Liquid hydrocarbon-based copolymers bearing two cyclocarbonate ester end groups
US11414516B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Oct 1, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/75
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
1) Hydrocarbon-based copolymer comprising two end groups preceded by an ester function and chosen from a 2-oxo-1,3-dioxolan-4-yl (or cyclocarbonate), a dithiocyclocarbonate, an exo-vinylene cyclocarbonate and a 2-oxo-1,3-dioxolen-4-yl, the main chain of which comprises units (I) and (II)in which R0 is notably a methyl radical;and the number-average molecular mass Mn of which is between 400 and 100 000 g/mol.2) Process for preparing said copolymer, comprising:(i) a step of heating a statistical bipolymer A chosen from a poly(butadiene-isoprene), a poly(butadiene-myrcene) and a poly(butadiene-farnesene); and then(ii) a step of heating the product formed, in the presence of a chain-transfer agent.3) Use as adhesive, as a mixture with an amine compound comprising at least two amine groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.