Method of preparing adhesive dressings containing a pharmaceutically active ingredient

Claim 1

A method of preparing an adhesive dressing containing an pharmaceutically active ingredient comprising: a) forming a pressure sensitive adhesive mass comprising: i) one or more low molecular weight polyisobutylenes, ii) one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents, and iii) various optical ingredients; b) blending said pressure sensitive adhesive mass from step (a) until homogeneous; c) layering said blended adhesive mass from step (b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin contacting surface and an adjacent strata; d) laminating a flexible backing member to the exposed surface of said adhesive layer from step (c); e) dispersing a pharmaceutically active ingredient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesion layer; f) coating or casting said dispersion from step (e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step (d) and laminating said coated or cast-on second release paper from step (f) to said adhesive layer so that said dispersion of pharmaceutically active ingredient contacts the now exposed surface of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.

Claim 2

A method of preparing an adhesive dressing containing an pharmaceutically active ingredient comprising: a) forming a pressure sensitive adhesive mass comprising: i) one or more low molecular weight polyisobutylenes, ii) one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents, and iii) various optical ingredients; b) blending said pressure sensitive adhesive mass from step (a) until homogeneous; c) layering said blended adhesive mass from step (b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin contacting surface and an adjacent strata; d) laminating a flexible backing member to the exposed surface of said adhesive layer from step (c); e) dispersing a pharmaceutically active ingredient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesion layer; f) coating or casting said dispersion from step (e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step (d) and laminating said coated or cast-on second release paper from step (f) to said adhesive layer so that said dispersion of pharmaceutically active ingredient contacts the now exposed surface of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.

Claim 5

A method of preparing an adhesive dressing containing a pharmaceutically active ingredient comprising: a) forming a pressure sensitive adhesive mass comprising: i) one or more low molecular weight polyisobutylenes and one or more elastomers, ii) one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents, and iii) various optical ingredients; b) blending said pressure sensitive adhesive mass from step (a) until homogeneous; c) layering said blended adhesive mass from step (b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin contacting adhesive surface and an adjacent strata; d) laminating a flexible backing member to the exposed surface of said adhesive layer from step (c); e) dispersing a pharmaceutically active ingredient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesive layer; f) coating or casting said dispersion from step (e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step (d) and laminating said coated or cast-on second release paper from step (f) to said adhesive layer so that said dispersion of pharmaceutically active ingredient contacts the now exposed surface of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.

Claim 6

A method of preparing an adhesive dressing containing a pharmaceutically active ingredient comprising: a) forming a pressure sensitive adhesive mass comprising: i) one or more low molecular weight polyisobutylenes and one or more elastomers, ii) one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents, and iii) various optical ingredients; b) blending said pressure sensitive adhesive mass from step (a) until homogeneous; c) layering said blended adhesive mass from step (b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin contacting adhesive surface and an adjacent strata; d) laminating a flexible backing member to the exposed surface of said adhesive layer from step (c); e) dispersing a pharmaceutically active ingredient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesive layer; f) coating or casting said dispersion from step (e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step (d) and laminating said coated or cast-on second release paper from step (f) to said adhesive layer so that said dispersion of pharmaceutically active ingredient contacts the now exposed surface of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.