Chip-type varistor
    3.
    发明授权
    Chip-type varistor 失效
    片式压敏电阻

    公开(公告)号:US4660017A

    公开(公告)日:1987-04-21

    申请号:US828713

    申请日:1986-02-12

    IPC分类号: H01C7/10 H01C7/102

    CPC分类号: H01C7/102

    摘要: At least two platelike electrodes are arranged on the two major surfaces of a platelike varistor element having rounded sides and corners. A pair of external electrodes are formed on the two major surfaces and are connected to the platelike electrodes. The platelike electrodes partially overlap each other. The portion of the varistor element, sandwiched between the overlapping portions of the electrodes, provides varistor characteristics.

    摘要翻译: 在具有圆形侧面和角部的板状可变电阻元件的两个主表面上布置至少两个平板状电极。 一对外部电极形成在两个主表面上并连接到板状电极。 板状电极部分重叠。 夹在电极的重叠部分之间的可变电阻元件的部分提供压敏电阻特性。

    Steel substrate electroplated with Al powder dispersed in Zn
    4.
    发明授权
    Steel substrate electroplated with Al powder dispersed in Zn 失效
    钢基体电镀,分散在Zn中的Al粉末

    公开(公告)号:US4036600A

    公开(公告)日:1977-07-19

    申请号:US690737

    申请日:1976-05-27

    摘要: A composite zinc-aluminum dispersion plated steel sheet and a method of producing same are disclosed. The plated steel sheet comprises an electrolytical zinc plated layer containing 1.5 to 70% by weight of aluminum dispersed therein. The method comprises adding aluminum powder to an electrolytical zinc plating bath composition, dispersing the aluminum powder into the plating bath to provide a composite zinc-aluminum dispersion plating bath, and electrolytical treating a steel sheet in the composite zinc-aluminum dispersion plating bath while agitating it. The plated steel sheet enhances corrosion resistances and does not show any spangles which impair the appearances after subsequent painting of the plated steel sheet.

    摘要翻译: 公开了一种复合锌铝分散镀钢板及其制造方法。 电镀钢板包含分散在其中的铝的1.5〜70重量%的电解镀锌层。 该方法包括向电解镀锌浴组合物中加入铝粉,将铝粉分散在镀浴中以提供复合的锌 - 铝分散体电镀浴,并在复合的锌 - 铝分散体电镀浴中电解处理钢板,同时搅拌 它。 电镀钢板增强了耐腐蚀性,并且在随后的镀覆钢板的喷涂之后没有显示损害外观的任何花边。

    Process for producing pivaloyl-acetic acid ester
    5.
    发明授权
    Process for producing pivaloyl-acetic acid ester 失效
    生产新戊酰乙酸酯的方法

    公开(公告)号:US06570035B2

    公开(公告)日:2003-05-27

    申请号:US09759134

    申请日:2001-01-16

    IPC分类号: C07C6966

    CPC分类号: C07C67/343 C07C69/716

    摘要: A process for producing a pivaloylacetic acid ester comprises reacting pivaloyl chloride with an acetoacetic acid ester of an alkyl group having 1 to 4 carbon atoms in the presence of at least one nitrogen-containing basic compound (a) selected from among pyridine compounds, N,N-dialkylanilines and imidazole compounds and from 0.01 to 0.5 mole equivalent, based on the pivaloyl chloride, of a magnesium compound (b) to thereby prepare a pivaloylacetoacetic acid ester and then alcholyzing or alkali-hydrolyzing the pivaloylacetoacetic acid ester to thereby give a pivaloylacetic acid ester having a high purity at a low cost.

    摘要翻译: 一种生产新戊酰乙酸酯的方法,包括在至少一种选自吡啶化合物,N,N-二甲基甲酰胺的含氮碱性化合物(a)的存在下,使新戊酰氯与具有1至4个碳原子的烷基的乙酰乙酸酯反应, N-二烷基苯胺和咪唑化合物,和基于新戊酰氯的0.01至0.5摩尔当量的镁化合物(b),从而制备新戊酰乙酰乙酸酯,然后将新戊酰乙酰乙酸酯进行共沸或碱解水解,从而得到新戊酰乙酸 酸酯以低成本具有高纯度。

    Process for producing 3-oxocarboxylic acid esters
    6.
    发明授权
    Process for producing 3-oxocarboxylic acid esters 失效
    3-氧代羧酸酯的制备方法

    公开(公告)号:US5945559A

    公开(公告)日:1999-08-31

    申请号:US862263

    申请日:1997-05-23

    CPC分类号: C07C67/343

    摘要: A novel process for producing 3-oxocarboxylic acid esters, which are useful as intermediates in the synthesis of ceramides to be used as a humectant, biodegradable polymers, drugs, etc., at a high purity and a high yield without requiring any troublesome procedure, is disclosed. The process comprises reacting an acetoacetic ester with a calcium compound, a barium compound or a strontium compound in the presence of an organic solvent at a temperature of 10 to 120.degree. C., further reacting the obtained product with a carboxylic acid chloride to thereby acylate it, and then adding thereto an alcohol in an amount 1 to 5 times by mol as much as the calcium compound, barium compound or strontium compound to thereby deacetylate the same.

