摘要:
An ethylene/.alpha.-olefin copolymer obtained by copolymerizing ethylene with an .alpha.-olefin of 3 to 20 carbon atoms in the presence of a catalyst for olefin polymerization comprising an organoaluminum oxy-compound (a) and at least two kinds of transition metal compounds (b). This ethylene/.alpha.-olefin copolymer has high melt tension and high flowability. A graft modified ethylene/.alpha.-olefin copolymer obtained by graft polymerizing the above-mentioned ethylene/.alpha.-olefin copolymer with a polar monomer. An ethylene copolymer composition comprising the above-mentioned graft modified ethylene/.alpha.-olefin copolymer and polyolefin. The ethylene/.alpha.-olefin copolymer of the invention is excellent in moldability. From this copolymer, a film having high transparency and high mechanical strength can be produced. The graft modified ethylene/.alpha.-olefin copolymer of the invention is excellent in heat stability and moldability. From this copolymer, a film having high transparency and good adhesion to highly polar materials can be produced. The ethylene copolymer composition of the invention is excellent in heat stability and moldability. From this composition, a film having high transparency and good adhesion to highly polar materials can be produced.
摘要:
A graft-modified ethylene/.alpha.-olefin copolymer composition is prepared by graft copolymerizing an ethylene/.alpha.-olefin copolymer. The ethylene/.alpha.-olefin copolymer composition includes first and second ethylene/.alpha.-olefin copolymers. The copolymers are each prepared in the presence of a polymerization catalyst containing (a) an organoaluminum oxy compound and (b) for the first ethylene/.alpha.-olefin copolymer at least two kinds, and for the second ethylene/.alpha.-olefin copolymer one kind, of compounds of Group IV transition metals of the periodic table containing a ligand having a cyclopentadienyl skeleton. The ethylene/.alpha.-olefin copolymer composition may be blended with a polyolefin by mechanical or solution blending. The copolymer compositions have excellent moldability and heat stability properties and forms films having high transparency and mechanical strength.
摘要:
An ethylene/.alpha.-olefin copolymer composition containing a first and second ethylene/.alpha.-olefin copolymer is disclosed. The first ethylene/.alpha.-olefin copolymer is prepared in the prsence of a polymerization catalyst containing an organoaluminum oxy compound and at least two kinds of metallocene compounds (b) and the second ethylene/.alpha.-olefin copolymer, which differs from the first in at least one physical property, is prepared in the presence of a polymerization catalyst containing an organoaluminum oxy compound and a metallocene compound (b'). The ethylene/.alpha.-olefin copolymer composition has excellent moldability and heat stability properties and forms films having high transparency and mechanical strength.
摘要:
An ethylene/.alpha.-olefin copolymer obtained by copolymerizing ethylene with an .alpha.-olefin of 3 to 20 carbon atoms in the presence of a catalyst for olefin polymerization comprising an organoaluminum oxy-compound (a) and at least two kinds of transition metal compounds (b). This ethylene/.alpha.-olefin copolymer has high melt tension and high flowability.
摘要:
A graft modified ethylene/&agr;-olefin copolymer obtained by graft polymerizing an ethylene/&agr;-olefin of 3 to 20 carbon atoms copolymerizing with a polar monomer in the presence of a catalyst for olefin polymerization comprising an organoaluminum oxy-compound (a) and at least two kinds of transition metal compounds (b). This ethylene/&agr;-olefin copolymer has high melt tension and high flowability. An ethylene copolymer composition comprising the above-mentioned graft modified ethylene/&agr;-olefin copolymer and polyolefin. The graft modified ethylene/&agr;-olefin copolymer of the invention is excellent in heat stability and moldability. From this copolymer, a film having a high transparency and good adhesion to highly polar materials can be produced. The ethylene copolymer composition of the invention is excellent in heat stability and moldability. From this composition, a film having high transparency and good adhesion to highly polar materials can be produced.
