Abstract: The object of the present invention is to provide a process for producing an ethylene-?-olefin-polyene copolymer by continuous multistage polymerization which can give an ethylene-?-olefin-polyene copolymer excellent in a form retention property during extrusion. The process for producing an ethylene-?-olefin-polyene copolymer comprises continuously polymerizing ethylene, ?-olefin, and the following polyene (A) and polyene (B) in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two tanks of polymerization reactors connected in series, wherein the polymerization is carried out under specific conditions: polyene (A): at least one polyene selected from norbornadienes and vinylnorbornenes, polyene (B): polyene other than the polyene (A).

Abstract: The object of the present invention is to provide a process for producing an ethylene-?-olefin copolymer by continuous multistage polymerization which can give an ethylene-?-olefin copolymer excellent in a form retention property during extrusion. The process for producing an ethylene-?-olefin copolymer comprises continuously polymerizing ethylene and ?-olefin in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two tanks of polymerization reactors connected in series, wherein the polymerization is carried out under the following polymerization conditions etc.: a ratio (?1/?2) of average residence time in the first tank (?1, unit: hr) to average residence time in the second tank (?2, unit: hr): from 1.2 to 10, and a value G of the following formula: from 0 to 0.

Abstract: The object of the present invention is to provide a process for producing an ethylene-?-olefin-polyene copolymer by continuous multistage polymerization which can give an ethylene-?-olefin-polyene copolymer excellent in a form retention property during extrusion. The process for producing an ethylene-?-olefin-polyene copolymer comprises continuously polymerizing ethylene, ?-olefin, and the following polyene (A) and polyene (B) in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two tanks of polymerization reactors connected in series, wherein the polymerization is carried out under specific conditions: polyene (A): at least one polyene selected from norbornadienes and vinylnorbornenes, polyene (B): polyene other than the polyene (A).

Abstract: The present invention relates to an olefin derived copolymer and a thermoplastic resin composition using the olefin derived copolymer satisfying the following (1) and (2): (1) tensile strength at break measured based on JIS K6251 is 2.0 or less MPa; and (2) tensile elongation at break EB (%) of a resin composition obtained satisfies the following relational expression (expression 1) and (expression 2), when blended with a polypropylene derived resin that has 20 degree C. xylene soluble component of not more than 20 wt %. R[3/5]?R[2/6]?0.15??(expression 1) S[2/6]??800??(expression 2) (R[3/5] and R[2/6] are obtained by the following methods: a curve is obtained by plotting tensile elongation at break EB (%) (based on JIS K6251) of resin composition taken as vertical axis, and weight part rate Pa of a content of an olefin derived copolymer contained in a resin composition taken as horizontal axis; a multiple regression curve in section regions of Pa=0.30-0.50 and Pa=0.20-0.

Abstract: There is provided an adhesive film comprising: (i) a substrate layer, which comprises a thermoplastic resin, and (ii) an adhesive layer, which comprises an olefin copolymer, wherein the olefin copolymer comprises polymerization units of at least two olefins selected from the group consisting of ethylene and &agr;-olefins having 3 to 20 carbon atoms, and the olefin copolymer satisfies the requirements: (a) the olefin copolymer has neither a peak of crystal melting calorie of not less than 1 J/g, nor a peak of crystallization calorie of not less than 1 J/g in a differential scanning calorimetry according to JIS K 7122, and (b) a molecular weight distribution of the olefin copolymer, Mw/Mn, is not more than 3.

Abstract: A thermoplastic elastomer composition comprising the following components (A) and (B), wherein a weight ratio of the component (A)/the component (B) is from 5/95 to 95/5:

Abstract: An olefin based copolymer composition having excellent weather resistance and excellent recycling properties having an olefin based copolymer obtained by copolymerizing two or more olefins, wherein the olefins are selected from the group consisting of ethylene, propylene and alpha olefins having 4 to 20 carbon atoms, and the total number of carbon atoms of the two or more selected olefins is 6 or more in combination with other component(s).

