Hydrogel composition
AssigneeKao Corporation
InventorKenichi KAKINUKI
Life of this patent
Estimating the term…
Abstract
The present invention relates to a hydrogel composition having excellent gel stability while exerting excellent feeling of use. That is, the present invention relates to a hydrogel composition comprising components (A) to (D) below: (A) water in an amount of 50 mass % or more and 90 mass % or less; (B) an anionic water-soluble polymer compound comprising 80 mass % or more of carboxymethylcellulose or a salt thereof; (C) a crosslinking agent that forms ionic crosslinking with an anionic functional group; and (D) a nonionic water-soluble polymer compound, in an amount of 2.5 mass % or more and 8 mass % or less, represented by formula (1) below:
Claims15
A hydrogel composition, comprising components (A) to (D) below:
- (A) water in an amount of 50 mass % or more and 95 mass % or less;
- (B) an anionic water-soluble polymer compound comprising 80 mass % or more of carboxymethylcellulose or a salt thereof;
- (C) a crosslinking agent that forms ionic crosslinking with an anionic functional group;
- and
- (D) a nonionic water-soluble polymer compound, in an amount of 2.5 mass % or more and 8 mass % or less, represented by formula (1) below:
- where R denotes —OH, —NX2, OCH3, —NHCOCH3, or —NCH3COCH3,
- X if present denotes —CH3 or a hydrogen atom, and
- n is a numerical value from 200 to 500,000.
A method for producing a hydrogel composition, comprising:
- mixing components (A) to (D) below to prepare an uncrosslinked gel stock solution:
- (A) water in an amount of 50 mass % or more and 95 mass % or less;
- (B) an anionic water-soluble polymer compound comprising 80 mass % or more of carboxymethylcellulose or a salt thereof;
- (C) a crosslinking agent that forms ionic crosslinking with an anionic functional group;
- and
- (D) a nonionic water-soluble polymer compound, in an amount of 2.5 mass % or more and 8 mass % or less, represented by formula (1) below:
- where R denotes —OH, —NX2, OCH3, —NHCOCH3, or —NCH3COCH3,
- X if present denotes —CH3 or a hydrogen atom, and
- n is a numerical value from 200 to 500,000;
- and
- subsequently sandwiching the uncrosslinked gel stock solution between a first peelable film and a second peelable film or a base material layer thereby making the uncrosslinked gel stock solution into a sheet.
Dependencies are inferred from the claim text.