HOT-MELT SILICONE BASED OSTOMY AND WOUND CARE SKIN ATTACHMENT ADHESIVES
An ostomy or wound care appliance including an ostomy or wound care device for attachment to the body with an adhesive. The adhesive including a hot-melt silicone pressure sensitive adhesive composition and a reinforcing member.
1 . An ostomy or wound care appliance comprising an ostomy or wound care device for attachment to the body with an adhesive, said adhesive including a hot-melt silicone pressure sensitive adhesive composition and a reinforcing member, wherein said adhesive has the following characteristics:
i. limited cold flow;
ii. tack less than 2000 grams (ASTM D2729; contact force 100 g; contact time 2 seconds; removal speed 0.1 mm/sec);
iii. storage (G′) and loss (G″) modulus between 1.0×10 4 Pa and 5.0×10 6 Pa at 5% strain and a frequency of 1 rad/s at 22° C.
iv. peel strength not less than 2.0 N/in or does not peel cleanly from the substrate (ASTM D3330; stainless steel substrate)
2 . The ostomy or wound care appliance of claim 1 , wherein the said reinforcing member is selected from the group consisting of fibers, meshes, screens, films, particulate fillers, thermoplastic polymers, wicking structures, perforated structures, porous structures, substrates, and combinations thereof.
3 . The ostomy or wound care appliance of claim 2 , wherein said fibers include natural or synthetic fibers such as cellulose, alginates, chitosan and its derivatives, rayon, polyesters, polyacrylonitriles, polyolefins, polyamides, polyurethanes, glass, and combinations thereof.
4 . The ostomy or wound care appliance of claim 2 , wherein said meshes and screens include natural or synthetic materials, and combinations thereof.
5 . The ostomy or wound care appliance of claim 2 , wherein the said films include materials from natural or synthetic origin such as cellulose, alginates, chitosan and its derivatives, polyesters, polyacrylonitriles, polyolefins, diene elastomers, polyamides, polyurethanes, polyethers, polyvinyl alcohol, polyether block amides, polyimides, silicones, polyacrylates, polymethacrylates, ionomers, polyvinylacetate and its copolymers, polyvinylchloride, polyvinylidene chloride, fluorinated polymers, and combinations thereof.
6 . The ostomy or wound care appliance of claim 2 , wherein the said particulate fillers include inorganic fillers such as talc, kaolin, silicas, silicates, borates, phosphates, nanoclays, calcium carbonate, alumina, laponite, zinc oxide, titanium dioxide, and combinations thereof.
7 . The ostomy or wound care appliance of claim 2 , wherein said particulate fillers include organic fillers such as hydrocolloids, proteins, latexes, waxes, superabsorbents, crosslinked polymers, and combinations thereof.
8 . The ostomy or wound care appliance of claim 2 , wherein the thermoplastic polymers include poly(vinyl-2-pyrrolidone) and its copolymers, polyvinyl ethers, polyureas, polyurethanes, silicone copolymers, polyethers, polyether block amides, polyamides, polyimides, polyesters, polyacrylonitriles, polyolefins, polyvinyl alcohol, vinlyaromatic block copolymers, polyacrylates, polymethacrylates, ionomers, polyvinyl chloride, polyvinylidene chloride, polyacrylic acid and its copolymers, polyvinyl acetate and its copolymers, ionomers, and combinations thereof.
9 . The ostomy or wound care appliance of claim 1 , wherein the said hot-melt silicone pressure sensitive adhesive composition further includes additives such as tackifiers, plasticizers, waxes, and combinations thereof.
10 . The ostomy or wound care appliance of claim 2 , wherein the said wicking structures include nanotubes, fibers, surfactant-treated surfaces, and combinations thereof.
11 . The ostomy or wound care appliance of claim 2 , wherein the said perforated structures include those created by printing processes such as stencil, screen, gravure, or offset, by coating processes such as spray or zone, by mechanical processes such as die-cutting or punching, and combinations thereof.
12 . The ostomy or wound care appliance of claim 2 , wherein said porous structures include those created by incorporating hollow polymer spheres, spheres filled with gas or liquid, processes known to produce open and close-celled foam, and combinations thereof.
13 . The ostomy or wound care appliance of claim 2 , wherein said substrates include foams, woven fabrics, nonwoven fabrics, elastomers, and combinations thereof.
14 . The ostomy or wound care appliance of claim 13 , wherein the said foams include polyolefins, copolymers of vinyl acetate, silicones, polyurethanes, and combinations thereof.
15 . The ostomy or wound care appliance of claim 13 , wherein the said woven or non-woven fabrics include any of the components of the fibers cited above.
16 . The ostomy or wound care appliance of claim 13 , wherein the said elastomers include silicones, polyphosphazenes, polyolefins, diene elastomers, polyurethanes, vinylaromatic block copolymers, polyether block amides, polyacrylates, polymethacrylates, and combinations thereof.
17 . The ostomy or wound care appliance of claim 1 , wherein the said hot-melt silicone pressure sensitive adhesive composition further includes additives such as tackifiers, plasticizers, waxes, and combinations thereof
18 . The ostomy or wound care appliance of claim 1 , wherein the said hot-melt silicone pressure sensitive adhesive composition is coated on the reinforcing member as a continuous or discontinuous coating, and combinations thereof.
19 . The ostomy or wound care appliance of claim 1 , wherein the said hot-melt silicone pressure sensitive adhesive composition is coated on said reinforcing member as a pattern coating.
20 . The ostomy or wound care appliance of claim 1 , wherein the said hot-melt silicone pressure sensitive adhesive composition further includes a component for wet-surface adhesion such as a mucoadhesive component.
21 . The ostomy or wound care appliance of claim 20 , wherein the mucoadhesive component includes thiols, dihydroxyphenylalanine, polypeptides, amino acids, or combinations thereof.