    摘要翻译: 一种生产3-氧代羧酸酯的新方法,其可用作合成用作保湿剂的神经酰胺的中间体,可生物降解的聚合物,药物等以高纯度和高产率而不需要任何麻烦的方法, 被披露。 该方法包括在有机溶剂存在下,在10〜120℃的温度下使乙酰乙酸酯与钙化合物,钡化合物或锶化合物反应,进一步使得到的产物与羧酰氯反应,从而酰化 然后向其中加入与钙化合物,钡化合物或锶化合物一样多的1至5倍摩尔量的醇,从而使其脱乙酰化。

    Production of highly rust resistant tinplate sheets for welded cans
    7.
    发明授权
    Production of highly rust resistant tinplate sheets for welded cans 失效
    生产用于焊接罐的高度防锈的马口铁板

    公开(公告)号:US4468292A

    公开(公告)日:1984-08-28

    申请号:US384665

    申请日:1982-06-03

    摘要: A process for improving the rust and corrosion resistance of thinly coated tinplate is disclosed, wherein a steel sheet coated with 0.02-0.2 g/m.sup.2 of nickel prior to annealing is coated with 0.05-1.5 g/m.sup.2 of tin, subsequently being trated with 0.3-10 C/dm.sup.2 of chromate and then subjected to a treatment of melting tin (reflow). A layer of alloy thus formed is highly rust resistant and structurally different from any of those formed on thinly coated tinplate according to the prior art, so that highly rust resistant tinplate sheets for use in the manufacture of welded cans can be obtained.

    摘要翻译: 公开了一种用于提高薄涂马口铁的耐锈蚀和耐腐蚀性的方法,其中在退火前涂覆有0.02-0.2g / m 2的镍的钢板涂覆有0.05-1.5g / m2的锡,随后用0.3 -10℃/ dm 2的铬酸盐,然后进行熔融锡(回流)的处理。 这样形成的合金层是高度防锈的,并且在结构上不同于根据现有技术的薄镀锡马口铁上形成的那些,从而可以获得用于制造焊接罐的高度防锈的马口铁板。

    Method of producing tin-free steel sheets
    9.
    发明授权
    Method of producing tin-free steel sheets 失效
    生产无锡钢板的方法

    公开(公告)号:US4579633A

    公开(公告)日:1986-04-01

    申请号:US498547

    申请日:1983-05-26

    IPC分类号: C25D11/38 C25D5/48

    CPC分类号: C25D11/38 Y10S205/917

    摘要: Tin-free steel sheets having intimately bonded metallic chromium and hydrated chromium oxide coatings thereon and possessing improved resistance to retorting treatment and improved adhesion to paint films to be applied thereon are produced by chromium plating a steel sheet in a chromium plating bath containing an assistant to deposit and form metallic chromium and hydrated chromium oxide coatings on the sheet surface, subjecting the sheet to reverse electrolysis in the same chromium plating bath to partially dissolve away the metallic chromium and hydrated chromium oxide coatings together with the assistant anions codeposited in the hydrated chromium oxide coating, rinsing the sheet with water, and thereafter subjecting the sheet to an electrolytic chromate treatment in an electrolytic chromate treating bath.

    摘要翻译: 通过在包含辅助剂的铬电镀浴中镀铬钢板,在其上具有紧密结合的金属铬和水合氧化铬涂层的无铅钢板,并且具有改进的抗蒸馏处理能力和改进的与涂覆在其上的漆膜的粘附性 沉积并在片材表面上形成金属铬和水合氧化铬涂层,使片材在相同的镀铬浴中反向电解,以将金属铬和水合氧化铬涂层与共沉积在水合氧化铬中的辅助阴离子一起部分溶解掉 涂布,用水冲洗片材,然后在电解铬酸盐处理浴中对片材进行电解铬酸盐处理。

    Method of producing highly corrosion resistant tin-plated steel sheet
    10.
    发明授权
    Method of producing highly corrosion resistant tin-plated steel sheet 失效
    生产高耐腐蚀镀锡钢板的方法

    公开(公告)号:US4104135A

    公开(公告)日:1978-08-01

    申请号:US601516

    申请日:1975-08-04

    摘要: A method of producing a highly corrosion resistant tin-plated steel sheet is disclosed by which a metal or alloy coating having a thickness from 0.005.mu. to 0.5.mu. and selected from the class consisting of Ni, Cu and Ni-Sn alloy is plated upon a steel sheet. The thus plated steel sheet is heated in a non-oxidizing atmosphere to such an extent that said plated coating is penetrated and diffused into the steel sheet whereby a reformed steel sheet surface where said plating coating is disappeared is secured. A tin coating is then plated upon said reformed steel sheet surface. This reformed steel sheet surface is sandwiched between the plating tin coating and the steel sheet and contributes greatly to corrosion resistant property of the tin-plated steel sheet.

    摘要翻译: 公开了一种制造耐腐蚀性优异的镀锡钢板的方法,通过该方法,将厚度为0.005μm至0.5μm的金属或合金涂层从由Ni,Cu和Ni-Sn合金组成的类别中镀覆在 钢板。 将这样电镀的钢板在非氧化性气氛中加热到使镀层被渗透扩散到钢板中的程度,由此确保了镀层消失的重整钢板表面。 然后将锡涂层镀在所述重整钢板表面上。 这种改性钢板表面被夹在镀锡涂层和钢板之间,并且对镀锡钢板的耐腐蚀性有很大贡献。