A production method for a cyclic olefin copolymer, which is capable of efficiently producing a cyclic olefin copolymer by copolymerizing monomers including a norbornene monomer and ethylene while suppressing the formation of a polyethylene-like impurity and an excessive increase in molecular weight. In the polymerization of monomers including a norbornene monomer and ethylene in the presence of a metallocene catalyst, the metallocene catalyst having a ligand including a cyclopentadiene ring and a structure in which a heteroatom being N, O, S or P is bonded to a transition metal of Group IV of the periodic table and an sp2 carbon, and an alkylmetal compound are used in combination.

A production method for a cyclic olefin copolymer, which is capable of efficiently producing a cyclic olefin copolymer by copolymerizing monomers including a norbornene monomer and ethylene while suppressing the formation of a polyethylene-like impurity and an excessive increase in molecular weight. In the polymerization of monomers including a norbornene monomer and ethylene in the presence of a metallocene catalyst, the metallocene catalyst having a ligand including a cyclopentadiene ring and a structure in which a heteroatom being N, O, S or P is bonded to a transition metal of Group IV of the periodic table and an sp2 carbon, and an alkylmetal compound are used in combination.

Provided is a method for producing a hydrogenated petroleum resin having good compatibility with a base polymer and a good hue under a hydrogen pressure of 4 MPaG or less. A method for producing a hydrogenated petroleum resin, includes a hydrogenation step of hydrogenating a polymerization product of dicyclopentadiene and a vinyl aromatic compound in the presence of a catalyst, in which hydrogenation step is performed under conditions (A) to (C): (A) an amount of the catalyst used: 0.125 to 0.4 parts by mass relative to 100 parts by mass of a resin in the polymerization product, (V) a reaction pressure: 4 MPaG or less, and (C) a reaction temperature: 240° C. or higher.

A production method for a cyclic olefin copolymer which is capable of efficiently producing a cyclic olefin copolymer by copolymerizing monomers including a norbornene monomer and ethylene while suppressing the formation of a polyethylene-like impurity, and a catalyst composition for the copolymerization of a norbornene monomer and ethylene. Monomers including a norbornene monomer and ethylene are polymerized in the presence of a metal-containing catalyst, and the metal-containing catalyst has a structure in which a nitrogen atom is bonded to a transition metal of Group 4 of the periodic table and an atom of Group 15 of the periodic table.

The present invention relates to a preparation method of a BOPP film stiffening agent, including: taking cyclopentadiene or a derivative thereof and a norbornene monomer or C8 cycloolefin as a polymerization raw material, obtaining a polymerization resin liquid by continuous high-temperature polymerization, then preparing high-softening-point aliphatic hydrogenation petroleum resin through two-stage catalytic hydrogenation reaction and removing low-boiling-point light components and solvents; and then obtaining the BOPP film stiffening agent by mixing and extruding with homo-polypropylene. The stiffening agent prepared by the present invention has a very good anti-dissolution performance and environmental protection performance which is suitable for modification of a BOPP cigarette film, and has good market application prospects.

The present invention relates to a preparation method of a BOPP film stiffening agent, including: taking cyclopentadiene or a derivative thereof and a norbornene monomer or C8 cycloolefin as a polymerization raw material, obtaining a polymerization resin liquid by continuous high-temperature polymerization, then preparing high-softening-point aliphatic hydrogenation petroleum resin through two-stage catalytic hydrogenation reaction and removing low-boiling-point light components and solvents; and then obtaining the BOPP film stiffening agent by mixing and extruding with homo-polypropylene. The stiffening agent prepared by the present invention has a very good anti-dissolution performance and environmental protection performance which is suitable for modification of a BOPP cigarette film, and has good market application prospects.

Described herein are hydrocarbon polymer modifiers for use in various applications. The hydrocarbon polymer modifier comprises a cyclic component, and has a glass transition temperature and Mn defined by the following two equations: (1) Tg≥95-2.2*(% H Ar); and (2) Tg≥125−(0.08*Mn) and an aromaticity content of less than or equal to 6 mole %, wherein Tg is glass transition temperature as expressed in ° C. of the modifier, the % H Ar represents the content of aromatic protons in the hydrocarbon polymer modifier, and Mn represents the number average molecular weight of the hydrocarbon polymer modifier, and the cyclic component is selected from the group of a distillation cut from a petroleum refinery stream, and/or C.sub.4 C.sub.5 or C.sub.6 cyclic olefins and mixtures thereof, and wherein the hydrocarbon polymer modifier has number average molecular weight (Mn) of between 150 and 800 g/mol. The hydrocarbon modifiers are particularly useful in high Tg applications where compatibility with the polymer systems and/or ease of manufacturing are desirable.

Described herein are hydrocarbon polymer modifiers for use in various applications. The hydrocarbon polymer modifier comprises a cyclic component, and has a glass transition temperature and Mn defined by the following two equations: (1) Tg≥95-2.2*(% H Ar); and (2) Tg≥125−(0.08*Mn) and an aromaticity content of less than or equal to 6 mole %, wherein Tg is glass transition temperature as expressed in ° C. of the modifier, the % H Ar represents the content of aromatic protons in the hydrocarbon polymer modifier, and Mn represents the number average molecular weight of the hydrocarbon polymer modifier, and the cyclic component is selected from the group of a distillation cut from a petroleum refinery stream, and/or C.sub.4 C.sub.5 or C.sub.6 cyclic olefins and mixtures thereof, and wherein the hydrocarbon polymer modifier has number average molecular weight (Mn) of between 150 and 800 g/mol. The hydrocarbon modifiers are particularly useful in high Tg applications where compatibility with the polymer systems and/or ease of manufacturing are desirable.

The disclosure relates to methods for producing poly(cyclohexadiene) homopolymers (PCHD). The PCHD is formed by polymerizing a 1,3-cyclohexadiene monomer in the presence of a catalyst, in a hydrocarbon solvent, and at a temperature of −100° C. to 120° C. The catalyst is selected from the group consisting of a Bronsted acid, a Lewis acid, and combinations thereof. PCHD produced under these conditions has good solubility in non-polar solvents, and a number average molecular weight of 300 to 5,000 Dalton; a weight average molecular weight of 5,000 to 15,000 Delton; and a polydispersity index of 3.0 to 8.0. The PCHD is useful for producing crosslinked materials having good physical properties. The crosslinked materials can be combined with a rubbery polymer to produce compositions valuable for further downstream uses.

The disclosure relates to methods for producing poly(cyclohexadiene) homopolymers (PCHD). The PCHD is formed by polymerizing a 1,3-cyclohexadiene monomer in the presence of a catalyst, in a hydrocarbon solvent, and at a temperature of −100° C. to 120° C. The catalyst is selected from the group consisting of a Bronsted acid, a Lewis acid, and combinations thereof. PCHD produced under these conditions has good solubility in non-polar solvents, and a number average molecular weight of 300 to 5,000 Dalton; a weight average molecular weight of 5,000 to 15,000 Delton; and a polydispersity index of 3.0 to 8.0. The PCHD is useful for producing crosslinked materials having good physical properties. The crosslinked materials can be combined with a rubbery polymer to produce compositions valuable for further downstream uses.