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    • 11. 发明申请
    • CEMENT ADMIXTURE
    • US20090054557A1
    • 2009-02-26
    • US11816983
    • 2006-03-29
    • Hiroshi YamazakiTsuyoshi HirataAkihiko Yamashita
    • Hiroshi YamazakiTsuyoshi HirataAkihiko Yamashita
    • C04B24/04
    • C04B24/2605C04B40/0039C04B2103/302C04B2103/308C08F290/00C08F290/06C08L33/14C08L53/00C08L53/005C04B28/02C08L2666/04C08L2666/02C04B24/2647
    • The present invention aims at providing a cement admixture having superior water-reducing performance, along with no decrease in slump and slump flow caused by decrease in fluidity of a cement composition over time. A cement admixture is to be provided, which cement admixture comprises two or more members of polycarboxylic acid-based polymers, wherein said cement admixture comprises at least one polycarboxylic acid-based polymer (A) having a constitutional unit represented by the following formula (1): wherein R1 and R2 independently represent a hydrogen atom, an alkyl group with carbon atoms of 1 to 30, an alkenyl group with carbon atoms of 1 to 30, an aryl group with carbon atoms of 6 to 12; A represents an alkylene group with carbon atoms of 1 to 30 or an arylene group with carbon atoms of 6 to 12; a is 0 or 1; OR3 represents an oxyalkylene group with carbon atoms of 2 to 18, wherein each OR3 may be the same or different each other, provided that when OR3 is in a mixed form of two or more members, each OR3 may be added in a block or random form; R4 represents a hydrogen atom or a hydrocarbon group with carbon atoms of 1 to 30; and m represents an average mole number of oxyalkylene groups added and is in the range of 1 to 300; and at least one polycarboxylic acid-based polymer (B) having a constitutional unit represented by the following formula (2): wherein R5 and R6 independently represent a hydrogen atom, a methyl group; x is an integer in the range of 0 to 2 and y is 0 or 1, provided that x and y are not 0 at the same time; OR7 represents an oxyalkylene group with carbon atoms of 2 to 18, wherein each OR7 may be the same or different each other, provided that when OR7 is in a mixed form of two or more members, each OR7 may be added in a block or random form; R8 represents a hydrogen atom or a hydrocarbon group with carbon atoms of 1 to 30; and n represents an average mole number of oxyalkylene groups added and is in the range of 1 to 300; and the weight ratio of said polycarboxylic acid-based polymer (A) and said polycarboxylic acid-based polymer (B) [weight ratio of (A)/(B)] is in the range of 1/99 to 99/1.
    • 12. 发明申请
    • Method For Production Of Cement Dispersant And Polycarboxylic Acid Type Polymer For Cement Dispersant
    • 水泥分散剂和聚羧酸类聚合物水泥分散剂生产方法
    • US20070254976A1
    • 2007-11-01
    • US11631694
    • 2005-07-11
    • Tsuyoshi HirataHirokatsu Kawakami
    • Tsuyoshi HirataHirokatsu Kawakami
    • C08F220/06C04B24/26
    • C04B24/2647C04B2103/408C08F216/14C08F220/06
    • The efficiency of production of the polycarboxylic acid type cement dispersant is exalted. Photo-polymerization is adopted in the production of the polycarboxylic acid type cement dispersant by polymerizing at least one kind of monomer represented by the chemical formula 1 and at least one kind of monomer represented by the chemical formula 2. A polymer composition having a small solvent content is obtained by causing the polymerization reaction to proceed under the condition of containing the monomers at a high concentration. Specifically, this invention is directed toward a method for producing a powdered polycarboxylic acid type cement dispersant, which method comprises a step of polymerizing the monomers under the condition of containing the monomers at a concentration of 50-100 mass % based on the total mss of the monomers and the solvent, a step of cooling the formed polymer thereby solidifying the polymer, and a step of pulverizing the solidified polymer.
