公开(公告)号：CA2219715A1

公开(公告)日：1998-05-07

申请号：CA2219715

申请日：1997-10-29

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E

IPC: B60C1/00 ,  C08F4/44 ,  C08F4/50 ,  C08F8/00 ,  C08F10/00 ,  C08F36/00 ,  C08F36/04 ,  C08K3/04 ,  C08K3/36 ,  C08L9/00 ,  C08L57/00 ,  C08F136/06 ,  C08L9/06 ,  C08F236/10 ,  C08L25/10 ,  C08F2/38

Abstract: The present invention provides a method of anionic synthesis of stable macrocyclic polymers that are compounded to form vulcanizable elastomeric compounds exhibiting reduced hysteresis properties. Cyclic organometallic compounds containing divalent metal atoms of Groups IIA and IIB of the Periodic System are employed as initiators of anionic polymerization of conjugated diene, vinyl aromatic and/or triene monomers. Coupling of the living ends of the resulting macrocyclic polymers or copolymers with a coupling agent or a coupling agent that is also a functionalizing agent results in stable macrocyclic polymers with improved hysteresis properties.

公开(公告)号：DE69315965D1

公开(公告)日：1998-02-05

申请号：DE69315965

申请日：1993-10-20

Applicant: BRIDGESTONE CORP

Inventor： LAWSON DAVID F ,  HALL JAMES E ,  OZAWA YOICHI

IPC: C08F4/48 ,  C07D295/22 ,  C08C19/44 ,  C08F4/00 ,  C08F4/06 ,  C08F4/08 ,  C08F36/04 ,  C08F236/04 ,  C07C209/66

Abstract: An acyclic alkane soluble anionic polymerization initiator includes a mixture of from about 90 to about 10 parts by weight of a lithio amine having the general formula A1Li and from about 10 to about 90 parts by weight of at least one other lithio amine having the general formula A2Li. A1 and A2 are selected from the dialkyl, alkyl, cycloalkyl and dicycloalkyl amine radicals and cyclic amine radicals. There is also provided a method of forming a mixture of anionic polymerization initiators, a functionalized polymer and a method of forming a functionalized polymer.

公开(公告)号：DE69304355D1

公开(公告)日：1996-10-10

申请号：DE69304355

申请日：1993-01-19

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E ,  ROGGEMAN DAVID M

IPC: C08F2/06 ,  C08F2/08 ,  C08F2/00 ,  C08F236/10 ,  C08F297/04

Abstract: A process is disclosed for preparing continuously tapered SBR-type copolymers optionally having a continuous change in microstructure along the polymer. The process produces tapered block copolymers with multiple glass transition temperatures of very small energy absorption, i.e. no definable glass transition temperature.

公开(公告)号：CA2165580A1

公开(公告)日：1996-06-24

申请号：CA2165580

申请日：1995-12-19

Applicant: BRIDGESTONE CORP

Inventor： ANTKOWIAK THOMAS A ,  HALL JAMES E ,  LAWSON DAVID F ,  SCHREFFLER JOHN R ,  STAYER MARK L JR

IPC: B60C1/00 ,  C08C19/44 ,  C08F4/08 ,  C08F4/42 ,  C08F4/48 ,  C08F8/00 ,  C08F10/00 ,  C08F10/08 ,  C08F10/14 ,  C08F12/00 ,  C08F12/04 ,  C08F36/04 ,  C08K3/00 ,  C08K3/02 ,  C08K3/04 ,  C08L3/04 ,  C08L15/00 ,  C08L23/18 ,  C08L25/04 ,  C08L101/00 ,  C07F1/02 ,  C08F36/00 ,  C08L9/00 ,  C08F2/38

Abstract: An anionic polymerization initiator includes the C-lithio reaction product of an organolithium compound and a tertiary-amino allyllithium or a tertiary-amino xylyllithium. When used in an anionic polymerization, a functional group from the initiator is incorporated onto the head of the growing polymer and a lithium atom is incorporated at the "living" end of the polymer chain prior toquenching. The initiator may be used to polymerize a monomer(s) including diolefin monomers, monovinyl aromatic monomers and trienes, and the living ends of the polymers are effectively maintained even at temperatures of up to 300.degree.F and higher. Such polymers exhibit an increased efficiency in coupling termination reactions, and products prepared from such polymers exhibit improved hysteresis characteristics. Products such as tires and the like can be prepared from such polymers and from vulcanizable elastomer compositions employing the polymers.

