A diimine metal complex represented by Formula I, a preparation method therefor, and application thereof are provided. The complex is used as a main catalyst in catalysts for olefin polymerization, and can achieve catalytic ethylene polymerization at a high temperature to prepare high molecular weight branched polyethylene.

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A diimine metal complex represented by Formula I, a preparation method therefor, and application thereof are provided. The complex is used as a main catalyst in catalysts for olefin polymerization, and can achieve catalytic ethylene polymerization at a high temperature to prepare high molecular weight branched polyethylene.

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Tracers for oil recovery, particularly fluorescent nanotracers conservative in aqueous phases. The tracer comprises a core-shell nanoparticle tailored according to the operation to be traced. It contains a fluorescent core that allows the detection thereof in the field and a functionalized polymeric shell that provides increased stability in high salinity aqueous phases. A method for preparing said nanotracer. Given the nanotracer versatility, it can be used both for tracing fracking steps as well as meshes of secondary and tertiary recovery.

Disclosed is a new polyolefin catalyst and preparation therefor. Specifically, disclosed is a catalytic system comprising a new complex of iron, cobalt, nickel, palladium, and platinum. In the presence of the catalytic system, oily polyethylene can be efficiently obtained from simple olefins such as ethylene under mild conditions, highly branched oily alkane mixture is then obtained after hydrogenation. The alkane mixture can be used as a processing aid and a high-performance lubricant base oil. The present invention also provides a method for preparing the catalyst, a method for preparing the highly branched oily alkane mixture and a method for preparing functional polyolefin oil.

Disclosed is a new polyolefin catalyst and preparation therefor. Specifically, disclosed is a catalytic system comprising a new complex of iron, cobalt, nickel, palladium, and platinum. In the presence of the catalytic system, oily polyethylene can be efficiently obtained from simple olefins such as ethylene under mild conditions, highly branched oily alkane mixture is then obtained after hydrogenation. The alkane mixture can be used as a processing aid and a high-performance lubricant base oil. The present invention also provides a method for preparing the catalyst, a method for preparing the highly branched oily alkane mixture and a method for preparing functional polyolefin oil.

Process for the preparation of syndiotactic 1,2-polybutadiene comprising polymerising 1,3-butadiene in the presence of a catalytic system comprising: at least one pyridyl iron complex having the general formula (I), in which: R.sub.1 represents a hydrogen atom; or a methyl group; R.sub.2 represents a hydrogen atom; or is selected from linear or branched C.sub.1-C.sub.10 alkyl groups; X, identical or different to one another, represent a halogen atom; or are selected from linear or branched, C.sub.1-C.sub.20 alkyl groups, OCOR.sub.3 groups or OR.sub.3 groups in which R.sub.3 is selected from linear or branched C.sub.1-C.sub.20 alkyl groups; n is 2 or 3; at least one aluminoxane having the general formula (II), (R.sub.4).sub.2-AI-O-[-AI(R.sub.5)O-].sub.m-AI-(R.sub.6).sub.2 (ll) in which R.sub.4, R.sub.5 and R.sub.6, identical or different to one another, represent a hydrogen atom, or a halogen atom; or are selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyi groups, aryl groups, said groups being optionally substituted with one or more silicon atoms or germanium; and m is an integer ranging from 0 to 1000; in which the molar ratio between the aluminium present in the aluminoxane having the general formula (II) and the iron present in the pyridyl iron complex having the general formula (I) is ranging from 5 to 20. ##STR00001##

Process for the preparation of syndiotactic 1,2-polybutadiene comprising polymerising 1,3-butadiene in the presence of a catalytic system comprising: at least one pyridyl iron complex having the general formula (I), in which: R.sub.1 represents a hydrogen atom; or a methyl group; R.sub.2 represents a hydrogen atom; or is selected from linear or branched C.sub.1-C.sub.10 alkyl groups; X, identical or different to one another, represent a halogen atom; or are selected from linear or branched, C.sub.1-C.sub.20 alkyl groups, OCOR.sub.3 groups or OR.sub.3 groups in which R.sub.3 is selected from linear or branched C.sub.1-C.sub.20 alkyl groups; n is 2 or 3; at least one aluminoxane having the general formula (II), (R.sub.4).sub.2-AI-O-[-AI(R.sub.5)O-].sub.m-AI-(R.sub.6).sub.2 (ll) in which R.sub.4, R.sub.5 and R.sub.6, identical or different to one another, represent a hydrogen atom, or a halogen atom; or are selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyi groups, aryl groups, said groups being optionally substituted with one or more silicon atoms or germanium; and m is an integer ranging from 0 to 1000; in which the molar ratio between the aluminium present in the aluminoxane having the general formula (II) and the iron present in the pyridyl iron complex having the general formula (I) is ranging from 5 to 20. ##STR00001##

