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AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsKoichi Nishimura, Tatsuya Kawamura, Toyozo Fujioka
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A hydrogenated product of a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound. The copolymer has a softening point of from 60 to 130.degree. C., a vinyl-substituted aromatic compound content of from 30 to 90% by weight, a bromine number of from 30 to 90 g/100 g, a number average molecular weight of from 400 to 1,000, and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of 2.5 or less. The hydrogenated product has a softening point of 60 to 130.degree. C., a vinyl-substituted aromatic compound content of 0 to 35% by weight, a bromine number of 0 to 300 g/100 g, a number average molecular weight of 400 to 1,000 and a weight average molecular weight/number average molecular weight ratio of 2.5 or less. The hydrogenated product is useful as a substrate in the production of a tackifier and an adhesive.
A hydrogenated product of a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound which is obtained by hydrogenating a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound, said copolymer having a softening point of from 60 to 130.degree. C., a vinyl-substituted aromatic compound content of from 30 to 90% by weight, a bromine number of from 30 to 90 g/100 g, a number average molecular weight of from 400 to 1,000 and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of 2.5 or less, said copolymer produced by conducting a thermal copolymerization while adding in divided portions a mixture of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound to a solvent, said solvent being in an amount of 50 to 500 parts by weight per 100 parts by weight in total of the cyclopentadiene and/or dicyclopentadiene and the vinyl-substituted aromatic compound, said hydrogenated product having a softening point of from 70 to 140.degree. C., a vinyl-substituted aromatic compound content of from 0 to 35% by weight, a bromine number of from 0 to 30 g/100 g, a number average molecular weight of from 400 to 1,000 and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of 2.5 or less.
A hydrogenated product of a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted compound which is obtained by hydrogenating a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound, said copolymer having a softening point of from 60 to 130.degree. C., a vinyl-substituted aromatic compound content of from 30 to 90% by weight, a bromine number of from 30 to 90 g/100 g, a number average molecular weight of from 400 to 1,000, and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of less than 1.9, said copolymer produced by conducting a thermal copolymerization while adding in divided portions a mixture of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound to a solvent in the presence of a sulfur compound, said hydrogenated product having a softening point of from 70 to 140.degree. C., a vinyl-substituted aromatic compound content of from 0 to 35% by weight, a bromine number of from 0 to 30 g/100 g, a number average molecular weight of from 400 to 1,000, and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of less than 1.9.
A hydrogenated product of a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted compound which is obtained by hydrogenating a copolymer of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound, said copolymer having a softening point of from 60 to 130.degree. C., a vinyl-substituted aromatic compound content of from 30 to 90% by weight, a bromine number of from 30 to 90 g/100 g, a number average molecular weight of from 400 to 1,000, and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of less than 1.9, said copolymer produced by conducting a thermal copolymerization while adding in divided portions a mixture of cyclopentadiene and/or dicyclopentadiene and a vinyl-substituted aromatic compound to a solvent in the presence of at least one compound selected from the group consisting of a hydroxybenzene compound, a hydroxynaphthalene compound and a quinone compound, said hydrogenated product having a softening point of from 70 to 140.degree. C., a vinyl-substituted aromatic compound content of from 0 to 35% by weight, a bromine number of from 0 to 30 g/100 g, a number average molecular weight of from 400 to 1,000, and a weight average molecular weight/number average molecular weight (Mw/Mn) ratio of less than 1.9.
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