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    • 1. 发明授权
    • Production of wholly aromatic polyester film
    • 生产纯粹的芳香聚酯薄膜
    • US5091138A
    • 1992-02-25
    • US648642
    • 1991-01-31
    • Toshinori IshiiMasanori Sato
    • Toshinori IshiiMasanori Sato
    • B29C55/12B29K67/00B29L7/00C08G63/06C08G63/682C08J5/18
    • C08J5/18C08G63/065C08J2367/04
    • A wholly aromatic polyester film, (A) which is made of a wholly aromatic polyester consisting essentially of the following recurring units I and II ##STR1## wherein the aromatic ring may be optionally substituted with at least one substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom and a phenyl group, said wholly aromatic polyester comprising 10 to 90 mol % of the recurring unit I and 90 to 10 mol % of the recurring unit II, being capable of forming an optically anisotropic melt phase, and having a melt strength at a temperature 20.degree. C. higher than its transition temperature to liquid crystal of at least 2.0 g/mm.sup.2 ; (B) said film having an oxygen permeability of not more than 1.0 cc.20.mu./m.sup.2.day.atm at a temperature 20.degree. C. and a relative humidity 65%; and (C) said film having thermal shrinkages both in the machine direction and in a direction perpendicular thereto of not more than 1% at a temperature 250.degree. C. Said wholly aromatic polyester film can be produced by melt-extruding a wholly aromatic polyester to form into a film under conditions that a shear rate applied to the wholly aromatic polyester in a molten state at the exit of the molding die is not less than 500 sec.sup.-1.
    • 2. 发明授权
    • Wholly aromatic polyester film
    • 纯粹的芳香聚酯薄膜
    • US5053481A
    • 1991-10-01
    • US365729
    • 1989-06-14
    • Toshinori IshiiMasanori Sato
    • Toshinori IshiiMasanori Sato
    • B29C55/12B29K67/00B29L7/00C08G63/06C08G63/682C08J5/18
    • C08J5/18C08G63/065C08J2367/04
    • A wholly aromatic polyester film, (A) which is made of a wholly aromatic polyester consisting essentially of the following recurring units I and II ##STR1## wherein the aromatic ring may be optionally substituted with at least one substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom and a phenyl group, said wholly aromatic polyetser comprising 10 to 90 mol % of the recurring unit I and 90 to 10 mol % of the recurring unti II, being capable of forming an optically anisotropic melt phase, and having a melt strength at a temperature 20.degree. C. higher than its transition temperature to liquid crystal of at least 2.0 g/mm.sup.2 ; (B) said film having an oxygen permeability of not more than 1.0 cc. 20 .mu./m.sup.2. day. atm at a temperature 20.degree. C. and a relative humidity 65%; and (C) said film having thermal shrinkages both in the machine direction and in a direction perpendicular thereto of not more than 1% at a temperature 250.degree. C. Said wholly aromatic polyester film can be produced by melt-extruding a wholly aromatic polyester to form into a film under conditions that a shear rate applied to the wholly aromatic polyester in a molten state at the exit of the molding die is not less than 500 sec.sup.-1.
    • 5. 发明授权
    • Method of purifying copper electrolytic solution
    • 铜电解液净化方法
    • US5783057A
    • 1998-07-21
    • US804558
    • 1997-02-24
    • Masatoshi TomitaHiroshi HiaiToshinori Ishii
    • Masatoshi TomitaHiroshi HiaiToshinori Ishii
    • C25C1/12C25C7/06C25D21/18
    • C25C7/06C25C1/12Y02P10/212
    • A method of purifying a copper electrolytic solution circulated in a copper electrorefining system, wherein a portion of the solution is withdrawn and recycled to the system after purification treatment. The purification treatment includes the addition of a hydrosulfide to the withdrawn solution to generate only the necessary quantity of hydrogen sulfide gas required in the reaction. The hydrogen sulfide gas generated is utilized for purification treatment. One process comprises dividing the solution withdrawn into two portions. Sodium hydrosulfide is added to the first portion to precipitate and separate metals as sulfides. Excess sodium hydrosulfide is further added to the first portion for reaction with residual sulfuric acid in the solution to generate hydrogen sulfide gas, then contacting the second divided portion with the hydrogen sulfide gas thus produced to precipitate and separate metals in the form of sulfides. The filtrate is then recycled to an electrorefining system. There is also provided a process comprising contacting the solution with hydrogen sulfide gas to separate and remove Cu, As, Sb and Bi in the form of sulfides from the solution, then dividing the solution into two portions; The first portion is recycled to the electrorefining system, whereas excess sodium hydrosulfide is added to the second portion to separate and recover Ni as nickel sulfide from the solution. Resultant hydrogen sulfide gas is used for contact with solution to be treated.
    • 一种纯化在铜电解精炼系统中循环的铜电解液的方法,其中一部分溶液在净化处理后被抽出并再循环至系统。 净化处理包括向所提取的溶液中加入氢硫化物以仅产生反应所需的必需量的硫化氢气体。 产生的硫化氢气体用于净化处理。 一个方法包括将溶液分离成两部分。 将氢硫化钠加入到第一部分以沉淀并分离作为硫化物的金属。 进一步向第一部分加入过量的氢硫化钠以与溶液中的残余硫酸反应以产生硫化氢气体,然后使第二分开部分与由此产生的硫化氢气体接触以沉淀并分离硫化物形式的金属。 然后将滤液再循环至电解精炼系统。 还提供了一种方法,其包括使溶液与硫化氢气体接触,从溶液中分离并除去硫化物形式的Cu,As,Sb和Bi,然后将溶液分成两部分; 将第一部分再循环至电解精炼系统,而将过量的氢硫化钠加入到第二部分中以从溶液中分离和回收作为硫化镍的Ni。 所得硫化氢气体用于与待处理溶液接触。