Preparation of functional gel particles with a dual crosslink network
First Claim
1. A gel particle comprising a polymeric network comprising:
- vinyl monomeric units;
at least one first divinyl monomeric unit, wherein the vinyl groups are connected by a chemically stable linking group which comprises a functionality that degrades in a predetermined chemical or predetermined biological environment over a time period of 7 days to 30 days; and
at least one second divinyl monomeric unit, wherein the vinyl groups are connected by a cleavable linking group,wherein the polymeric network is formed by a controlled polymerization process and wherein the first divinyl monomeric unit forms chemically stable crosslinks within the polymeric network and the second divinyl monomeric unit forms cleavable crosslinks within the polymeric network; and
wherein the gel particle has a diameter of from 5 nm to 500 nm.
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Abstract
Functional gel particle formed from a crosslinked polymeric network including a fraction of stable crosslinks and a second fraction of cleavable crosslinks are disclosed. Functional compounds may be chemically or physically encapsulated within and/or released from the gel particle by selective cleavage of the cleavable crosslinks. The functional compounds may be delivered and released to a pre-selected target site. Peripheral or other accessible functionality on the surface of the gel particle allows attachment of a surface reactive agent, thereby modifying one or more surface properties of the gel particle. Processes of preparing the gel particles and processes of delivering the functional compounds to a target site are also disclosed.
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Citations
29 Claims
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1. A gel particle comprising a polymeric network comprising:
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vinyl monomeric units; at least one first divinyl monomeric unit, wherein the vinyl groups are connected by a chemically stable linking group which comprises a functionality that degrades in a predetermined chemical or predetermined biological environment over a time period of 7 days to 30 days; and at least one second divinyl monomeric unit, wherein the vinyl groups are connected by a cleavable linking group, wherein the polymeric network is formed by a controlled polymerization process and wherein the first divinyl monomeric unit forms chemically stable crosslinks within the polymeric network and the second divinyl monomeric unit forms cleavable crosslinks within the polymeric network; and wherein the gel particle has a diameter of from 5 nm to 500 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 27, 28, 29)
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22. A process for preparing a gel particle comprising:
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polymerizing by a controlled polymerization process in a biphasic medium a composition comprising; vinyl monomeric units; at least one first divinyl monomeric unit, wherein the vinyl groups are connected by a chemically stable linking group which comprises a functionality that degrades in a predetermined chemical or predetermined biological environment over a time period of 7 days to 30 days; and at least one second divinyl monomeric unit, wherein the vinyl groups are connected by a cleavable linking group; and forming a polymeric network comprising chemically stable crosslinks and cleavable crosslinks;
wherein the gel panicle has a diameter of from 5 nm to 500 nm. - View Dependent Claims (23, 24, 25, 26)
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Specification