Crosslinked, porous polymers for controlled drug delivery
First Claim
1. A controlled-release, drug-delivery carrier composition which comprisesa crosslinked copolymer, capable of swelling in ethanol to give a swollen copolymer containing at least 40% by weight of ethanol, and capable of swelling in water to give a swollen copolymer containing no more than 20% by weight of water, where the % ethanol:
- % water is 2;
1 to 22;
1 respectively, which copolymer is the copolymerization product of(a) 50 to 99% by weight of said copolymer of (aa) a water-insoluble monoolefinic monomer, or mixture of said monomers, or mixture of said monomers with 0 to 45% by weight of total monomers of (bb) a water-soluble monolefinic monomer, or mixture of said water-soluble monomers, with(b) 50 to 1% by weight of said copolymer of a divinyl or polyvinyl crosslinking agent having a molecular weight of 100 to 10,000, but where (b) is not more than 20 mol% of component (a).
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Abstract
A controlled-release, drug-delivery composition which comprises (A) a crosslinked copolymer, capable of swelling in ethanol to give a swollen copolymer containing at least 40% by weight of ethanol, and capable of swelling in water to give a swollen copolymer containing no more than 20% by weight of water, where the swelling ratio (% ethanol: % water) is 2:1 to 22:1, which comprises the copolymerization product of (a) 50 to 99% by weight of said copolymer of a water-insoluble monoolefinic monomer or (a) with 0 to 45% by weight of total monomers of a water-soluble monoolefinic monomer, with (b) 50 to 1% by weight, but not more than 20 mol % of a divinyl or polyvinyl crosslinking agent; and (B) an effective amount of a pharmaceutical medicament is useful for the controlled and prolonged release of drugs when taken orally.
263 Citations
15 Claims
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1. A controlled-release, drug-delivery carrier composition which comprises
a crosslinked copolymer, capable of swelling in ethanol to give a swollen copolymer containing at least 40% by weight of ethanol, and capable of swelling in water to give a swollen copolymer containing no more than 20% by weight of water, where the % ethanol: - % water is 2;
1 to 22;
1 respectively, which copolymer is the copolymerization product of(a) 50 to 99% by weight of said copolymer of (aa) a water-insoluble monoolefinic monomer, or mixture of said monomers, or mixture of said monomers with 0 to 45% by weight of total monomers of (bb) a water-soluble monolefinic monomer, or mixture of said water-soluble monomers, with (b) 50 to 1% by weight of said copolymer of a divinyl or polyvinyl crosslinking agent having a molecular weight of 100 to 10,000, but where (b) is not more than 20 mol% of component (a). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- % water is 2;
Specification