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Patent Searching and Data


Title:
PROCESS FOR PREPARING HIGH DIBLOCK CONTENT MULTIBLOCK INTERPOLYMERS VIA CHAIN TRANSFER
Document Type and Number:
WIPO Patent Application WO2002055575
Kind Code:
A8
Abstract:
A process of preparing a diblock/triblock composition in a single reaction vessel includes reacting a first monomer, such as styrene, with a first portion of an anionic catalyst or initiator in a suitable solvent to form a first block of the polymers. A second step includes adding a second portion of the catalyst and a second monomer, such as butadiene. A portion of the resulting living diblock polymer is then terminated by addition of a chain transfer agent, which also forms a second anionic catalyst/initiator. Further sequential additions of the second and first monomers copolymerize with both the remaining living diblock and with the second anionic catalyst to complete the triblock polymer and form a second portion of diblock polymer.

Inventors:
WOLLUM MARK
GRAVES DANIEL
Application Number:
PCT/US2001/049408
Publication Date:
October 10, 2002
Filing Date:
December 18, 2001
Export Citation:
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Assignee:
FIRESTONE POLYMERS LLC (US)
International Classes:
C08F2/38; C08F297/04; C08L53/02; C09J153/02; (IPC1-7): C08F297/04; C08L53/02; C09J153/02; C08F2/38
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