Compounds That Absorb Ultraviolet Light, Methods of Their Preparation and Optical Lenses Containing Them
申请人:Kauffman Joel M.
公开号:US20080064880A1
公开(公告)日:2008-03-13
Compounds that absorb ultraviolet light 380 nm to 400 nm range but avoid absorption in the blue light range, thereby imparting yellowness, i.e., 410-420 nm have suitable refractive characteristics useful in the preparation of optical resins or plastics suitable, for example, for the manufacture of ophthalmic lenses. Methods for making the compounds, optic lenses containing the compounds, and methods for making these are also described.
Mesomorphic compound, liquid crystal composition containing same, liquid crystal device using same and display apparatus
申请人:CANON KABUSHIKI KAISHA
公开号:EP0440061A1
公开(公告)日:1991-08-07
A mesomorphic compound represented by the following formula (I):
wherein Ri and R2 respectively denote a linear or branched alkyl group having 3 - 18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of
wherein Z denotes -0- or -S- and R3 denotes hydrogen or an alkyl group having 1 - 5 carbon atoms; B1 denotes
A1 denotes a single bond,
A2 denotes a single bond, -A3- or -A3-A4- wherein A3 and A4 respectively denote any one of
and Y, and Y2
respectively denote any one of hydrogen, fluorine, chlorine, bromine, -CH3, -CN and -CF3.
Organopolysiloxane-grafted polybenzobisoxazoles and method for preparing same
申请人:DOW CORNING ASIA, Ltd.
公开号:EP0641831A1
公开(公告)日:1995-03-08
An organopolysiloxane-grafted polybenzobisoxazole and a method for the preparation thereof are disclosed, said polybenzobisoxazole comprising repeat units having formulas (VI) and (VII), wherein the repeat unit (VI)/repeat unit (VII) molar ratio is in the range of 100/0 to 1/99
in which A¹ denotes a tetravalent aromatic group,
A² denotes a divalent organopolysiloxane group having the formula (VIII)
in which R¹ denotes a divalent organic group having at least 2 carbon atoms, R² through R⁶ independently denote monovalent organic groups, n is an integer having a value of at least 1 and m is 1 or 2 and
A³ comprises at least one group selected from reactive side chain-free divalent aromatic groups and reactive side chain-substituted divalent aromatic groups, with the proviso that the molar ratio of reactive side chain-free divalent aromatic groups to reactive side chain-substituted divalent aromatic groups is in the range of 100/0 to 0/100.
[EN] COMPOUNDS THAT ABSORB ULTRAVIOLET LIGHT, METHODS OF THEIR PREPARATION AND OPTICAL LENSES CONTAINING THEM<br/>[FR] COMPOSES ABSORBANT LA LUMIERE ULTRAVIOLETTE, LEURS METHODES DE PREPARATION ET LENTILLES OPTIQUES LES CONTENANT
申请人:ESSILOR INT
公开号:WO2006069811A3
公开(公告)日:2007-01-04
COMPOUNDS THAT ABSORB ULTRAVIOLET LIGHT, METHODS OF THEIR PREPARATION AND OPTICAL LENSES CONTAINING THEM
申请人:ESSILOR INTERNATIONAL
(Compagnie Générale d'Optique)