Patent application number | Description | Published |
20100065777 | WHOLLY AROMATIC LIQUID CRYSTAL POLYESTER COMPOSITION AND OPTICAL PICKUP LENS HOLDER USING SAME - A wholly aromatic liquid crystal polyester resin composition for injection molding, formed by melt-kneading 100 parts by mass of a wholly aromatic liquid crystal polyester resin, and 5 to 20 parts by mass of glass fibers having a number average diameter of 5 to 20 μm and an aspect ratio of 5 or more, the wholly aromatic liquid crystal polyester resin being formed by polycondensation of 60 to 70 mol % of p-hydroxybenzoic acid, 40 to 30 mol % of terephthalic acid and 4,4′-dihydroxydiphenyl combined, and 0 to 5 mol % of isophthalic acid and/or terephthalic acid (for all of these, derivatives thereof are included, and the total of these is 100 mol %). This composition has excellent damping properties, and is suitable for a molding material of an optical pickup lens holder for short type pickups for use in high-speed DVD systems and playback pickups for use in Blu-ray systems. | 03-18-2010 |
20120235089 | LIQUID CRYSTAL POLYESTER RESIN COMPOSITION - A liquid crystal polyester resin composition for camera modules is used, the composition including, based on 100 parts by mass of the composition as a whole, (A) 49.5 to 69.5 parts by mass of a liquid crystal polyester, (B) 30.0 to 50.0 parts by mass of an irregular form or spherical powder having a Mohs hardness of 5 or higher and a primary particle diameter of 5 μm or less, and (C) 0.5 to 5.0 parts by mass of carbon black. The use of the resin composition allows a reduction in the amount of dust generated (particles falling off) during the production of the camera, the use of the camera, and the operation of the camera modules. The resin composition has high surface hardness, is excellent in balance between heat resistance, stiffness, moldability, and resistance to falling of particles off a surface, and causes no malfunction during autofocus control. | 09-20-2012 |
Patent application number | Description | Published |
20120235559 | LIQUID-CRYSTAL POLYESTER RESIN COMPOSITION, MOLDED OBJECT THEREOF, AND OPTICAL DEVICE - A liquid-crystal polyester resin composition according to the present invention contains 100 parts by mass of a liquid-crystal polyester (A), 50 to 150 parts by mass of a titanium oxide (B) having been subjected to an aluminum oxide treatment, a silicon oxide treatment and an organosiloxane treatment as surface treatments, and 0 to 50 parts by mass of an inorganic fibrous filler (C). | 09-20-2012 |
20130056681 | FULLY-AROMATIC THERMOTROPIC LIQUID CRYSTAL POLYESTER RESIN COMPOSITION, MOLDED OBJECT, AND LED REFLECTOR - The fully-aromatic thermotropic liquid crystal polyester resin composition of the present invention comprises 100 parts by mass of a fully-aromatic thermotropic liquid crystal polyester; and 50 to 150 parts by mass of titanium oxide, wherein the fully-aromatic thermotropic liquid crystal polyester comprises a repeating structural unit represented by the following formula (1), a repeating structural unit represented by the following formula (2), and a repeating structural unit represented by the following formula (3), and comprises 65 mole % to 78 mole % of the repeating structural unit represented by the formula (1). | 03-07-2013 |
20140088287 | PRODUCTION METHOD FOR LIQUID CRYSTAL POLYESTER - A method for producing a liquid crystal polyester according to the present invention is a method for producing a liquid crystal polyester, comprising subjecting a composition in which a dicarboxylic acid compound, a hydroxycarboxylic acid compound, and a dihydroxy compound are contained to melt polycondensation, and subjecting an obtained reaction product to solid phase polycondensation, wherein the composition contains, based on a total of the dicarboxylic acid compound, the hydroxycarboxylic acid compound, and the dihydroxy compound, 2 to 30 mole % of a dicarboxylic acid compound represented by the following formula (1), and 40 to 80 mole % of p-hydroxybenzoic acid, a polycondensation temperature of the above melt polycondensation is 315° C. or less, and a polycondensation temperature of the above solid phase polycondensation is 315° C. or less. | 03-27-2014 |
20140110644 | LIQUID CRYSTAL POLYESTER RESIN COMPOSITION, MOLDED BODY, AND LED REFLECTOR - A liquid crystal polyester resin composition of the present invention comprises: 100 parts by mass of a liquid crystal polyester; and 50 to 150 parts by mass of titanium oxide, wherein the liquid crystal polyester comprises 2 to 30 mole % of a repeating structural unit represented by the following formula (1), and 40 to 80 mole % of a repeating structural unit represented by the following formula (2). | 04-24-2014 |