20results about "Photosensitive materials" patented technology

The present invention relates to photohardenable compositions for use in forming an object. The photohardenable compositions include a photohardenable resin component, a first photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength, and a second photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength.

The invention relates to a preparation method of a nano silver halide emulsion, which comprises the following steps: S1, fully dissolving deionized water, sodium bromide, a nucleating aid, a stabilizer and gelatin in a container with disc type stirring, and uniformly mixing to prepare a primary glue solution; uniformly mixing silver nitrate with deionized water to prepare a silver nitrate solution; uniformly mixing sodium bromide, potassium iodide and deionized water to prepare a halogen solution; s2, at a certain temperature, injecting a prepared silver nitrate solution and a halogen solution into the primary glue solution at the same time to obtain a mother solution containing nano silver halide; and S3, desalting the mother liquor containing the nano silver halide, supplementing glue, and sensitizing to obtain the nano silver halide emulsion. The nucleating aid and the stabilizer are added into the gelatin aqueous solution, the prepared nano silver halide particles are uniform, stable in storage and free of aggregation, and the emulsion can be desalted at normal temperature, is low in energy consumption and high in production efficiency, and is beneficial to continuous production.

To provide a novel method for diagnosing a film for degradation which allows a more efficient and more secure determination of a degraded state of the film based on resin.SOLUTION: The present invention relates to a method for diagnosing a film based on resin for degradation to achieve the object, the method using an analysis technique B as a non-destructive method as described below: the analysis technique B is a technique of confirming the presence or absence of acid anhydride and a sign of a hydrolysis reaction in the film by Fourier transform infrared spectroscopy analysis.SELECTED DRAWING: Figure 1

Provided is an optical article having a substrate, a primer layer generated by curing a polymerizable composition for forming the primer layer, and a photochromic layer containing a photochromic compound in this order, in which the polymerizable composition for forming the primer layer contains a component A: a polyisocyanate, a component B: a hydroxy group-containing polymerizable compound, and a component C: a polymerizable compound having a viscosity of 100 cP or less and being selected from the group consisting of (meth)acrylates and vinyl ethers.

A mask element for flexographic printing is provided. The mask element can be used for preparing a mask that has a mask image. The mask element can include: a transparent polymeric carrier sheet; a barrier layer on the transparent polymeric carrier sheet, wherein the barrier layer comprises non-crosslinked nitrocellulose; and an imaging layer on the barrier layer, wherein the imaging layer includes a non-silver halide thermally-ablatable material comprising non-crosslinked nitrocellulose, carbon black, and an infrared (IR) dye. In some aspects, the mask element further includes a transparent overcoat layer on the imaging layer. The mask can include: imaged regions in the imaging layer, wherein the imaged regions have optical apertures that are substantially devoid of the carbon black and non-crosslinked nitrocellulose thereof; and non-imaged regions in the imaging layer, wherein the non-imaged regions have the non-crosslinked nitrocellulose, carbon black, and infrared dye.

An object of the present invention is to provide a novel method for diagnosing film degradation which can identify the degraded state of a film based on a resin more efficiently and reliably than ever. In order to attain this object, a method for diagnosing the degradation of a film based on a resin is adopted, the method comprising using the following analysis method A and / or analysis method B, which is a non-destructive analysis method: analysis method A: confirming the presence or absence of abnormality in the film by visual observation and olfactometry, and analysis method B: confirming the presence or absence of an acid anhydride and a sign of hydrolysis reaction as to the film by Fourier transform infrared spectroscopy analysis.

The present invention relates to a photochromic article that includes: (a) a substrate; (b) a photochromic layer that includes a photochromic compound over the substrate; and (c) a UV absorbing layer that includes a UV absorber over the photochromic layer. The photochromic layer has an unactivated state absorbance of greater than 0 over at least a portion of wavelengths of from 250 nm to 450 nm. The UV absorbing layer has a terminal minimum absorbance wavelength value that is at least 45 nm less than a first unactivated state terminal minimum absorbance wavelength value of the photochromic layer. The present invention also relates to ophthalmic articles such as corrective lenses.

A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.

