Low-viscous, radiation curable formulation, particularly for...

Details Low-viscous, radiation curable formulation, particularly for... Low-viscous, radiation curable formulation, particularly for...

2007-06-19

2007-06-19

Hamilton, Cynthia (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

C430S284100, C430S917000, C522S016000

Reexamination Certificate

active

10561651

ABSTRACT:
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<4 and a viscosity<15 Pa s; c) 2-15% by weight of a monomeric aliphatic or cycloaliphatic dimethacrylate having a viscosity<5 Pa s; d) 0-15% by weight of a monofunctional methacrylate having a viscosity<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.

REFERENCES:
patent: 5354785 (1994-10-01), Rheinberger et al.
patent: 5969000 (1999-10-01), Yang et al.
patent: 6025114 (2000-02-01), Popat et al.
patent: 2002/0152930 (2002-10-01), Neubert et al.
patent: 2002-302523 (2002-10-01), None
Sartomer Application Bulletin “Chemical Intermediates—Design Unique Polymers with Sartomer's Specialty Monomers” dates Dec. 2004, 4 pages, from TOTAL, Sartomer Company.

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