The present invention relates to a photopolymerization method for preparing a block polymer with a main-chain “semi-fluorinated” alternating copolymer, which comprises the following steps: under a protective atmosphere, subjecting a methacrylate monomer and a “semi-fluorinated” alternating copolymer (AB).sub.n macroinitiator to light-controlled living radical polymerization in an organic solvent at 20-30° C. in the presence of a photocatalyst, where the polymerization reaction is continued for at least half an hour under irradiation of light at 390-590 nm, to obtain a block copolymer of a main-chain polyolefin, polyester, or polyether “semi-fluorinated” alternating copolymer. The polymerization method is carried out under irradiation of visible light, the polymerization process has the characteristics of “living” radical polymerization, and the molecular weight distribution of the prepared polymer is narrow.

Sulfur chelated ruthenium compounds represented by the following formula: ##STR00001##
wherein M indicates the ruthenium metal bound to a benzylidene carbon; R represents C.sub.1-C.sub.7 alkyl group or optionally substituted aryl; X.sub.1 and X.sub.2 each independently represent halogen; Y.sub.1 and Y.sub.2 each independently denote unsubstituted or alkyl-substituted phenyl; and Z independently represents hydrogen, electron withdrawing or electron donating substituent, with m being an integer from 1 to 4, and processes and compositions related thereto.

Sulfur chelated ruthenium compounds represented by the following formula: ##STR00001##
wherein M indicates the ruthenium metal bound to a benzylidene carbon; R represents C.sub.1-C.sub.7 alkyl group or optionally substituted aryl; X.sub.1 and X.sub.2 each independently represent halogen; Y.sub.1 and Y.sub.2 each independently denote unsubstituted or alkyl-substituted phenyl; and Z independently represents hydrogen, electron withdrawing or electron donating substituent, with m being an integer from 1 to 4, and processes and compositions related thereto.

The present invention relates to a method for producing a copolymer of ethylene and an allyl monomer that is represented by formula (1) and has a polar group, or a copolymer of ethylene, the allyl monomer that is represented by formula (1) and has a polar group, and another monomer. This production method is characterized by using a metal complex, which is represented by general formula (C1), as a polymerization catalyst and by having a silane compound, which is represented by general formula (2) and has a silicon-hydrogen bond, coexist with the metal complex. (In the formulae, the symbols are as defined in the description.) According to the present invention, a copolymer of an allyl monomer that has a polar group is able to be produced with high catalytic activity, said copolymer being capable of having various applications. ##STR00001##

The present invention relates to a method for producing a copolymer of ethylene and an allyl monomer that is represented by formula (1) and has a polar group, or a copolymer of ethylene, the allyl monomer that is represented by formula (1) and has a polar group, and another monomer. This production method is characterized by using a metal complex, which is represented by general formula (C1), as a polymerization catalyst and by having a silane compound, which is represented by general formula (2) and has a silicon-hydrogen bond, coexist with the metal complex. (In the formulae, the symbols are as defined in the description.) According to the present invention, a copolymer of an allyl monomer that has a polar group is able to be produced with high catalytic activity, said copolymer being capable of having various applications. ##STR00001##

The present invention relates to a process for preparing solutions of hydrogenated nitrile-diene copolymer, wherein the nitrile-diene copolymer dissolved in an ether-containing or ketone-containing solvent mixture is subjected to hydrogenation conditions. The invention further relates to solutions of hydrogenated nitrile-diene copolymer (HNBR solutions) comprising CPME as solvent, and to the use of HNBR solutions in CPME-containing solvent mixtures as binder in electrodes.

The present invention relates to a process for preparing solutions of hydrogenated nitrile-diene copolymer, wherein the nitrile-diene copolymer dissolved in an ether-containing or ketone-containing solvent mixture is subjected to hydrogenation conditions. The invention further relates to solutions of hydrogenated nitrile-diene copolymer (HNBR solutions) comprising CPME as solvent, and to the use of HNBR solutions in CPME-containing solvent mixtures as binder in electrodes.

The present invention relates to a fluorine-containing alternating copolymer macromonomer and a synthesis method thereof. The synthesis method comprises steps of: subjecting a fluorine-containing alternating copolymer to a reduction reaction at 60-100° C. in an organic solvent in the presence of a reducing agent and a first catalyst to obtain a reduction product; in the presence of a second catalyst, reacting the reduction product with a mercapto-monohydric alcohol in an organic solvent at 60-100° C., to obtain a hydroxyl-terminated fluorine-containing alternating copolymer; and in the presence of a third catalyst, reacting the hydroxyl-terminated fluorine-containing alternating copolymer with an acrylic monomer or acryloyl chloride monomer at 0-30° C., to obtain the fluorine-containing alternating copolymer macromonomer. In the present invention, a fluorine-containing alternating copolymer macromonomer is initially synthesized from a fluorine-containing alternating copolymer through polymer modification.

Disclosed herein is a method for reducing isomerization during the copolymerization of ethylene with an α-olefin comprising adding to a reactor a reaction mixture comprising hydrogen, ethylene, an α-olefin, a solvent and a catalyst; where the catalyst does not include a chain shuttling agent that comprises dialkyl zinc; heating the reactor to a first temperature to react the ethylene with the α-olefin to form a copolymer; discharging from the reactor a first product stream to a heat exchanger; where the product stream comprises the copolymer; adding to the product stream prior to the heat exchanger a first additive that is operative to reduce isomerization of the α-olefin; and discharging from the heat exchanger a second product stream.

Disclosed herein is a method for reducing isomerization during the copolymerization of ethylene with an α-olefin comprising adding to a reactor a reaction mixture comprising hydrogen, ethylene, an α-olefin, a solvent and a catalyst; where the catalyst does not include a chain shuttling agent that comprises dialkyl zinc; heating the reactor to a first temperature to react the ethylene with the α-olefin to form a copolymer; discharging from the reactor a first product stream to a heat exchanger; where the product stream comprises the copolymer; adding to the product stream prior to the heat exchanger a first additive that is operative to reduce isomerization of the α-olefin; and discharging from the heat exchanger a second product stream.