Abstract: A copolymer of a strait chain ?-olefin and a vinyl compound (I) represented by the general formula CH2?CH—R, wherein R is a hydrocarbon group, the steric parameter Es of the substituent R is ?1.64 or less and the steric parameter B1 of the substituent R is 1.53 or more, an adhesive containing the same as an effective ingredient, and an laminate containing the adhesive.

Abstract: A process for producing an olefin-based copolymer, which comprises copolymerizing at least one olefin selected from the group consisting of ethylene and straight chain ?-olefins, and a vinyl compound (I) and a polyene (II) described below: Vinyl compound (I); a vinyl compound represented by the general formula CH2?CH—R, wherein the substituent R is a saturated hydrocarbon group and steric parameters Es and B1 of the substituent R are respectively ?1.64 or less and 1.53 or more; and Polyene (II); a compound having two or more of ethylene bonds and at least one combination of two ethylene bonds in which those are bonded to each other through at least three carbon atoms.

Abstract: A modified aluminum oxy compound (A) obtained by reacting an aluminum oxy compound (a), water (b) and a compound having a hydroxyl group (c); a polymerization catalyst component comprising the modified aluminum oxy compound; a polymerization catalyst obtained by contacting said modified aluminum oxy compound (A), a transition metal compound (B) and optionally an organoaluminum compound (C) and a specified boron compound; and a process for producing an olefin polymer or an alkenyl aromatic hydrocarbon polymer with the polymerization catalyst.

Abstract: A copolymer of a strait chain ?-olefin and a vinyl compound (I) represented by the general formula CH2?CH—R, wherein R is a hydrocarbon group, the steric parameter Es of the substituent R is ?1.64 or less and the steric parameter B1 of the substituent R is 1.53 or more, an adhesive containing the same as an effective ingredient, and an laminate containing the adhesive.

Abstract: A modified olefin-based copolymer produced by graft-polymerizing an alkenyl aromatic hydrocarbon and/or an unsaturated carboxylic acid or derivative thereof to an olefin-based copolymer containing repeating units derived from a linear ?-olefin and/or ethylene copolymer of ethylene and repeating units derived from a vinyl compound (I) or (II) described below, and an adhesive containing the product as an effective ingredient, in which an adhesiveness to an adherend such as olefin resins (e.g. polyethylene, polypropylene) is further improved, are provided. Vinyl compound (I): a vinyl compound represented by the general formula CH2?CH—R, wherein steric parameters Es and B1 of the substituent R are respectively ?1.64 or less and 1.53 or more. Vinyl compound (II): a vinyl compound represented by the general formula CH2?CH—R?, wherein a substituent R? is a secondary or tertiary alkyl group.

Abstract: A copolymer of a strait chain a -olefin and a vinyl compound (I) represented by the general formula CH2?CH—R, wherein R is a hydrocarbon group, the steric parameter Es of the substituent R is ?1.64 or less and the steric parameter B1 of the substituent R is 1.53 or more, an adhesive containing the same as an effective ingredient, and an laminate containing the adhesive.

Abstract: A thermoplastic elastomer composition characterized in that the composition comprises a resin component and at least two kinds of rubber components, wherein at least one kind of the rubber components makes a continuous phase and/or a network-like phase, and the remaining at least one kind of the rubber components makes an isolated phase; and a process for producing the same.

Abstract: A copolymer of ethylene and a vinyl compound (I) represented by the general formula CH2?CH—R, wherein R is a saturated hydrocarbon group, a steric parameter Es of the substituent R is from ?2.77 to ?1.64 and a steric parameter B1 of the substituent R is from 1.53 to 2.90, a molded article comprising the same, an adhesive comprising the same as an effective ingredient an laminate comprising the same.

Abstract: A modified aluminum oxy compound (A) obtained by reacting an aluminum oxy compound (a), water (b) and a compound having a hydroxyl group (c); a polymerization catalyst component comprising the modified aluminum oxy compound; a polymerization catalyst obtained by contacting said modified aluminum oxy compound (A), a transition metal compound (B) and optionally an organoaluminum compound (C) and a specified boron compound; and a process for producing an olefin polymer or an alkenyl aromatic hydrocarbon polymer with the polymerization catalyst.

Abstract: A modified aluminum oxy compound (A) obtained by reacting an aluminum oxy compound (a), water (b) and a compound having a hydroxyl group (c); a polymerization catalyst component comprising the modified aluminum oxy compound; a polymerization catalyst obtained by contacting said modified aluminum oxy compound (A), a transition metal compound (B) and optionally an organoaluminum compound (C) and a specified boron compound; and a process for producing an olefin polymer or an alkenyl aromatic hydrocarbon polymer with the polymerization catalyst.

