Biodegradable poly(alkylene oxide)-poly(p-dioxanone) block copolymer soluble in organic solvents, and drug delivery composition comprising same
First Claim
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1. A block copolymer comprising one or more poly(alkylene oxide) blocks and one or more blocks of a p-dioxanone homopolymer or copolymer, wherein:
- (a) the block copolymer has a solubility in an organic solvent of 33.3 to 1,000 mg/ml; and
(b) the poly(alkylene oxide) blocks comprise between 25% to 80% by weight of the block copolymer.
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Abstract
The present invention relates to a biocompatible and biodegradable block copolymer of poly(alkylene oxide) and poly(p-dioxanone), which is soluble in organic solvents, and a drug delivery composition comprising the same.
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16 Claims
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1. A block copolymer comprising one or more poly(alkylene oxide) blocks and one or more blocks of a p-dioxanone homopolymer or copolymer, wherein:
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(a) the block copolymer has a solubility in an organic solvent of 33.3 to 1,000 mg/ml; and
(b) the poly(alkylene oxide) blocks comprise between 25% to 80% by weight of the block copolymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A drug formulation for subcutaneous implantation or intravenous injection comprising a bioactive agent delivery composition comprising a block copolymer comprising one or more poly(alkylene oxide) blocks and one or more blocks of a p-dioxanone homopolymer or copolymer, wherein:
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(a) the block copolymer is soluble in an organic solvent; and
(b) the poly(alkylene oxide) blocks comprise between 25 to 85% by weight of the block copolymer;
and a bioactive agent encased therein, wherein said composition is in the form of a microsphere, microcapsule, film, strip, fiber, gel or solution.
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16. A drug formation for subcutaneous implantation or intravenous injection comprising a bioactive agent delivery composition comprising a block copolymer comprising one or more poly(alkylene oxide) blocks and one or more blocks of a p-dioxanone homopolymer or copolymer, wherein:
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(a) the block copolymer is soluble in an organic solvent; and
(b) the poly(alkylene oxide) blocks comprise between 25 to 80% by weight of the block copolymer;
and a bioactive agent encased therein, wherein said composition is in the form of a nanosphere, nanocapsule or polymeric micelle.
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Specification