C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 157/00 (2006.01) A61B 5/0408 (2006.01) A61F 13/02 (2006.01) A61K 9/70 (2006.01) A61L 15/58 (2006.01) A61L 24/04 (2006.01) A61L 26/00 (2006.01) A61N 1/04 (2006.01) A61N 1/30 (2006.01) C08F 220/12 (2006.01) C09J 7/02 (2006.01) C09J 9/00 (2006.01)
Patent
CA 2179907
A polymerized microemulsion pressure sensitive adhesive composition is described. The composition preferably has a bicontinuous structure of a continuous phase of a hydrophobic pressure sensitive adhesive polymer and a continuous phase of a hydrophilic polymer. The bulk properties of both polymers are retained in the bicontinuous structure. The composition is prepared from a microemulsion comprising a free-radically ethylenically unsaturated polar amphiphilic or hydrophilic monomer or oligomer in the aqueous phase, a free-radically ethylenically unsaturated hydrophibic monomer, having a glass transition temperature suitable for forming a pressure sensitive adhesive, in the oil phase, water, and surfactant. Uses for the pressure sensitive adhesive composition include biomedical articles, such as biomedical electrodes (10), medical skin coverings (90), and pharmaceutical delivery devices (100), and industrial articles, such as zinc/adhesive tapes used for cathodic protection of rebars embedded in concrete.
L'invention se rapporte à une composition adhésive sensible à la pression obtenue à partir d'une microémulsion polymérisée. De préférence, la composition possède une structure bicontinue constituée d'une phase continue d'un polymère adhésif sensible à la pression, hydrophobe, et d'une phase continue d'un polymère hydrophile. Les propriétés de base des deux polymères sont conservées dans la structure bicontinue. La composition est préparée à partir d'une microémulsion comprenant un monomère ou oligomère radicalaire, éthyléniquement insaturé, polaire, amphiphile ou hydrophile dans la phase aqueuse, un monomère radicalaire, éthyléniquement insaturé, hydrophobe, ayant une température de transition du verre appropriée pour former un adhésif sensible à la pression, dans la phase huileuse, l'eau et le tensioactif. Cette composition adhésive sensible à la pression est utilisée pour fabriquer des articles biomédicaux, tels que des électrodes biomédicales (10), des pansements médicaux (90) et des dispositifs d'administration (100) de produits pharmaceutiques, ainsi que des articles industriels, tels que des bandes zinc/adhésif utilisés dans la protection cathodique de barres d'armature encastrées dans le béton.
Dietz Timothy M.
Lu Ying-Yuh
Uy Rosa
Young Chung I.
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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