35 results about "Hexaarylbiimidazole" patented technology

The invention discloses a UV-LED (ultraviolet-light emitting diode) photocureable coating and a preparation method thereof. The photocureable coating is characterized by consisting of the following components in percentage by mass: 20-30% of high-functionality fatty acid polyurethane acrylate oligomer 6197, 10-20% of two-functionality polyurethane acrylate 6071, 10-20% of TMPTA (trimethylolpropane triacrylate) serving as a three-functionality functional monomer and an active diluent, 0.1-0.3% of foam inhibitor TEGO920, 10-20% of NPGDA (neopentyl glycol diacrylate) serving as a two-functionality functional monomer and an active diluent, 10-20% of HEMA (hydroxyethyl methacrylate) serving as a single-functionality functional monomer and an active diluent, 0.2-0.5% of flatting agent BYK358N, and 5-10% of HABI-L (hexaarylbiimidazole-L) serving as a photo-initiator. The photocureable coating has the advantages of quick curing, energy conservation, environmental friendliness and the like, and the production efficiency of UV-LED photocuring is promoted.

A photosensitive composition comprising: a compound having two or more mercapto groups directly connected to a hetero ring; a hexaarylbiimidazole compound; a sensitizing dye; and a polymerizable compound having an ethylenically unsaturated double bond.

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.

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.

Disclosed is a curable composition comprising (A) a coloring agent, (B) an alkali-soluble resin, (C) a photopolymerizable compound, (D) a hexaarylbiimidazole-type polymerization initiator, (E) at least one component selected from an oxime-type initiator and a triazine-type initiator, and (F) a multifunctional epoxy compound having a functionality of 4 or more, wherein the content of the multifunctional epoxy compound (F) and the content of the coloring agent (A) are 2 to 20% by mass and 25 to 50% by mass, respectively, relative to the total solid content.

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.

This invention provides a photosensitive resin composition comprising (A) a binder polymer comprising a divalent group represented by general formula (I), a divalent group represented by general formula (II), and a divalvent group represented by general formula(III), (B) a photopolymerizable compound, and (C) a photopolymerization initiator comprising a hexaarylbiimidazole compound containing at least one alkoxy group having 1 to 5 carbon atoms. (I) (II) (III) wherein R, R, and R each independently represent a hydrogen atom or a methyl group; R and R each independently represent an alkyl group having 1 to 3 carbon atoms, an alkoxy group, an OH group, or a halogen atom; and m and n are each independently an integer of 0 to 5.

The invention belongs to the technical field of microelectronic processing materials, and more specifically relates to an ultraviolet positive photoresist based on a hexaaryl biimidazole molecular switch and a use method thereof. The ultraviolet positive photoresist comprises an adhesive A containing oligomer dihydric alcohol, a functionalized hexaaryl biimidazole molecular switch cross-linking agent and a free radical quenching agent, and an adhesive B containing a catalyst and diisocyanate. When the photoresist is used for photoetching, the photoresist polymer is exposed under ultraviolet irradiation, a dynamic C-N covalent bond between two imidazole rings in a hexaarylbiimidazole (HABI) unit is cracked in response to illumination, and a high-molecular polymer containing the dynamic HABI unit is depolymerized to form an oligomer; and the free radical quenching agent is used for ensuring that the photoresist cannot be spontaneously recovered after the photoresist is exposed and depolymerized to form the oligomer, so that the oligomer formed at the exposed part of the photoresist can be dissolved in a developing solution, the unexposed part cannot be dissolved by the developing solution, and a positive pattern with high resolution is obtained after developing.

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.