Vinyl modifier composition and processes for utilizing such composition
AssigneeBridgestone Corporation
InventorsTerrence E. Hogan, Waruna C. B. Kiridena
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Abstract
An oxolanyl compound-containing composition comprising specified amounts of the meso-isomer of one or more of the oxolanyl compounds of specified structure is provided. Also provided are methods for the use of such compositions as vinyl content modifiers in polymerization processes.
Claims23
A polymerization process comprising the step of polymerizing at least one conjugated diene monomer in the presence of an anionic initiator and a composition comprising at least one oxolanyl compound selected from the group consisting of:
- wherein R1 and R2 independently are hydrogen or an alkyl group and the total number of carbon atoms in —CR1R2— ranges between one and nine inclusive;
- R3, R4 and R5 independently are —H or —CnH2n+1 wherein n=1 to 6,
- wherein at least 60% by weight of the least one oxolanyl compound comprises meso-isomer and
- the process produces a polydiene polymer having a vinyl microstructure content of at least about 20%.
A polymerization process comprising the step of polymerizing at least one conjugated diene monomer in the presence of an anionic initiator and a composition comprising 2,2-di(2-tetrahydrofuryl)propane, wherein at least 60% by weight of the 2,2-di(2-tetrahydrofuryl)propane comprises meso-isomer and the process produces a polydiene polymer having a vinyl microstructure content of at least 20%.
Dependencies are inferred from the claim text.