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    Process for producing N-substituted formamides
    1.
    发明授权
    Process for producing N-substituted formamides 失效
    N-取代甲酰胺的制备方法

    公开(公告)号：US4567300A

    公开(公告)日：1986-01-28

    申请号：US690252

    申请日：1985-01-10

    申请人： Yoshikazu Murao ,  Shigeru Sawayama ,  Kohichi Satoh

    发明人： Yoshikazu Murao ,  Shigeru Sawayama ,  Kohichi Satoh

    IPC分类号： C07C231/22 ,  C07C233/18 ,  C07C103/127

    CPC分类号： C07C231/22 ,  C07C233/18

    摘要： Disclosed herein is a process for producing N-substituted formamide represented by the formula: ##STR1## wherein R represents a hydrogen atom or a residual radical of a primary or secondary alcohol, comprising the steps of reacting formamide with acetaldehyde in the presence of a basic catalyst and if required, further reacting the thus formed product, N-(.alpha.-hydroxyethyl)formamide, with a primary or secondary alcohol in the presence of an acid catalyst.

    摘要翻译： 本文公开了一种制备由下式表示的N-取代甲酰胺的方法：其中R表示氢原子或伯醇或仲醇的残余基团，包括以下步骤：使甲酰胺与乙醛在碱存在下反应 催化剂，如果需要，在酸催化剂存在下，使如此形成的产物N-（α-羟乙基）甲酰胺与伯醇或仲醇进一步反应。

    Process for preparing water-soluble polymer
    2.
    发明授权
    Process for preparing water-soluble polymer 失效
    制备水溶性聚合物的方法

    公开(公告)号：US4824913A

    公开(公告)日：1989-04-25

    申请号：US46382

    申请日：1987-05-06

    申请人： Yoshikazu Murao ,  Shigeru Sawayama ,  Kohichi Satoh

    发明人： Yoshikazu Murao ,  Shigeru Sawayama ,  Kohichi Satoh

    IPC分类号： C08F8/12 ,  C08F8/44 ,  C08J3/12 ,  C08F8/10

    CPC分类号： C08J3/12 ,  C08F8/44 ,  C08J2339/00

    摘要： Disclosed herein is a process for preparing a water-soluble polymer, which comprises granulating a hydrous gel-like polymer obtained by polymerizing N-vinylformamide in the form of an aqueous solution of which a monomer concentration is 20 to 60% by weight, dispersing the formed polymer particles in methanol and contacting them with an aqueous solution of ammonium salt of a monovalent acid in an amount of 1 to 200% by mole based on the formamide groups in said polymer, thereby partially modifying the formamide groups in the polymer.

    摘要翻译： 本文公开了一种制备水溶性聚合物的方法，其包括将通过以单体浓度为20至60重量％的水溶液的形式聚合N-乙烯基甲酰胺而获得的含水凝胶状聚合物，将 在甲醇中形成聚合物颗粒，并与基于所述聚合物中的甲酰胺基团的1至200摩尔％的量的一价酸的铵盐水溶液接触，从而部分改性聚合物中的甲酰胺基团。

    Coagulant for minute mineral particles in suspension and method for coagulating thereof
    4.
    发明授权
    Coagulant for minute mineral particles in suspension and method for coagulating thereof 失效
    悬浮液中微量矿物颗粒的凝结剂及其凝结方法

    公开(公告)号：US4783270A

    公开(公告)日：1988-11-08

    申请号：US115160

    申请日：1987-10-30

    申请人： Yoshikazu Murao ,  Shigeru Sawayama ,  Kenji Mori

    发明人： Yoshikazu Murao ,  Shigeru Sawayama ,  Kenji Mori

    IPC分类号： B01D21/01 ,  C02F1/54 ,  C02F1/56 ,  C08F20/00 ,  C08F20/52 ,  C08F220/58 ,  C09K3/00

    CPC分类号： C02F1/54 ,  Y10S210/907

    摘要： Disclosed herein are a coagulant for minute mineral particles in suspension, comprising a copolymer of 0.5 to 10 mol % of 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, 40 to 99.5 mol % of N-hydroxymethylacrylamide and 0 to 59.5 mol % of acrylamide and showing a reduced viscosity of 10 to 30 dl/g in an aqueous 1N solution of sodium chloride at a temperature of 25.degree. C. and a concentration of the copolymer of 0.1 g/dl therein, and a method for coagulating the minute mineral particles in a suspension, comprising adding the coagulant a neutral waste water.

