METHODS OF MAKING SHAPED POLYMERIC MATERIALS
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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.
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Citations
29 Claims
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1-14. -14. (canceled)
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15. A method of making a shaped polymeric material comprising:
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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; and 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. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of making a shaped polymeric material comprising:
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providing a precursor composition comprising (a) at least 10 weight percent polar solvent based on the total weight of the precursor composition, wherein the polar solvent comprises water; 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; providing a mold having at least two separate wells; adding the precursor composition to the mold, the precursor composition being positioned in at the least two separate wells; and exposing the precursor composition position 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.
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Specification