Olefin block copolymer and preparation method thereof
US9527946B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Jul 9, 2015 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Jul 9, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an α-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.