Preparation of .alpha.-keto acid ester
    1.
    发明授权
    Preparation of .alpha.-keto acid ester 失效
    α-酮酸酯的制备

    公开(公告)号:US5523459A

    公开(公告)日:1996-06-04

    申请号:US410917

    申请日:1995-03-27

    IPC分类号: C07C67/313 C07C69/76

    CPC分类号: C07C67/313

    摘要: A process for preparing an .alpha.-keto acid ester (oxo acid) of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, aliphatic alkyl group of 1-6 carbon atoms, phenyl group or benzyl group, and R.sup.2 is an aliphatic alkyl group of 1-6 carbon atoms, which comprises causing an .alpha.-hydroxycarboxylic acid ester of the formula: ##STR2## to react with molecular oxygen in a gaseous phase in the presence of copper phosphate, possibly, mounted on a solid carrier.

    摘要翻译: 制备下式的α-酮酸酯(含氧酸)的方法:其中R1是氢原子,1-6个碳原子的脂族烷基,苯基或苄基,R2是脂族烷基 1-6个碳原子的基团,其包括使得在磷酸铜存在下使气态的分子氧与下列分子式的α-羟基羧酸酯反应:可能地,其安装在固体载体上。

    Method of producing a glycolic acid ester
    2.
    发明授权
    Method of producing a glycolic acid ester 失效
    乙醇酸酯的制备方法

    公开(公告)号:US5455372A

    公开(公告)日:1995-10-03

    申请号:US209386

    申请日:1994-03-10

    IPC分类号: C07C67/31 C07C69/675

    CPC分类号: C07C67/31

    摘要: A glycolic acid ester is produced by hydrogenating an oxalic acid diester of the formula, (COOR).sub.2, wherein R is a C.sub.1-6 alkyl group, with hydrogen in the presence of a solid catalyst comprising, for example, copper and silver metals carried on a solid carrier, and in the additional presence of an aliphatic alcohol, and collecting the resultant glycolic acid ester from the reaction mixture by distillation, preferably in the presence of an ester of a C.sub.3-12 dicarboxylic acid.

    摘要翻译: 通过在包含例如铜和银金属的固体催化剂的存在下氢气将式(COOR)2的(COOR)2(其中R为C 1-6烷基)与氢气氢化而制备的乙醇酸酯 在固体载体上,另外存在脂族醇,并通过蒸馏,优选在C3-12二羧酸的酯存在下从反应混合物中收集生成的乙醇酸酯。

    Elastic members for inkjet recording apparatus ink tanks and inkjet recording apparatus
    4.
    发明授权
    Elastic members for inkjet recording apparatus ink tanks and inkjet recording apparatus 有权
    用于喷墨记录装置的墨盒和喷墨记录装置的弹性构件

    公开(公告)号:US06981762B2

    公开(公告)日:2006-01-03

    申请号:US10470535

    申请日:2002-01-31

    IPC分类号: B41J2/175

    摘要: The elastic member for an ink jet recording apparatus according to the present invention is formed from: (1) a thermoplastic elastomer composition comprising 100 parts by weight of (a) a hydrogenated block copolymer, 60 to 170 parts by weight of (b) a softening agent for a non-aromatic rubber and 5 to 30 parts by weight of (c) polypropylene, (2) a thermoplastic elastomer composition in which a network structure having a pore diameter of 50 μm or less is formed, comprising 100 parts by weight of (a) a hydrogenated block copolymer, 60 to 170 parts by weight of (b) a softening agent for a non-aromatic rubber and 5 to 30 parts by weight of (c) crystalline polyolefin, or (3) a thermoplastic elastomer composition in which a shear rate dependency of a melt viscosity measured by means of a capillograph is −1.5 to −0.8, comprising 100 parts by weight of (a) a hydrogenated block copolymer, 60 to 170 parts by weight of (b) a softening agent for a non-aromatic rubber and 5 to 30 parts by weight of (c) crystalline polyolefin. The elastic member of the present invention is used as an ink tank valve, a sealing member for an ink tank and a sealing member for preventing an ink from leaking from a recording head.

