Vinyl modifier composition and processes for utilizing such composition
AssigneeBridgestone Corporation
InventorsTerrence E. Hogan, Waruna 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. Formula (I)
Claims25
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, and wherein the composition comprises at least 52% by weight of the meso-isomer of the at least one oxolanyl compound.
A polymerization process comprising the step of polymerizing at least one conjugated diene monomer in the presence of 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 —CbH2n+1 wherein n=1 to 6, wherein the composition comprises at least 52% by weight of the meso-isomer of the at least one oxolanyl compound, and wherein the process produces a polydiene polymer.
A polymerization process comprising polymerizing 1,3-butadiene in the presence of the oxolanyl compound 2,2-di(2-tetrahydrofuryl)propane wherein
- said oxolanyl compound comprises at least 52% by weight of the meso-isomer,
- the process produces a polydiene polymer with a vinyl content between 10 and 65%,
- the process includes the use of an organolithium anionic initiator, and
- the polymerization process is conducted so that the peak polymerization temperature is between 85° C. and 120° C.
Dependencies are inferred from the claim text.