US 11,981,836 B2
Silicone pressure-sensitive adhesive and silicone pressure-sensitive adhesive composition
Aizoh Sakurai, Tokyo (JP)
Assigned to 3M Innovative Properties Company, Saint Paul, MN (US)
Appl. No. 17/292,646
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Nov. 8, 2019, PCT No. PCT/IB2019/059631
§ 371(c)(1), (2) Date May 10, 2021,
PCT Pub. No. WO2020/099999, PCT Pub. Date May 22, 2020.
Claims priority of application No. 2018-214906 (JP), filed on Nov. 15, 2018.
Prior Publication US 2022/0002601 A1, Jan. 6, 2022
Int. Cl. B32B 41/00 (2006.01); A61L 24/04 (2006.01); C08G 77/00 (2006.01); C08G 77/08 (2006.01); C08G 77/12 (2006.01); C08G 77/16 (2006.01); C08G 77/20 (2006.01); C09J 7/38 (2018.01); C09J 183/04 (2006.01)
CPC C09J 183/04 (2013.01) [A61L 24/046 (2013.01); C08G 77/08 (2013.01); C08G 77/12 (2013.01); C08G 77/16 (2013.01); C08G 77/20 (2013.01); C08G 77/70 (2013.01); C09J 7/38 (2018.01); C09J 2301/122 (2020.08); C09J 2301/302 (2020.08)] 17 Claims
OG exemplary drawing
 
1. A silicone pressure-sensitive adhesive, comprising a reaction product of a composition comprising:
a silanol end group-containing linear organopolysiloxane;
a non-functional linear organopolysiloxane; and
a silicate resin,
wherein the molar equivalent of silanol groups in the silicate resin is greater than the molar equivalent of silanol groups in the silanol end group-containing linear organopolysiloxane, such that unreacted silicate resin remains after a condensation reaction between the silanol end group-containing linear organopolysiloxane and the silicate resin, and wherein the dynamic viscosity of the non-functional linear organopolysiloxane at 25° C. is 100,000 mm2/sec or greater.