DUPONT-MITSUI FLUOROCHEMICALS CO LTD Patent applications |
Patent application number | Title | Published |
20150191561 | TETRAFLUOROETHYLENE/PERFLUORO(ALKYL VINYL ETHER) COPOLYMER - Purpose: To provide a melt-moldable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer with excellent durability without causing an excessive decrease of the melt flow rate and an increase of the perfluoro(alkyl vinyl ether) content. | 07-09-2015 |
20140309355 | Fluororesin composition and its molded product - Disclosed are injection-moldable fluororesin compositions of melt flowable fluororesin and mesoporous silica. The fluororesin compositions are melt flowable and have a melt flow rate of from 2 to 60 g/10 min. The mesoporous silica has an average pore diameter of from 2 to 50 nm, and the pores of the mesoporous silica are filled with the melt flowable fluororesin. The fluororesin compositions have excellent melt moldability for manufacturing molded products from the fluororesin composition that demonstrate high hardness. | 10-16-2014 |
20140287177 | FLUOROPOLYMER MOLDED ARTICLE - Provided is a large-size injection molded article which is obtained by injection molding a composition containing a heat-meltable fluoropolymer. Specifically, provided is a large-size injection molded article, which can be molded at a lower injection pressure as compared with a conventional PFA and obtained by molding a composition superior in mold release characteristics from a metal mold. This large-size injection molded article is superior in, particularly, heat resistance and chemical resistance, as well as dimensional accuracy, for a substrate processing apparatus. | 09-25-2014 |
20140063819 | REFLECTOR FOR LIGHT-EMITTING DIODE AND HOUSING - Provided is a reflector for a light-emitting diode which has a small decrease in reflectance in a range from the ultraviolet region to visible region, and has excellent heat resistance, light resistance, and weather resistance, and a housing having this reflector. The reflector for a light-emitting diode is obtained by molding a fluororesin composition containing a filler with an average particle diameter of smaller than 1 μm, wherein the difference between the maximum value and the minimum value of the reflectance at a wavelength of 240-700 nm is within 25%. | 03-06-2014 |
20130161873 | TETRAFLUOROETHYLENE COPOLYMER COMPOSITION FOR INJECTION MOLDING - A tetrafluoroethylene copolymer composition for injection molding having excellent resistance to chemical permeation and durability, comprised of polytetrafluoroethylene and copolymer of tetrafluoroethylene and perfluoro(alkyl vinyl ether). The composition has a melt flow rate of 12 g/10 min or greater, a flex life of 20,000 cycles or greater, and a nitrogen gas permeability of 0.8×10 | 06-27-2013 |
20120172530 | Fluoropolymer Molding Method and Molded Article - A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient. | 07-05-2012 |
20120171493 | Fluoropolymer Molding Method and Molded Article - A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient. | 07-05-2012 |
20100261809 | Polymer Composition with Uniformly Distributed Nano-Sized Inorganic Particles - The present invention provides a polymer composition wherein inorganic particles are uniformly dispersed at the nano level in the polymer without having said inorganic particles being surface-treated. It further provides a method for manufacturing a polymer composition wherein a co-aggregate which is obtained by uniformly mixing polymer dispersion with an inorganic particle colloidal solution and co-aggregating the polymer primary particles and inorganic particles which are heterogeneous particles, is separated from the solvent and dried so that the inorganic particles are uniformly dispersed at the nano level in the polymer; and the polymer composition which is obtained by said method. | 10-14-2010 |
20100197861 | Fluoropolymer Molding Process and Fluoropolymer Molded Product - A fluoropolymer molding process is provided for molding a mixture of at least two of fluoropolymers having different melting points at a temperature that is at or above the melting point of the fluoropolymer with the lowest melting point and is less than the melting point of the fluoropolymer with the highest melting point, and the resultant fluoropolymer molded product has excellent resistance to chemical and gas permeation and a low coefficient of linear expansion. | 08-05-2010 |
20100000771 | COPPER-CLAD LAMINATE, PRINTED-WIRING BOARDS, MULTILAYER PRINTED-WIRING BOARDS, AND METHOD FOR MANUFACTURING THE SAME - The present invention is to significantly improve copper-foil adhesion strength (copper-foil peel strength) without roughening or blackening a copper-foil surface, and thereby to provide a copper-clad laminate used favorably in a high frequency range. The copper-clad laminate ( | 01-07-2010 |
20090297751 | Fluoropolymer Blends with Inorganic Layered Compounds - Perfluoropolymer composites are provided which are obtained by dispersing layered-silicates having properties of swelling or cleaving in dispersion media in perfluoropolymers and having the ratio of the viscosity, V | 12-03-2009 |