Photochromic blue light filtering materials and ophthalmic devices
申请人:Jani M. Dharmendra
公开号:US20050254003A1
公开(公告)日:2005-11-17
Polymeric compositions have photochromic and blue-light filtering ability and are useful in the manufacture of ophthalmic medical devices. The polymeric compositions comprise a photochromic material incorporated into polymeric host materials and are activatable by blue light having a first wavelength range to become photochromic, and are thereby capable of absorbing blue light in a second wavelength range. Methods of making the compositions comprise incorporating a photochromic material into a polymeric host material.
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.
A photochromic composition which develops a neutral tint such as grey, green, brown or amber upon the irradiation with light including ultraviolet rays such as sunlight starting from the initial colorless state, maintaining a homogeneous color tone in the transient stage of developing color. The photochromic composition comprises 100 parts by weight of a fulgimide compound and/or a fulgide compound, and from 10 to 300 parts by weight of a chromene compound having a molar extinction coefficient of not smaller than 150 L/mol-cm for light of a wavelength of 400 nm.
Synthetic resin laminate having both polarization characteristic and photochromism characteristic
申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP1162482A2
公开(公告)日:2001-12-12
A synthetic resin laminate having both phtochromism characteristic and polarization characteristic consisting essentially of two transparent synthetic resin layers, a resin layer having phtochromism characteristic and a resin layer having polarization characteristic interposed between said two transparent synthetic resin layers and an adhesive layer to adhere said resin layer having polarization characteristic to said one transparent synthetic resin layer, wherein said one transparent synthetic resin layer to contact said resin layer having phtochromism characteristic has a thickness of 50 µm or above and a retardation value of 150 nm or below, or 3000 nm or above.
PLASTIC MOLDED PRODUCT HAVING PHOTOCHROMIC CHARACTERISTICS AND/OR POLARIZING CHARACTERISTICS
申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP1394595A1
公开(公告)日:2004-03-03
A plastic molded article laminated a layer with a photochromic property and/or a layer with a polarization property on at least one side of a base material, said base material being a polycarbonate having a photoelastic constant of 55×10-12 m2/N or below.