Abstract: A silsesquioxane derivative represented by Formula (2): wherein R is hydrogen, an alkyl, an aryl, or an arylalkyl; and X is hydrogen, chlorine, a functional group, or a group having a functional group.

Abstract: The present inventors have obtained a PSQ derivative of a completely condensed type into which a functional group is readily introduced by using a novel PSQ derivative of an incompletely condensed type in which four alkaline metal atoms are bonded to silsesquioxane of a cage type having eight Si's. The above silsesquioxane derivative is represented by Formula (1). A silsesquioxane derivative to which alkaline metal atoms are bonded is represented by Formula (2). In Formula (1) and Formula (2), R is a group selected from alkyl, aryl and arylalkyl; Y is a group represented by Formula (a) or Formula (b); and M is a monovalent alkaline metal atom. X in Formula (a) and Formula (b) is hydrogen, halogen, a hydroxyl group or a monovalent organic group, and Z is —O—, —CH2— or a single bond. The preferred organic group is a functional group or a group having a functional group.

Abstract: The present inventors have obtained a PSQ derivative of a completely condensed type into which a functional group is readily introduced by using a novel PSQ derivative of an incompletely condensed type in which four alkaline metal atoms are bonded to silsesquioxane of a cage type having eight Si's. The above silsesquioxane derivative is represented by Formula (1). A silsesquioxane derivative to which alkaline metal atoms are bonded is represented by Formula (2). In Formula (1) and Formula (2), R is a group selected from alkyl, aryl and arylalkyl; Y is a group represented by Formula (a) or Formula (b); and M is a monovalent alkaline metal atom. X in Formula (a) and Formula (b) is hydrogen, halogen, a hydroxyl group or a monovalent organic group, and Z is —O—, —CH2— or a single bond. The preferred organic group is a functional group or a group having a functional group.

Abstract: The PSQ silsesquioxane derivative of the invention is represented by Formula (1), and it may be utilized as additives to ordinary organic polymers for improving the flame retardancy, heat resistance, weather resistance, light resistance, electric insulating property, surface property, hardness, mechanical strength and chemical resistance thereof. In Formula (1), R is hydrogen, alkyl, aryl or arylalkyl; at least one Y is a group represented by Formula (2) and the other Y is hydrogen; in Formula (2), R1 and R2 are a group independently defined similarly to R; and Z is preferably a functional group, or a group having a functional group.

Abstract: If chlorosilane is used in order to introduce a functional group into a silsesquioxane derivative having Si—OH, by-produced hydrogen chloride has to be treated. However, if alkoxysilane is substituted for chlorosilane, the long reaction time is required. A production process for a silsesquioxane derivative represented by Formula (2) characterized by using a compound represented by Formula (1), has been developed in order to solve such problems of conventional techniques.

Abstract: The present inventors have obtained a PSQ derivative of a completely condensed type into which a functional group is readily introduced by using a novel PSQ derivative of an incompletely condensed type in which four alkaline metal atoms are bonded to silsesquioxane of a cage type having eight Si's. The above silsesquioxane derivative is represented by Formula (1). A silsesquioxane derivative to which alkaline metal atoms are bonded is represented by Formula (2). In Formula (1) and Formula (2), R is a group selected from alkyl, aryl and arylalkyl; Y is a group represented by Formula (a) or Formula (b); and M is a monovalent alkaline metal atom. X in Formula (a) and Formula (b) is hydrogen, halogen, a hydroxyl group or a monovalent organic group, and Z is —O—, —CH2— or a single bond. The preferred organic group is a functional group or a group having a functional group.

Abstract: A conventional silsesquioxane derivative has the problems that the functional groups are restricted and the chemical structure is not readily controlled and that it is expensive. The present inventors have developed a process for producing a silsesquioxane derivative at a high yield by a simple process in order to solve such problems. The novel silsesquioxane derivative according to the present invention is controlled in a structure thereof and has a functional group, which is excellent in reactivity with a target compound, to be modified. The present invention relates to a production process for a silsesquioxane derivative represented by Formula (2), characterized by using a silicon compound represented by Formula (1).

Abstract: A propylene resin composition is constructed so as to contain (A) a propylene-&agr;-olefin random copolymer with the content of a propylene unit of 99.1 to 99.9% by weight, and (B) a propylene-&agr;-olefin random copolymer with the content of a propylene unit of 70 to 90% by weight, in the specified proportion, and to have the specified loss tangent (tan &dgr;) and storage elastic modulus (E′), in the temperature dependence of dynamic viscoelasticity. Thereby, the propylene resin composition is provided, suitable as a raw material for shaped article having a well-balanced combination of transparency, stress-whitening resistance; impact resistance at low temperatures, and further heat resistance.

Abstract: If chlorosilane is used in order to introduce a functional group into a silsesquioxane derivative having Si—OH, by-produced hydrogen chloride has to be treated. However, if alkoxysilane is substituted for chlorosilane, the long reaction time is required.

Abstract: A polypropylene composition comprising 0.001 to 10 parts by weight of a polyethylene having an intrinsic viscosity [&eegr;E] of 0.01 to less than 15 dl/g s measured in tetralin at 135° C. and 100 parts by weight of a polyolefin comprising at least polypropylene, wherein the polyethylene is finely dispersed as particles with a number average particle diameter of, e.g., 1 to 5000 nm in the polyolefin comprising at least polypropylene. By virtue of the above constitution, the polypropylene composition has excellent transparency and rigidity, is free from the creation of a sweeper roll flow mark in the preparation of a film and substantially free from a neck-in phenomenon of a film, and has high productivity.

