摘要:
There is herein disclosed a multi-layer structure which can suitably be used to manufacture a container in which sealing properties are improved for the prevention of container breakage during sterilization by heating, cooking by heating, distribution or the like and heat resistance is improved for the prevention of container deterioration and which is excellent in opening properties; and a container having the above-mentioned excellent characteristics which comprises this multi-layer structure. According to the present invention, there are provided a multi-layer structure having two or more layers which comprises a surface layer (a) comprising a thermoplastic resin and having a thickness of 10 to 80 nullm and an adjacent layer (b) comprising a thermoplastic resin or a thermoplastic resin containing an inorganic filler, an interlaminar peeling strength between the surface layer (a) and the adjacent layer (b) being in the range of 0.3 to 2.0 kg/15 mm; and a container comprising this multi-layer structure.
摘要:
A process for producing a polymer of an null-olefin which comprises polymerizing an null-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 null-olefin is useful as a component of lubricant.
摘要:
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.
摘要:
A crystalline polyolefin resin composition contains: (A1) 4 to 20 wt % of a polyolefin resin component having an elution temperature of 36 to 104null C. and a molecular weight of 100,000 to 1,000,000 measured by TREF/SEC; and (B) 96 to 80 wt % of a crystalline polyolefin resin component different from the above component (A1), the wt % being based on the total weight of the components (A1) and (B).
摘要:
The polycarbonate resin composition of the present invention comprises (A) a copolyester carbonate having an aliphatic segment or a polycarbonate resin mixture containing the copolyester carbonate; (B) a functionalized silicone compound; and (C) a core-shell type rubber-like graft elastomer. Another polycarbonate resin composition of the present invention comprises a resin mixture comprising (Anull) a copolyester carbonate having an aliphatic segment or a polycarbonate resin mixture containing the copolyester carbonate and (Bnull) a styrene resin; and (Cnull) a polyfluoroolefin resin. By the combined use of the copolyester carbonate having an aliphatic segment with the functionalized silicone compound and the core-shell type rubber-like graft elastomer, or with the styrene resin and the polyfluoroolefin resin, the moldability/extrudability, i.e., melt fluidity, of the polycarbonate composition is improved while retaining the good impact resistance inherent to polycarbonate resin, thereby enabling the production of thin-wall shaped articles. The polycarbonate resin composition of the present invention is also improved in the flame retardancy without using a halogen- or phosphorus-containing flame retardant, and is therefore excellent in the heat resistance and the recyclability.
摘要:
The present invention is directed to a method for polymerizing olefins in a multi-stage polymerization apparatus including a gas-phase polymerization reactor in a subsequent stage. By use of the present method, the composition of gas in the gas-phase reactor is easily adjusted, and moreover, a polymer having an intended composition is produced in a consistent manner. In one aspect, the method for polymerizing olefins is performed in successive, multiple stages by use of a plurality of polymerization reactors disposed in series which include at least one gas-phase polymerization reactor after a first reactor, wherein a multi-component gas is removed from a gas-phase reactor and pressurized and/or cooled to thereby liquefy a portion of the gas; at least a portion of gas is discharged; and the remaining gas and the liquid are returned to the gas-phase reactor.
摘要:
The catalyst for polymerizing vinyl compounds according to the present invention comprises (A) a complex of Group 4 to 10 transition metal of the Periodic Table, (B) a clay, clay mineral or ion-exchangeable layered compound, and (C) at least one aluminoxy compound represented by Formula (1): 1 wherein a plurality of R groups are each independently C1-10 hydrocarbon group and at least one of the R groups is a hydrocarbon group having 2 or more carbon atoms; and x is an integer of 2 or more. By using the Group 4 to 10 transition metal complex and the clay, clay mineral or ion-exchangeable layered compound in combination with the specific aluminoxy compound, vinyl polymers are produced at a high efficiency. Also, the catalyst for producing null-olefins according to the present invention comprises (Anull) a complex of Group 8 to 10 transition metal of the Periodic Table, (Bnull) an organic compound-modified clay, clay mineral or ion-exchangeable layered compound, and (Cnull) at least one aluminoxy compound represented by Formula (2): 2 wherein a plurality of R groups are each independently C1-10 hydrocarbon group and at least one of the R groups is a hydrocarbon group having 2 or more carbon atoms; and y is an integer of 2 to 4. Since the organic compound-modified clay, clay mineral or ion-exchangeable layered compound absorbs other catalyst components between layers thereof, the elution of the catalyst components into liquid phase is effectively prevented, thereby facilitating the separation of the catalyst from a reaction product.
摘要:
The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.
摘要:
There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin having a modification rate of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and the ion exchange resin having a modification rate of 20 to 65 mol % is used for a methanol concentration in acetone of 250 to 8000 ppm by weight. The above process is capable of producing bisphenol A at high conversion and selectivity by suppressing deterioration of catalytic activity due to methanol as an impurity in acetone.
摘要:
A window 30 is a two-color molding comprising a transparent section 32 and a frame section 31 integrated with the transparent section 32, the frame section 31 and the transparent section 32 are formed with a first material and a second material respectively, and the first material is a thermoplastic resin with the linear thermal expansion coefficient in the MD direction lower by 1null10null5 to 3null10null5 (mm/(mm.K)) than that of the second material, and also with the MD/TD ratio for the linear thermal expansion coefficient in the range from 0.6 to 1.