Silicone adhesive for adhesion to wet surfaces

US7914645B2 · kind B2 · utility

Assignee

• Dow Corning Corporation · US

Inventors

• Gerald K. Schalau, II · Freeland, US
• Xavier Thomas · Sint-Genesius-Rode, BE
• Victor Albert Raul · Midland, US
• David Clayton Gantner · St. Ignace, US
• Katherine L. Ulman · Sanford, US

Key dates

• Filing date: Jan 3, 2007
• Grant date: Mar 29, 2011
• Expiry date: Sep 28, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2170/40
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A silicone adhesive composition used for adhering a device or a substance to a wet surface contains (i) a silicone resin that is cohydrolysis product of a trialkyl hydrolyzable silane and an alkyl silicate in which the cohydrolysis product contains a plurality of silicon-bonded hydroxy groups; (ii) a linear organopolysiloxane fluid containing terminal silicon-bonded hydroxy groups having a viscosity above 200,000 mm2/s at 25° C.; (iii) a trialkylsiloxy terminated polyorganosiloxane fluid having a viscosity of 100,000-600,000 mm2/s at 25° C.; (iv) a water soluble muco-adhesive polymer selected from the group consisting of a poly(ethylene oxide) polymer having a molecular weight of 100,000 to 8,000,000, an acrylic acid polymer having a molecular weight of 500,000 to 4,500,000,000, and a hydroxyethylcellulose polymer having a molecular weight of 90,000 to 1,300,000,000; and optionally, (v) a solvent selected from the group consisting of aliphatic hydrocarbons, aromatic hydrocarbons, esters, volatile linear and cyclic silicone compounds. Other components such as a silicone polyether, a silicone wax, a drug, an excipient, and/or an active ingredient can also be included.