US 12,448,487 B2
Polysiloxanes with radiation- and moisture-cross-linkable groups
Michael Stepp, Überackern (AT); HyungDae Jin, San Ramon, CA (US); Ufuk Karabiyik, Ann Arbor, MI (US); and Rabih Makki, Silverspring, MD (US)
Assigned to Wacker Chemie AG, Munich (DE)
Appl. No. 17/916,053
Filed by Wacker Chemie AG, Munich (DE)
PCT Filed Apr. 14, 2020, PCT No. PCT/EP2020/060378
§ 371(c)(1), (2) Date Sep. 30, 2022,
PCT Pub. No. WO2021/209113, PCT Pub. Date Oct. 21, 2021.
Prior Publication US 2023/0167246 A1, Jun. 1, 2023
Int. Cl. C08G 77/26 (2006.01)
CPC C08G 77/26 (2013.01) 11 Claims
 
1. An organo(poly)siloxane (A) consisting of units of general formula (I)
RnSiO(4-n/2)   (I)
where
n is 0, 1, 2 or 3, wherein the proportion of units in which n=0 is not more than 50 mol % and the proportion of units in which n=1 is not more than 60 mol %, in each case based on all units of general formula (I),
R is selected from the radicals R1, —OR2, Ru, RS and Q, where
R1 denotes a monovalent substituted or unsubstituted hydrocarbon radical having 1 to 18 carbon atoms,
R2 denotes a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon radical having 1 to 6 carbon atoms,
Ru denotes a monovalent aliphatic unsaturated hydrocarbon radical having 2 to 18 carbon atoms,
RS denotes a monovalent thiol-functionalized hydrocarbon radical having 1 to 18 carbon atoms,
Q is a nitrogen functional group of formula (II)
—CR5R6—NR4R3   (II),
where
R3 and R4 each independently denote hydrogen or a substituted or unsubstituted hydrocarbon radical having 1 to 18 carbon atoms and
R5 and R6 each independently denote hydrogen or the methyl radical, with the proviso that the organo (poly) siloxane (A) contains per molecule at least one unit of general formula (III),
Q—Si(OR7)2O1/2   (III)
in which R7 is as defined for R2;
at least 1 aliphatically unsaturated radical Ru;
and at least 2 thiol-functionalized groups RS.