The present invention provides heterogeneous organometallic catalysts for alkyne metathesis, including the metathesis of internal alkynes. Organometallic precursors are covalently bonded to the oxygen atoms of metal oxide supports to form catalysts having carbyne functionality. The heterogeneous catalysts provide improved turn-over frequencies at lower reaction temperatures than conventional catalysts.
Resin Composition, Varnish, Resin Film and Semiconductor Device
申请人:Enoki Takashi
公开号:US20090214860A1
公开(公告)日:2009-08-27
Disclosed is a resin composition comprising a benzoxazole resin precursor having a first repeating unit obtained by reacting a bisaminophenol compound and a dicarboxylic acid compound, and a cross-linking agent wherein at least one of the bisaminophenol compound and the dicarboxylic acid compound has a diamondoid structure. The benzoxazole resin precursor further comprises a second repeating unit obtained by reacting a bisaminophenol compound not having a diamondoid structure and a dicarboxylic acid compound not having a diamondoid structure. Also disclosed is a resin film comprising the resin composition.
RESIN COMPOSITION, VARNISH, RESIN FILM AND SEMICONDUCTOR DEVICE
申请人:Sumitomo Bakelite Company, Ltd.
公开号:EP1953181A1
公开(公告)日:2008-08-06
Disclosed is a resin composition comprising a benzoxazole resin precursor having a first repeating unit obtained by reacting a bisaminophenol compound and a dicarboxylic acid compound, and a cross-linking agent wherein at least one of the bisaminophenol compound and the dicarboxylic acid compound has a diamondoid structure. The benzoxazole resin precursor further comprises a second repeating unit obtained by reacting a bisaminophenol compound not having a diamondoid structure and a dicarboxylic acid compound not having a diamondoid structure. Also disclosed is a resin film comprising the resin composition.