Surface modifying coating for medical devices

• Main Authors: ZHOU, Ming, RUSH, Benjamin L, LEE, Yann-Per
• Format: Patent
• Language: English
• Published: 06.06.2024
• Subjects: ADHESIVES; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; DYES; FILLING PASTES; HUMAN NECESSITIES; HYGIENE; INKS; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

A surface modifying coating for an article that includes a first component having a surface in frictional engagement with a surface of a second component. At least a portion of a surface of one of the components is coated with a coating including a mixture of at least two silicones: (i) a hydrolyzable organopolysiloxane with a viscosity of less than or equal to 1,000 centistokes and that is capable of crosslinking reaction upon exposure to moisture at ambient temperature; and (ii) a second organopolysiloxane copolymerizable with the first hydrolyzable organopolysiloxane and having viscosity of greater than or equal to 5,000 centistoke; wherein the coating provides a maximum break loose force equal to or less than three times a kinetic extrusion force such that stiction is reduced between engaged surfaces. The coating is compatible with high-temperature sterilization methods sometimes used on articles for medical uses, is resistant to leaching, migration and breakdown during long-term aging conditions, and does not require a catalyst, crosslink agent, or additional energy source for preparation or application.