Bicycloaliphatic 2-methylene-1,3-dioxepanes

Details Bicycloaliphatic 2-methylene-1,3-dioxepanes Bicycloaliphatic 2-methylene-1,3-dioxepanes

1995-10-25

1997-12-30

Dentz, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549338, 549351, 526266, 526273, 106 35, C07D31744, C07D31772

Patent

active

057032491

ABSTRACT:
The present invention relates to novel bicycloaliphatic 2-methylene-1,3-dioxepanes, which are suitable as starting materials for the preparation of polymers and copolymers, preferably of composite and dental materials. The 2-methylene-1,3-dioxepanes according to the invention, which can undergo radical polymerisation with ring opening with only very little volume shrinkage, can be prepared in a simple manner, are easy to purify and to modify chemically, and are characterised by lack of odour and advantageous physical properties.

REFERENCES:
Bailey, W.J., et al., "Free Radical Ring-Opening Polymerization of 4,7-Dimethyl-2-methylene-1,3-dioxepane and 5,6-Benzo-2-methylene-1,3-dioxepane," Macromolecules, 15:711-14 (1982).
Schulze, T., et al., "Crosslinking Copolymerization of Cyclic Ketenacetals With Low Shrinkage in Volume," Macromolecular Chemistry and Physics, 196:567-72 (1995).
Bailey, W.J., et al., "Synthesis of Poly-e-Caprolactone via a Free Radical Mechanism. Free Radical Ring-Opening Polymerization of 2-Methylene-1,3-Dioxepane," Journal of Polymer Science, 20:3021-30 (1982).
Endo, T., et al., "Photoinitiated Ring-Opening Polymerization of 2-Methylene-1,3-Dioxepane," Journal of Polymer Science 21:373-80 (1983).
Bailey, W.J., et al., "Synthesis of Functionally-Terminated Oligomers by Free Radical Ring-Opening Polymerization," J. Macromol. Sci.-Chem., A21(8&9):979-95 (1984).

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