Patent ID: 8632802

Claim:
A transdermal drug delivery system comprising a blend of: (a) a polymer composition comprising at least one acrylic-based polymer polymerized with monomers that include: (i) a soft acrylic monomer having a glass transition temperature (T g ) from about −70° C. to about −10° C. in an amount of from 50% to 70% by weight of the acrylic-based polymer; and (ii) a hard acrylic monomer having a glass transition temperature (T g ) from about −5° C. to about 120° C. in an amount of from 30% to 50% by weight of the acrylic-based polymer; and (b) 0.1% to about 50% by weight of the transdermal drug delivery system of one or more drugs incorporated into the polymer composition, wherein all acrylic-based polymers present in said polymer composition of the transdermal drug delivery system are acrylic-based polymers polymerized with monomers that include: (i) a soft acrylic monomer having a glass transition temperature (T g ) from about −70° C. to about −10° C. in an amount of from 50% to 70% by weight of the acrylic-based polymer; and (ii) a hard acrylic monomer having a glass transition temperature (T g ) from about −5° C. to about 120° C. in an amount of from 30% to 50% by weight of the acrylic-based polymer, and wherein said acrylic-based polymers are not polymerized with methacrylic acid monomers.