US 12,338,259 B2
Branched organosilicon compound, method of preparing same, and copolymer formed therewith
Matthew Jeletic, Midland, MI (US); and Nanguo Liu, Midland, MI (US)
Assigned to Dow Silicones Corporation, Midland, MI (US)
Appl. No. 17/419,003
Filed by Dow Silicones Corporation, Midland, MI (US)
PCT Filed Dec. 27, 2019, PCT No. PCT/US2019/068725
§ 371(c)(1), (2) Date Jun. 28, 2021,
PCT Pub. No. WO2020/142370, PCT Pub. Date Jul. 9, 2020.
Claims priority of provisional application 62/786,703, filed on Dec. 31, 2018.
Prior Publication US 2022/0112224 A1, Apr. 14, 2022
Int. Cl. C08G 77/18 (2006.01); C07F 7/08 (2006.01); C08G 77/20 (2006.01); C08G 77/24 (2006.01); C08G 77/385 (2006.01); C08G 77/44 (2006.01); C08G 77/50 (2006.01)
CPC C07F 7/0838 (2013.01) [C07F 7/0874 (2013.01); C08G 77/18 (2013.01); C08G 77/20 (2013.01); C08G 77/24 (2013.01); C08G 77/385 (2013.01); C08G 77/44 (2013.01); C08G 77/50 (2013.01)] 15 Claims
 
1. A branched organosilicon compound having the following general formula:

OG Complex Work Unit Chemistry
where each R1 is selected from R and —OSi(R4)3, where each R4 is selected from R, —OSi(R5)3, and —[OSiR2]mOSiR3, where 0≤m≤100; where each R5 is selected from R, —OSi(R6)3, and —[OSiR2]mOSiR3, where m is defined above; where each R6 is selected from R and —[OSiR2]mOSiR3, where m is defined above; with the proviso that at least one of R4, R5 and R6 is —[OSiR2]mOSiR3, where m is defined above;
X is a divalent linking group; and
Y is selected from one of formulas (I)-(III):

OG Complex Work Unit Chemistry
where each R is an independently selected substituted or unsubstituted hydrocarbyl group; each D1 is an independently selected divalent hydrocarbon group; each subscript a is independently 0 or 1; each subscript b is independently 0 or 1; each subscript e is independently 1 or 2; each subscript f is independently 0 or 1, with the proviso that when f is 1, b is 1; subscript t is ≥0; subscript u is >0; 0≤n≤10; and R3 comprises a halogen atom, an acryloxy functional moiety, an alkoxysilyl functional moiety, or an epoxy functional moiety; and
wherein at least one of the following provisos is true:
a) two R1 are OSi(R4)3; or
b) at least two R4 are —OSi(R5)3 or —[OSiR2]mOSiR3; or
c) at least two R5 are —OSi(R6)3 or —[OSiR2]mOSiR3; or
d) at least two R6 are —[OSiR2]mOSiR3.