Provided is a phosphaphenanthrene-based compound represented by the following chemical structure:
The phosphaphenanthrene-based compound can be added in a resin composition and made into a prepreg or resin film. The prepreg or resin film made from such resin composition has low coefficient of thermal expansion, low dielectric constant and dissipation factor, and flame retardancy, thereby being suitable for copper-clad laminate or printed circuit board.
FLAME RETARDANT COMPOUND, METHOD OF PREPARING THE SAME AND USE THEREOF
申请人:Elite Electronic Material (Zhongshan) Co., Ltd.
公开号:US20190085150A1
公开(公告)日:2019-03-21
Disclosed is a phosphorus-containing compound capable of serving as a flame retardant to be used in conjunction with other ingredients to make resin compositions, useful for fabricating such as a prepreg, a resin film, a resin film with copper foil, a laminate or a printed circuit board, having improved one or more properties including glass transition temperature, coefficient of thermal expansion, thermal resistance, flame retardancy, dielectric constant, and dissipation factor. In addition, a method of preparing the phosphorus-containing compound and a resin composition comprising the phosphorus-containing compound are also disclosed.
ready-stock aryl carboxylicacids has been developed based on weak carboxylate-directed ortho-C–H alkylation and concomitant decarboxylation processes, fabricating 3-aryl succinimides, a recurrent scaffold in drug molecules, in high yields (up to 97%). The protocol features operational simplicity, avoids the need for precious metal additives/oxidants, and offers broad substrate scope with formal meta- and
of maleimides, innate electrophiles, has been realized under Ru(II)-catalysis such that exposure to electrophiles delivered products of C–H chalcogenation and amidation in good yields (up to 94%). This protocol features mild conditions and operational simplicity with broad substrate scope, uses an inexpensive and air-stable catalyst, and also represents the first example of Ru(II) catalyzed C–H selenylation
A rhodium(III)‐catalyzedC(sp3)−Halkenylation of 8‐methylquinolines with electron‐deficient maleimides has been accomplished with the combination of copper acetate, 2,2,6,6‐tetramethylpiperidine‐1‐oxyl and oxygen as the oxidant. A variety of maleimides react with various 8‐methylquinolines to furnish the corresponding alkenylated products in moderate to good yields.