Devices using silicone pressure sensitive adhesives containing organic wax
First Claim
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1. A matrix transdermal drug delivery device for a bioactive agent, comprising:
- (a) a backing substrate;
(b) an adhesive matrix atop at least portions of said backing substrate, said adhesive matrix formed of a non-flammable, hot-melt, silicone pressure sensitive adhesive composition having tackiness and adhesiveness containing (i) between about 30 and about 70 percent by weight of a benzene-soluble resinous copolymer containing silicon-bonded hydroxyl radicals and consisting essentially of triorganosiloxy units of the formula R3 SiO1/2 and tetra functional siloxy units of the formula SiO4/2 in a ratio of about 0.6 to 0.9 triorganosiloxy units for each tetra functional siloxy unit present in the copolymer, wherein each R is a monovalent organic radical independently selected from the group consisting of hydrocarbon radicals of from 1 to 6 inclusive carbon atoms;
(ii) between about 22 and about 60 percent by weight of a polydimethylsiloxane fluid; and
(iii) between about 1.0 and about 25 percent by weight of an organic wax, all weight percents being based on total composition weight, said wax having a melting point of between about 30°
C. and about 150°
C., and said organic wax decreasing the dynamic viscosity of the resultant hot-melt silicone pressure sensitive adhesive at temperatures ranging up to about 200°
C., and said silicone pressure sensitive adhesive composition including ingredients selected from the group consisting of drugs, excipients, co-solvents, enhancers, and mixtures thereof where the silicone pressure sensitive adhesive composition is compatible with said drugs, excipients, co-solvents and enhancers wherein the silicone pressure sensitive adhesive composition has a tack value between about 50 and 800 g/cm2 measured using a probe tack tester at a speed of 0.5 cm/second with a 0.5 second dwell time; and
(c) a release liner contacted on the adhesive matrix.
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Abstract
Hot-melt silicone pressure sensitive adhesive compositions containing organic waxes, methods of using the compositions and devices made using the compositions are disclosed. The hot-melt silicone pressure sensitive adhesive compositions include a mixture of (i) a silicate resin, (ii) a silicone fluid, and (iii) an organic wax having a melting point of between 30° C. and 150° C. The organic wax decreases dynamic viscosity of the adhesive at temperatures equal to or below about 200° C.
28 Citations
13 Claims
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1. A matrix transdermal drug delivery device for a bioactive agent, comprising:
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(a) a backing substrate; (b) an adhesive matrix atop at least portions of said backing substrate, said adhesive matrix formed of a non-flammable, hot-melt, silicone pressure sensitive adhesive composition having tackiness and adhesiveness containing (i) between about 30 and about 70 percent by weight of a benzene-soluble resinous copolymer containing silicon-bonded hydroxyl radicals and consisting essentially of triorganosiloxy units of the formula R3 SiO1/2 and tetra functional siloxy units of the formula SiO4/2 in a ratio of about 0.6 to 0.9 triorganosiloxy units for each tetra functional siloxy unit present in the copolymer, wherein each R is a monovalent organic radical independently selected from the group consisting of hydrocarbon radicals of from 1 to 6 inclusive carbon atoms;
(ii) between about 22 and about 60 percent by weight of a polydimethylsiloxane fluid; and
(iii) between about 1.0 and about 25 percent by weight of an organic wax, all weight percents being based on total composition weight, said wax having a melting point of between about 30°
C. and about 150°
C., and said organic wax decreasing the dynamic viscosity of the resultant hot-melt silicone pressure sensitive adhesive at temperatures ranging up to about 200°
C., and said silicone pressure sensitive adhesive composition including ingredients selected from the group consisting of drugs, excipients, co-solvents, enhancers, and mixtures thereof where the silicone pressure sensitive adhesive composition is compatible with said drugs, excipients, co-solvents and enhancers wherein the silicone pressure sensitive adhesive composition has a tack value between about 50 and 800 g/cm2 measured using a probe tack tester at a speed of 0.5 cm/second with a 0.5 second dwell time; and(c) a release liner contacted on the adhesive matrix. - View Dependent Claims (3, 4, 5, 9)