Abstract: An optical member comprising a polymer which is amorphous and has a glass transition temperature of not lower than 110° C. and optical property parameters O?R(?)) and O?G(?) that satisfy the following inequality (1), |O?G(?)|<?0.75×|O?R(?)|+0.017??(1), is superior in its heat resistance and transparency and high in its stability of optical properties. Therefore, the optical member can be used as, for example, a constituent of optical systems in a liquid crystal display, thereby suppressing change in a display color tone depending on variation of using circumstances of the liquid crystal display.

Abstract: A thermoplastic elastomer composition characterized in that the composition comprises a resin component and at least two kinds of rubber components, wherein at least one kind of the rubber components makes a continuous phase and/or a network-like phase, and the remaining at least one kind of the rubber components makes an isolated phase; and a process for producing the same.

Abstract: A modified aluminum oxy compound (A) obtained by reacting an aluminum oxy compound (a), water (b) and a compound having a hydroxyl group (c); a polymerization catalyst component comprising the modified aluminum oxy compound; a polymerization catalyst obtained by contacting said modified aluminum oxy compound (A), a transition metal compound (B) and optionally an organoaluminum compound (C) and a specified boron compound; and a process for producing an olefin polymer or an alkenyl aromatic hydrocarbon polymer with the polymerization catalyst.

Abstract: A modified olefin-based copolymer produced by graft-polymerizing an alkenyl aromatic hydrocarbon and/or an unsaturated carboxylic acid or derivative thereof to an olefin-based copolymer containing repeating units derived from a linear &agr;-olefin and/or ethylene copolymer of ethylene and repeating units derived from a vinyl compound (I) or (II) described below, and an adhesive containing the product as an effective ingredient, in which an adhesiveness to an adherend such as olefin resins (e.g. polyethylene, polypropylene) is further improved, are provided.

Abstract: A process for producing a polymer, which comprises polymerizing a vinyl compound (I) represented by the general formula CH2═CH—R, wherein steric parameters Es and B1 of the substituent R are respectively −1.64 or less and 1.53 or more, or a vinyl compound (II) represented by the general formula CH2═CH—R′, wherein a substituent R′ is a secondary or tertiary alkyl group, in the presence of a catalyst obtained by combining: (A) a transition metal compound represented by the general formula [1] (B) an organoaluminum compound and (C) a boron compound.

Abstract: The present invention provides a phase retarder made of a copolymer prepared by polymerizing one non-cyclic olefin monomer (A) selected from ethylene and &agr;-olefin compound having 3 to 20 carbon atoms, one cyclic olefin monomer (B) selected from cyclic olefin compound such as norbornene, and one cyclic vinyl monomer (C) selected from vinyl compound having a cyclic unit made of an aromatic hydrocarbon or an alicyclic hydrocarbon such as styrene or vinylcyclohexane; wherein (1) an amount of the aromatic vinyl monomer is from about 1 to about 20 mol % and a total amount of the non-cyclic olefin monomer (A) and the cyclic olefin monomer (B) is from about 80 to about 99 mol % in case the component (C) is the aromatic vinyl monomer, or (2) an amount of the alicyclic vinyl monomer is from about 80 to about 99 mol % and a total amount of the non-cyclic olefin monomer and the cyclic olefin monomer is from about 1 to about 20 mol % in case the component (C) is the alicyclic vinyl monomer.

Abstract: A modified aluminum oxy compound(A) obtained by reacting an aluminum oxy compound(a), water (b) and a compound having a hydroxyl group(c); a polymerization catalyst component comprising the modified aluminum oxy compound; a polymerization catalyst obtained by contacting said modified aluminum oxy compound(A), a transition metal compound(B) and optionally an organoaluminum compound(C) and a specified boron compound; and a process for producing an olefin polymer or an alkenyl aromatic hydrocarbon polymer with the polymerization catalyst.

Abstract: The present invention provides a covering material having a layer formed of a resin of which glass transition point is in the range of 10° C. to 50° C., said covering material having excellent shape keeping ability and shape recovering ability after deformation.

Abstract: An optical member comprising a polymer which is amorphous and has a glass transition temperature of not lower than 110° C.

Abstract: Disclosed is a resin sheet having a resin layer comprising a copolymer of ethylene and/or &agr;-olefin and a vinyl compound (I) defined below or a vinyl compound (II) defined below: