Hydrogel and uses therefor
AssigneeSekisui Kasei Co., Ltd.
InventorsRyo Akuta, Koichiro Okamoto
Life of this patent
Estimating the term…
Abstract
The present invention relates to a hydrogel and use thereof. More specifically, the present invention relates to a hydrogel comprising water and a polymer matrix, wherein the polymer matrix comprises a copolymer of a monofunctional monomer having a hydrophilic group and one ethylenic unsaturated group, and a polyfunctional monomer having no ester bond, and having an amide group and 3 to 6 ethylenic unsaturated groups, 40 to 95 parts by mass of the water, and 5 to 60 parts by mass of the polymer matrix are contained in 100 parts by mass of the hydrogel, and the hydrogel shows a swelling degree of 650% or less, when the hydrogel is immersed in a 4M aqueous KOH solution under a temperature of 25° C. for 14 days, and use thereof.
Claims7
A hydrogel comprising water, a polymer matrix, and an electrolyte component, wherein
- said polymer matrix comprises a copolymer of a monofunctional monomer having a hydrophilic group and one ethylenic unsaturated group, and a polyfunctional monomer having no ester bond, and having an amide group and 3 to 6 ethylenic unsaturated groups,
- said monofunctional monomer is at least one selected from the group consisting of (meth)acrylic acid, sodium (meth)acrylate, potassium (meth) acrylate, lithium (meth)acrylate, vinylbenzoic acid, sodium vinylbenzoate, potassium vinylbenzoate, lithium vinylbenzoate, vinylacetic acid, sodium vinylacetate, potassium vinylacetate, lithium vinylacetate, vinylsulfonic acid, sodium vinylsulfonate, potassium vinylsulfonate, lithium vinylsulfonate, p-styrenesulfonic acid, sodium p-styrenesulfonate, potassium p-styrenesulfonate, lithium p-styrenesulfonate, allylsulfonic acid, sodium allylsulfonate, potassium allylsulfonate, lithium allylsulfonate, 2-acrylamide-2-methylpropanesulfonic acid, sodium 2-acrylamide-2-methylpropanesulfonate, potassium 2-acrylamide-2-methylpropanesulfonate, and lithium 2-acrylamide-2-methylpropanesulfonate,
- said polyfunctional monomer is at least one selected from the group consisting of N,N′-{[(2-acrylamide-2-[(3-acrylamidopropoxy) methyl]propan-1,3-diyl) bis (oxy)]bis(propan-1,3-diyl)}diacrylamide, N,N′,N″-triacryloyldiethylenetriamine, and N,N′,N″,N′″-tetraacryloyltriethylenetetramine,
- 40 to 95 parts by mass of said water, and 5 to 60 parts by mass of said polymer matrix are contained in 100 parts by mass of said hydrogel,
- said hydrogel shows a swelling degree of 650% or less, when the hydrogel is immersed in a 4M aqueous KOH solution under a temperature of 25° C. for 14 days,
- said electrolyte component is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, lithium hydroxide, rubidium hydroxide, cesium hydroxide, lithium fluoride, lithium chloride, lithium bromide, lithium iodide, sodium chloride, sodium bromide, potassium chloride, potassium bromide, and calcium chloride, and
- said hydrogel does not comprise a gel strength improving agent.
Dependencies are inferred from the claim text.