    摘要翻译： 本文公开了一种用于悬浮液中的微小矿物颗粒的凝结剂，其包含0.5至10摩尔％的2-丙烯酰胺基-2-甲基丙磺酸或其盐，40至99.5摩尔％的N-羟甲基丙烯酰胺和0至59.5摩尔％ 的丙烯酰胺，并且在1N氯化钠水溶液中在25℃的温度和共聚物的浓度为0.1g / dl的浓度下显示10至30dl / g的比浓粘度，以及使分钟 悬浮液中的矿物颗粒，包括将絮凝剂加入中性废水中。

    Vinylamine copolymer, flocculating agent and paper strength increasing agent using the same, as well as process for producing the same
    5.
    再颁专利
    Vinylamine copolymer, flocculating agent and paper strength increasing agent using the same, as well as process for producing the same 失效
    乙烯胺共聚物，絮凝剂和使用其的纸强度增加剂，以及其制备方法

    公开(公告)号：USRE34903E

    公开(公告)日：1995-04-11

    申请号：US148384

    申请日：1993-11-08

    申请人： Takaharu Itagaki ,  Mitsuaki Shiraga ,  Shigeru Sawayama ,  Kohichi Satoh

    发明人： Takaharu Itagaki ,  Mitsuaki Shiraga ,  Shigeru Sawayama ,  Kohichi Satoh

    IPC分类号： C08F8/12 ,  C08F8/44 ,  C08F226/02

    CPC分类号： C08F226/02 ,  C08F8/12 ,  C08F8/44 ,  C08F2800/10 ,  C08F2810/50

    摘要： Disclosed herein is a vinylamine copolymer having the structural units represented by the following formulas (I), (II), (III).[.,.]. .Iadd.and .Iaddend.(IV) .[.and (VI).].: ##STR1## wherein x.crclbar. represents an anion or hydroxyl ion R represents a hydrogen atom or a methyl group, M.sym. represents a hydrogen ion or a monovalent cation, in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 2 to 85% by mole, the molar fraction of the structural unit (III) is 5 to 80% by mole,.[.the molar fraction of the structural unit (IV) is 0 to 40% by mole,.]. all of said molar fractions being based on the vinylamine copolymer, and the molar fraction of the structural unit .[.(V).]. (.Iadd.IV) is 0 to 8% by mole which is based on the total content of the structural units (III).[.,.]. .Iadd.and .Iaddend.(IV), .[.and (V),.]. a flocculating agent and a paper strength increasing agent using the vinylamine copolymer, and a process for producing the vinylamine copolymer.

    摘要翻译： 本文公开了具有由下式（I），（II），（III）[和]和（IV）[和（VI）]表示的结构单元的乙烯基胺共聚物：表示阴离子或羟基离子R表示氢 原子或甲基，M（+）​​表示氢离子或一价阳离子，结构单元（I）的摩尔分数为5〜85摩尔％，结构单元（II）的摩尔分数为 2〜85摩尔％，结构单元（III）的摩尔分数为5〜80摩尔％[结构单元（IV）的摩尔分数为0〜40摩尔％]，所有摩尔分数 基于乙烯胺共聚物，结构单元[（V）]（IV）的摩尔分数为0-8％摩尔，其基于结构单元（III）[和]和（IV）的总含量 ），[和（V），]絮凝剂和使用该乙烯胺共聚物的纸强度增加剂，以及制备该乙烯基胺共聚物的方法。

    Paper-making additives comprising cationic polymers
    6.
    发明授权
    Paper-making additives comprising cationic polymers 失效
    包含阳离子聚合物的造纸添加剂

