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    • 5. 发明授权
    • Process for stabilizing oxymethylene copolymer
    • 稳定甲醛共聚物的方法
    • US06365655B1
    • 2002-04-02
    • US09367288
    • 1999-08-16
    • Noritaka TanimuraHajime NagaharaTadashi TanakaSatoru Ohtsuki
    • Noritaka TanimuraHajime NagaharaTadashi TanakaSatoru Ohtsuki
    • C08K517
    • C08G2/28C08K5/19C08L59/04
    • Disclosed is a method for stabilizing a crude oxy-methylene copolymer having thermally unstable terminal groups, which comprises subjecting a crude oxymethylene copolymer to heat treatment in the presence of at least one quaternary ammonium compound represented by the following formula (1): [R1R2R3R4N+]nX−n  (1) wherein each of R1, R2, R3 and R4 independently represents an unsubstituted or substituted alkyl group, an aryl group, an aralkyl group which is an unsubstituted or substituted alkyl group substituted with at least one aryl group, or an alkylaryl group which is an aryl group substituted with at least one unsubstituted or substituted alkyl group; n is an integer of from 1 to 3; and X is a hydroxyl group or an acid residue. In this method, even by the addition of a very small amount of the quaternary ammonium compound, the decomposition rate of the unstable terminal groups can be remarkably increased, thereby facilitating the stabilization of the crude copolymer. Therefore, by this method, it has become possible to easily produce an excellent oxymethylene copolymer within a short period of time, which has substantially no unstable terminal groups and, therefore, has excellent thermal stability and color tone.
    • 本发明公开了一种稳定具有热不稳定端基的粗氧亚甲基共聚物的方法,其包括在至少一种由下式(1)表示的季铵化合物存在下使粗甲醛共聚物进行热处理:其中, R1,R2,R3和R4独立地表示未取代或取代的烷基,芳基,被至少一个芳基取代的未取代或取代的烷基的芳烷基或作为被至少一个芳基取代的芳基的烷基芳基 至少一个未取代或取代的烷基; n为1〜3的整数, X为羟基或酸残基。 在该方法中,即使加入极少量的季铵化合物,也能够显着提高不稳定末端基的分解速度,从而有助于粗共聚物的稳定化。 因此,通过该方法,可以在短时间内容易地制造优异的甲醛共聚物,其基本上不具有不稳定的端基,因此具有优异的热稳定性和色调。
    • 7. 发明授权
    • Aluminum alloy bearing
    • 铝合金轴承
    • US5453244A
    • 1995-09-26
    • US337140
    • 1994-11-10
    • Tadashi TanakaMasaaki SakamotoTohru KatoYoshiaki Sato
    • Tadashi TanakaMasaaki SakamotoTohru KatoYoshiaki Sato
    • C22C21/00C22C21/02C22C21/04C22C21/10F16C33/12
    • C22C21/003C22C21/02C22C21/04C22C21/10F16C33/121Y10T428/12701Y10T428/12757Y10T428/12764Y10T428/12951
    • There is disclosed a novel aluminum alloy bearing which exhibits a more excellent fatigue resistance than conventional bearings even under such conditions of use as at a high temperature and under a high load. The aluminum alloy bearing has an aluminum bearing alloy layer containing, by weight, 1 to 10% Zn, 0.1 to 5% Cu, 0.05 to 3% Mg, 0.1 to 2% Mn, 0.1 to 5% Pb, 0.1 to 2% V, and 0.03 to 0.5% in total of Ti--B, and further may optionally contain not more than 8% Si, 0.05 to 0.5% Sr, and Ni, Co and Cr. The alloy may be bonded to a steel metal back sheet, and a surface layer may be formed on the surface of the bearing. By use of the composition of the alloy of the invention, the fatigue resistance of the aluminum alloy bearings has been improved, and such an improved bearing can fully achieve a bearing performance even under severe conditions of use as at high temperature and under a high load.
    • 公开了一种新颖的铝合金轴承,即使在高温和高负载下的使用条件下,也能表现出比传统轴承更优异的耐疲劳性能。 铝合金轴承具有铝合金轴承合金层,其含有1〜10%的Zn,0.1〜5%的Cu,0.05〜3%的Mg,0.1〜2%的Mn,0.1〜5%的Pb,0.1〜2%的V ,Ti-B总计为0.03〜0.5%,进一步含有8%以下的Si,0.05〜0.5%的Sr,Ni,Co,Cr。 该合金可以结合到钢金属背板上,并且可以在轴承的表面上形成表面层。 通过使用本发明的合金组成,铝合金轴承的耐疲劳性得到改善,即使在高温和高负载下的苛刻使用条件下,这种改进的轴承也能充分获得轴承性能 。
    • 9. 发明授权
    • Automatic photofinishing apparatus
    • 自动洗印装置
    • US5436688A
    • 1995-07-25
    • US141531
    • 1993-10-27
    • Tadashi Tanaka
    • Tadashi Tanaka
    • G03B27/46G03B27/32G03B27/62G03D3/00G03D13/00G03D3/08
    • G03B27/32
    • An automatic photofinishing apparatus has a film processing section, which processes exposed photographic film, and includes a train of processing baths. The film is passed successively through processing solutions respectively within the processing baths. A printer section, downstream from the film processing section, prints an imaging frame of the film to photographic paper immediately after processing of the film. A paper processing section processes the paper after printing, and includes a train of processing baths. The paper is passed successively through processing solutions respectively within the processing baths, so as to produce photographic prints. A film path member is disposed between the film processing section and the printer section, and constructed to twist the film during an exit from the film processing section in accordance with a direction of the film processing section relative to the paper processing section, and to bring the film in parallel with the paper in the printer section.
    • 自动洗印装置具有处理曝光的照相胶片的胶片处理部分,并且包括一列处理槽。 该胶片分别通过加工液中的处理液依次通过。 在胶片处理部分的下游的打印机部分,在胶片处理之后立即将胶片的成像框打印到相纸上。 纸张处理部在打印之后处理纸张,并且包括一列处理槽。 纸张分别通过加工液中的处理液依次通过,以便制造照相印刷品。 薄膜通道构件设置在薄膜处理部分和打印机部分之间,并被构造成根据薄膜处理部分相对于纸张处理部分的方向在胶片处理部分出射期间扭曲胶片,并带来 该胶片与打印机部分中的纸张并行。