Process for the preparation of polyisoprene with a mainly alternating cis-1,4-alt-3,4 structure comprising polymerizing isoprene in the presence of a catalytic system comprising: (a) at least one pyridyl iron complex having general formula (I):

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wherein: R.sub.1 is selected from 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; R.sub.2 is selected from linear or branched C.sub.1-C.sub.10, preferably C.sub.1-C.sub.3, alkyl groups; X, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.15, alkyl groups, OCOR.sub.3 groups or OR.sub.3 groups wherein R.sub.3 is selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.15, alkyl groups. n is 2 or 3; (b) at least one co-catalyst selected from organo-derivative compounds of aluminum, preferably from (b.sub.1) aluminoxanes having general formula (II):

(R.sub.4).sub.2AlO[Al(R.sub.5)O].sub.mAl(R.sub.6).sub.2(II) wherein R.sub.4, R.sub.5 and R.sub.6, mutually identical or different, represent a hydrogen atom, or a halogen atom such as, for example, chlorine, bromine, iodine, fluorine; or they are selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyl groups, aryl groups, said groups being optionally substituted with one or more silicon or germanium atoms; and m is an integer ranging from 0 to 1000; (b.sub.2) aluminum compounds having general formula (III):

Al(R.sub.7)(R.sub.8)(R.sub.9)(III) wherein R.sub.7 is a hydrogen atom, or is selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups, alkoxy groups; R.sub.8 and R.sub.9, mutually identical or different, are selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups;
wherein the molar ratio between the aluminum present in the co-catalyst and the iron present in the iron pyridyl complex having general formula (I) is ranging from 5 to 60, preferably from 8 to 55.

Process for the preparation of polyisoprene with a mainly alternating cis-1,4-alt-3,4 structure comprising polymerizing isoprene in the presence of a catalytic system comprising: (a) at least one pyridyl iron complex having general formula (I):

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wherein: R.sub.1 is selected from 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; R.sub.2 is selected from linear or branched C.sub.1-C.sub.10, preferably C.sub.1-C.sub.3, alkyl groups; X, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.15, alkyl groups, OCOR.sub.3 groups or OR.sub.3 groups wherein R.sub.3 is selected from linear or branched C.sub.1-C.sub.20, preferably C.sub.1-C.sub.15, alkyl groups. n is 2 or 3; (b) at least one co-catalyst selected from organo-derivative compounds of aluminum, preferably from (b.sub.1) aluminoxanes having general formula (II):

(R.sub.4).sub.2AlO[Al(R.sub.5)O].sub.mAl(R.sub.6).sub.2(II) wherein R.sub.4, R.sub.5 and R.sub.6, mutually identical or different, represent a hydrogen atom, or a halogen atom such as, for example, chlorine, bromine, iodine, fluorine; or they are selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyl groups, aryl groups, said groups being optionally substituted with one or more silicon or germanium atoms; and m is an integer ranging from 0 to 1000; (b.sub.2) aluminum compounds having general formula (III):

Al(R.sub.7)(R.sub.8)(R.sub.9)(III) wherein R.sub.7 is a hydrogen atom, or is selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups, alkoxy groups; R.sub.8 and R.sub.9, mutually identical or different, are selected from linear or branched C.sub.1-C.sub.20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups;
wherein the molar ratio between the aluminum present in the co-catalyst and the iron present in the iron pyridyl complex having general formula (I) is ranging from 5 to 60, preferably from 8 to 55.

To provide a catalyst composition having high polymerization activity. To provide a polymer manufacturing method. To provide a polymer manufactured by the polymer manufacturing method. To provide a rubber composition including the polymer. To provide a tire using the rubber composition. A catalyst composition including a compound represented by Structural Formula I below, wherein the compound has an OH group at at least one position of the bipyridyl ring; M is a transition metal, a lanthanoid, scandium, or yttrium; R.sup.1 and R.sup.2 are a hydrocarbon group having one or more carbon atoms or a halogen atom; and R.sup.1 and R.sup.2 may be the same or different from each other. A polymer manufacturing method including a step of polymerizing one or more selected from the group consisting of a conjugated diene compound and a compound having an ethylenically unsaturated double bond in the presence of the catalyst composition. A polymer manufactured by the manufacturing method. A rubber composition including the polymer. A tire using the rubber composition.

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