Patent ID: 9421737
Filing Date: 2016-08-23
CPC Classification: B29C,B32B,C08G,C08J,C09J,Y10T

Claim Text:
1. A process for manufacturing a long term implantable medical device comprising: providing a substrate for the device of, or having a section coated with, a silicone or silicone based material; flame treating a surface of the silicone or silicone based material; and bonding a polyurethane or polyurethane urea to the flame treated surface of the silicone or silicone based material, the polyurethane or polyurethane urea being selected from biostable polyurethanes and polyurethane ureas comprising soft segments and hard segments, the soft segments having a number average molecular weight of about 500-6000 and being formed from a polysiloxane diol or diamine of the formula (III) in which A and A′ are OH or NHR wherein R is H or C R R p is an integer of 1 or greater; and a polyether diol or diamine represented by the formula (I) in which A is OH or NHR, X is O or NR and A′ is H wherein R is H or C m is an integer of 4 to 18; and n is an integer of 2 to 50; and, optionally, a poly(alkylene) carbonate (II); a copoly[ether carbonate] macrodiol, formed by copolymerizing (I) and (II) and/or a silicon-containing poly(alkylene) carbonate (IV) formed by copolymerizing compound (III) and compound (II); and the hard segments being formed from a diisocyanate and a chain extender comprising a silicon-containing diol chain extender (V) and/or a silicon-containing diamine chain extender (VI).