US 11,730,876 B2
Composition I-II and products and uses thereof
Marcus Damian Phillips, Wakefield (GB); and Delphine Blanc, Lyons (FR)
Assigned to Smith & Nephew PLC, Watford (GB); and Bluestar Silicones France SAS, Lyons (FR)
Filed by Smith & Nephew PLC, Watford (GB); and Bluestar Silicones France SAS, Lyons (FR)
Filed on Dec. 5, 2019, as Appl. No. 16/705,056.
Application 16/705,056 is a continuation of application No. 13/989,569, granted, now 10,537,657, previously published as PCT/GB2011/001652, filed on Nov. 25, 2011.
Claims priority of application No. 1019997 (GB), filed on Nov. 25, 2010; and application No. 1104512 (GB), filed on Mar. 17, 2011.
Prior Publication US 2020/0254139 A1, Aug. 13, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/00 (2006.01); A61F 13/02 (2006.01); A61L 15/26 (2006.01); A61L 15/42 (2006.01); A61L 15/58 (2006.01); A61L 24/00 (2006.01); A61L 26/00 (2006.01); C08L 83/04 (2006.01); C08L 77/12 (2006.01); C08G 77/12 (2006.01); C08G 77/20 (2006.01)
CPC A61M 1/915 (2021.05) [A61F 13/0216 (2013.01); A61L 15/26 (2013.01); A61L 15/425 (2013.01); A61L 15/585 (2013.01); A61L 24/0073 (2013.01); A61L 26/0095 (2013.01); C08L 83/04 (2013.01); C08G 77/12 (2013.01); C08G 77/20 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A curable composition apportioned between at least one Part A and at least one Part B, the composition comprising:
the at least one Part A comprising one or more alkenyl-group containing polymers having at least one, or at least two, alkenyl group or moiety per molecule,
the at least one Part B comprising one or more SiH-containing polymers having at least one, or at least two, Si—H unit or moiety per molecule,
a catalyst for curing by addition of an alkenyl-containing polymer to a SiH-containing polymer, and
a blowing agent configured to evolve gas as part of or during the curing reaction,
wherein the SiH-containing polymer is absent from Part A and the alkenyl-group containing polymer is absent from Part B or Part B incorporates a trace amount of the alkenyl-group containing polymer represented as a molar ratio (Si—H unit or moiety)/(alkenyl unit or moiety) of greater than or equal to 2000.