Patents by Inventor Olivier Tardif
Olivier Tardif has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9701776Abstract: The present invention provides a random copolymer that is used for manufacturing a rubber having high fracture strength and excellent low loss properties (low heat generation properties) and that includes randomly arranged monomer units of a conjugated diene compound and of a non-conjugated olefin, a rubber composition containing the random copolymer, a cross-linked rubber composition obtained by crosslinking the rubber composition, and a tire manufactured by using the rubber composition or the cross-linked rubber composition. A copolymer of a conjugated diene compound and a non-conjugated olefin includes a random copolymer having randomly arranged monomer units of the conjugated diene compound and of the non-conjugated olefin, which random copolymer contains, by at least 5 mol %, alternate bonding units of the conjugated diene compound and the non-conjugated olefin in a unit derived from the non-conjugated olefin.Type: GrantFiled: February 3, 2012Date of Patent: July 11, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Patent number: 9670302Abstract: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a tapered copolymer including: at least one of a block sequence including monomer units of the conjugated diene compound and a block sequence including monomer units of the non-conjugated olefin; and a random sequence including randomly arranged monomer units of the conjugated diene compound and monomer units of the non-conjugated olefin.Type: GrantFiled: July 26, 2011Date of Patent: June 6, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Publication number: 20170101500Abstract: A multiblock copolymer, obtainable by copolymerization of a conjugated diene compound and a non-conjugated olefin, wherein: a structure of the multiblock copolymer includes A-(B-A)x and/or B-(A-B)x, wherein “A” represents a block portion constituted of monomer units of a non-conjugated olefin, “B” represents a block portion constituted of monomer units of a conjugated diene compound, and “x” represents an integer ?1; content of the non-conjugated olefin portion is ?30 mass %; and storage modulus G? at 130° C., measured by rubber process analysis using a rubber process analyzer, i.e. RPA, according to ASTM D6204, is ?20 kPa. It is possible to obtain vulcanized rubber and thus a tire having high fracture resistance and high weather resistance from the multiblock copolymer and a rubber composition derived therefrom.Type: ApplicationFiled: February 24, 2015Publication date: April 13, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Olivier TARDIF, Shigeki OISHI
-
Publication number: 20170073450Abstract: A multiblock copolymer, obtainable by copolymerization of a conjugated diene compound and a non-conjugated olefin, is characterized in that: a structure of the multiblock copolymer includes A-(B-A)x and/or B-(A-B)x, wherein “A” represents a block portion constituted of monomer units of a non-conjugated olefin, “B” represents a block portion constituted of monomer units of a conjugated diene compound, and “x” represents an integer ?1; content of the non-conjugated olefin portion is 50 mol %; 0 mol % <crystal content of the non-conjugated olefin portion 20 mol %; and 0% <degree of crystallinity of the non-conjugated olefin portion 40%. Vulcanized rubber having high fracture resistance and high crack resistance (thus a rubber composition and a tire each using the vulcanized rubber and having such excellent physical properties) can be manufactured from the multiblock polymer.Type: ApplicationFiled: February 24, 2015Publication date: March 16, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Madoka KIMURA, Yasuo HORIKAWA, Olivier TARDIF
-
Patent number: 9399689Abstract: The present invention provides a method for synthesizing a polybutadiene more efficiently and stably which is possible to obtain a rubber composition and a tire excellent in durability (fracture resistance, wear resistance and crack growth resistance). A method for producing a polybutadiene, where a butadiene monomer is polymerized with the existence of rare-earth element compounds represented by the following formula (i): M-(NQ)1(NQ)2(NQ)3??(i) (in the formula, M is at least one selected from lanthanides, scandium and yttrium; (NQ)1, (NQ)2 and (NQ)3 are amide groups which may be the same or different to each other, and have M-N bonds).Type: GrantFiled: June 18, 2013Date of Patent: July 26, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Satoru Tamaki, Olivier Tardif
-
Patent number: 9346907Abstract: This invention relates to a method for producing a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound having a high cis-1,4 bond content of a conjugated diene compound portion, and more particularly to a method for producing a copolymer characterized by comprising a step of polymerizing a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound in the presence of a polymerization catalyst composition including at least one complex selected from a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and CpR is independently a non-substituted or substituted indenyl, and Ra-Rf are independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on.Type: GrantFiled: August 28, 2014Date of Patent: May 24, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa
-
