The present invention provides a dye that is excellent in solubility and excellent in heat resistance and a novel compound that is preferable for the dye, and specifically provides a yellow dye having a wavelength of maximum absorption in the region of 400 to 450 nm, and also provides a coloring (alkali-developable) photosensitive composition using the above-mentioned dye, and an optical filter using the above-mentioned coloring (alkali-developable) photosensitive composition, specifically a color filter that does not decrease luminance and thus is preferable for image display devices such as liquid crystal display panels. Specifically, a compound represented by the following general formula (1) is used as the dye. The content of the above-mentioned general formula (1) is as described in the description.
Verfahren zur Herstellung optisch aktiver Beta-Lactame
申请人:CIBA-GEIGY AG
公开号:EP0259268A1
公开(公告)日:1988-03-09
Die Erfindung betrifft ein Verfahren zur Herstellung von ß-Lactamverbindungen der Formel
worin R1 Wasserstoff oder eine unter den Ringschlussbedingungen nicht abspaltbare Hydroxyschutzgruppe R1a und R2 den Acylrest einer schwachen Carbonsäure darstellt, dadurch gekennzeichnet, dass man eine Verbindung der Formel
worin R1a und R2 die unter Formel angegebenen Bedeutungen haben, mit Chlorsulfonylisocyanat umsetzt, aus der gebildeten Verbindung die Chlorsulfongruppierung reduktiv abspaltet, gewünschtenfalls die Hydroxyschutzgruppe R1a abspaltet, und gewünschtenfalls die gebildete Verbindung der Formel I gegebenenfalls von dem vorhandenen 3S,4S,1R'-Diastereomeren befreit.
The present invention provides a dye that is excellent in solubility and excellent in heat resistance and a novel compound that is preferable for the dye, and specifically provides a yellow dye having a wavelength of maximum absorption in the region of 400 to 450 nm, and also provides a coloring (alkali-developable) photosensitive composition using the above-mentioned dye, and an optical filter using the above-mentioned coloring (alkali-developable) photosensitive composition, specifically a color filter that does not decrease luminance and thus is preferable for image display devices such as liquid crystal display panels. Specifically, a compound represented by the following general formula (1) is used as the dye. The content of the above-mentioned general formula (1) is as described in the description.
Multi-arm polycarboxylate water reducer and preparation method thereof
申请人:Jiangsu ARIT New Materials CO., LTD.
公开号:US11518837B1
公开(公告)日:2022-12-06
The present invention discloses a multi-arm polycarboxylate water reducer and a preparation method thereof, the preparation method includes the following steps: making a phenolic hydroxyl containing rigid compound and p-nitrobenzonitrile subjected to a nucleophilic substitution reaction in a solvent, then subjected to addition with a sodium azide in a solvent and water mixed solution to obtain a tetrazole derivative; making an unsaturated polyether macromonomer subjected to terminal halogenation and react with the prepared tetrazole derivative to obtain a tetrazole-containing multi-arm unsaturated polyether macromonomer; and subjecting the tetrazole-containing multi-arm unsaturated polyether macromonomer, an unsaturated carboxylic acid small monomer and an unsaturated polyether macromonomer to a free radical polymerization reaction under combined action of an initiator, a reducing agent and a molecular weight regulator to obtain the multi-arm polycarboxylate water reducer integrating shrinkage reducing and antibacterial functions.