	US 12,453,800 B2
	Medical silicone pressure-sensitive adhesive composition
Hengda Yu, Shanghai (CN); Yin Zhang, Shanghai (CN); and Caroline Moine, Saint-Fons (FR)
Assigned to ELKEM SILICONES SHANGHAI CO., LTD., Shanghai (CN); and ELKEM SILICONES FRANCE SAS, Lyons (FR)
Appl. No. 18/035,258
Filed by ELKEM SILICONES SHANGHAI CO., LTD., Shanghai (CN); and ELKEM SILICONES FRANCE SAS, Saint-Fons (FR)
PCT Filed Nov. 3, 2020, PCT No. PCT/CN2020/126100 § 371(c)(1), (2) Date May 3, 2023, PCT Pub. No. WO2022/094748, PCT Pub. Date May 12, 2022.
Prior Publication US 2024/0009343 A1, Jan. 11, 2024
Int. Cl. A61L 24/04 (2006.01)

CPC A61L 24/043 (2013.01) [A61L 2420/06 (2013.01)]

36 Claims

1. A medical silicone pressure-sensitive adhesive composition comprising:

at least one organopolysiloxane A comprising, per molecule, at least two C₂to C₆alkenyl radicals each bonded to a silicon atom,

at least one organopolysiloxane resin B comprising hydroxyl groups bonded to silicone atoms,

at least one organopolysiloxane crosslinker XL having at least three hydrogen atoms bonded to silicone atoms,

at least one organopolysiloxane extender CE having exactly two terminal-hydrogen atoms bonded to silicone atoms,

at least one hydrosilylation catalyst D,

at least one solvent E,

at least one hydrosilylation inhibitor F,

wherein the organopolysiloxanes A, CE and XL are chosen such that the molar ratio RHAlk=tH/tAlk is from 3.5 to 8.0; and nH^XL/nH^CEis from 0.13 to 11, with:

tH=number of moles of hydrogen atom directly bonded to a silicon atom of the organopolysiloxanes XL and CE;

tAlk=number of moles of alkenyl directly bonded to a silicon atom of the organopolysiloxane A;

nH^XL=number of moles of hydrogen atom directly bonded to a silicon atom of the organopolysiloxane XL; and

nH^CE=number of moles of hydrogen atom directly bonded to a silicon atom of the organopolysiloxane CE.