Conjugated-diene based copolymer composition, method for preparing the copolymer composition and rubber composition comprising the copolymer composition
US11180642B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2018 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Sep 21, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A conjugated diene-based copolymer composition is provided. The conjugated diene-based copolymer composition includes a first conjugated diene-based copolymer having 20 wt % to 60 wt % of an aromatic vinyl monomer-derived repeating unit, 35 wt % to 75 wt % of a first conjugated diene-based monomer-derived repeating unit, and 1 wt % to 10 wt % of a hydroxyalkyl (meth)acrylate monomer-derived repeating unit. The first conjugated diene-based copolymer has a Mooney viscosity (MV) at 100° C. of 30 to 120. The conjugated diene-based copolymer composition also includes a second conjugated diene-based copolymer having 20 wt % to 60 wt % of an α-methylstyrene monomer-derived repeating unit and 40 wt % to 80 wt % of a second conjugated diene-based monomer-derived repeating unit. The second conjugated copolymer has a Mooney viscosity (MV) at 100° C. of more than 120 and equal to or less than 200. A method for preparing the conjugated diene-based copolymer is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.