Copolymer and method of manufacturing the same
US12037448B2 · kind B2 · utility
0Cited by
6References
18Claims
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Key dates
| Filing date | Dec 28, 2020 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Dec 17, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of manufacturing copolymer includes mixing and reacting a polyester, an aliphatic polyol or an aliphatic polyol oligomer, and a first catalyst in a first region of a screw to form a polyester polyol, and side-feeding a lactone or a lactam to a second region of the screw to copolymerize the lactone or a lactam and the polyester polyol to form a copolymer, wherein the first region and the second region are continuous connecting regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.