The present invention relates to photohardenable compositions and methods of forming an object, the method preferably including a photohardenable composition described herein. Preferred photohardenable compositions and methods include a photohardenable resin component, a first photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength, and a second photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength. Preferred first photoinitators include photoswitchable photoinitiators. Preferably the second light- activated photoinitiator comprises a free-radical photoinitiator. Hardenable resin compositions and methods of forming an object including the hardenable resin composition are also disclosed.

Provided are photochromic compounds represented by General Formula 1, photochromic compounds represented by General Formula 2 and photochromic compounds represented by General Formula 3. In General Formula 1, R100 to R111, and X1 and X2 each independently represent a hydrogen atom or a substituent, and two or more substituents may be bonded to form a ring structure. In General Formula 2, R200 to R211, and X3 and X4 each independently represent a hydrogen atom or a substituent, and two or more substituents may be bonded to form a ring structure. In General Formula 3, R300 to R311, and X5 and X6 each independently represent a hydrogen atom or a substituent, and two or more substituents may be bonded to form a ring structure.

A method of preparing a photoactive perovskite material.SOLUTION: Contacting lead halide with a first solvent to dissolve the lead halide and form a lead halide solution; contacting a Group 1 metal halide with a second solvent; Dissolving the Group 1 metal halide to form a Group 1 metal halide solution; and contacting the lead halide solution with the Group 1 metal halide solution to form the thin film precursor ink; depositing the thin film precursor ink on a substrate; drying the thin film precursor ink to form a thin film; annealing the thin film; and immersing the thin film in a salt solution comprising a third solvent and a salt selected from a specified group.SELECTED DRAWING: Figure 1

A compound represented by formula (1). [In formula (1), R represents an alkyl group having 1-5 carbon atoms, X represents a halogen element or an alkoxy group, n1 represents an integer of 0-5, and n2 represents an integer of 1 or more]

To provide a photosensitive surface treatment agent.SOLUTION: A photosensitive surface treatment agent includes a compound expressed with a following formula (M1) (in the formula (M1), R1 denotes a hydrogen atom, a tert-butoxycarbonyl group or an ester-based protective group, R2 denotes a hydrogen atom or an alkyl group having 1-6 carbon atoms, m denotes an integer of 1 or larger, and X denotes a halogen atom or an alkoxy group. [Chem.1].SELECTED DRAWING: None

The present invention relates to photohardenable compositions and methods of forming an object, the method preferably including a photohardenable composition described herein. Preferred photohardenable compositions and methods include a photohardenable resin component, a first photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength, and a second photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength. Preferred first photoinitators include photoswitchable photoinitiators. Preferably the second light- activated photoinitiator comprises a free-radical photoinitiator. Hardenable resin compositions and methods of forming an object including the hardenable resin composition are also disclosed.

Provided is a method and an apparatus for indicating minimum exposure of a surface to UVC light emitted by a source during a decontamination process to achieve a desired level of pathogen reduction. The apparatus includes a photochromic material to be applied to, or applied adjacent to the surface. The photochromic material is to exhibit a visible response to receiving the minimum exposure to the UVC light, and exhibit the visible response to a lesser extent after the photochromic material ceases to be exposed to the UVC light emitted by the source. A protective layer of material that is substantially transparent to the UVC light emitted by the source is positioned over the photochromic material to be disposed between the source and the photochromic material during the decontamination process.

A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.

Carbon black, characterized in that the content of polycondensed aromatic hydrocarbons, measured according to the PAH method, is less than 5 ppm and the STSA surface area is < 90 m² 2 / g, the toluene extract is less than 0.04%.

Compounds useful as fluorescent or colored dyes are disclosed. The compounds have the following structure (I), including salts thereof, wherein R1a, R1b, R1c, R1d, R1e, R1f, R2a, R2b, R2c, R2d, R2e, R2f, R2g, R2h, R2i, R2j, x and y are as defined herein. Methods associated with preparation and use of such compounds are also provided.

A composition includes the reaction products of sulfur monochloride with an allyl methacrylate. The compositions described herein provide photopolymers and. thermosetting polymers with attractive optical properties (RI, transparency) and thermomechanicals (high Tg).