from being formed, and polymer deposition on the wall of reactors and around stirring blades is prevented. The method enables continuous and stable production of high-quality polyolefins, with no pipe line clogging. The method is characterized by a specific supply mode of feeding a catalyst activity retardant such as alcohol into polymerization reactors. Specifically, the retardant is fed into the vapor phase in a polymerization reactor and into the powder phase therein through its side wall. Preferably, the retardant is fed into the powder phase through a plurality of sites of the side wall of the reactor.

Abstract: A catalyst which is able to express a high oligomerizing activity of ethylene and a method for the production of &agr;-olefin where ethylene is oligomerized using said catalyst are provided.

Abstract: Acetone and phenol are reacted in the presence of an acid-type ion exchange resin. The reaction mixture obtained from the reaction is subjected to a reduced-pressure distillation to recover bisphenol A as a fraction discharged from the bottom of a distillation column. Before the reaction, the acid-type ion exchange resin is washed with phenol to produce a phenol solution. The phenol solution is distilled together with a fraction obtained from the top of a distillation column. The bisphenol A produced in the process exhibits a stable hue.

Abstract: Provided are a propylenic random copolymer of propylene and ethylene satisfying the following (1) to (5), a composition comprising the copolymer, a film and a stretched film of the copolymer or its composition, and a laminate film and a stretched laminate film comprising at least one layer of the copolymer or its composition.

Abstract: A process for producing a polymer of an &agr;-olefin which comprises polymerizing an &agr;-olefin having at least 4 carbon atoms in the presence of a catalyst for producing polymers of olefins which comprises (A) a specific metal compound and (B) at least one compound selected from (b-1) an organoaluminum oxy compound and (b-2) an ionic compound. The polymer of an &agr;-olefin is useful as a component of lubricant.

Abstract: A flame-retardant polycarbonate resin composition comprising either a resin mixture of a polycarbonate resin and a styrenic resin, a functional group-having silicone compound, and a fluoro-olefin resin; or a polycarbonate resin, a functional group-having silicone compound, and a core/shell-type, grafted rubbery elastomer; or a resin mixture of a polycarbonate resin and a styrenic resin, a fluoro-olefin resin, an inorganic filler, and a polycarbonate-polyorganosiloxane copolymer and/or a functional group-having silicone resin, which composition and its moldings, exhibit good flame retardance, good impact resistance, and good thermal stability.

Abstract: There is disclosed a process for producing an ethylenic oligomer which comprises subjecting ethylene to oligomerization reaction in an organic solvent in the presence of a Ziegler based catalyst, and recyclingly using for the oligomerization reaction, the organic solvent separated by distilling the resultant oligomerization reaction product, wherein the water concentration in the oligomerization reaction system is at most 8 ppm by weight, or the concentration of olefins which have at least 3 carbon atoms and which are contained in the organic solvent to be recycled in the oligomerization reaction system is at most 2% by weight. The process of the present invention can maintain the catalytic activity of the catalyst at a high level.

Abstract: Long-chain, branched, propylene-based polymers, of which the melt index and the molecular weight distribution and the melt tension and the limiting viscosity both satisfy specific requirements, have good physical properties that are comparable to or better than those of conventional propylene-based polymers. They have good melt workability and are favorable to large-size blow molding and extrusion foaming. They are favorably used as miscibility improvers for propylene homopolymers and propylene-based copolymers.

Abstract: A laminated molding product having a surface member with superior property made of urethane foam and manufacturing process thereof are provided. The laminated molding product includes a thermoplastic resin base and an ether type urethane foam (131) mainly made of polyether polyol integrally attached by injection compression molding or injection molding under pressure of 50 kg/cm2 according to average pressure relative to project area of a molding cavity. The urethane foam may alternatively be ester/ether type urethane foam mainly made of polyester polyol and polyether polyol.