Abstract: The present invention relates to a film using a polypropylene composition comprising crystalline polypropylene and a copolymer of propylene with &agr;-olefin in which a limiting viscosity of the said copolymer [&eegr;]RC is not more than 6.5 dl/g; the ratio of the limiting viscosity of the said polymer [&eegr;]RC to the limiting viscosity of the said crystalline polypropylene [&eegr;]PP is from 0.6 to 1.2; and the product i.e. ([&eegr;]RC/[&eegr;]PP)×(WPP/WRC), of the ratio of the limiting viscosity of the copolymer to the crystalline polypropylene with the ratio by weight of them is within a range of from 0.2 to 4.5 and also relates to a multi-layered film having at least one layer of the said film.

Abstract: A plastic molded product of olefin (co)polymer composition comprises 0.01-5.0 weight parts high molecular weight polyethylene with an intrinsic viscosity &eegr;E in the range of 15-100 dl/g measured in 135° C. tetralin and preferably 100 weight parts polypropylene. The high molecular weight polyethylene has an average particle size in the range of 1-5000 nm and is finely dispersed as fine granules in the polypropylene, so that high melt strength and high crystallization temperature are attained, enabling various molding methods to be performed with high speed productivity. Using the polymer composition, plastics such as a resin foam, a film, a sheet, a layered plastic article with a coated substrate surface, a hollow plastic article, an injection molded plastic article, a fiber, a nonwoven web or a continuous tube-shaped plastic are provided. The olefin (co)polymer composition is obtained by preparing high molecular weight polyethylene granules using e.g.

Abstract: Disclosed is a process for producing olefin polymers or copolymers which can freely regulates the molecular weight of the polymers or copolymers as well as novel olefin polymers or copolymers excellent in rigidity, heat-resisting property and transparency, moldings and compositions thereof which find a wide variety of applications in versatile industrial parts including containers, films, sheets, filaments or fibers, featured by (1) a process for producing olefin polymers or copolymers by the aid of a catalyst comprised predominantly of the compounds: (A) a transition metal compound of the formula: Q(C5H4−mR1m)(C5H4−nR2n)MXY, (B) an aluminoxane, (C) a fine particulate carrier, and (D) an organoaluminum compound; (2) olefin polymers or copolymers characterized by (a) a specific ratio of isotactic pentad, (b) 2,1- and 1.

Abstract: The present invention provides propylene/ethylene random copolymers characterized in that: an ethylene content (Ew) is 0.1-10 wt %, a relationship between an isolated ethylene content (E1) and the ethylene content (Ew) is represented by the following equation E1>0.85−0.01 Ew 2,1- and 1,3-propylene units present in a polymer chain are 0-1 mol %, a weight average molecular weight (Mw) is in the range of 40,000-1,000,000, and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to a number average molecular weight(Mn) is in the range of 1.5-3.8. The copolymers are suitable for a base resin for a molding material for the production of a wide variety of molded articles which are high in randomness and excellent in stiffness, heat resistance and transparency.

Abstract: A propylene block copolymer composition is disclosed which comprises (A) a propylene-&agr;-olefin random copolymer with a propylene content of 99.4 to 99.9 mol % and (B) a propylene-&agr;-olefin random copolymer with a propylene content of 35 to 60 mol %, &agr;-olefin contained in the random copolymer (A) being ethylene and/or 1-butene, wherein the intrinsic viscosity ([&eegr;B]) of the propylene-&agr;-olefin random copolymer (B) ranges from 0.5 to 2.0 dl/g, the ratio ([&eegr;B]/[&eegr;A]) of the intrinsic viscosity ([&eegr;B]) of the propylene-&agr;-olefin random copolymer (B) to the intrinsic viscosity ([&eegr;A]) of the propylene-&agr;-olefin random copolymer (A) ranges from 0.3 to 1.2 and the product (([&eegr;B]/[&eegr;A])×(WA/WB)) of the intrinsic viscosity ratio ([&eegr;B]/[&eegr;A]) and the weight ratio (WA/WB) of both copolymers ranges from 1.0 to 3.0.

Abstract: A polypropylene composition comprising 0.001 to 10 parts by weight of a polyethylene having an intrinsic viscosity [&eegr;E] of 0.01 to less than 15 dl/g s measured in tetralin at 135° C. and 100 parts by weight of a polyolefin comprising at least polypropylene, wherein the polyethylene is finely dispersed as particles with a number average particle diameter of, e.g., 1 to 5000 nm in the polyolefin comprising at least polypropylene. By virtue of the above constitution, the polypropylene composition has excellent transparency and rigidity, is free from the creation of a sweeper roll flow mark in the preparation of a film and substantially free from a neck-in phenomenon of a film, and has high productivity.

Abstract: A two-piece optical fiber connector comprises an internal member and an external member. The internal member includes a block having a hole which receives the end of an optical fiber cord and cantilevers provided along the side walls of the block having internal and external projections when no force is applied. The external member includes an opening through which the optical fiber cord is inserted and an opening or recess which engages with the external projections of the cantilevers when the block of the internal member is fit into the external member axially and slidably. Once the internal member and external member are fitted, the internal projections on the cantilevers securely hold the optical fiber cord in place.

Abstract: First and second ferrules of an optical fiber connector assembly are provided with angled apertures proximate their contacting ends. The angled apertures have a common axis when the two ferrules are assembled together, and the single optical fibers within the apertures are ground together with the ferrule end surfaces so that they are flush therewith. Feedback light resulting from end reflection is reflected outwardly of the cable, i.e. leaked, owing to the angularity of the fiber end surface with respect to the axis thereof.

Abstract: An optical fiber connector includes a cable with an optical fiber and a tube for containing the fiber. The fiber is able to move freely and axially within the tube, and is secured by a device having an internal diameter substantially the same as that of the optical fiber. This securing prevents the axial movement of the fiber held inside the tube. The securing device also has a cylindrical bore for receiving the cable fixed to the securing means.