Methods of making shaped polymeric materials
First Claim
Patent Images
1. A method of making a shaped polymeric material comprising:
- providing a precursor composition comprising(a) at least 10 weight percent polar solvent based on the total weight of the precursor composition; and
(b) no greater than 90 weight percent polymerizable material based on the total weight of the precursor composition, the polymerizable material being capable of free-radical polymerization and having an average number of ethylenically unsaturated groups per monomer molecule equal to at least 1.2, wherein the polymerizable material forms a single phase with the polar solvent and comprises a poly(alkylene oxide(meth)acrylate) having at least 2 (meth)acryloyl groups and having at least 5 alkylene oxide units, the poly(alkylene oxide(meth)acrylate) having a weight average molecular weight less than 2,000 g/mole;
providing a mold having at least two separate wells;
adding the precursor composition to the mold, the precursor composition being positioned in the at least two separate wells;
exposing the precursor composition positioned in the at least two separate wells to radiation to at least partially polymerize the polymerizable material and to form a first swollen shaped polymeric material; and
further comprising removing at least a portion of the polar solvent from the first swollen shaped polymeric material to form a dried shaped polymeric material, and contacting the dried shaped polymeric material with a sorbate for a time sufficient for the dried shaped polymeric material to sorb at least a portion of the sorbate to form a second swollen shaped polymeric material, wherein the sorbate comprises at least one active agent.
1 Assignment
0 Petitions
Accused Products
Abstract
The present disclosure describes methods for making shaped polymeric materials. Methods are provided for making shaped polymeric materials from a precursor composition that contains a polar solvent and a polymerizable material that is miscible with the polar solvent. The precursor composition is at least partially polymerized in a mold.
-
Citations
10 Claims
-
1. A method of making a shaped polymeric material comprising:
-
providing a precursor composition comprising (a) at least 10 weight percent polar solvent based on the total weight of the precursor composition; and (b) no greater than 90 weight percent polymerizable material based on the total weight of the precursor composition, the polymerizable material being capable of free-radical polymerization and having an average number of ethylenically unsaturated groups per monomer molecule equal to at least 1.2, wherein the polymerizable material forms a single phase with the polar solvent and comprises a poly(alkylene oxide(meth)acrylate) having at least 2 (meth)acryloyl groups and having at least 5 alkylene oxide units, the poly(alkylene oxide(meth)acrylate) having a weight average molecular weight less than 2,000 g/mole; providing a mold having at least two separate wells; adding the precursor composition to the mold, the precursor composition being positioned in the at least two separate wells; exposing the precursor composition positioned in the at least two separate wells to radiation to at least partially polymerize the polymerizable material and to form a first swollen shaped polymeric material; and further comprising removing at least a portion of the polar solvent from the first swollen shaped polymeric material to form a dried shaped polymeric material, and contacting the dried shaped polymeric material with a sorbate for a time sufficient for the dried shaped polymeric material to sorb at least a portion of the sorbate to form a second swollen shaped polymeric material, wherein the sorbate comprises at least one active agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification