Process for polymerizing conjugated diene monomers
Abstract
Abstract CONJUGATED DIENES ARE POLYMERIZED BY A NEW CATALYST SYSTEM WHICH PERMITS CONTROL OF THE MOLECULAR WEIGHT AND GIVES A MORE EASILY PROCESSED PRODUCT. THIS CATALYST SYSTEM COMPRISES (1) A LITHIUM ALLYL COMPOUND HAVING 3-10 CARBON ATOMS, AND (2) A SODIUM OXYHYDROCARBON COMPOUND OF 1-10 CARBON ATOMS IN WHICH THE HYDROCARBON PORTION CAN BE A TERTIARY ALKYL RADICAL, BUT IS PREFERABLY A SECONDARY ALKYL RADICAL, OR A POTASSIUM TERTIARY ALKOXIDE OF 4-10 CARBON ATOMS. THE DIENE POLYMERS PRODUCED BY THIS PROCESS HAVE CONTROLLABLE MOLECULAR WEIGHTS IN THE RANGE OF 5,000 TO 1,000,000, PREFERABLY 100,000 TO 500,000, BROAD MOLECULAR WEIGHT DISTRIBUTION, HIGH GLASS TRANSITION TEMPERATURES, HIGH DEGREE OF BRANCHING AND ARE MORE EASILY PROCESSED IN THE PRODUCTION OF RUBBER AND OTHER COMPOSITIONS FOR COMMERCIAL USE.
Inventors
- 👤 A Halasa
Bibliographic Details
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