Linda A Chamberlain

Author:

Linda L. Chamberlain

ISBN #:

0471079510

Author:

Linda L. Chamberlain

ISBN #:

0471189693

Author:

Linda L. Chamberlain

ISBN #:

0876309252

Author:

Linda Chamberlain

ISBN #:

0876309260

US Patent:

51323729, Jul 21, 1992

Filed:

Sep 9, 1991

Appl. No.:

7/756392

Inventors:

Linda R. Chamberlain - Richmond TX
Carma J. Gibler - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08F 804

US Classification:

525338

Abstract:

This is an improved process for the hydrogenation of conjugated diolefin polymers which comprises polymerizing or copolymerizing at least one conjugated diolefin with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer, terminating the polymerization by the addition of hydrogen and effecting selective hydrogenation of the unsaturated double bonds in the conjugated diolefin units of the terminated polymer by contacting the polymer, in the absence of hydrocarbon lithium and alkoxy lithium compounds, with hydrogen in the presence of at least one bis(cyclopentadienyl)titanium compound. The improvement is the use of methyl benzoate as a promoter in the hydrogenation step.

US Patent:

52800598, Jan 18, 1994

Filed:

Apr 16, 1993

Appl. No.:

8/049690

Inventors:

Linda R. Chamberlain - Richmond TX
Carma J. Gibler - Houston TX
Miguel Prado - Sugarland TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08F 800

US Classification:

524147

Abstract:

The present invention is an improvement upon a process for hydrogenating a diene polymer by contacting the polymer in the presence of hydrogen with a titanium hydrogenation catalyst. The improvement comprises preventing discoloration of the hydrogenated polymer by treating it with water, a peroxide or alcohol in the absence of oxygen and adding a non-phenolic antioxidant to the polymer.

US Patent:

51771551, Jan 5, 1993

Filed:

May 13, 1991

Appl. No.:

7/699028

Inventors:

Linda R. Chamberlain - Richmond TX
Carma J. Gibler - Houston TX
Richard A. Kemp - Stafford TX
Stanley E. Wilson - Houston TX
Thomas F. Brownscombe - Houston TX

Assignee:

Shell Oil Company

International Classification:

C08F 804

US Classification:

525338

Abstract:

This invention provides a catalyst and a process for the hydrogenation of conjugated diolefin polymers which first involves the polymerization or copolymerization of such monomers with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer. The living polymer can be terminated by the addition of hydrogen. Finally, selective hydrogenation of the unsaturable double bonds in the conjugated diolefin units of the terminated polymer is carried out in the presence of an initiator and at least one rare earth compound of the formula *Cp. sub. MR where *Cp is pentamethylcyclopentadiene, M is a rare earth element and R is alkyl, aryl, aralkyl or hydrogen.

US Patent:

51624460, Nov 10, 1992

Filed:

Oct 30, 1991

Appl. No.:

7/785114

Inventors:

Carma J. Gibler - Houston TX
Linda R. Chamberlain - Richmond TX
Richard A. Kemp - Stafford TX
Stanley E. Wilson - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08F 850

US Classification:

525338

Abstract:

This is a process for the depolymerization of conjugated diene polymers which comprises contacting the polymers with hydrogen in the presence of at least one bis(cyclopentadienyl)zirconium compound.

US Patent:

52429865, Sep 7, 1993

Filed:

Aug 10, 1992

Appl. No.:

7/927904

Inventors:

Carma J. Gibler - Houston TX
Linda R. Chamberlain - Richmond TX
Ronald J. Hoxmeier - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08F 804

US Classification:

5253328

Abstract:

This is a process for the partial hydrogenation of conjugated diolefin polymers which comprises polymerizing at least one conjugated diolefin with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer comprising (1) ethylenic unsaturation between backbone carbons wherein at least one of the doubly bound backbone carbons is substituted and (2) ethylenic unsaturation which is not between doubly bound backbone carbons wherein at least one is substituted, terminating the polymerization, and effecting selective hydrogenation of the ethylenic unsaturation in the conjugated diolefin units of the terminated polymer which is not between doubly bound backbone carbons wherein at least one is substituted, by contacting the polymer with hydrogen in the presence of no more than 0. 02 mM of catalyst per gram of polymer of a bis(cyclopentadienyl)titanium catalyst.

US Patent:

51514753, Sep 29, 1992

Filed:

Apr 15, 1991

Appl. No.:

7/685111

Inventors:

Craig A. Stevens - Houston TX
Carma J. Gibler - Houston TX
Linda R. Chamberlain - Richmond TX
Thomas F. Brownscombe - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08F 238

US Classification:

526 83

Abstract:

This is an improvement upon a process which comprises anionically polymerizing monomers with an anionic polymerization initiator in a suitable solvent thereby creating a living polymer. The improvement comprises terminating the polymerization by the addition of a terminating agent selected from the group consisting of boranes, ammonia, halogens, hydrocarbons containing a C-H group where the carbon is connected directly to a triply-bound carbon or to two doubly-bound carbons and silanes.

US Patent:

52429610, Sep 7, 1993

Filed:

May 28, 1992

Appl. No.:

7/889349

Inventors:

Linda R. Chamberlain - Richmond TX
Carma J. Gibler - Houston TX
Miguel Prado - Sugarland TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08F 800

US Classification:

524147

Abstract:

The present invention is an improvement upon a process for hydrogenating a diene polymer by contacting the polymer in the presence of hydrogen with a titanium hydrogenation catalyst. The improvement comprises preventing discoloration of the hydrogenated polymer by treating it with water, a peroxide or alcohol in the absence of oxygen and adding a non-phenolic antioxidant to the polymer.

US Patent:

51439905, Sep 1, 1992

Filed:

May 14, 1990

Appl. No.:

7/522693

Inventors:

Carma J. Gibler - Houston TX
Linda R. Chamberlain - Richmond TX
Thomas F. Brownscombe - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08F 238

US Classification:

526 82

Abstract:

This is an improvement upon a process which comprises anionically polymerizing monomers with an anionic polymerization initiator in a suitable solvent thereby creating a living polymer. The improvement comprises terminating the polymerization by the addition of hydrogen which reacts with the living polymer to terminate the polymer chain.