# US 5,349,020 A · Vulcanizable rubber composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,349,020 A - Document ID: US5349020A - Status: Granted - Kind: A - Application number: 08/026,783 - Filed: 1993-03-05 - Granted: 1994-09-20 - Earliest claimed: 1992-03-06 - Assignees: Mitsui Petrochemical Industries, Ltd. - Inventors: Keiji Okada; Kazuhiko Murata; Tetsuo Tojo; Masaaki Kawasaki; Toshimasa Takata - Web page: https://patentgrep.com/patent/US5349020A ## CPC - C08L 21/00: Compositions of unspecified rubbers - C08L 23/18: Homopolymers or copolymers of hydrocarbons having four or more carbon atoms - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract There is provided a composition comprising a higher a-olefin copolymer (1) obtained by copolymerization in the presence of a specific olefin polymerization catalyst of a specific higher .alpha.-olefin, a specific .alpha., .omega.-diene of the formula (I) and a specific non-conjugated diene of the formula (II), and a rubber (2) selected from the group consisting of a diene rubber, an ethylene/a-olefin copolymer, a nitrile rubber and a hydrogenated nitrile rubber. The composition is excellent in workability strength characteristics, weatherability, ozone resistance and dynamic fatigue resistance, as well as excellent in adhesive properties to fiber and in vibration-insulating properties and damping properties. ## Claims ### Claim 1 A vulcanizable rubber composition comprising: a higher .alpha.-olefin (1) consisting of a higher .alpha.-olefin having 6-20 carbon atoms, and an .alpha.,.omega.-diene represented by the following general formula (I) ##STR8## wherein n is an integer of 1-3, and R.sup.1 and R.sup.2 each represent independently a hydrogen atom or an alkyl group of 1-8 carbon atoms, and a non-conjugated diene represented by the following general formula (II) ##STR9## wherein n is an integer of 1-5, R.sup.3 represents an alkyl group of 1-4 carbon atoms, and R.sup.4 and R.sup.5 each represent a hydrogen atom or an alkyl group of 1-8 carbon atoms, provided that both R.sup.4 and R.sup.5 are not hydrogen atoms simultaneously, and at least one rubber (2) selected from the group consisting of an ethylene/.alpha.-olefin copolymer rubber, a nitrile rubber and a hydrogenated nitrile rubber, which composition has a weight ratio ((1)/(2)) of said higher .alpha.-olefin copolymer (1) to said rubber (2) in the range of from 5/95 to 95/5. ### Claim 2 (depends on 1) The rubber composition as claimed in claim 1 wherein the higher C.alpha.-olefin copolymer (1) has a molar ratio of the higher .alpha.-olefin to the .alpha., .omega.-diene (higher .alpha.-olefin/.alpha., .omega.-diene) in the range of from 95/5 to 50/50. ### Claim 3 (depends on 1) The rubber composition as claimed in claim 1 wherein an intrinsic viscosity (.eta.) of the higher .alpha.-olefin copolymer (1) as measured in decalin at 135.degree. C. is in the range of 1.0-10.0 dl/g. ### Claim 4 (depends on 1) The rubber composition as claimed in claim 1 wherein an iodine value of the higher .alpha.-olefin copolymer (1) is 1-50. ### Claim 5 (depends on 1) The rubber composition as claimed in claim 1 wherein the constituent .alpha.-olefin of the ethylene/.alpha.-olefin copolymer (2) is propylene or 1-butene. ### Claim 6 (depends on 1) The rubber composition as claimed in claim 1 wherein an intrinsic viscosity (.eta.) of the ethylene/.alpha.-olefin copolymer (2) as measured in decalin at 135.degree. C. is in the range of 0.8-5.0 dl/g. ### Claim 7 (depends on 1) The rubber composition as claimed in claim 1 wherein the ethylene/.alpha.