An object of the present invention is to obtain a composition having, for example, improved anti-sagging properties, pigment dispersibility, and crack resistance, and the present invention relates to an ethylene/α-olefin copolymer composition including: an ethylene/α-olefin copolymer (A) satisfying requirements (a-1) to (a-3) described below; one or more selected from a color material (D), a resin (E) and an oil (F); and a solvent (C), (a-1) a methyl group index measured by .sup.1H-NMR is in a range of 40 to 60%, (a-2) a weight average molecular weight (Mw) determined by gel permeation chromatography (GPC) is in a range of 3,000 to 30,000, (a-3) no melting peak is observed at temperatures ranging from −100° C. to 150° C. in differential scanning calorimetry (DSC).

An object of the present invention is to obtain a composition having, for example, improved anti-sagging properties, pigment dispersibility, and crack resistance, and the present invention relates to an ethylene/α-olefin copolymer composition including: an ethylene/α-olefin copolymer (A) satisfying requirements (a-1) to (a-3) described below; one or more selected from a color material (D), a resin (E) and an oil (F); and a solvent (C), (a-1) a methyl group index measured by .sup.1H-NMR is in a range of 40 to 60%, (a-2) a weight average molecular weight (Mw) determined by gel permeation chromatography (GPC) is in a range of 3,000 to 30,000, (a-3) no melting peak is observed at temperatures ranging from −100° C. to 150° C. in differential scanning calorimetry (DSC).

Provided are an ethylene-propylene-diene monomer (EPDM) copolymer and a method of preparing the same. An EPDM copolymer which has more improved miscibility with inorganic fillers such as carbon black, may further facilitate dispersibility in mixing to further decrease the viscosity of a compound composition, and may provide a compound composition having excellent processability and mechanical properties. A method of preparing the same is also provided.

Provided are an ethylene-propylene-diene monomer (EPDM) copolymer and a method of preparing the same. An EPDM copolymer which has more improved miscibility with inorganic fillers such as carbon black, may further facilitate dispersibility in mixing to further decrease the viscosity of a compound composition, and may provide a compound composition having excellent processability and mechanical properties. A method of preparing the same is also provided.

Provided are an ethylene-propylene-diene monomer (EPDM) copolymer and a method of preparing the same. An EPDM copolymer which has more improved miscibility with inorganic fillers such as carbon black, may further facilitate dispersibility in mixing to further decrease the viscosity of a compound composition, and may provide a compound composition having excellent processability and mechanical properties. A method of preparing the same is also provided.

A method can be used for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell. A polymerization step includes subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor. A separation step includes recovering residual catalysts and unreacted monomers from the stream discharged from the reactor. An acquisition step includes recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

A method can be used for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell. A polymerization step includes subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor. A separation step includes recovering residual catalysts and unreacted monomers from the stream discharged from the reactor. An acquisition step includes recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

One aspect of the invention includes a glass powder for a chemical polymerization initiator, the glass powder including aluminum, silicon, and at least one of copper or vanadium.

One aspect of the invention includes a glass powder for a chemical polymerization initiator, the glass powder including aluminum, silicon, and at least one of copper or vanadium.

An oxo-nitrogenated vanadium complex having the general formula (I): in which: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7, mutually identical or different, represent a hydrogen atom; or are selected from optionally halogenated, linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X.sub.1 and X.sub.2, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or are selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.15, alkyl groups, —OCOR.sub.8 groups or —OR.sub.8 groups in which R.sub.8 is selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.15, alkyl groups; Y is selected from ethers such as, for example, diethyl ether, tetrahydrofuran (THF), dimethoxyethane, preferably is tetrahydrofuran (THF); n is 0 or 1. Said oxo-nitrogenated vanadium complex having the general formula (I) may advantageously be used in a catalytic system for (co)polymerising conjugated dienes.