    • 提高了多元羧酸型水泥分散剂的生产效率。 通过聚合由化学式1表示的至少一种单体和由化学式2表示的至少一种单体,聚羧酸型水泥分散剂的制备中采用光聚合。具有小溶剂的聚合物组合物 通过使聚合反应在含有高浓度单体的条件下进行,得到含量。 具体地说,本发明涉及一种粉末状多元羧酸型水泥分散剂的制造方法,其特征在于,在单体浓度为50〜100质量%的条件下,以单体总量mss 单体和溶剂,冷却形成的聚合物从而使聚合物固化的步骤和粉碎固化的聚合物的步骤。
    • 15. 发明授权
    • Cement admixture and cement composition
    • 水泥外加剂和水泥组成
    • US06911494B2
    • 2005-06-28
    • US10253425
    • 2002-09-25
    • Akihiko YamashitaHiromichi TanakaTsuyoshi HirataToru UnoYoshiyuki Onda
    • Akihiko YamashitaHiromichi TanakaTsuyoshi HirataToru UnoYoshiyuki Onda
    • C04B24/26C04B24/32C08G65/26C08G65/332C08L71/02C08L31/02
    • C04B24/2647C04B2103/308C04B2103/32C08G65/2609C08G65/3322C08L71/02C08L2205/05C08L2666/04
    • It is an object of the present invention to provide a cement admixture which can show not only a high dispersing ability and a slump loss preventing effect but also a viscosity reducing effect and can show these characteristics even in the high water reduction ratio range, and a cement composition in which this admixture is used.A cement admixture comprising, as three essential constituents, a copolymer (A), an unsaturated (poly)alkylene glycol ether monomer (a) and an unpolymerizable (poly)alkylene glycol (B) not containing an alkenyl group, wherein the content of the unsaturated (poly)alkylene glycol ether monomer (a) is 1 to 100% by mass relative to the copolymer (A) and the content of the unpolymerizable (poly)alkylene glycol (B) not containing an alkenyl group is 1 to 50% by mass relative to the copolymer (A), the copolymer (A) comprising, as essential constituent units, a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from an unsaturated carboxylic acid monomer (b), with the constituent unit (I) and constituent unit (II) each accounting for not less than 1% by mass based on all the constituent units, and the unsaturated carboxylic acid monomer (b) being an unsaturated monocarboxylic acid monomer.
    • 本发明的目的是提供一种能够显示出高的分散能力和防止坍落度损失的作用的水泥混合物,而且还能够降低粘度,并且即使在高的减水率范围内也能够显示出这些特性, 使用该混合物的水泥组合物。 一种水泥外加剂,其包含不含烯基的共聚物(A),不饱和(聚)亚烷基二醇醚单体(a)和不可聚合(聚)亚烷基二醇(B)作为三种必需成分,其中, 不饱和(聚)亚烷基二醇醚单体(a)相对于共聚物(A)为1〜100质量%,不含烯基的不可聚合(聚)亚烷基二醇(B)的含量为1〜50% 相对于共聚物(A)的共聚物(A),作为必要构成单元的共聚物(A),由不饱和(聚)亚烷基二醇醚单体(a)得到的构成单元(I)和由 不饱和羧酸单体(b)与构成单元(I)和构成单元(II)各自占所有构成单元不少于1质量%,不饱和羧酸单体(b)为 不饱和一元羧酸单体。
    • 16. 发明申请
    • Production processes for alkylene oxide addition product and its derivatives
    • 烯化氧加成产物及其衍生物的生产方法
    • US20050080298A1
    • 2005-04-14
    • US10500554
    • 2003-05-02
    • Toru InaokaYoshiyuki OndaHiromichi TanakaTsuyoshi Hirata
    • Toru InaokaYoshiyuki OndaHiromichi TanakaTsuyoshi Hirata
    • C08F299/02C08G65/26C08G65/28C08G65/332C07C67/26C08G59/14
    • C08G65/2609C08G65/2696C08G65/3322
    • The present invention provides: a production process for an alkylene oxide addition product, by which a high-molecular alkylene oxide addition product can be obtained with ordinary production facilities while the formation of by-products is suppressed; and production processes for derivatives from the alkylene oxide addition product. The present invention production process for an alkylene oxide addition product comprises the step of carrying out an addition reaction of an alkylene oxide to a hydroxyl-group-containing saturated compound in order to obtain the alkylene oxide addition product; with the production process being characterized by further comprising: the initial step of causing the alkylene oxide to add to the hydroxyl-group-containing saturated compound in an amount of not larger than 20 mols on average of the alkylene oxide per 1 mol of the hydroxyl-group-containing saturated compound to thereby obtain an alkylene oxide low-mol-addition product; and the molar-degree-of-polyaddition-adjusting step of causing the alkylene oxide to further add to the alkylene oxide low-mol-addition product as obtained in the initial step; wherein a portion of the entirety of the alkylene oxide low-mol-addition product as obtained in the initial step is used in the molar-degree-of-polyaddition-adjusting step.
