METHOD TO CONTROL INCREASE IN VISCOSITY DURING AGING OF SILOXANE MODIFIED POLYMER

Title:

METHOD TO CONTROL INCREASE IN VISCOSITY DURING AGING OF SILOXANE MODIFIED POLYMER

Document Type and Number:

Japanese Patent JP2011225888

Kind Code:

A

Abstract:

To control Mooney viscosity while a siloxane-functionalized polymer ages.

A method for controlling any increase in Mooney viscosity during aging of the siloxane-functionalized polymer includes the step of adding, after polymerization but still in the presence of an inert solvent and prior to contacting the polymer with water, a viscosity stabilizing effective amount of a viscosity stabilizing agent selected from the group consisting of alkyl alkoxysilanes of structural formula R1nSi(OR2)4-n (wherein R1 is selected from the group consisting of C1 to C20 alkyl, C4 to C10 cycloalkyl, or C5 to C20 aromatic groups, wherein R2 may be the same as or different from R1 and is selected from the group consisting of C1 to C20 alkyl, C4 to C10 cycloalkyl, or C5 to C20 aromatic groups, and n is an integer from 1 to 3). The method provides for the stabilization of Mooney viscosity of siloxane-functionalized polymers at any given level upon aging.

Inventors:

HOGAN TERRENCE E
LIN CHEN-CHY
HERGENROTHER WILLIAM L

Application Number:

JP2011139724A

Publication Date:

November 10, 2011

Filing Date:

June 23, 2011

Export Citation:

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Assignee:

BRIDGESTONE CORP

International Classes:

B60C1/00; C08C19/25; C08F8/42; C08C19/44; C08K5/13; C08K5/5419; C08L15/00

Domestic Patent References:

JPH10316800A	1998-12-02
JPH1036436A	1998-02-10
JPS636003A	1988-01-12
JPH11228647A	1999-08-24
JPH09208749A	1997-08-12
JP2000143732A	2000-05-26
JPH1036672A	1998-02-10
JPH10251450A	1998-09-22
JPH101565A	1998-01-06

Attorney, Agent or Firm:

Patent business corporation Odashima patent office

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