公开(公告)号：ES2081536T3

公开(公告)日：1996-03-16

申请号：ES92115067

申请日：1992-09-03

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E

IPC: C08F2/06 ,  C08F2/04 ,  C08F2/08 ,  C08F2/14 ,  C08F212/00 ,  C08F212/04 ,  C08F212/08 ,  C08F236/00 ,  C08F236/10

Abstract: The present invention relates to a process for the dispersion copolymerization of 35 to 70% by weight of vinyl substituted aromatic monomer and 30 to 65% by weight of conjugated diene monomer comprising carrying out the copolymerization in a reaction mixture containing a liquid aliphatic linear hydrocarbon dispersing medium, an anionic catalyst system, and a block copolymer dispersing agent comprising at least two polymer blocks wherein at least one of the polymer blocks is soluble in the dispersing medium and at least another of the polymer blocks is insoluble in the dispersing medium and the dispersing agent acts to disperse a random copolymer of vinyl substituted aromatics and conjugated dienes formed in the presence of the dispersing agent.

公开(公告)号：CA2153946A1

公开(公告)日：1996-01-19

申请号：CA2153946

申请日：1995-07-14

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E ,  LAWSON DAVIS F ,  ANTKOWIAK THOMAS A

IPC: C07F1/02 ,  C08C19/44 ,  C08F4/08 ,  C08F4/42 ,  C08F4/48 ,  C08F36/04 ,  C08F236/10

Abstract: An anionic initiator system formed by the reaction product of: (1) an organolithium compound with (2) the reaction product of (a) a heterocyclic ring containing a secondary amine and (b) diisopropenyl benzene, is employed to anionically initiate polymerization and to produce an elastomeric polymer containing heterocyclic functional sites incorporated at the head of the polymer chain. These polymers are compounded to exhibit reduced hysteresis over conventionally prepared polymers. Methods are also provided for preparing the functionalized polymers and elastomeric rubbers having reduced hysteresis.

公开(公告)号：DE69205931D1

公开(公告)日：1995-12-14

申请号：DE69205931

申请日：1992-09-03

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E

IPC: C08F2/06 ,  C08F2/04 ,  C08F2/08 ,  C08F2/14 ,  C08F212/00 ,  C08F212/04 ,  C08F212/08 ,  C08F236/00 ,  C08F236/10

Abstract: The present invention relates to a process for the dispersion copolymerization of 35 to 70% by weight of vinyl substituted aromatic monomer and 30 to 65% by weight of conjugated diene monomer comprising carrying out the copolymerization in a reaction mixture containing a liquid aliphatic linear hydrocarbon dispersing medium, an anionic catalyst system, and a block copolymer dispersing agent comprising at least two polymer blocks wherein at least one of the polymer blocks is soluble in the dispersing medium and at least another of the polymer blocks is insoluble in the dispersing medium and the dispersing agent acts to disperse a random copolymer of vinyl substituted aromatics and conjugated dienes formed in the presence of the dispersing agent.

公开(公告)号：DE69205714D1

公开(公告)日：1995-12-07

申请号：DE69205714

申请日：1992-03-27

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E

IPC: C07D407/04 ,  C08F4/42 ,  C08F4/48 ,  C08F4/56 ,  C08F36/04 ,  C08F212/00 ,  C08F212/06 ,  C08F212/32 ,  C08F236/10

Abstract: A method for preparing a diene polymer or copolymer having increased amounts of 1,2-microstructure is provided. The method involves polymerizing a diene monomer or mixture of a diene monomer and a vinyl aromatic hydrocarbon monomer in a hydrocarbon solvent in the presence of a catalytically effective amount of a catalyst composition comprising: (a) an organolithium initiator and (b) an oxolanyl cyclic acetal having the structural formula: wherein R is selected from the group consisting of hydrogen and alkyl groups containing from 1 to 4 carbon atoms and X is 0 or 1.

公开(公告)号：ZA9206696B

公开(公告)日：1993-05-10

申请号：ZA9206696

申请日：1992-09-03

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E

IPC: C08F2/00 ,  C08F2/38 ,  C08F36/00 ,  C08F236/04 ,  C08F236/10 ,  C08F297/04 ,  C08F ,  C08J

CPC classification number: C08F297/04 ,  C08F236/10 ,  C08F4/48 ,  C08F4/468 ,  C08F4/486

公开(公告)号：MX9205060A

公开(公告)日：1993-03-01

申请号：MX9205060

申请日：1992-09-03

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E

IPC: C08F2/00 ,  C08F2/38 ,  C08F36/00 ,  C08F236/04 ,  C08F236/10 ,  C08F297/04 ,  C08F112/04

Abstract: A process for preparing continuously tapered polymers and copolymers having a continuous change in microstructure along the polymer backbone is disclosed. The process produces polymers and copolymers with multiple glass transition temperatures of very small energy absorption, i.e. no definable glass transition temperature. The polymers have a flexible chain end and they progressively become stiffer along the length of the chain.