    公开(公告)号：US5389203A

    公开(公告)日：1995-02-14

    申请号：US115917

    申请日：1993-09-01

    申请人： Shigeru Sawayama ,  Kohichi Satoh ,  Shin-ichi Sato ,  Toshiaki Sakakihara

    发明人： Shigeru Sawayama ,  Kohichi Satoh ,  Shin-ichi Sato ,  Toshiaki Sakakihara

    IPC分类号： C08F8/12 ,  C08F8/44 ,  C08F8/48 ,  D21H17/34 ,  D21H17/37 ,  D21H17/45 ,  D21H21/10 ,  D21H21/14 ,  D21H21/18 ,  D21H27/00

    CPC分类号： D21H21/10 ,  C08F8/44 ,  D21H17/37 ,  D21H17/455 ,  D21H21/18

    摘要： Disclosed herein is a paper-making additive.comprising a specified cationic polymer having an amidine structure. The cationic polymer additive for paper-making according to the present invention has 20 to 90% by mole of units represented by the formula (1) and/or (2): ##STR1## wherein R.sup.1 and R.sup.2 independently denote a hydrogen atom or a methyl group, and X- denotes an anion; and has a reduced viscosity of 0.1 to 10 dl/g as measured in a 1N saline solution of 0.1 g/dl at 25.degree. C. The additives are excellent in improving paper or pulp properties, such as freeness, filler retention and paper strength.

    摘要翻译： 本文公开的是具有脒结构的指定阳离子聚合物的造纸添加剂。 根据本发明的用于造纸的阳离子聚合物添加剂具有由式（1）和/或（2）表示的单元的20至90摩尔％：其中R1 R2独立地表示氢原子或甲基，X表示阴离子。 并且在25℃下在1N盐水溶液中测得0.1至10dl / g的比浓粘度为0.1g / dl。添加剂在改善纸浆或纸浆性能方面是优异的，例如游离度，填料保留性和纸张强度。

    Vinylamine copolymer, flocculating agent using the same, and process for preparing the same
    7.
    发明授权
    Vinylamine copolymer, flocculating agent using the same, and process for preparing the same 失效
    乙烯胺共聚物，使用其的絮凝剂及其制备方法

    公开(公告)号：US4808683A

    公开(公告)日：1989-02-28

    申请号：US62755

    申请日：1987-06-16

    申请人： Takaharu Itagaki ,  Mitsuaki Shiraga ,  Shigeru Sawayama ,  Kohichi Satoh

    发明人： Takaharu Itagaki ,  Mitsuaki Shiraga ,  Shigeru Sawayama ,  Kohichi Satoh

    IPC分类号： C08F8/12 ,  C08F226/02

    CPC分类号： C08F8/12 ,  C08F2810/50

    摘要： Disclosed herein is a vinylamine copolymer having the structural units represented by the general formulae (I), (II) and (III): ##STR1## (wherein X represents an anion or hydroxyl ion) ##STR2## (wherein R.sup.1 represents hydrogen atom or a methyl group, R.sup.2 represents hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R.sup.3 represents an alkyl group having 1 to 4 carbon atoms or an oxoalkyl group having 4 to 8 carbon atoms) in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 5 to 85% by mole, and the molar fraction of the structural unit (III) is 90 to 5% by mole, a flocculating agent, a drainage aid and a paper strength increasing agent using such vinylamine copolymer, and a process for producing such vinylamine copolymer.

    摘要翻译： 本文公开了具有由通式（I），（II）和（III）表示的结构单元的乙烯基胺共聚物：其中X表示阴离子或羟基离子。（II） （III）（式中，R 1表示氢原子或甲基，R 2表示氢原子或碳原子数1〜4的烷基，R 3表示碳原子数1〜4的烷基或碳原子数4〜 8个碳原子），结构单元（I）的摩尔分数为5〜85摩尔％，结构单元（II）的摩尔分数为5〜85摩尔％，结构单元（I）的摩尔分数 （III）为90〜5摩尔％，絮凝剂，引流助剂和使用这种乙烯胺共聚物的纸强度增加剂，以及这种乙烯基胺共聚物的制造方法。