Granted Patent B2

US 12,296,032 · App. 17/595,997 · Granted May 13, 2025

Inventors: Henning Hoffmann (Windach, DE); Peter U. Osswald (Tuerkheim, DE); Peter Bissinger (Diessen, DE); Joachim W. Zech (Kaufering, DE)

Assignee: Solventum Intellectual Properties Company

A61K6/90A61C9/0006

Abstract

Claims (56)

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-%;

[(CH 3 ) 2 RSiO 1/2 ]w [(CH 3 ) 3 SiO 1/2 ] x [(CH 3 ) 2 SiO] y [R(CH 3 )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 C 1-10 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.

2. The process according to claim 1 , the radiation having a wave length in the range of 350 to 550 nm.

3. The process according to claim 1 , the mercapto-functional polyorganosiloxane according to Component A comprising the following features alone or in combination:

viscosity: 10 to 1,000 mPa*s at 23° C.;

amount: 0.5 to 50 wt. % with respect to the weight of the whole composition.

4. The process according to claim 1 , the VQM resin being present in an

amount of 10 to 60 wt. % with respect to the weight of the whole composition.

5. The process according to claim 1 comprising in addition vinylfunctional organosiloxane(s) as Component B2, having the following structure:

wherein R independently represent a non-substituted or substituted, monovalent hydrocarbon group with 1 to 6 C atoms and wherein n is in the range of 3 to 10,000.

6. The process according to claim 1 , the filler(s) comprising following features alone or in combination:

selected from one or more non-reinforcing fillers;

having a BET surface of 0.05 to 50 m 2 /g.

7. The process according to claim 1 , the radiation-curable dental impression composition, wherein

the mercapto-functional polyorganosiloxane(s)

has a fraction of (mercaptoalkyl) methylsiloxane units of 7 to 100 mol-%,

and is present in an amount of 0.5 to 50 wt. %,

the VQM resin(s)

has a vinyl content of at least 0.15 mmol/g,

and is present in an amount of 10 to 60 wt. %,

the photo-initiator(s)

has a light absorption band in the range of 350 to 550 nm,

and is present in an amount of 0.01 to 5 wt. %,

the filler(s)

is selected from non-reinforcing fillers,

and is present in an amount of 0 to 60 wt. %,

wt. % with respect to the weight of the whole composition.

8. The process according to claim 1 comprising in addition absorber(s) selected from zeolite(s), molecular sieve(s) and cyclodextrine(s) as Component E, in an amount of 0.1 to 5 wt. %, wt. % with respect to the whole composition.

9. The process according to claim 1 comprising in addition stabilizer(s) as Component F, in an amount of 0.001 to 1 wt. %, wt. % with respect to the whole composition.

10. The process according to claim 1 , comprising in addition the following components alone or in combination:

surfactant(s) as Component G, in an amount of 0.1 to 15 wt. %;

F-containing component as Component H, in an amount of 0.1 to 15 wt. %;

wt. % with respect to the whole composition.

11. The process according to claim 1 comprising in addition fluorescing dye(s) as Component I, in an amount of 0.001 to 1 wt. %, wt. % with respect to the whole composition.

12. The process according to claim 1 , the radiation-curable dental impression composition comprising the following features alone or in combination:

being a paste;

having a consistency of 27-47 mm according to ISO 4823:2017;

having a viscosity of 5 to 80 Pa*s at 23° C.;

having a depth of cure of 2 to 8 mm according to DIN EN ISO 6874:2015.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (44)