    摘要翻译: 根据本发明的喷墨记录装置用弹性构件由以下部分形成:(1)热塑性弹性体组合物,其包含100重量份的(a)氢化嵌段共聚物,60〜170重量份的(b) 非芳香族橡胶用软化剂和(c)聚丙烯5〜30重量份,(2)形成孔径为50μm以下的网状结构的热塑性弹性体组合物,其含有100重量份 (a)氢化嵌段共聚物,60〜170重量份(b)非芳香族橡胶用软化剂和5〜30重量份(c)结晶性聚烯烃,或(3)热塑性弹性体组合物 其中通过电泳法测量的熔体粘度的剪切速率依赖性为-1.5至-0.8,包含100重量份的(a)氢化嵌段共聚物,60至170重量份的(b)软化剂 非芳香族橡胶和5〜30重量份o f(c)结晶聚烯烃。 本发明的弹性构件用作墨水罐阀,用于墨水容器的密封构件和用于防止墨水从记录头泄漏的密封构件。

    Thermoplastic elastomer composition and gasket material
    5.
    发明授权
    Thermoplastic elastomer composition and gasket material 有权
    热塑性弹性体组合物和垫片材料

    公开(公告)号:US06399696B1

    公开(公告)日:2002-06-04

    申请号:US09505683

    申请日:2000-02-17

    IPC分类号: C08L5302

    摘要: There are disclosed a thermoplastic elastomer composition which comprises (a) a hydrogenated block copolymer obtained by hydrogenating the block copolymer comprising at least one polymer block composed principally of a vinylic aromatic compound and at least one polymer block composed principally of a conjugated diene compound; (b) a non-aromatic base softening agent having a kinematic viscosity at 40° C. of at least 100 mm2/sec; and (c) propylene homopolymer and/or propylene copolymer comprising propylene as a principal component which is obtained through polymerization by using a metallocene catalyst, which is free from a lubricant, which has been heat treated, or which has a MFR (melt flow rate) in a specific range; a gasket material which comprises the above thermoplastic elastomer composition and is particularly suited for use in hard disc units because of its excellent sealing properties and its capability of preventing gas generation; a method for injection molding the above composition; an external anti-sticking agent for a thermoplastic elastomer or rubber which comprises fine particulates of ultrahigh molecular weight polyethylene having an average particle diameter in a specific range, and which is minimized in hygroscopicity, oil absorptivity and volatility, and has high heat resistance and anti-stickiness; and rubber and/or a thermoplastic elastomer which is incorporated with the above external anti-sticking agent and imparted with anti-stickiness.

    摘要翻译: 公开了一种热塑性弹性体组合物,其包含(a)通过氢化嵌段共聚物而获得的氢化嵌段共聚物,所述嵌段共聚物包含至少一种主要由乙烯基芳族化合物组成的聚合物嵌段和至少一种主要由共轭二烯化合物组成的聚合物嵌段; (b)在40℃下的运动粘度为至少100mm 2 /秒的非芳族基础软化剂; 和(c)丙烯均聚物和/或丙烯共聚物,其包含丙烯作为主要成分,其通过使用没有经过热处理的润滑剂的茂金属催化剂聚合获得,或者具有MFR(熔体流动速率 )在特定范围内 包含上述热塑性弹性体组合物的垫圈材料,特别适用于硬盘单元,因为其具有优异的密封性能和防止产生气体的能力; 注射成型上述组合物的方法; 用于热塑性弹性体或橡胶的外部防粘剂,其包含平均粒径在特定范围内的超高分子量聚乙烯的微细颗粒,并且吸湿性,吸油性和挥发性最小化,并且具有高的耐热性和抗反射性 -粘性; 以及与上述外部防粘剂结合并赋予防粘性的橡胶和/或热塑性弹性体。