Controlled release polymeric gels
AssigneeCray Valley USA, LLC
InventorsHerbert Chao, Nan Tian
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Abstract
A controlled continuous release composition, articles comprising the continuous release composition, methods of using the composition, and methods of preparing the composition are disclosed. The composition comprises an elastomeric matrix which is a reaction product of a carboxyl-terminated polymer with a polycarbodiimide and at least one active agent which is released from the matrix into the environment substantially continuously over an extended period of time.
Claims31
A continuous release composition comprising an elastomeric matrix and at least one active agent, the active agent being released from the matrix into the environment substantially continuously over an extended period of time and the said matrix being the reaction product of a carboxyl-terminated polymer with a polycarbodiimide.
Dependencies are inferred from the claim text.