US 12,296,032 B2
Process of taking a dental impression with a radiation-curable composition containing mercapto-functional polyorganosiloxanes and VQM resins
Henning Hoffmann, Windach (DE); Peter U. Osswald, Tuerkheim (DE); Peter Bissinger, Diessen (DE); and Joachim W. Zech, Kaufering (DE)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Appl. No. 17/595,997
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Jun. 9, 2020, PCT No. PCT/IB2020/055409
§ 371(c)(1), (2) Date Dec. 1, 2021,
PCT Pub. No. WO2020/250129, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 19179611 (EP), filed on Jun. 12, 2019.
Prior Publication US 2022/0226201 A1, Jul. 21, 2022
Int. Cl. A61K 6/90 (2020.01); A61C 9/00 (2006.01)
CPC A61K 6/90 (2020.01) [A61C 9/0006 (2013.01)] 12 Claims
 
1. A process of taking a dental impression, the process comprising the steps of
providing a radiation-curable dental impression composition,
placing the radiation-curable dental impression composition in contact with dental tissue,
applying radiation to the radiation-curable dental impression composition,
letting the radiation-curable dental impression composition cure,
removing the cured dental impression composition from the dental tissue,
the radiation-curable dental impression composition comprising
mercapto-functional polyorganosiloxane(s) as Component A,
VQM resin(s) as Component B1,
photo-initiator(s) as Component C for initiating a curing reaction between Component A and Component B1,
optionally filler(s) as Component D
the mercapto-functional polyorganosiloxane according to Component A comprising the following features:
fraction of (mercaptoalkyl)methylsiloxane units: 7-100 mol-%;
[(CH3)2RSiO1/2]w[(CH3)3SiO1/2]x[(CH3)2SiO]y[R(CH3)SiO]z,  formula:
with w being 0 to 0.1, x being 0 to 0.1 and w+x being 0.01 to 0.1, y being 0 to 0.93, z being 0.07 to 0.99, wherein each R is independently selected from a mercapto C1-10 hydrocarbyl group; and
molecular weight (Mn): 500 to 20,000 g/mol;
the VQM resin comprising the following features:
concentration of unsaturated moieties: at least 0.15 mmol/g;
viscosity: 500 to 90,000 mPa*s at 23° C.