US 12,138,323 B2
Initiator system with polymerizable thiourea component, dental composition and use thereof
Kai U. Claussen, Duesseldorf (DE); Johannes M. Leykauff, Weilheim (DE); Wolf Steiger, Weil-Petzenhausen (DE); and Peter Bissinger, Diessen (DE)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Appl. No. 18/556,708
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Mar. 28, 2022, PCT No. PCT/IB2022/052845
§ 371(c)(1), (2) Date Oct. 23, 2023,
PCT Pub. No. WO2022/229734, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 21171076 (EP), filed on Apr. 29, 2021.
Prior Publication US 2024/0189196 A1, Jun. 13, 2024
Int. Cl. A61K 6/61 (2020.01); A61K 6/30 (2020.01); A61K 6/887 (2020.01)
CPC A61K 6/61 (2020.01) [A61K 6/30 (2020.01); A61K 6/887 (2020.01)] 13 Claims
 
1. An initiator system for curing a dental composition, the initiator system comprising
a hydroperoxide component,
a transition metal component comprising ions of Cu, Ti, V, Cr, Mn, Fe, Co, Ni, Zn or mixtures thereof,
a polymerizable thiourea component, the polymerizable thiourea component comprising a thiourea moiety which is attached to a (meth)acrylate moiety through a C3-11 alkyl chain and having the formula
MA-S-TU-R
with
MA: (meth)acrylate,
S: C3-11 alkyl,
TU: NH—CS—NH
R: C1 to C6 alkyl or cyclo alkyl.