摘要:
A highly crystalline propylene polymer composition which is obtained by preliminarily polymerizing, in the presence of a catalyst comprising a solid titanium trichloride catalyst complex containing a complexing agent and having an aluminum content of at most 0.15 by atomic ratio of aluminum to titanium and an organoaluminum compound and optionally an electron donative compound, 3-methylbutene-1 in an amount exceeding 10 g per g of the solid titanium trichloride catalyst complex and then polymerizing propylene, or propylene and other .alpha.-olefin having from 2 to 18 carbon atoms, in an amount of at least 500 g per g of the solid titanium trichloride catalyst complex, and which contains from 0.01 to 20% by weight of the 3-methylbutene-1 polymer based on the total weight of the 3-methylbutene-1 polymer-containing propylene polymer composition.
摘要:
A method for producing an olefin polymer, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising:(A) a solid catalyst component obtained by thermally reacting (a.sub.1) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 which may be the same or different is an alkyl group, an aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, (a.sub.2) a titanium compound of the formula Ti(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (a.sub.3) a silicon compound of the formula Si(OR.sup.4).sub.4 wherein R.sup.4 is an alkyl group, an aryl group or an aralkyl group and contacting and treating (a) the resulting thermal reaction product with (b) a halogen-containing titanium compound and (c) an electron donative compound, and(B) an organometallic compound of a metal of Groups I-III of the Periodic Table.
摘要:
Disclosed is a solar cell module which can collect solar light to a solar cell, while reducing accumulation of dusts and particles. The solar cell module is provided with a plurality of bifacial solar cells. The solar cells are coated together with a sealing film formed of a sealing resin material. A front surface side transparent board is bonded on the upper surface in the gravity direction, i.e., the front surface of the sealing film. On the front surface side of the front surface side transparent board, a lenticular lens is arranged for collecting solar light to a solar cell by refracting solar light entered from the front surface side of the solar cell module. On the lower surface in the gravity direction, i.e., the rear surface, of the sealing film, a rear surface side transparent board is bonded. On the rear surface side of the rear surface side transparent board, an uneven reflection film is arranged for reflecting solar light entered from the front surface side of the solar cell module and collecting the light to the solar cell.
摘要:
The present invention relates to a catalyst for polymerization of &agr;-olefin, which comprises: an essential component (A) of a transition metal compound, an essential component (B) of an ion exchangeable layer compound except for silicate, or an inorganic silicate, and an optional component (C) of an organoaluminum compound, said component (A) being represented by the general formula (I):
摘要:
A method for polymerizing olefins which comprises using a catalyst which comprises, as the essential components, (A) a metallocene-type transition metal compound and (B) at least one member selected from the group consisting of (1) an ion-exchanging layered compound other than a silicate and (2) an inorganic silicate, which is obtained by salt-treatment and/or acid-treatment and which has a water content of not higher than 1% by weight.
摘要:
A catalyst for polymerizing an olefin, which comprises (A) a metallocene transition metal compound, (B) (1) an ion-exchanging layered compound other than a silicate or (2) an inorganic silicate prepared by treating a starting ion-exchanging layer compound other than a silicate or a starting silicate with a salt, an acid, or a combination thereof, said component (B) having a water content not higher than 1% by weight which is obtained by heat-dehydrating component (B) under an inert gas atmosphere or under reduced pressure, and (C) an organoaluminum compound.
摘要:
A blow molded container made of a polypropylene resin obtained by injection stretch blow molding of a polypropylene resin in which the polypropylene resin is a propylene polymer composition containing from 0.0001 to 10% by weight of 3-methylbutene-1 polymer, as well as medical instruments comprising the blow molded container made of the polypropylene resin.
摘要:
A method for producing an olefin polymer, which comprises polymerizing or copolymerizing an olefin in the presence of a catalyst comprising (a) a titanium-containing solid catalyst component and (b) an organic metal compound of a metal of Groups I-III of the Periodic Table, said solid catalyst component (a) being obtained by treating (A) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 is an alkyl group, an aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, with three compounds i.e. (B) an electron donative compound, (C) a silicon compound of the formula Si(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (D) a titanium compound.
摘要:
Disclosed herein is an optical fiber cable produced by pumping a two-liquid mixing and curing-type polyurethane resin which has the specified values in a tensile break strength, a breaking extension, a creep characteristics and the compression modulus of elasticity, in voids surrounding the optical fibers and those surrounding tension members of the cable.
摘要:
The present invention aims to provide a method for manufacturing a solar cell module capable of improving positioning accuracy of solar cell elements relative to a light reflection plate. When a solar cell module is manufactured, a corrugated light reflection plate 4 is first prepared by bonding a thermoplastic resin film 7 to a plastic substrate 6. Subsequently, the light reflection plate 4 is set on a lower mold 10, and a thick resin sheet 12 made from an encapsulation resin is arranged on the light reflection plate 4. Then, vacuum suctioning and hot-press processing are performed sequentially, whereby a precursor assembly 13 is formed with the light reflection plate 4 and the resin sheet 12 attached together. Subsequently, a plurality of solar cell elements 2 is placed on an upper surface of the precursor assembly 13. Then, a thin resin sheet 14 made from the encapsulation resin is arranged on the solar cell elements 2, and a front surface plate 3 is arranged on the resin sheet 14. Subsequently, a cross-linking reaction of the encapsulation resin proceeds with a dry laminator, thus the respective solar cell elements 2 are laminated.