Low dielectric polymer and film, substrate and electronic part using the same
申请人:TDK Corporation
公开号:EP0788118A1
公开(公告)日:1997-08-06
A low dielectric polymer is obtained by polymerizing a monomeric composition comprising a fumaric acid diester monomer and optionally a vinyl monomer. The polymer having a low dielectric constant and reduced dielectric loss is used as an electrically insulating material in a high frequency band of at least 500 MHz.
AbstractDie Darstellung von neuen Vinylestern aromatischer und heterocyclischer Carbonsäuren nach bekannten Methoden wird beschrieben. Im Gegensatz zu den Literaturangaben wurde gefunden, daß auch Divinylestern aus Dicarbonsäuren durch direkte Vinylierung mit Acetylen darstellbar sind.
Otsuka, Nippon Kagaku Zasshi, 1954, vol. 75, p. 995,1004
作者:Otsuka
DOI:——
日期:——
Method for esterification of polyvinyl alcohol-based resin, resultant modified polyvinyl alcohol-based resin, and method for production of the same
申请人:Nitta Daisuke
公开号:US20090247698A1
公开(公告)日:2009-10-01
A gist of the present invention lies in a method for esterification of a polyvinyl alcohol-based resin, wherein a vinyl ester is used as an esterifying agent in a method for esterification of a polyvinyl alcohol-based resin by an esterification reaction using an esterifying agent. The esterification method can esterify the polyvinyl alcohol-based resin at a high reaction rate under mild reaction conditions using relatively simple reaction equipment, and is also applicable to a wide variety of polyvinyl alcohol-based resins without being restricted by polymerization and saponification degrees of the polyvinyl alcohol-based resin. Thus, it is possible to provide a modified polyvinyl alcohol-based resin having excellent physical properties such as polymerization and modification degrees, which is applicable to various applications.