摘要:
The chromene compound is represented by the following formula (I), wherein R3 at the 11-position is a sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group, heteroarylthio group, sulfonyl group and sulfinyl group, R1 and R2 at the 6-position and the 7-position are a combination of an aryl group or a heteroaryl group and an electron donating group having a Hammett constant σp of −0.1 or less, or R1 and/or R2 is sulfur-containing substituent selected from thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group.
摘要:
A chromene compound which develops a color of a neutral tint and has high color optical density, high fading speed and excellent durability and a photochromic curable composition comprising the chromene compound and polymerizable monomers.The chromene compound is represented by the following formula (1). (wherein R1 is an aryl group or heteroaryl group, and R2 is a sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group.)
摘要:
A photochromic cured product exhibiting favorable photochromic properties such as a high color density and a large fading rate, and excellent base member properties such as a high hardness, a high heat resistance and a high impact resistance. A curable composition contains a polymerizable monomer which exhibits the L-scale Rockwell hardness of not larger than 40, a bifunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, a polyfunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, and a photochromic compound.
摘要:
A laminated product has a multilayer structure comprising an optical base and a cured polyurethane resin layer formed thereon from a moisture-curable polyurethane resin and/or a precursor therefor. The polyurethane resin layer is formed by applying a coating fluid comprising a moisture-curable polyurethane resin and/or precursor therefor and a solvent having a boiling point of 70° C. or higher and a solubility parameter of 8 or larger. Also provided is a coating material comprising a radical-polymerizable monomer ingredient, a silicone or fluorochemical surfactant, and a photochromic compound. In producing a photochromic optical article, excellent adhesion between a base and a photochromic layer is attained.
摘要:
A polymerization curable composition prepared by blending specific amounts of a photochromic compound and a specific light stabilizer such as bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate with monomer components including a specific bifunctional monomer having a structure that two phenylene groups are bonded together by a specific group, such as 2,2-bis(4-methacryloyloxypolyethoxyphenyl)propane, a polyfunctional polymerizable monomer having a functionality of 3 or more such as trimethylolpropane trimethacrylate, and a monomer other than these in a specific ratio. The polymerization curable composition provides a cured product having excellent photochromic properties such as fast fading rate and sufficiently high drilling strength that allows for its use in rimless spectacles and has high long-term storage stability.
摘要:
A chromene compound of this invention, as shown in the following formula: characterized by having an indeno(2,1-f)naphtho(1,2-b)pyran structure as a basic structure, and having a substituent which is a substituted or unsubstituted aryl group such as methoxyphenyl group, or a substituted or unsubstituted heteroaryl group such as thienyl group bonding to a carbon atom at the seventh position of the indeno(2,1-f)naphtho(1,2-b)pyran structure. The photochromic compound exhibits a color tone of a neutral tint when it develops a color, features a high color-developing sensitivity and a high fading rate, and has a good photochromic resistance.
摘要:
A photochromic composition and a coating composition comprising a molecular compound of a chromene compound and an aromatic compound. The photochromic composition provides a photochromic optical material as a cured product and the coating composition is applied to a lens substrate and cured to provide a photochromic optical material. The above molecular compound is also provided.
摘要:
The present invention is aimed to produce a cured product having excellent photochromism which can be easily polymerized in a short period of time. The cured product is obtained by photopolymerizing a polymerizable composition comprising (A) a radical polymerizable monomer, (B) an ultraviolet polymerization initiator having the main absorption at an ultraviolet range and a molar absorption coefficient for light having a wavelength of 400 nm of 150 liter/(mol·cm) or more, (C) a thermopolymerization initiator such as a thermopolymerization initiator having a temperature at which the half-life thereof is 10 hours of 60° C. or more and (D) a photochromic compound by irradiating activation energy rays having a wavelength of 400 nm or more as the main emission spectrum, preferably to ensure that the temperature of the cured product does not exceed 50° C., and further thermopolymerizing the composition by heating.
摘要:
A chromene compound which develops yellow to red color, a high color density and a little initial color and which, when used in combination with an existing photochromic compound that exhibits blue color so as to develop a neutral tint, maintains uniformity in the color tone at the time of developing color or fading color, or exhibits a very large color fading rate. The chromene compound has a naphthopyran cyclic skeleton, and is expressed by, for example, the following formula in which a substituent such as substituted amino group or morpholino group is bonded to the sixth position of the naphthopyran ring through a nitrogen atom, and two aryl groups having a particular substituent are bonded to the third position thereof,
摘要:
The present invention relates to a photochromic curable composition suited for the production of a photochromic cured product having excellent optical properties such as a high refractive index and a large Abbe's number, having favorable photochromic properties such as a large color density, and having good fatigue resistance, and to a photochromic lens obtained by curing the photochromic curable composition. The photochromic curable composition is characterized by comprising 100 parts by weight of a polymerizable monomer containing at least 10% by weight of a sulfur-containing (meth)acrylate polymerizable monomer represented by the following general formula (1), wherein R1, R2 and R3 may be the same or different and are hydrogen atoms or methyl groups, and n is an integer of 1 to 10, and 0.001 to 10 parts by weight of a photochromic compound.