Method for manufacturing copolymer and rubber composition containing the same
US10654957B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Jul 24, 2018 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Oct 24, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
According to an embodiment of the present invention, there is provided a method of preparing a copolymer which includes (a) polymerizing an aromatic vinyl monomer and a conjugated diene-based monomer in the presence of a solvent, a first randomizing agent, and a catalyst to prepare a first copolymer including the aromatic vinyl monomer in an amount of 15 to 40 wt %; and (b) reacting the first copolymer with one or more of a second randomizing agent different from the first randomizing agent and an additional aromatic vinyl monomer to prepare a second copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.