US 12,110,427 B2
Polyorganosiloxane hybrid pressure sensitive adhesive and methods for the preparation and use thereof
Elizabeth Kelley, Midland, MI (US); Timothy Mitchell, Clio, MI (US); and Jodi Mecca, Midland, MI (US)
Assigned to Dow Silicones Corporation, Midland, MI (US)
Appl. No. 17/299,139
Filed by Dow Silicones Corporation, Midland, MI (US)
PCT Filed Mar. 13, 2020, PCT No. PCT/US2020/022529
§ 371(c)(1), (2) Date Jun. 2, 2021,
PCT Pub. No. WO2020/186129, PCT Pub. Date Sep. 17, 2020.
Claims priority of provisional application 62/818,131, filed on Mar. 14, 2019.
Prior Publication US 2022/0073800 A1, Mar. 10, 2022
Int. Cl. C09J 183/10 (2006.01); C08G 77/08 (2006.01); C08G 77/12 (2006.01); C08G 77/20 (2006.01); C08G 77/442 (2006.01); C09J 7/38 (2018.01); C08G 77/00 (2006.01)
CPC C09J 183/10 (2013.01) [C08G 77/08 (2013.01); C08G 77/12 (2013.01); C08G 77/20 (2013.01); C08G 77/442 (2013.01); C09J 7/38 (2018.01); C08G 77/70 (2013.01); C09J 2301/302 (2020.08); C09J 2301/414 (2020.08); C09J 2483/00 (2013.01)] 17 Claims
 
1. A polyorganosiloxane hybrid pressure sensitive adhesive composition comprising:
(I) a polyorganosiloxane having both aliphatically unsaturated groups and poly(meth)acrylate groups, wherein the polyorganosiloxane comprises unit formula:
[R3w(R5—S—R″)(OR4)(2-w)Si—O1/2]p[R3v(R5—S—R″)(OR4)(1-v)Si—O2/2]q[(R5—S—R″)Si—O3/2]k(R6R72SiO1/2)r(R72SiO2/2)s(R6R7SiO2/2)t(R73SiO1/2)u,
where each subscript w is independently 0, 1, or 2, each subscript v is independently 0 or 1, each R3 is an independently selected monovalent hydrocarbon group; each R4 is an independently selected alkyl group; each R5 is an independently selected divalent hydrocarbon group, each R″ is independently a (meth)acrylate polymer or copolymer, each R6 is an independently selected aliphatically unsaturated monovalent hydrocarbon group, each R7 is an independently selected monovalent hydrocarbon group free of aliphatic unsaturation, subscript p≥0, subscript q≥0, subscript k≥0, a quantity (p+q+k)≥1, subscript r≥0, subscript s≥0, subscript t≥0, subscript u≥0, a quantity (r+t)≥1, and a quantity (p+q+k+r+s+t+u) is sufficient to provide a molecular weight of at least 50 kDa to the polyorganosiloxane;
(II) an organohydrogensilicon compound having, per molecule, at least 3 silicon bonded hydrogen atoms;
(III) a hydrosilylation reaction catalyst;
optionally (IV) a hydrosilylation reaction inhibitor;
(V) a polyorganosilicate resin; and
optionally (XX) a solvent.