Process for polymerizing conjugated dienes
Abstract
Abstract CONJUGATED DINES ARE POLYMERIZED BY A NEW CATALYST SYSTEM WHICH IS MORE ECONOMICALLY AND MORE EASILY PREPARED AND USED THAN PRESENT CATALYST SYSTEMS USED FOR SIMILAR PURPOSE. THIS CATALYST SYSTEM COMPRISES A COMBINATION OF A FREE RADICAL ANION COMPONENT MODIFIED BY AN ALKALI METAL ALKOXIDE OR ARYLOXIDE. THE FREE RADICAL ANIONIC COMPONENT IS MADE, IN AN APPROPRIATE SOLVENT, FROM AN ALKALI METAL AND AN ANION FORMING COMPOUND SUCH AS NAPHTHALENE. THE ALKALI METAL COMPOUND IS PREFERABLY POTASSIUM ALKOXIDE OR ARYLOXIDE, BUT CAN ALSO BE OTHER ALKALI METAL ALKOXIDES OR ARYLOXIDES. THE CATALYST SYSTEM IS USED TO POLYMERIZE CONJUGATED DIENES TO POLYMER PRODUCTS OF CONTROLLED MOLECULAR WEIGH, SUITABLE FOR EASY PROCESSING AND HAVING PROPERTIES DESIRABLE FOR ULTIMATE USE IN TIRES AND OTHER MOLDED PRODUCTS. THE MOLECULAR WEIGHTS OF THE PRODUCTS ARE INCREASED BY VIRTUE OF THE MODIFIER AS COMPARED TO THE MOLECULAR WEIGHTS OBTAINED WITH THE RADICAL ANION COMPONENT ALONE.
Inventors
- 👤 Tai Chun Cheng
- 👤 Thomas A Antkowiak
- 👤 Adel F Halasa
Bibliographic Details
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