Aortech International Plc

Ajay D Padsalgikar

Sriram Venkataramani

Mark Bown

Mansour Mehrabi

Ramasri Mudumba

Jadwiga Weksler

Frank Maguire

Elenora Stepanova

Richard Anup D'Mello

The present invention relates to a biostable polyurethane or polyurea comprising: (a) a soft segment comprising a polysiloxane of the general formula (I); and (b) greater than 0 and less than 40 wt % of a hard segment which is a reaction product of a diisocyanate and a linear difunctional chain extender, processes for their preparation and their use in the manufacture of biomaterials, devices, articles or implants.

Biostable polyurethanes

The present invention relates to biostable gel comprising:

Gels

The invention relates to a process for bonding a silicone or silicone based material to a polyurethane and use of the bonded silicone-polyurethane in the manufacture of biomaterials, devices, articles or implants, in particular long term implantable medical devices in the fields of cardiology, orthopedics, plastic surgery and gastroenterology. The process involves the steps of (a) flame treating a surface of the silicone or silicone based material and (b) bonding the polyurethane to the flame treated surface of the silicone or silicone based material.

Bonding process

The present invention relates to a biostable polyurethane or polyurea comprising: (a) a soft segment comprising a polysiloxane of the general formula (I); and (b) greater than O and less than 40 wt % of a hard segment which is a reaction product of a diisocyanate and a linear difunctional chain extender, processes for their preparation and their use in the manufacture of biomaterials, devices, articles or implants.

The invention relates to a process for bonding a silicone or silicone based material to a polyurethane and use of the bonded silicone-polyurethane in the manufacture of biomaterials, devices, articles or implants, in particular long term implantable medical devices in the fields of cardiology, orthopaedics, plastic surgery and gastroenterology. The process involves the steps of (a) flame treating a surface of the silicone or silicone based material and (b) bonding the polyurethane to the flame treated surface of the silicone or silicone based material.

The present invention relates to a biostable polyurethane or polyurea comprising: (a) a soft segment comprising a polysiloxane of the general formula (I); and (b) greater than O and less than 40 wt % of a hard segment which is a reaction product of a diisocyanate and a linear difunctional chain extender, processes for their preparation and their use in the manufacture of biomaterials, devices, articles or implants. 

The invention relates to an implantable prosthesis and a shell for an implantable prosthesis and methods for making them, in particular a light weight implantable prosthesis containing a biocompatible filler which is suitable for use as a breast implant.

Implantable prosthesis

This invention relates to electrical devices that are implantable inside an animal, including humans. The invention particularly relates to polyurethane headers mounted on the electrical devices to house electrical contacts. The polyurethane headers are formed by (a) mixing (i) a prepolymer comprising a silicon-containing diol of formula (I) in which R, R, Rand Rare independently selected from Calkyl; Rand Rare independently selected from Calkylene; Ris Calkylene, O, S or NR in which R is H or Calkyl; and n is 1 to 3 and a diisocyanate; and (ii) a Calkanediol; (b) injecting the mixture of the prepolymer and the Calkanediol into a mold having a cavity shaped to form a header; (c) allowing the mixture to cure and form a polyurethane header within the mold; and (d) releasing the formed polyurethane header from the mold. 

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Plymouth, MN, United States of America

Ajay D Padsalgikar