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.
|