Polymeric fibers and methods of making
First Claim
Patent Images
1. A method of making a polymeric fiber, the method comprising:
- providing a precursor composition comprising;
a) at least 5 weight percent polar solvent based on a total weight of the precursor composition, wherein the polar solvent comprises water and is not reactive in the precursor composition; and
b) polymerizable material capable of free-radical polymerization and having an average number of ethylenically unsaturated groups per monomer molecule greater than 1.0, wherein the polymerizable material is miscible with the polar solvent;
forming a stream of the precursor composition; and
exposing the stream to radiation for a time sufficient to at least partially polymerize the polymerizable material and to form a first swollen polymeric fiber having an aspect ratio greater than 3;
1, wherein the first swollen polymeric fiber is a hydrogel swollen with the polar solvent.
1 Assignment
0 Petitions
Accused Products
Abstract
Polymeric fibers and methods of making the polymeric fibers are described. The polymeric fibers are crosslinked hydrogels or dried hydrogels that are prepared from a precursor composition that contains polymerizable material having an average number of ethylenically unsaturated groups per monomer molecule greater than 1.0. The polymeric fibers can contain an optional active agent.
-
Citations
24 Claims
-
1. A method of making a polymeric fiber, the method comprising:
-
providing a precursor composition comprising; a) at least 5 weight percent polar solvent based on a total weight of the precursor composition, wherein the polar solvent comprises water and is not reactive in the precursor composition; and b) polymerizable material capable of free-radical polymerization and having an average number of ethylenically unsaturated groups per monomer molecule greater than 1.0, wherein the polymerizable material is miscible with the polar solvent; forming a stream of the precursor composition; and exposing the stream to radiation for a time sufficient to at least partially polymerize the polymerizable material and to form a first swollen polymeric fiber having an aspect ratio greater than 3;
1, wherein the first swollen polymeric fiber is a hydrogel swollen with the polar solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 22)
-
-
10. A method of preparing an article comprising a polymeric fiber, the method comprising:
-
providing a precursor composition comprising a) 5 weight percent to 85 weight percent polar solvent based on a total weight of the precursor composition, wherein the polar solvent comprises water is not reactive in the precursor composition; and b) 15 weight percent to 95 weight percent polymerizable material based on the total weight of the precursor composition, the polymerizable material being capable of free-radical polymerization and being miscible in the polar solvent, the polymerizable material comprising a poly(alkylene oxide (meth)acrylate) having at least 2 (meth)acryloyl functionality groups and having at least 5 alkylene oxide units; and forming a stream of the precursor composition; and exposing the stream to radiation for a time sufficient to at least partially polymerize the polymerizable material and to form a first swollen fiber having an aspect ratio greater than 3;
1, wherein the first swollen fiber is a hydrogel swollen with the polar solvent. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 23)
-
-
20. An article comprising a polymeric fiber having an aspect ratio greater than 3:
- 1, the polymeric fiber comprising a free-radical polymerization reaction product of a precursor composition comprising
a) 5 weight percent to 85 weight percent polar solvent based on a total weight of the precursor composition, wherein the polar solvent comprises water and is not reactive in the precursor composition; and b) 15 weight percent to 95 weight percent polymerizable material based on the total weight of the precursor composition, the polymerizable material being capable of free-radical polymerization and being miscible in the polar solvent, the polymerizable material comprising a poly(alkylene oxide (meth)acrylate) having at least 2 (meth)acryloyl groups and having at least 5 alkylene oxide units, wherein the polymeric fiber is a hydrogel or a dried hydrogel. - View Dependent Claims (24)
- 1, the polymeric fiber comprising a free-radical polymerization reaction product of a precursor composition comprising
-
21. An article comprising a polymeric fiber having an aspect ratio greater than 3:
- 1, the polymeric fiber comprising;
a) a free-radical polymerization reaction product of a precursor composition comprising polymerizable material being capable of free-radical polymerization, the polymerizable material comprising a poly(alkylene oxide (meth)acrylate) having at least 2 (meth)acryloyl groups and having at least 5 alkylene oxide units; and b) an active agent.
- 1, the polymeric fiber comprising;
Specification