Conjugated diolefin-based copolymer rubber and composition thereof
US6191234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 15, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L19/006
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Conjugated diolefin-based copolymer rubber of a conjugated diolefin and an aromatic vinyl compound, wherein PA1 (1) the content of amino groups bound to the rubber (nitrogen content value) is 0.0025 to 0.20 mmol/g of copolymer rubber, PA1 (2) the content of the polymerization units of the aromatic vinyl compound is 5 wt % or more and less than 30 wt % based on the copolymer rubber, and the content of vinyl bonds in the polymerization unit of the conjugated diolefin (the total content of a 1,2-bond and a 3,4-bond) is 55 mol % or more based on the polymerization unit of the conjugated diolefin, or the content of the polymerization units of the aromatic vinyl compound is 30 to 50 wt % based on the copolymer rubber and the content of vinyl bonds in the polymerization unit of the conjugated diolefin is 25 to 55 mol % on the polymerization unit of the conjugated diolefin and PA1 (3) the molecular weight distribution is polymodal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.