Dreve-otoplastik Gmbh

Dreve Prodimed Gmbh

Derve-otoplastik Gmbh

Thomas Veit

Martin Klare

Michael Kutschinski

Reiner Altmann

Reiner Altman

Georgia Meissner

Emre Civelek

A transparent, elastic, and biocompatible 1K silicone for additive manufacturing that can be printed by stereolithographic processes, includes at least

Material for 3D printing and method of making and use of the material

The invention relates to a biocompatible, low-viscosity, radiation-curable formulation for producing medical products, in particular adaptive ear pieces, otoplastic parts, shells or ear parts, by means of PNP methods or stereolithographic methods. Said formulation comprises: a) 15-60 wt. % of a monomeric or oligomeric dimethacrylate based on bisphenol A or bisphenol F; b) 0-50 wt. % one or more monomeric or oligomeric urethane (meth)acrylates with a functionality n&#x3c;4, a viscosity &#x3c;30 Pa s and a molecular weight &#x3c;3500; c) 2-25 wt. % of a monomeric, aliphatic or cycloaliphatic dimethacrylate with a viscosity &#x3c;3 Pa s; d) 2-35 wt. % of an iminooxadiazone dion derivative, characterised by 3 methacrylate and/or acrylate functions; 0-15 wt. % one or more monofunctional methacrylates; f) 0.5-6 wt. % of a photo initiator or a combination of photo initiators, whose absorption lies in the wavelength range of the laser beam that is used or the irradiation source; g) 0-0.5 wt. % one or more anaerobic inhibitors; h) 0-40 wt. % fillers with a particle size &#x3c;25 &#x3bc;m; i) 0-5 wt. % colorants; j) 0-5 wt. % conventional additives such as UV stabilisers or process additives, whereby the sum of the fraction of the components a) to j) totals 100 wt. %.

Low-viscosity, radiation-curable formulation for producing adaptive earpieces

A two-component addition-crosslinking silicone comprises (a) 0.1-70% by weight polyorganosiloxanes containing at least two unsaturated groups in the molecule; (b) 0.1-15% by weight polyorganohydrogensiloxanes containing at least two SiH groups in the molecule; (c) 0.01-2.0% by weight noble metal catalyst; and (d) 0.1-5% by weight of a non-toxic antimicrobial additive or a combination of at least two non-toxic antimicrobial additives.

Antimicrobial polymerizable ear piece material

A biocompatible, low-viscosity, radiation-curable composition for producing antimicrobial earpieces contains:

Low-viscosity radiation-curable composition for making an earpiece

The invention relates to a biocompatible, low-viscous, radiation curable formulation, particularly for use in stereolithography, for use in medical technology, in particular, for producing earpieces, containing: a) 55-95% by weight of a monomeric or oligomeric dimethacrylate based on bisphenol A or bisphenol F; b) 0-20% by weight of a urethane methacrylate having a functionality of n&#x3c;4 and a viscosity&#x3c;15 Pa s; c) 2-15% by weight of a monomeric aliphatic or cycloaliphatic dimethacrylate having a viscosity&#x3c;5 Pa s; d) 0-15% by weight of a monofunctional methacrylate having a viscosity&#x3c;3 Pa s; e) 0.5-6% by weight of a photoinitiator or a combination of a number of photoinitiators whose absorption is located within the wavelength range of the laser beam used; f) 0.0001-2% by weight of the inhibitor 2,2,6,6-tetramethylpiperidin-1-yloxy (free radical), also in conjunction with known inhibitors; g) 0-40% by weight of fillers; h) 0-5% by weight of coloring pigments; i) 0-5% by weight of remaining additives such as UV stabilizers or spreading additives, whereby the proportions of constituents a) to h) total 100% by weight.

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Münster, Germany

Thomas Veit