Adhesive skin barrier composition for ostomy appliance
AssigneeHollister Incorporated
InventorEmil Stempel
Life of this patent
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Abstract
A pressure sensitive adhesive composition particularly suitable for use as a protective skin barrier material for sealing the faceplate of an ostomy appliance, such as the faceplate of a one-piece or two-piece urostomy or an ileostomy appliance, to skin surfaces surrounding a patient's stoma. The composition includes a blend of two viscoelastic adhesive elastomers, specifically, high molecular weight polyisobutylene and a styrene block copolymer, which, along with a plasticizer (preferably petrolatum) and a suitable tackifier and antioxidant, form a continuous phase in which hydrocolloids such as sodium carboxymethylcellulose and pectin are dispersed. The composition is exceptional for its durability, flexibility and strength, even when saturated, and for its controlled swelling upon hydration.
Claims12
A pressure-sensitive adhesive skin barrier composition particularly suitable for use in sealing the faceplate of an ostomy appliance to skin surfaces surrounding a patient's stoma, consisting essentially of a substantially homogeneous mixture on a percent weight basis of an elastomer blend essentially composed of about 2 percent to about 15 percent of one or more high molecular weight polyisobutylenes and about 5 percent to about 20 percent of one or more styrene block copolymers, said one or more polyisobutylenes of said blend being only of a viscosity average molecular weight within the range of about 750,000 to about 2,350,000;
- about 6 percent to about 20 percent of hydrocarbon plasticizer selected from the group consisting of petrolatum and mineral oil;
- about 10 percent to about 35 percent tackifier;
- up to about 1 percent antioxidant;
- and about 35 percent to about 65 percent water-absorbing hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, and mixtures thereof, and optionally including minor amounts of other hydrocolloid gums.
A pressure-sensitive adhesive skin barrier composition particularly suitable for use in sealing the faceplate of an ostomy appliance to skin surfaces surrounding a patient's stoma, consisting essentially of a substantially homogeneous mixture on a percent weight basis of an elastomer blend essentially composed of about 3 percent to about 7 percent of one or more high molecular weight polyisobutylenes and about 7 percent to about 14 percent of one or more styrene block copolymers, said one or more polyisobutylenes of said blend being only of a viscosity average molecular weight within the range of 750,000 to about 2,350,000;
- about 8 percent to about 15 percent petrolatum;
- about 20 percent to about 30 percent tackifier;
- up to about 1 percent antioxidant;
- and about 35 percent to about 65 percent water-absorbing hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, and mixtures thereof, and optionally including minor amount of other hydrocolloid gums.
Dependencies are inferred from the claim text.