8 results about "Naphthol AS" patented technology

The application provides a preparation method of 3-aryl / alkyl-beta-naphthyl ether compounds, and the preparation method comprises the following steps: reacting trimethyl orthoformate with 1,3-diaromatic propyl ketone compounds or 1-aryl-3-alkyl ketone compounds to obtain 3-aryl-beta-naphthyl ether compounds or 3-alkyl-beta-naphthyl ether compounds. The reaction condition of the application is mild, trimethyl orthoformate is cheap and easy to obtain, can be used as a methylation reagent and a carbon source for extending a carbon chain at the same time, the range of reaction substrates is wide, and the functional group tolerance is good; the reaction is efficient, the selectivity is high, the post-treatment is simple, the operation is simple, and the application is suitable for large-scale industrial production; the complex substrate prepared in advance in the traditional reaction is avoided, the metal catalyst necessary for the traditional reaction is not needed, the binaftyl alcohol precursor compounds can be prepared with high chemical selectivity, and a more simple and efficient route is provided for the olefin hydroformylation / hydroformyl esterification reaction for synthesizing bidentate ligands.

The present invention provides a toner for developing electrostatic latent images and a method for manufacturing the toner for developing electrostatic latent images. The toner contains a binder resin which contains an amorphous polyester resin A, and a colorant. The amorphous polyester resin A is a polycondensate of an alcohol component, a carboxylic acid component, and polyethylene terephthalate. The colorant contains a naphthol AS-based pigment. The manufacturing method includes a step for melt-kneading at least the binder resin and the colorant, and a step for pulverizing a kneaded substance resulting from the previous step. The toner for developing electrostatic latent images according to the present invention is suitable for developing latent images and the like formed in electrophotography, electrostatic recording, electrostatic printing, or the like.

Photochromic polyamide materials, their precursors, preparation methods, photoinitiators, and applications are disclosed. The precursors for photochromic materials are described, which are used to prepare photochromic polyamide materials. This process involves mixing the precursor with multifunctional hydrocarbon groups or their derivatives to obtain the photochromic material. Specific functional hydrocarbon groups can be selected for mixing to enhance the performance of the photochromic material. By introducing photochromic units into the polyamide structure, the material can quickly respond to ultraviolet light and return to a colorless state, maintaining excellent photochromic effects. Simultaneously, the polyamide matrix significantly enhances the material's mechanical strength, wear resistance, and environmental adaptability, giving it long-term stable color-changing properties. This makes it suitable for various fields such as smart coatings and optical devices. This solution addresses the technical problems of existing naphthol-pyran-based photochromic materials in terms of photoresponse, mechanical properties, and chemical stability.

Disclosed are wash resistant compositions for altering the tone or color of the hair, the compositions comprising a hair coloring agent comprising an oxidation base chosen from toluene-2,5-diamine, acid salts thereof, or solvates thereof, and a coupler system comprising at least one coupler chosen from 1-napthol, 2-amino-4-hydroxyethylaminoanisole sulfate, and derivatives thereof, addition salts thereof, solvates thereof, or solvates of salts thereof; or mixtures thereof, as well as methods of using the compositions.

This invention relates to a photosensitizer-modified high-efficiency and stable quantum dot light-emitting diode (QLED) and its preparation method, belonging to the field of optoelectronic display technology. The QLED incorporates the photosensitizer 1-diazo-2-naphthol-4-sulfonic acid (DNS) in its hole injection layer, quantum dot emitting layer, and electron transport layer, and a DNS-modified layer can be formed on the ITO anode surface. The preparation method involves sequentially depositing the aforementioned DNS-doped functional layers using a solution method, followed by a one-step ultraviolet light irradiation treatment to trigger photocrosslinking reactions of DNS at each interface. This invention utilizes a single photosensitizing molecule to simultaneously achieve multiple synergistic optimizations, including enhanced hole injection, protection of the emitting layer from solvent erosion, passivation of electron transport layer defects, and stabilization of the electrode interface, thereby significantly improving the luminous efficiency and operational stability of the QLED. The method is simple and has good compatibility with existing solution processing techniques.

The purpose of the present disclosure is to provide: a photochromic compound that is superior in terms of the temperature dependence and the color fading rate; a naphthol derivative that could be an intermediate for the photochromic compound; and a curable composition, an optical article, a lens, and eyeglasses each including the photochromic compound. An embodiment of the present invention provides a photochromic compound having a skeleton represented by formula (1). In formula (1), M is C, Si, or Ge. Ring A is a substituted or unsubstituted aromatic ring, a substituted or unsubstituted aromatic heterocyclic ring, or a substituted or unsubstituted condensed polycyclic ring in which an aromatic ring or an aromatic heterocyclic ring is fused on the substituted or unsubstituted aromatic ring or the substituted or unsubstituted aromatic heterocyclic ring. Z1 is a group represented by formula (1a) or a group represented by formula (1b).

This invention relates to a toner for developing electrostatic images that exhibits excellent charge stability under high temperature and high humidity conditions, and to a method for manufacturing the same. [Solution] A toner for developing electrostatic images containing an amorphous polyester resin A and a colorant, wherein the amorphous polyester resin A is a polycondensate of an alcohol component, a carboxylic acid component, and polyethylene terephthalate, and the colorant contains a naphthol AS-based pigment; and a method for producing the toner for developing electrostatic images, comprising the steps of melting and kneading at least the binder resin and the colorant, and grinding the kneaded product obtained in the step.