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US 10,500,302 B2Granted
Medical articles and methods of making using miscible composition
Assignee3M Innovative Properties Company
InventorsDavid R. Holm, Dong-Wei Zhu
Life of this patent
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Abstract
Methods of improving the moisture vapor transmission rate of a pressure sensitive adhesive layer in a medical article with a miscible composition, as well as medical articles including the improved pressure sensitive adhesive layer.
Claims13
A method of increasing moisture vapor transmission of an adhesive layer in a medical article, the method comprising:
- providing a PSA composition comprising a combination of hydrophilic polymer components and acid functional groups, the combination being greater than 15 wt %;
- wherein the hydrophilic polymer components are greater than 3 wt % and less than 30 wt %;
- wherein the acid functional groups are greater than 6 wt %, wherein all weight percentages are based on total weight of the PSA composition;
- forming a PSA layer from the PSA composition;
- providing an MVTR-modifying composition comprising an organic base, wherein the MVTR-modifying composition is not mixed within the PSA composition, but is miscible with the PSA composition;
- forming an MVTR-modifying layer from the MVTR-modifying composition;
- and
- placing the MVTR-modifying layer proximate the PSA layer under conditions effective for at least a portion of the MVTR-modifying composition to penetrate into the PSA composition to form a non-uniform dispersion throughout the PSA layer;
- wherein contact between the MVTR-modifying composition and the PSA composition causes an acid-base reaction to form a poly-salt and increase moisture permeability of at least a portion of the PSA layer.
6 more elements
A method of increasing moisture vapor transmission of an adhesive layer in a medical article, the method comprising:
- providing a PSA composition comprising a combination of hydrophilic polymer components and acid functional groups, the combination being greater than 15 wt %;
- wherein the hydrophilic polymer components are greater than 3 wt % and less than 30 wt %;
- wherein the acid functional groups are greater than 6 wt %, wherein all weight percentages are based on total weight of the PSA composition;
- forming a PSA layer from the PSA composition;
- providing an MVTR-modifying composition comprising an organic base, wherein the MVTR-modifying composition is not mixed within the PSA composition, but is miscible with the PSA composition;
- forming an MVTR-modifying layer from the MVTR-modifying composition;
- wherein forming an MVTR-modifying layer comprises:
- providing a scaffold;
- and
- coating the scaffold with the MVTR-modifying composition to form the MVTR-modifying layer;
- and
- placing the MVTR-modifying layer proximate the PSA layer.
9 more elements
Dependencies are inferred from the claim text.