The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.
A series of aromatic oligoamidefoldamers with two or three pyridine‐2,6‐dicarboxamide units as their main folding motifs and varying aromatic building blocks as linkers have been synthetized to study the effects of the structural variation on the folding properties and conformational stability. Crystallographic studies showed that in the solid state the central linker unit either elongates the helices
Compound having oxadiazole structure and a dehydration-cyclization method for producing the same
申请人:MORIYAMA Hideki
公开号:US20090182171A1
公开(公告)日:2009-07-16
A compound having an oxadiazole structure which is obtained by dehydration-cyclization of a compound having a carbohydrazide structure using a chemical agent selected from acids and bases. The dehydration-cyclization of the compound having a carbohydrazide structure can be conducted under mild conditions at low cost.
The present invention relates to organic solvent soluble dyes. In particular, the invention relates to an organic solvent soluble metal complex azo dyes containing chelated metal atoms.
A laminate having a metal foil layer, and a polyimide resin layer provided on the metal foil layer, wherein the polyimide resin layer is obtained by curing a coating of a polyimide resin precursor solution directly applied onto a surface of the metal foil layer, wherein the polyimide resin layer has a linear expansion coefficient in the range from 10 to 30 ppm/K, wherein the metal foil layer and the polyimide resin layer have a bonding strength therebetween of at least 0.5 kN/m in terms of 180° peel strength, and wherein the polyimide resin obtained from the polyimide resin precursor solution contains at least 50% by weight of a moiety having a structure represented by the following formula (1) shown in the specification.