    • 本发明提供:一种环氧烷加成物的制造方法,通过该方法可以获得具有普通生产设备的高分子量烯化氧加成产物,同时抑制副产物的形成; 以及来自烯化氧加成产物的衍生物的制备方法。 本发明的烯化氧加成产物的制备方法包括进行烯化氧与含羟基的饱和化合物的加成反应以获得环氧烷烃加成产物的步骤; 其制备方法的特征还在于:使每1摩尔羟基的烯化氧的平均相对于含有羟基的饱和化合物不少于20摩尔的环氧烷加成的初始步骤 含有饱和化合物,得到环氧烷低摩尔加成产物; 和加成摩尔加聚度调整步骤,使得氧化烯进一步添加到初始步骤中获得的环氧烷低摩尔加成产物; 其中在初始步骤中获得的全部烯化氧低摩尔加成产物的一部分用于加聚度加聚步骤。
    • 17. 发明授权
    • Acrylic acid (salt) polymer, its production process and uses
    • 丙烯酸(盐)聚合物,其生产工艺和用途
    • US06794473B2
    • 2004-09-21
    • US10126587
    • 2002-04-22
    • Shigeru YamaguchiTsuyoshi HirataShorbu Shioji
    • Shigeru YamaguchiTsuyoshi HirataShorbu Shioji
    • C08F12400
    • C08F20/06
    • The present invention provides: an acrylic acid (salt) polymer, which has a low molecular weight and a narrow molecular weight distribution and can display excellent dispersibility, or which has a high molecular weight and a high water solubility; a production process that enables easy production of this polymer; and an acrylic acid (salt) polymer composition comprising this polymer. The acrylic acid (salt) polymer is an acrylic acid (salt) polymer of which not less than 1 weight % of the entirety is accounted for by an acrylic acid (salt) polymer having a specific terminal structure. In addition, the production process for an acrylic acid (salt) polymer comprises the step of carrying out polymerization of a monomer component including an acrylic acid (salt), wherein an acrylic acid (salt) having a furfural content of 200 to 400 weight ppm is used as at least a portion of the acrylic acid (salt) in an amount of not smaller than 10 weight % of the entire monomer component.
    • 本发明提供:具有低分子量和窄分子量分布且可显示优异分散性或具有高分子量和高水溶性的丙烯酸(盐)聚合物; 能够容易地生产该聚合物的制造方法; 和包含该聚合物的丙烯酸(盐)聚合物组合物。 丙烯酸(盐)聚合物是丙烯酸(盐)聚合物,其不小于整体的1重量%由具有特定末端结构的丙烯酸(盐)聚合物占据。 此外,丙烯酸(盐)聚合物的制备方法包括进行包含丙烯酸(盐)的单体组分的聚合的步骤,其中糠醛含量为200-400重量ppm的丙烯酸(盐) 用作至少一部分丙烯酸(盐),其量不小于整个单体成分的10重量%。