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US 11,236,197 B2Granted
Multi-block copolymers
AssigneeIP2Ipo Innovations Limited
InventorsCharlotte Katherine Williams, Yunqing Zhu
Life of this patent
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Abstract
The present invention provides a multi-block copolymer comprising at least blocks A-B-A or B-A-B, wherein block A comprises a polyester formed by polymerisation of a lactone and/or a lactide; and block B comprises a copolyester formed by polymerisation of an epoxide and an anhydride, or a polycarbonate formed by polymerisation of an epoxide and carbon dioxide, and methods of production thereof.
Claims18
A multi-block copolymer comprising blocks A-B-A, wherein block A comprises a polyester formed by polymerisation of ϵ-decalactone;
- and block B comprises a copolyester formed by polymerisation of (1) cyclohexene oxide or 4-vinyl-1-cyclohexene-1,2-epoxide and (2) phthalic anhydride, wherein the multi-block copolymer is a triblock copolyester, a pentablock copolyester, or a heptablock copolyester, and wherein the multi-block copolymer comprises urethane linkages.
Dependencies are inferred from the claim text.