摘要:
An ethylene/.alpha.-olefin copolymer composition including (I) a graft-modified ethylene/.alpha.-olefin copolymer composition and (II) a polyolefin. The graft-modified composition is prepared by graft copolymerizing an ethylene/.alpha.-olefin copolymer with a polar monomer. The ethylene/.alpha.-olefin copolymer composition includes first and second ethylene/.alpha.-olefin copolymers. The copolymers are each prepared in the presence of a polymerization catalyst containing (a) an organoaluminum oxy compound and (b) for the first ethylene/.alpha.-olefin copolymer at least two kinds, and for the second ethylene/.alpha.-olefin copolymer one kind, of compounds of Group IV transition metals of the periodic table containing a ligand having a cyclopentadienyl skeleton. The graft-modified ethylene/.alpha.-olefin copolymer composition is blended with a polyolefin, such as by mechanical or solution blending, at a weight ratio (I) to (II) of 1:99 to 99:1. The copolymer compositions have excellent moldability and heat stability properties and form films having high transparency and mechanical strength and good adhesion to polar materials.
摘要:
An ethylene copolymer composition comprising an ethylene/&agr;-olefin copolymer [A1] obtained by using a catalyst for olefin polymerization containing an organoaluminum oxy-compound (a) and at least two kinds of specific metallocene compounds (b), and one (co)polymer selected from the group consisting of [B1] a low-density polyethylene obtained by high-pressure radical polymerization, [B2] a crystalline polyolefin and [B3] an olefin type elastomer. An ethylene copolymer composition comprising an ethylene/&agr;-olefin copolymer [A2] having specific properties, and one (co)polymer selected from the group consisting of [B1] a low-density polyethylene obtained by high-pressure radical polymerization, [B2] a crystalline polyolefin and [B3] an olefin type elastomer.
摘要:
Ethylene/&agr;-olefin copolymer with olefin type elastomer, each having particular properties, including density and melt flow rate, with a density ratio of elastomer to copolymer of less than 1, provide compostions which have excellent moldability and form films having high mechanical strength.
摘要:
Disclosed is an ethylene copolymer composition having a density of 0.980 to 0.955 g/cm.sup.3 and a melt flow rate (MFR) of 0.1 to 100 g/10 min., which is formed from two kinds of ethylene/.alpha.-olefin copolymers having specific properties and having density and MFR different from each other. The ethylene copolymer composition of the invention is excellent in melt tension and flow index within the high-shear-region, and able to form films of high transparency, high mechanical strength and blocking resistance.
摘要翻译:公开了由具有特定性质的两种乙烯/α-烯烃共聚物形成的密度为0.980〜0.955g / cm 3,熔体流动速率(MFR)为0.1〜100g / 10分钟的乙烯共聚物组合物 并且具有彼此不同的密度和MFR。 本发明的乙烯共聚物组合物在高剪切区域内的熔体张力和流动指数优异,并且能够形成高透明度,高机械强度和抗粘连性的膜。
摘要:
An ethylene copolymer composition comprising an ethylene/α-olefin copolymer, A-4, of ethylene with an α-olefin of 3 to 20 carbon atoms in an amount of 65-98% by weight, whose melt tension, MT, at 190° C. and MFR satisfy the relation MT>2.2×MFR−0.84, and at least one crystalline polyolefin, B-2, in an amount of 1-40% by weight selected from the group consisting of, B-I, an ethylene homopolymer or a copolymer of ethylene with an α-olefin of 3 to 20 carbon atoms, prepared using a non-metallocene type catalyst, B-II, a propylene hompolymer or a copolymer of propylene with at least one olefin selected from ethylene and an α-olefin of 4 to 20 carbon atoms, and, B-III, a homopolymer of an α-olefin of 4 to 20 carbon atoms or a copolymer of α-olefins of 4 to 20 carbon atoms, and articles made from the composition.