Process for controlling degree of branch of high 1,4-cis polybutadiene
US6586542B2 · kind B2 · utility
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6References
8Claims
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Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Sep 12, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F136/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a process of controlling the degree of branch of high 1,4-cis polybutadiene without any alternation in the 1,4-cis content and the polymerization yield, in which a dialkylzinc compound represented by the following formula I is added in a controlled amount as an agent for controlling the degree of branch of high 1,4-cis polybutadiene, thus guaranteeing the optimum processability and physical properties of polymer according to the use purpose.R1—Zn—R2  Formula I wherein R1 and R2 are same or different and include an alkyl group containing 1 to 5 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.