flame-retardant networks containorganophosphorus flame retardants. To achieve excellent flame- retardant effect, a large amount of phosphorus was added to the resin matrices. As a result, apart from exacerbating the migration of organophosphorus, their thermal stability and phase transition temperature are further reduced, thus weakening the thermal properties of the material to a certain extent. In order
山梨醇作为一种低成本的糖基化学品,近年来在环氧树脂领域的报道较少。鉴于其环氧单体的低粘度特性,通过无溶剂绿色固化工艺制备先进的树脂体系具有重要意义。众所周知,现有的阻燃网络大多含有有机磷阻燃剂。为了获得优异的阻燃效果,在树脂基体中添加了大量的磷。这样一来,除了加剧有机磷的迁移外,其热稳定性和相变温度也进一步降低,从而在一定程度上削弱了材料的热性能。为了克服这些问题,我们在山梨醇基环氧树脂中引入超低量的磷以实现高效阻燃。结果发现,引入0.55 P wt%量的EP-DOPO可以达到UL94-V0级阻燃效果。与其他含磷阻燃剂不同,反应型EP-DOPO有利于热稳定性和相变温度的提高,同时也有效避免了磷的迁移。
PHOTOSENSITIVE RESIN COMPOSITION FOR FLEXIBLE CIRCUIT BOARD AND FLEXIBLE CIRCUIT BOARD USING THE SAME
申请人:FUJII Hirofumi
公开号:US20080063955A1
公开(公告)日:2008-03-13
A photosensitive resin composition for a flexible circuit board having excellent flame retardancy and with non-halogenation for consideration of environmental aspects, and a flexible circuit board obtained by using the same. The photosensitive resin composition includes (A) a linear polymer containing a carboxyl group obtained by addition polymerizing an ethylenic unsaturated compound; (B) a polymerizable compound containing an ethylenic unsaturated group; (C) a photopolymerization initiator: and (D) a phosphorated epoxy resin containing phosphorous atom at not less than 2% by weight based on a total molecular weight thereof.