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US 12,203,012 B2Granted
Stratum corneum-collecting adhesive composition, stratum corneum-collecting instrument, biological substance extraction kit, and biological substance collection method
AssigneeShiseido Company, Ltd.
InventorsChika Tanaka, Tomoko Onodera, Masaya Takagi, Chieko Mizumoto, Daisuke Kubota, Masahiko Yano
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Abstract
A stratum corneum-collecting adhesive composition includes a hydrophobic component having adhesiveness, and a hydrophilic component that is present in a dispersed state in the hydrophobic component.
Claims15
A stratum corneum-collecting adhesive composition comprising:
- a hydrophobic component having adhesiveness;
- a hydrophilic component that is present in a dispersed state in the hydrophobic component,
- wherein a content by percentage of the hydrophilic component is from 15 to 50% by mass to a mass of the adhesive composition,
- wherein a content by percentage of the hydrophobic component is from 50 to 85% by mass to the mass of the adhesive composition,
- wherein the hydrophobic component contains a tackifier in an amount of from 10 to 50% by mass to the mass of the adhesive composition, a shape retention agent in an amount of from 5 to 50% by mass to the mass of the adhesive composition, and a softener in an amount of from 3 to 20% by mass to the mass of the adhesive composition, and
- wherein the hydrophilic component contains at least one selected from the group consisting of water-soluble carboxymethyl cellulose and salts thereof, water-insoluble carboxymethyl cellulose and salts thereof, alginic acid and salts thereof, vinyl acetate/vinylpyrrolidone copolymer, polyvinylpyrrolidone, and polyvinylpolypyrrolidone.
3 more elements
Dependencies are inferred from the claim text.