35 results about "Hexaarylbiimidazole" patented technology

The invention belongs to the technical field of flexible intelligent driving materials and particularly relates to a phototropic shape memory polymer material integrating photo-response and temperature response and preparation and application methods thereof. The phototropic shape memory polymer material is a polyurethane elastomer material in a double-crosslinked net structure and is prepared bytaking polycaprolactone diol as a chain extender, tetrahydroxy functionalized hexaaryl biimidazole molecular switches as dynamic crosslinking points and polyols as fixed crosslinking points to performcrosslinking reaction with isocyanate. The phototropic shape memory polymer material can present rapid deformation response under ultraviolet radiation and temperature driving to achieve good phototropic properties and is reversible in deformation under temperature driving, thereby solving the technical problem that intelligent photo-driven materials can achieve driving effects only when the thickness is reduced to a micron scale or are slow in driving response, irreversible or the like.

Compositions and systems for labeling substrates, such as optical disks, using leuco dye-containing coating compositions are described. The composition can comprise a color forming composition, an electromagnetic radiation absorber, and a stabilizing agent. The color forming composition can include a leuco dye, a hexaarylbiimidazole activator, and an acid-generating source. The absorber can be admixed with or in thermal contact with the color forming composition. The stabilizing agent can be configured for protecting the leuco dye upon exposure to ambient light, wherein the stabilizing agent comprises a diarylguanidine dye salt. The coating composition can be optimized for development using electromagnetic radiation having a frequency from about 760 nm and 800 nm.

A process for producing a lithographic printing plate which comprises treating a lithographic printing plate precursor having a photosensitive layer containing a hexaarylbiimidazole compound and a protective layer with a developing solution containing a specific organic solvent and at least either a surfactant or a water-soluble polymer. The generation of development scum is inhibited in the process, and both satisfactory developability and satisfactory printing durability can be attained. The printing plate precursor can be treated with one bath, which is the weakly alkaline developing solution. The process hence has merits including simplification of treatment steps, friendliness to the global environment, space saving, and suitability for a reduction in running cost.

The invention discloses a polyurethane elastomer material and a preparation method thereof. By taking hexaarylbiimidazole (HABI) photochromic molecules and polyhydric alcohol as cross-linking agents of an elastomer material, the polyurethane elastomer material with a double-cross-linking network structure is constructed, and an intelligent deformation polyurethane material having rapid response toultraviolet light is correspondingly obtained and has a self-healing function. A polyurethane elastomer has good mechanical and physical properties of tenacity, ductility, fatigue resistance and thelike, is taken as an intelligent material and has potential application markets in drivers, software robots, artificial biological organs, sensors, manufacturing industry, medical treatment, wearableequipment, medical treatment instructions and the like.

Disclosed is a radiation-sensitive resin composition for spacers, which has high sensitivity and excellent storage stability. Also disclosed are a spacer formed by using such a radiation-sensitive resin composition, a method for forming such a spacer, and a liquid crystal display device comprising such a spacer. Specifically disclosed is a radiation-sensitive resin composition for forming spacers, which contains (A) a resin having, in a side chain, a branched structure and / or an alicyclic structure, an acidic group, and an ethylenically unsaturated group bonded to the main chain through an ester group, (B) a polymerizable unsaturated compound, and (C) a hexaarylbiimidazole compound (C1), an aromatic mercapto compound (C2) and an assistant (C3).

The invention belongs to the technical field of mechanical chemical conduction materials, and particularly relates to a stretching color change polyurethane elastomer material and a preparation methodthereof. The stretching color change polyurethane elastomer material with hexaarylimidazole as a color change unit is prepared from oligomer, namely dihydric alcohol, diisocyanate and hexaarylimidazole molecules as raw materials. The polyurethane elastomer is sensitive to mechanical force response, and the color change degree of the material is in a direct proportion to a stress, that is, the larger the stress is, the more conspicuous the color change is. The polyurethane elastomer material provided by the invention is of a linear structure, the main chain has hexaarylimidazole, the stress can be conducted to the hexaarylimidazole along the main chain when the polyurethane material is strained under the action of the stress, ultimately the C-B band between two imidazole rings of the hexaarylimidazole can be broken, then triphenyl imidazole free radicals of which the color is different from that of the hexaarylimidazole are formed, the stress is vanished, then the polyurethane materialis recovered to an initiator colorless state, and the process is reversible.

The invention belongs to the technical field of mechanochemical conductive materials, and more particularly relates to a photostimulation responsive gel material as well as preparation and applicationthereof. A preparation method comprises the following steps: mixing an organic solution of a polyhydroxy-modified hexaarylbiimidazole molecule, polyglycol and small-molecule polyol under a light-shielding condition and inert gas protection to obtain a mixed solution; and mixing diisocyanate with the mixed solution for a cross-linking reaction under the action of a catalyst to obtain the photostimulation responsive gel material containing an organic solvent after solidification molding. The gel material is sensitive to light stimulation when being placed in a solvent, the degree of deformationcan be regulated by the illumination time, and the longer the irradiation time, the more obvious the deformation. The smart gel material prepared in the invention is of a double crosslinked network structure, and hexaarylbiimidazole is contained in a main chain, which can balance the deformation ability and mechanical properties of the gel. The light-driven gel prepared in the invention has simple reaction process, low cost and wide application range.

The invention discloses an intelligent gel capable of regulating gel-and-sol transformation by light and application of the intelligent gel. The crosslinked point of the intelligent gel is six-aryl biimidazole, the alkinyl group and nitrine are subjected to click chemical reaction under the catalysis effect of cuprous bromide to form a cross-linked network polymer, the six-aryl biimidazole is successfully introduced into the polymer gel, and the excellent switching performance of small molecules is kept. Under the stimulation of visible light, the intelligent gel can be transformed from the solid gel state to the flowable 'liquid' gel state, and after being cut in the dry gel state, the gel has self repairing capacity. The prepared intelligent gel can be used as drug delivery carriers, self repairing materials, light valves of sensors and the like due to unique light-controlled dynamic intersection points and has potential application in biochemistry, medicines, chemical machinery, artificial intelligence and other fields.

A method for forming a water-soluble hexaaryl biimidazole, comprising the steps of reacting benzil with a carboxy benzaldehyde and ammonium acetate to yield a carboxy triaryl imidazole, and dimerizing the carboxy triaryl imidazole in an alkaline aqueous solution of potassium ferricyanide to yield a water-soluble salt of a bicarboxy hexaaryl biimidazole.