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    • 8. 发明授权
    • Water-absorbent agent and method for manufacturing the same
    • 吸水剂及其制造方法
    • US06187872B1
    • 2001-02-13
    • US09051313
    • 1998-04-06
    • Toru YanaseKazuki KimuraShin-ichi FujinoKinya NagasunaKunihiko IshizakiHirotama FujimaruNobuyuki Harada
    • Toru YanaseKazuki KimuraShin-ichi FujinoKinya NagasunaKunihiko IshizakiHirotama FujimaruNobuyuki Harada
    • C08F812
    • A61L15/60B01J20/26C08F8/00C08F8/44C08F2800/20C08F2810/20C08F220/06
    • A hydrogel polymer obtained by polymerizing a monomer component including acrylic acid (salt) is post-neutralized so that each of polymer particles derived from a polymer produced by neutralizing the hydrogel polymer has an allowable neutralization ratio. The polymer as obtained by neutralizing the hydrogel polymer is reacted with a crosslinking agent reactive to a functional group of the polymer. The allowable neutralization ratio, for example, is a neutralization ratio which is not lower, by not less than 20 mole percent, or more than, at least 55 mole percent, than an average neutralization ratio of a mass of the polymer particles, and the post-neutralization is carried out so that a number of polymer particles having a non-allowable neutralization ratio outside the allowable neutralization range is not more than 10 in 200 polymer particles, thus obtaining a water-absorbent agent having high absorbency under no applied pressure and high pressure wherein the amount of water soluble component is lower compared with the conventional water-absorbent agent and a change in pH of a swollen gel is small.
    • 通过使包含丙烯酸(盐)的单体组分聚合而获得的水凝胶聚合物被后中和,使得通过中和水凝胶聚合物产生的聚合物衍生的各聚合物颗粒具有允许的中和比。 通过中和水凝胶聚合物获得的聚合物与与聚合物的官能团反应的交联剂反应。 例如,容许的中和比例是中和比,其比不到聚合物颗粒的质量的平均中和比不低于20摩尔%,或至多55摩尔%,而且 进行中和后,使得在200个聚合物粒子中,许多中和比例不超过允许中和比例的聚合物颗粒数不超过10个,从而获得在无施加压力下具有高吸收性的吸水剂, 其中水溶性成分的量与常规吸水剂相比较低,并且溶胀凝胶的pH变化很小。
    • 9. 发明授权
    • Water-absorbent agent powders and manufacturing method of the same
    • 吸水剂粉末及其制造方法相同
    • US5981070A
    • 1999-11-09
    • US793712
    • 1997-03-03
    • Kunihiko IshizakiKinya NagasunaNobuyuki Harada
    • Kunihiko IshizakiKinya NagasunaNobuyuki Harada
    • A61L15/60C08F8/00C08J3/12B32B5/16C08F2/16
    • C08F8/00A61L15/60C08J3/245C08J9/08C08J9/102C08J9/36C08J2207/12C08J2300/14C08J2333/02Y10S521/905Y10T428/2991Y10T428/2998
    • A manufacturing method of water-absorbent agent powders of the present invention is a method of a reducing an amount of a residue of an epoxy crosslinking agent remaining therein by adding a nucleophilic reagent in a form of powder to surface region crosslinked water-absorbent resin powders having a carboxyl group under an applied heat in which the residue of the crosslinking agent remains. Since the method permits an amount of the residue of the crosslinking agent to be reduced by adding a nucleophilic reagent to the heated water-absorbent resin powders, the water-absorbent agent powders exhibiting well-balanced properties which are mutually negatively correlated from one another, i.e., high absorbency under pressure, a reduced amount of a residue of the epoxy crosslinking agent and a high absorbing rate compared with the conventional surface region crosslinked water-absorbent resin powders can be achieved. Such water-absorbent agent powders are suitably used in sanitary materials such as disposable diaper, sanitary napkins, etc.
    • PCT No.PCT / JP96 / 01863 Sec。 371日期1997年3月3日 102(e)1997年3月3日PCT PCT 1996年7月5日PCT公布。 出版物WO97 / 03114 日本1997年1月30日本发明的吸水剂粉末的制造方法是通过将表面区域交联的粉末状的亲核试剂添加到其中而残留的环氧交联剂的残渣量减少的方法 具有羧基的吸水性树脂粉末,其中保留了交联剂的残余物。 由于该方法允许通过向加热的吸水性树脂粉末中添加亲核试剂来减少交联剂的残留量,所以表现出彼此相互负相关的良好平衡性能的吸水剂粉末, 即,与传统的表面区域交联的吸水性树脂粉末相比,可以实现在压力下的高吸收性,环氧交联剂残留量的减少和吸收率高的优点。 这种吸水剂粉末适用于一次性尿布,卫生巾等卫生材料。
    • 10. 发明授权
    • Process for preparing an absorbent resin crosslinked with a mixture of
trimethylolpropane diacrylate and triacrylate
    • 制备用三羟甲基丙烷二丙烯酸酯和三丙烯酸酯的混合物交联的吸收性树脂的方法
    • US5574121A
    • 1996-11-12
    • US262065
    • 1994-06-17
    • Yoshio IrieNobuyuki HaradaKinya NagasunaKohichi HirotaYoshihiko MasudaHideaki NaganoHideyuki Kubo
    • Yoshio IrieNobuyuki HaradaKinya NagasunaKohichi HirotaYoshihiko MasudaHideaki NaganoHideyuki Kubo
    • A61L15/24C08F220/04C08F236/22
    • C08F220/04A61L15/24Y10S526/93
    • A process for preparing an absorbent resin includes the steps of: preparing a first crosslinking agent (A) including at least two polymerizable unsaturated bonds; preparing a second crosslinking agent (B) including at least two polymerizable unsaturated bonds and hydroxyl groups; preparing a crosslinking agent including (A) and (B) with a ratio of (A) to (B) ranging from 95/5 to 50/50; and polymerizing a hydrophilic unsaturated monomer having at least one carboxyl group using the crosslinking agent. The crosslinking agent includes a crosslinking agent which includes a main component at least 90 percent by weight, the main component being an ester having at least two polymerizable unsaturated bonds, wherein the ester is composed of a polyhydroxy alcohol (C) having not more than six carbon atoms and at least three hydroxy groups, and an unsaturated carboxylic acid (D); and a molecular weight ratio of the main component to a standard compound (E) is in the range of from 0.7/1 to less than 1.3/1, (E) being an ester composed of (C) that composes the main component, and (D) that composes the main component, in which all the hydroxy groups in (C) are ester-linked with (D).
    • 制备吸收性树脂的方法包括以下步骤:制备包含至少两个可聚合不饱和键的第一交联剂(A); 制备包含至少两个可聚合不饱和键和羟基的第二交联剂(B); 制备包含(A)和(B)的交联剂,比例为(A)至(B)为95/5至50/50; 并使用交联剂聚合具有至少一个羧基的亲水性不饱和单体。 交联剂包括交联剂,其包含至少90重量%的主要组分,主要组分是具有至少两个可聚合不饱和键的酯,其中该酯由不超过六个的多羟基醇(C)组成 碳原子和至少三个羟基,和不饱和羧酸(D); 并且主成分与标准化合物(E)的分子量比在0.7 / 1〜小于1.3 / 1的范围内,(E)是由构成主成分的(C)构成的酯,和 (D)构成其中(C)中的所有羟基与(D)酯连接的主要组分。