Hydrogenated styrene/conjugated diolefin copolymer, foaming material thereof, and application thereof
US11897988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2019 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Mar 6, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2325/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are a hydrogenated styrene/conjugated diolefin copolymer, a foaming material thereof, and application thereof. The copolymer contains a styrene structure unit and a hydrogenated conjugated diolefin structure unit; by taking the total content of the copolymer as a reference, the content of the styrene structure unit is 15-50 wt %, the content of 1,2-polymerization structure unit in the hydrogenated conjugated diolefin structure unit is 8-32%, the degree of randomness of the styrene structure unit in the hydrogenated conjugated diolefin structure unit is 30-80%, and the degree of hydrogenation of conjugated diolefin in the copolymer is 85-100%. The tensile strength at break of the hydrogenated styrene/conjugated diolefin copolymer is 30-60 MPa, the elongation at break is 300-600%, and the hardness (Shore A) is 70-98. Moreover, a foaming body having excellent performance including more than 60% rebound and less than 30% compression deformation can be manufactured by using a supercritical carbon dioxide foaming process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.