Patent number: 9266978Abstract: Disclosed is a method of manufacturing a copolymer of a conjugated diene compound and an olefin other than the conjugated diene compound, where a conjugated diene compound and an olefin other than the conjugated diene compound is copolymerized in the presence of a polymerization catalyst composition containing components: (A) a rare earth element compound or a reactant of the rare earth element compound and a Lewis base; and (B) at least one selected from a group consisting of an ionic compound (B-1) composed of a non-coordinating anion and a cation, an aluminoxane (B-2), and at least one kind of halogen compound (B-3) selected from among a Lewis acid, a complex compound of a metal halide and a Lewis base, and an organic compound containing active halogen (when containing at least one of (B-1) and (B-3), the polymerization catalyst composition further contains component (C): an organometallic compound).Type: GrantFiled: July 22, 2011Date of Patent: February 23, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Shojiro Kaita, Olivier Tardif, Hideki Kitano
-
Patent number: 9212274Abstract: The present invention provides a rubber composition that is used for manufacturing a rubber excellent in weather resistance, fracture resistance and crack growth resistance, and that contains a conjugated diene compound/non-conjugated olefin copolymer, a conjugate diene-based polymer and a non-conjugated diene compound/non-conjugated olefin copolymer, a rubber composition for tire side use using the rubber composition for tire sidewall members, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a tire. The rubber composition includes: (A) a conjugated diene compound/non-conjugated olefin copolymer containing a conjugated diene compound-derived unit by at least 40 mol %; (B) a conjugated diene-based polymer; and (C) a non-conjugated diene compound/non-conjugated olefin copolymer containing an ethylene-propylene-diene rubber.Type: GrantFiled: February 27, 2012Date of Patent: December 15, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Junko Matsushita, Yasuo Horikawa, Shojiro Kaita, Olivier Tardif
-
Patent number: 9181376Abstract: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a block copolymer, the conjugated diene compound unit having 1,2 adduct (including 3,4 adduct) content of 5% or less or the conjugated diene compound unit having a cis-1,4 bond content of more than 92%, in which preferred examples of the conjugated diene compound include 1,3-butadiene and isoprene, and preferred examples of the non-conjugated olefin include ethylene, propylene, and 1-butene.Type: GrantFiled: July 26, 2011Date of Patent: November 10, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Patent number: 9139680Abstract: Provided is a block copolymer of a conjugated diene compound and a non-conjugated olefin, a rubber composition including the block copolymer, a crosslinked rubber obtained by crosslinking the rubber composition, and a tire using the rubber composition or the crosslinked rubber composition. The copolymer of the present invention is a block copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer having a peak area in a temperature range in a range of 70° C. to 110° C. that accounts for at least 60% of a peak area in a range of 40° C. to 140° C. and a peak area in a range of 110° C. to 140° C. that accounts for 20% or less of a peak area in a range of 40° C. to 140° C., the peak areas being measured by the differential scanning calorimetry (DSC) according to JIS K 7121-1987.Type: GrantFiled: May 29, 2012Date of Patent: September 22, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Patent number: 9074035Abstract: In a copolymer of a conjugated diene compound and a non-conjugated olefin, the conjugated diene unit has a cis-1,4 bond content of greater than 70.5% and the non-conjugated olefin is contained in an amount of 10 mol % or more.Type: GrantFiled: July 26, 2011Date of Patent: July 7, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano
-
Publication number: 20150183904Abstract: The present invention provides a method for synthesizing a polybutadiene more efficiently and stably which is possible to obtain a rubber composition and a tire excellent in durability (fracture resistance, wear resistance and crack growth resistance). A method for producing a polybutadiene, where a butadiene monomer is polymerized with the existence of rare-earth element compounds represented by the following formula (i): M-(NQ)1(NQ)2(NQ)3??(i) (in the formula, M is at least one selected from lanthanides, scandium and yttrium; (NQ)1, (NQ)2 and (NQ)3 are amide groups which may be the same or different to each other, and have M-N bonds).Type: ApplicationFiled: June 18, 2013Publication date: July 2, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Satoru Tamaki, Olivier Tardif
-
Patent number: 9056936Abstract: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a random copolymer including randomly arranged monomer units of the conjugated diene compound and of the non-conjugated olefin, in which the non-conjugated olefin is preferably an acyclic olefin, the non-conjugated olefin preferably has 2 to 10 carbon atoms, and specific examples of the non-conjugated olefin preferably include ethylene, propylene, and 1-butene.Type: GrantFiled: July 26, 2011Date of Patent: June 16, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Patent number: 8987347Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin that is used for manufacturing a rubber excellent in crack growth resistance, heat resistance and ozone resistance and that includes a cis-1,4 bond at a unit derived from the conjugated diene compound, a rubber composition containing the copolymer, a rubber composition for tire treads using the rubber composition for