7results about "Preparation by etherification" patented technology

The invention discloses an azo compound, a photo-alignment film and a liquid crystal display device. The azo compound provided by the invention has the following structural formula: # imgabs0 #. The azo compound has the characteristics of good orientation performance, high light sensitivity, low temperature and humidity sensitivity and low chromaticity.

The invention discloses an oil-soluble yellow dye as shown in a formula A, a preparation method of the oil-soluble yellow dye and application of the oil-soluble yellow dye as a coloring agent in a non-aqueous solvent. The oil-soluble yellow dye has the following advantages that (1) raw materials are simple and easy to obtain, the cost is low, the synthesis process is simple, and industrialization is easy; (2) products which are rich in variety and complex in composition can be easily obtained by adjusting the variety of halogenated hydrocarbon and reaction conditions, and the method has remarkable advantages in the aspects of performance regulation and control and formula secrecy; (3) the product shows good solubility in various organic solvents, can be well dissolved at low concentration and high concentration, is bright in color, and has good application prospects in the aspects of printing ink, coating and polymer coloring; wherein R1 is H or C2-C12 even-number carbon straight-chain or branched-chain alkane, R2 is H or C2-C12 even-number carbon straight-chain or branched-chain alkane and the like, and R1 and R2 cannot be H at the same time.

The invention relates to a class of amphiphilic BODIPY derivatives containing azophenyl groups and a preparation method thereof. 4,4'-dibromoethane azobenzene and 1,7-bis(4-hydroxyphenyl)-3,5-bis(4-propynyloxy) azamethylenedipyrrole are reacted to obtain an azamethylenedipyrrole containing an azophenyl group. The azamethylenedipyrrole containing an azophenyl group is reacted under the action of boron trifluoride etherate to obtain a BODIPY mother core containing an azophenyl group. Benzamide containing a hydrophilic chain R is introduced into the BODIPY mother core structure containing an azophenyl group through a click reaction to obtain an amphiphilic Aza-BODIPY dye containing an azophenyl group, with the structural formula shown below. This series of molecules introduces a light-responsive azophenyl group for the first time, completes a self-assembly process for control, and has the characteristics of mild properties and low cost, thereby providing a new approach for achieving in vitro simulation of life systems.

The application discloses an oil-soluble yellow dye shown in formula A, a preparation method thereof and application of the oil-soluble yellow dye as a colorant in a non-aqueous solvent, and has the following advantages: (1) raw materials are simple and easy to obtain, cost is low, a synthesis process is simple, and industrialization is easy; (2) a product with rich types and complex composition can be easily obtained by adjusting a halogenated hydrocarbon type and reaction conditions, and remarkable advantages are possessed in performance control and formula security; (3) the product shows good solubility in various organic solvents, can be well dissolved at low concentration and high concentration, and has good application prospect in ink, paint and polymer coloring; wherein R1 is H or a C2-C12 even carbon straight-chain or branched-chain alkane, R2 is H or a C2-C12 even carbon straight-chain or branched-chain alkane, and R1 and R2 cannot be H simultaneously.

The invention provides a synthesis method of a yellow azo dye, the yellow azo dye and a polarizing film.The synthesis method comprises the steps that 4-acetamido aniline serves as a raw material, diazotization is conducted, and then the diazotized 4-acetamido aniline and 2-chlorophenol are coupled to prepare a first intermediate; hydrolyzing the first intermediate to remove acetyl so as to obtain a second intermediate; carrying out diazo coupling reaction on the second intermediate and N, N-di-n-butylaniline to prepare a third intermediate; and carrying out etherification reaction on the third intermediate and 1-bromododecane to prepare the yellow azo dye. The synthesis method of the yellow azo dye has the advantages of simple operation process, no need of column chromatography purification, no generation of harmful substances, high yield and purity, and good fat solubility.

To provide a compound which can be used to form a polarizing film with a high dichroic ratio.SOLUTION: A compound represented by a formula (1) below is provided. P represents a single bond, -O-, -OC(=O)-, or -C(=O)O-. x and y represent 0, 1 or 2, and satisfies x+y≥1 if P is a single bond. n represents 1 or 2. R1 represents methylamino, ethylamino, dimethylamino, diethylamino, ethylmethylamino, pyrrolidyl, oxazolidyl, piperidyl, morpholyl, methoxy or ethoxy, and may be substituted with a polymerizable group. R2 and R3 respectively represent methyl or ethyl. Q represents a single bond, -OC(=O)-, -C(=O)O-, -C≡C-, -CH=CH-, -N=N-, -NHC(=O)-, or -C(=O)NH-. Ar1 and Ar3 represent 1,4-phenylene or a sulfur-containing aromatic heterocyclic group that may be substituted. Ar2 represents 1,4-phenylene that may be substituted.SELECTED DRAWING: None

This invention discloses a cationic dye and its preparation method, belonging to the field of dye technology and patent classification number C09B26 / 04. The method uses 2-amino-4-nitrophenol as a starting material, which undergoes diazotization and coupling with N-ethyl-N-(2-hydroxyethyl)aniline to obtain an azo precursor containing dihydroxyl groups. Subsequently, this precursor undergoes etherification, silanization, and quaternization reactions sequentially with epichlorohydrin, γ-aminopropyltriethoxysilane, and diethyl 2-bromoethylphosphonate to generate a dye intermediate containing siloxane and quaternary ammonium salt groups. Finally, by adding tetraethyl orthosilicate and tributyl borate, a sol-gel reaction is carried out under acidic conditions to form a nano-borosilicate coated structure. After precipitation, washing, and drying, the final product is obtained. The cationic dye prepared by this invention exhibits good alkali resistance.