Hydrolysis of Spiro Derivatives that Undergo No Shrinkage on Polymerization
作者:Hirotaka Tagoshi、Takeshi Endo
DOI:10.1246/bcsj.62.945
日期:1989.3
Acid-catalyzed hydrolyses of spiroorthoeters (1, 2a, 2b, and 2c) and spiroorthocarbonates (3 and 4) were carried out to give the corresponding ring-opening reaction products. The ring-cleavage modes of these spiro derivatives depended on the structure of intermediate cations.
Biomaterial compositions comprising organosilicon monomers (such as silorane monomers) and chemical curing systems or dual chemical/light curing systems, in conjunction with optional tetraoxaspiro[5.5]undecanes (“TOSUs”) and/or fillers. The present invention is directed to biomaterial compositions, as well as methods for manufacturing the same, and methods of using the compositions. The biomaterial composition comprises one or more organosilicon monomers (such as a silorane) and a chemical curing system or dual chemicaVlight curing system for polymerizing the 10 monomer(s). The compositions may include one or more tetraoxaspiro[5.5]undecanes “TOSUs”) and/or fillers. Accelerators (such as photoacids), photosensitizers, and/or electron donors may also be included in the composition as appropriate.