公开(公告)号：DE69321086D1

公开(公告)日：1998-10-22

申请号：DE69321086

申请日：1993-12-09

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E

IPC: C08F2/44 ,  C08F212/00 ,  C08F212/06 ,  C08F236/10 ,  C08F297/04

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 hydrocarbon dispersing medium, an anionic catalyst system, and an "A" block of a copolymer dispersing agent, the dispersing agent having 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 is formed in situ.

公开(公告)号：DE69410730T2

公开(公告)日：1998-10-01

申请号：DE69410730

申请日：1994-10-17

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E ,  ROGGEMAN DAVID M

IPC: C08F2/44 ,  C08F2/00 ,  C08F212/00 ,  C08F212/06 ,  C08F236/10 ,  C08F297/04 ,  C08L53/02 ,  C08L25/08

Abstract: In accordance with the present invention, a continuous polymerization process is provided for the preparation of a rubbery copolymer by the non-aqueous dispersion random polymerization of a mixture of 30 to 65% by weight of a conjugated diolefin monomer, preferably butadiene, and 35 to 70% by weight of a vinyl substituted aromatic monomer, preferably styrene, in a liquid aliphatic hydrocarbon dispersion medium with an anionic initiator catalyst system in the presence of a block copolymeric dispersing agent which is continuously prepared in-situ. At least one block of the dispersing agent is continuously prepared prior to the dispersion polymerization reaction and a second block of the dispersing agent and a rubbery copolymer are continuously prepared in-situ during the dispersion copolymerization. The second block of the dispersing agent has the polymer structure of the continuously produced rubbery copolymer.

公开(公告)号：DE69410730D1

公开(公告)日：1998-07-09

申请号：DE69410730

申请日：1994-10-17

Applicant: BRIDGESTONE CORP

Inventor： HALL JAMES E ,  ROGGEMAN DAVID M

IPC: C08F2/44 ,  C08F2/00 ,  C08F212/00 ,  C08F212/06 ,  C08F236/10 ,  C08F297/04 ,  C08L53/02 ,  C08L25/08

Abstract: In accordance with the present invention, a continuous polymerization process is provided for the preparation of a rubbery copolymer by the non-aqueous dispersion random polymerization of a mixture of 30 to 65% by weight of a conjugated diolefin monomer, preferably butadiene, and 35 to 70% by weight of a vinyl substituted aromatic monomer, preferably styrene, in a liquid aliphatic hydrocarbon dispersion medium with an anionic initiator catalyst system in the presence of a block copolymeric dispersing agent which is continuously prepared in-situ. At least one block of the dispersing agent is continuously prepared prior to the dispersion polymerization reaction and a second block of the dispersing agent and a rubbery copolymer are continuously prepared in-situ during the dispersion copolymerization. The second block of the dispersing agent has the polymer structure of the continuously produced rubbery copolymer.

公开(公告)号：DE69225182D1

公开(公告)日：1998-05-28

申请号：DE69225182

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

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.

公开(公告)号：DE69407533T2

公开(公告)日：1998-04-16

申请号：DE69407533

申请日：1994-10-18

Applicant: BRIDGESTONE CORP

Inventor： GRAVES DANIEL F ,  HALL JAMES E ,  SHUTTLEWORTH WILLIAM J

IPC: C08F4/42 ,  C08F4/48 ,  C08F12/04 ,  C08F297/04 ,  C07D307/06 ,  C08F12/08 ,  C08F36/04

Abstract: Prepn. of a polymer or block copolymer comprises polymerising 15-100 wt.% vinyl aromatic hydrocarbon monomer and 0-85 wt.% diene monomer in a hydrocarbon solvent in the presence of an effective amt. of a catalyst compsn. (I) comprising: (a) an organolithium initiator; and (b) a 2,5-substd. THF of formula (1); R1, R1 = H or 1-4C alkyl; and (R2, R2 = 1-4C alkyl. Also claimed is the catalyst compsn. comprising an anionic initiator of (a), and (b).

公开(公告)号：DE69407533D1

公开(公告)日：1998-02-05

申请号：DE69407533

申请日：1994-10-18

Applicant: BRIDGESTONE CORP

Inventor： GRAVES DANIEL F ,  HALL JAMES E ,  SHUTTLEWORTH WILLIAM J

IPC: C08F4/42 ,  C08F4/48 ,  C08F12/04 ,  C08F297/04 ,  C07D307/06 ,  C08F12/08 ,  C08F36/04

Abstract: Prepn. of a polymer or block copolymer comprises polymerising 15-100 wt.% vinyl aromatic hydrocarbon monomer and 0-85 wt.% diene monomer in a hydrocarbon solvent in the presence of an effective amt. of a catalyst compsn. (I) comprising: (a) an organolithium initiator; and (b) a 2,5-substd. THF of formula (1); R1, R1 = H or 1-4C alkyl; and (R2, R2 = 1-4C alkyl. Also claimed is the catalyst compsn. comprising an anionic initiator of (a), and (b).

公开(公告)号：DE69304355T2

公开(公告)日：1997-01-23

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：DE69205714T2

公开(公告)日：1996-04-11

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：CA2153945A1

公开(公告)日：1996-01-19

申请号：CA2153945

申请日：1995-07-14

Applicant: BRIDGESTONE CORP

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

IPC: C07F1/02 ,  C08F4/42 ,  C08F4/48 ,  C08F36/04

Abstract: An anionic initiator system formed by the reaction product of: (1) an organolithium compound with (2) the reaction product of (a) a secondary amine and (b) diisopropenyl benzene, initiates polymerization to produce a polymer containing tertiary amine functional sites incorporated at the head of the polymer chain. A subclass of these polymers can be compounded to exhibit reduced hysteresis over conventionally prepared polymers.

公开(公告)号：ZA926696B

公开(公告)日：1993-05-10

申请号：ZA926696

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

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.