Abstract: There is provided an olefin polymer having an elastic recovery of from 70 to 100% defined by the following formula (1), Elastic recovery=stress-residual deformation recovery×100/stretch deformation  (1) wherein the stress-residual deformation recovery and the stretch deformation are obtained from a 100% strain hysteresis curve of a resin composition comprising 70 parts by weight of the olefin polymer and 30 parts by weight of one specific propylene-ethylene copolymer resin, provided that at least one resin composition satisfies the above-defined value of elastic recovery.

Abstract: There is disclosed a thermoplastic resin composition comprising; (A) 5 to 95% by weight of a thermoplastic resin having a melt flow rate of from 0.001 to 100 g/10 min. and a die swell ratio of not less than 1.7, and (B) 95 to 5% by weight of an olefin polymer satisfying the following formula (1), Ua≦1.5×Sa×(Ta/100)3.3  (1) wherein (i) Ua is a flexural modulus of a resin opposition for evaluation composed of 50 parts by weight of said olefin polymer and 50 parts by weight of a specific homopolypropylene resin, (ii) Sa is a flexural modulus of said homopolypropylene resin, and (iii) Ta is a containing ratio of said homopolypropylene resin in the resin composition for evaluation, provided that the sum of the component (A) and the component (B) is 100% by weight.

Abstract: There is provided an adhesive film comprising:

Abstract: A propylene copolymer comprising propylene, at least one olefin selected from the group consisting of olefins having 2 to 20 carbon atoms except propylene, and a cyclic olefin, wherein the total number of carbon atoms of the monomers except the cyclic olefin is at least 7. This copolymer is mixed with a thermoplastic resin such as polypropylene to provide a thermoplastic resin composition having excellent flexibility, transparency, resistance to whitening on bending, scratch resistance and heat resistance.

Abstract: There is provided an olefin polymer having an elastic recovery of from 70 to 100% defined by the following formula (1),

Abstract: An olefin-based copolymer composition comprising the following component (a) in combination with any one component selected from the following components (b) to (i):

Abstract: A pressure-sensitive adhesive comprising an olefin-based copolymer wherein (1) the olefin-based copolymer has a tensile strength at break measured according to JIS K 6251 of 2.0 MPa or less, and (2) the elongation at break EB(%) of a resin composition obtained in blending the olefin-based copolymer with a polypropylene-based resin having a 20° C. xylene-soluble component content of 20 wt % or less satisfies the following formula 1: S[2/6]≧−800, wherein S[2/6] represents the gradient of a primary straight line, and Pa represents the weight content proportion of the olefin-based copolymer contained in the resin composition.

Abstract: There is disclosed a thermoplastic resin composition comprising:

Abstract: A thermoplastic elastomer composition comprising (a) 100 wt. parts of a polyolefin resin, (b) 5 to 250 wt. parts of an ethylene-&agr;-olefin copolymer rubber in which the content of the &agr;-olefin units is at least 50 wt. %, and (c) 0 to 500 wt. parts of an ethylene-&agr;-olefin copolymer rubber in which the content of the &agr;-olefin units is less than 50 wt. %. This composition can provide a molded article which is hardly whitened when it is bent, and has good flexiblity.

Abstract: A propylene copolymer obtainable by polymerizing a propylene, at least one of .alpha.-olefin having 4-20 carbon atoms, and ethylene, in the presence of a catalyst for olefin polymerizaton including the following (A), (B) and/or (C):(A) at least one transition metal complex;(B) at least one aluminum compound; and(C) boron compound.

Abstract: A propylene-1-butene copolymer wherein a Shore A-scale hardness measured according to ASTM D2240 is not more than 70 and an intrinsic viscosity [.eta.] measured in axylene solvent at the temperature of 70.degree. C. is not less than 0.3 and which shows no crystalline melting peak and no crystallization peak in differential scanning calorimeter (DSC) mesurement.