-olefin copolymer (2) contains 0.1-5 mol % of a non-conjugated polyene. ### Claim 8 A vulcanizable rubber composition for a tire sidewall comprising: a higher .alpha.-olefin (1) consisting of a higher .alpha.-olefin having 6-20 carbon atoms, and an .alpha., .omega.-diene represented by the following general formula (I) ##STR10## wherein n is an integer of 1-3, and R.sup.1 and R.sup.2 each represent independently a hydrogen atom or an alkyl group of 1-8 carbon atoms, and a non-conjugated diene represented by the following general formula (II) ##STR11## wherein n is an integer of 1-5, R.sup.3 represents an alkyl group of 1-4 carbon atoms, and R.sup.4 and R.sup.5 each represent a hydrogen atom or an alkyl group of 1-8 carbon atoms, provided that both R.sup.4 and R.sup.5 are not hydrogen atoms simultaneously, and a diene rubber (2) which is a member selected from the group consisting of a natural rubber, isoprene rubber, SBR, BR or a mixture thereof, which composition has a weight ratio ((1)/(2)) is in the range of from 5/95 to 50/50. ### Claim 9 A vulcanizable rubber composition for a tire tread comprising: a higher .alpha.-olefin (1) consisting of a higher .alpha.-olefin having 6-20 carbon atoms, and an .alpha., .omega.-diene represented by the following general formula (I) ##STR12## wherein n is an integer of 1-3, and R.sup.1 and R.sup.2 each represent independently a hydrogen atom or an alkyl group of 1-8 carbon atoms, and a non-conjugated diene represented by the following general formula (II) ##STR13## wherein n is an integer of 1-5, R.sup.3 represents an alkyl group of 1-4 carbon atoms, and R.sup.4 and R.sup.5 each represent a hydrogen atom or an alkyl group of 1-8 carbon atoms, provided that both R.sup.4 and R.sup.5 are not hydrogen atoms simultaneously, and a diene rubber (2) which is a member selected from the group consisting of a natural rubber, isoprene rubber, SBR, BR or a mixture thereof, which composition has a weight ratio ((1)/(2)) is in the range of from 1/99 to 50/50. ### Claim 10 A vulcanizable rubber composition comprising: a higher .alpha.-olefin (1) consisting of a higher .alpha.-olefin having 6-20 carbon atoms, and an .alpha., .omega.-diene represented by the following general formula (I) ##STR14## wherein n is an integer of 1-3, and R.sup.1 and R.sup.2 each represent independently a hydrogen atom or an alkyl group of 1-8 carbon atoms, and a non-conjugated diene represented by the following general formula (II) ##STR15## wherein n is an integer of 1-5, R.sup.3 represents an alkyl group of 1-4 carbon atoms, and R.sup.4 and R.sup.5 each represent a hydrogen atom or an alkyl group of 1-8 carbon atoms, provided that both R.sup.4 and R.sup.5 are not hydrogen atoms simultaneously, and at least one diene rubber (2) which is a member selected from the group consisting of a natural rubber, isprene rubber, SBR, BR or a mixture thereof, which composition has a weight ratio ((1)/(2)) of said higher .alpha.-olefin copolymer (1) to said rubber (2) in the range of from 5/95 to 95/5. ### Claim 11 (depends on 10) The rubber composition as claimed in claim 10 wherein the higher .alpha.-olefin copolymer (1) has a molar ratio of the higher .alpha.-olefin to the .alpha., .omega.-diene (higher .alpha.-olefin/.alpha., .omega.-diene) in the range of from 95/5 to 50/50. ### Claim 12 (depends on 10) The rubber composition as claimed in claim 10 wherein an intrinsic viscosity (.eta.) of the higher .alpha.-olefin copolymer (1) as measured in decalin at 135.degree. C. is in the range of 1.0-10.0 dl/g. ### Claim 13 (depends on 10) The rubber composition as claimed in claim 10 wherein an iodine value of the higher .alpha.-olefin copolymer (1) is 1-50.