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2. A reservoir transdermal drug delivery device, comprising:
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(a) a backing substrate; (b) a reservoir attached to at least portions of the backing substrate, said reservoir containing compositions selected from the group consisting of drugs, excipients, co-solvents, enhancers, and mixtures thereof; (c) a non-flammable hot-melt silicone pressure sensitive adhesive composition having tackiness and adhesiveness containing (i) between about 30 and about 70 percent by weight of a benzene-soluble resinous copolymer containing silicon-bonded hydroxyl radicals and consisting essentially of triorganosiloxy units of the formula R3 SiO1/2 and tetra functional siloxy units of the formula SiO4/2 in a ratio of about 0.6 to 0.9 triorganosiloxy units for each tetra functional siloxy unit present in the copolymer, wherein each R is a monovalent organic radical independently selected from the group consisting of hydrocarbon radicals of from 1 to 6 inclusive carbon atoms;
(ii) between about 22 and about 60 percent by weight polydimethylsiloxane fluid; and
(iii) between about 1.0 and about 25 percent by weight of an organic wax, all weight percents being based on total composition weight, said wax having a melting point of between about 30°
C. and about 150°
C., and said wax decreasing dynamic viscosity of the hot-melt silicone pressure sensitive adhesive at temperatures ranging up to about 200°
C., wherein the silicone pressure sensitive adhesive composition has a tack value between about 50 and 800 g/cm2 measured using a probe tack tester at a speed of 0.5 cm/second with a 0.5 second dwell time, coated on top of the reservoir and portions of the backing substrate not covered by the reservoir; and(d) a release liner attached to the silicone pressure sensitive adhesive. - View Dependent Claims (6, 7, 8, 10)
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11. A matrix transdermal drug delivery device for a bioactive agent, comprising:
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(a) a backing substrate; (b) an adhesive matrix atop at least portions of said backing substrate, said adhesive matrix formed of a non-flammable, hot-melt, silicone pressure sensitive adhesive composition having tackiness and adhesiveness containing (i) between about 30 and about 70 percent by weight of a cohydrolysis product of a trialkyl hydrolyzable silane and an alkyl silicate, wherein the cohydrolysis product contains a plurality of silicon-bonded hydroxy groups, (ii) between about 22 and about 60 percent by weight of a polydimethylsiloxane fluid; and
(iii) between about 1.0 and about 25 percent by weight of an organic wax, all weight percents being based on total composition weight, said wax having a melting point of between about 30°
C. and about 150°
C., and said organic wax decreasing the dynamic viscosity of the resultant hot-melt silicone pressure sensitive adhesive at temperatures ranging up to about 200°
C., and said silicone pressure sensitive adhesive composition including ingredients selected from the group consisting of drugs, excipients, co-solvents, enhancers, and mixtures thereof, wherein the silicone pressure sensitive adhesive composition is compatible with said drugs, excipients, co-solvents and enhancers, and the silicone pressure sensitive adhesive composition has a tack value between about 50 and 800 g/cm2 measured using a probe tack tester at a sped of 0.5 cm/second with a 0.5 second dwell time; and(c) a pressure sensitive adhesive release liner contacting the adhesive matrix. .Iaddend..Iadd.12. The matrix transdermal drug delivery device for a bioreactive agent of claim 11, wherein the organic wax is selected from the group consisting of naturally occurring waxes including carnauba, candelilla, beeswax, paraffin, ozokerite, ceresine, and mixtures thereof. - View Dependent Claims (12)
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13. Iaddend..Iadd.20. The reservoir transdermal drug delivery device of claim 16, wherein the silicone pressure sensitive adhesive composition has an adhesion value between about 100 and 2000 gm/cm determined by first adhering tape having the silicone pressure sensitive adhesive composition thereon to stainless steel using a 4 pound roller and, subsequently, stripping the tape from the stainless steel while pulling at a rate of 12 inches/minute at an angle of 180°
- using a tensile testing machine. .Iaddend.
Specification