C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 1/14 (2006.01) A61L 15/28 (2006.01) A61L 15/60 (2006.01) C08J 3/075 (2006.01) C08J 3/20 (2006.01) C08L 1/12 (2006.01) C08L 33/02 (2006.01) C08L 33/06 (2006.01) C08L 39/04 (2006.01) C08L 39/06 (2006.01) C08L 53/02 (2006.01) C08L 71/02 (2006.01)
Patent
CA 2445086
Hydrogel compositions are provided (a) that have a continuous hydrophobic phase and a discontinuous hydrophilic phase, (b) that have a discontinuous hydrophilic phase and a continuous hydrophilic phase, or (c) that are entirely composed of a continuous hydrophilic phase. The hydrophobic phase, if present, is composed of a hydrophobic polymer, particularly a hydrophobic pressure- sensitive adhesive (PSA), a plasticizing elastomer, a tackifying resin, and an optional antioxidant. The discontinuous hydrophilic phase, if present, is composed of a crosslinked hydrophilic polymer, e.g., a crosslinked cellulosic polymer such as crosslinked sodium carboxymethylcellulose. For those hydrogel compositions containing a continuous hydrophilic phase, the components of the phase include a cellulose ester composition or an acrylate polymer or copolymer, and a blend of hydrophilic polymer and a complementary oligomer capable of hydrogen bonding thereto. Films prepared from hydrogel compositions containing or entirely composed of the aforementioned continuous hydrophilic phase can be made translucent, and may be prepared using either melt extrusion or solution casting. A preferred use of the hydrogel compositions is in wound dressings, although numerous other uses are possible as well.
La présente invention concerne des compositions d'hydrogel (a) à phase hydrophobe continue et phase hydrophile discontinue, (b) à phase hydrophile discontinue et phase hydrophile continue, ou (c) totalement en phase hydrophile continue. La phase hydrophobe éventuelle est constitué d'un polymère hydrophobe, plus particulièrement d'un autocollant hydrophobe, d'un élastomère plastifiant, d'une résine poisseuse, et éventuellement d'un antioxydant. La phase hydrophile discontinue éventuelle est constituée d'un polymère hydrophile réticulé, par exemple un polymère cellulosique réticulé tel qu'une carboxyméthylcellulose de sodium réticulée. Pour les compositions d'hydrogel à phase hydrophile continue, les composants de la phase incluent une composition d'ester de cellulose, ou un polymère ou copolymère d'acrylate, et un mélange de polymère hydrophile et d'un oligomère complémentaire capable de s'y lier par l'hydrogène. Les films obtenus à partir des compositions d'hydrogels contenant ou entièrement composé de la phase hydrophile continue mentionnée peuvent être rendus translucides, et peuvent s'élaborer par extrusion de matière fondue, soit par coulée de solution. Ces compositions d'hydrogels conviennent particulièrement pour les pansements à blessures, bien que d'autres nombreuses utilisations soient possibles.
Chalykh Anatoly E.
Cleary Gary W.
Feldstein Mikhail M.
Kulichikhin Valery G.
Parandoosh Shoreh
A.v. Topchiev Institute Of Petrochemical Synthesis
Battison Williams Dupuis
Corium International
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