tire tread members, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a tire using the rubber composition or the crosslinked rubber composition. In the copolymer of a conjugated diene compound and a non-conjugated olefin, the cis-1,4 bond content of a unit derived from the conjugated diene compound is more than 92%.Type: GrantFiled: February 1, 2012Date of Patent: March 24, 2015Assignee: Bridgestone CorporationInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Patent number: 8962743Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin, in which the conjugated diene unit has cis-1,4 bonds and the non-conjugated olefin contains many ethylene structures. In a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound, the conjugated diene unit has a cis-1,4 bond content of 50% or more and the unconjugated olefin is contained in an amount of 20 mol % or more.Type: GrantFiled: July 27, 2011Date of Patent: February 24, 2015Assignee: Bridgestone CorporationInventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano
-
Patent number: 8962744Abstract: The present invention provides a random copolymer that is used for manufacturing a tire having excellent rollability and wear resistance and that includes randomly arranged monomer units of a conjugated diene compound and of a non-conjugated olefin, a rubber composition containing the random copolymer, a cross-linked rubber composition obtained by crosslinking the rubber composition, and a tire manufactured by using the rubber composition or the cross-linked rubber composition. A copolymer of a conjugated diene compound and a non-conjugated olefin, including a random copolymer having randomly arranged monomer units of the conjugated diene compound and of the non-conjugated olefin, and containing, by more than 30 mol %, a unit derived from the conjugated diene compound.Type: GrantFiled: February 2, 2012Date of Patent: February 24, 2015Assignee: Bridgestone CorporationInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Publication number: 20140371408Abstract: This invention relates to a method for producing a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound having a high cis-1,4 bond content of a conjugated diene compound portion, and more particularly to a method for producing a copolymer characterized by comprising a step of polymerizing a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound in the presence of a polymerization catalyst composition including at least one complex selected from a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and CpR is independently a non-substituted or substituted indenyl, and Ra-Rf are independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on.Type: ApplicationFiled: August 28, 2014Publication date: December 18, 2014Inventors: Shojiro KAITA, Olivier TARDIF, Yasuo HORIKAWA
-
Patent number: 8853339Abstract: This invention relates to a method for producing a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound having a high cis-1,4 bond content of a conjugated diene compound portion, and more particularly to a method for producing a copolymer characterized by comprising a step of polymerizing a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound in the presence of a polymerization catalyst composition including at least one complex selected from a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and CpR is independently a non-substituted or substituted indenyl, and Ra-Rf are independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on.Type: GrantFiled: July 30, 2010Date of Patent: October 7, 2014Assignee: Bridgestone CorporationInventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa
-
Publication number: 20140179861Abstract: Provided is a block copolymer of a conjugated diene compound and a non-conjugated olefin, a rubber composition including the block copolymer, a crosslinked rubber obtained by crosslinking the rubber composition, and a tire using the rubber composition or the crosslinked rubber composition. The copolymer of the present invention is a block copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer having a peak area in a temperature range in a range of 70° C. to 110° C. that accounts for at least 60% of a peak area in a range of 40° C. to 140° C. and a peak area in a range of 110° C. to 140° C. that accounts for 20% or less of a peak area in a range of 40° C. to 140° C., the peak areas being measured by the differential scanning calorimetry (DSC) according to JIS K 7121-1987.Type: ApplicationFiled: May 29, 2012Publication date: June 26, 2014Applicant: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
-
Patent number: 8653290Abstract: Disclosed are a metallocene complex represented by the general formula (I), (II) or (III), and a polymerization catalyst composition containing such a metallocene complex. In the formulae (I), (II) and (III), M represents a lanthanoid element, scandium or yttrium; CpR independently represents an unsubstituted or substituted indenyl; CpR? represents an unsubstituted or substituted cyclopentadienyl, indenyl or fluorenyl; Ra-Rf independently represents a hydrogen or an alkyl group having 1-3 carbon atoms; X and X? respectively represent a hydrogen atom, a halogen atom, an alkoxide group, a thiolate group, an amide group, a silyl group or a hydrocarbon group having 1-20 carbon atoms; L represents a neutral Lewis base; w represents an integer of 0-3; and [B]? represents a non-coordinating anion.Type: GrantFiled: May 2, 2007Date of Patent: February 18, 2014Assignees: Riken, Bridgestone Corporation, JSR CorporationInventors: Shojiro Kaita, Olivier Tardif