US 11,851,522 B2
End-capped polyisobutylene polyurethane
Joseph T. Delaney, Jr., Minneapolis, MN (US); Andrew J. Ro, Maple Grove, MN (US); David R. Wulfman, Minneapolis, MN (US); Niraj Gurung, Sauk Rapids, MN (US); and Patrick Willoughby, Shoreview, MN (US)
Assigned to CARDIAC PACEMAKERS, INC., St. Paul, MN (US)
Filed by Cardiac Pacemakers, Inc., St. Paul, MN (US)
Filed on Sep. 23, 2022, as Appl. No. 17/951,682.
Application 17/951,682 is a continuation of application No. 16/248,498, filed on Jan. 15, 2019, granted, now 11,472,911.
Claims priority of provisional application 62/618,262, filed on Jan. 17, 2018.
Prior Publication US 2023/0018482 A1, Jan. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 18/28 (2006.01); C08G 18/12 (2006.01); C08G 18/62 (2006.01); C08G 18/48 (2006.01); A61L 31/14 (2006.01); C08G 18/76 (2006.01); A61L 31/12 (2006.01); C08G 18/40 (2006.01); A61L 29/04 (2006.01); C08G 18/83 (2006.01); A61L 31/04 (2006.01); A61L 27/16 (2006.01)
CPC C08G 18/6208 (2013.01) [A61L 27/16 (2013.01); A61L 29/041 (2013.01); A61L 31/048 (2013.01); A61L 31/129 (2013.01); A61L 31/143 (2013.01); C08G 18/12 (2013.01); C08G 18/2865 (2013.01); C08G 18/4063 (2013.01); C08G 18/4808 (2013.01); C08G 18/4854 (2013.01); C08G 18/6204 (2013.01); C08G 18/7671 (2013.01); C08G 18/833 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A polymeric material comprising:
a polyisobutylene-polyurethane block copolymer including:
soft segments including a polyisobutylene diol residue and least one of: a polyether diol residue, a polyester diol residue, and a polycarbonate diol residue;
hard segments including a diisocyanate residue; and
end groups bonded by urea bonds to a portion of the diisocyanate residue, the end groups including a residue of a mono-functional, primary amine having a C3 to C30 aliphatic straight chain, wherein the soft segments are present in the copolymer in an amount of about 40% to about 70% by weight of the copolymer, and the hard segments are present in the copolymer in an amount of about 30% to about 60% by weight of the copolymer.