专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06015456A Alumina particles having high dispersibility and plasticity 失效
标题翻译：氧化铝颗粒具有高分散性和可塑性
公开(公告)号：US06015456A
公开(公告)日：2000-01-18
申请号：US697470
申请日：1996-08-23
申请人： Takeshi Fukuda , Ryuichi Shido
发明人： Takeshi Fukuda , Ryuichi Shido
IPC分类号： C01F7/02 , C01F7/44 , C09C1/40 , C09C3/06 , C09D1/00
CPC分类号： B82Y30/00 , C01F7/026 , C01F7/448 , C09C1/407 , C09C3/063 , C01P2002/72 , C01P2004/03 , C01P2004/20 , C01P2004/22 , C01P2004/32 , C01P2004/50 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/22 , Y10T428/2991
摘要： Alumina particles having high dispersibility and plasticity, at least on the surface of which a phosphoric acid or phosphate is present and suitable for use as a material for pigments for paints, precision abrasives or ceramics. The alumina particles are produced by adding a crystallization inhibitor containing at least phosphate ion to aluminum hydroxide or alumina hydrate and then conducting a hydrothermal synthesis treatment. The amount of the phosphate ion to be added is in the range of 3.0.times.10.sup.-3 to 2.5.times.10.sup.-2 mol per mol of aluminum hydroxide or alumina hydrate. The particle size of aluminum hydroxide or alumina hydrate is 0.1 to 5.0 .mu.m. The hydrothermal synthesis is preferably conducted at 350.degree. C. or above under a pressure of 50 to 200 atm and at a temperature elevation rate of 50.degree. C./min to 0.3.degree. C./min. The thus obtained alumina is .alpha.-alumina in the form of hexagonal plate single crystal having a particle size of 0.2 to 15 .mu.m, an aspect ratio of 15 to 50 and an isoelectric point at which the zeta-potential is 0 of pH 4 to 8.
摘要翻译：氧化铝颗粒具有高分散性和可塑性，至少在其表面上存在磷酸或磷酸盐，并且适合用作涂料，精密磨料或陶瓷颜料的材料。氧化铝颗粒通过向氢氧化铝或氧化铝水合物中加入至少含有磷酸根离子的结晶抑制剂，然后进行水热合成处理来制备。磷酸根离子的添加量相对于每摩尔氢氧化铝或氧化铝水合物为3.0×10 -3〜2.5×10 -2摩尔。氢氧化铝或氧化铝水合物的粒径为0.1〜5.0μm。水热合成优选在50〜200atm的压力和50℃/分钟〜0.3℃/分钟的升温速度下在350℃以上进行。由此获得的氧化铝是粒径为0.2至15μm，纵横比为15至50的六方板单晶形式的α-氧化铝，ζ电位为0的等电点为pH4至 8。

2. 发明授权

US07067157B2 Flaky α-alumina particles and method for producing the same 有权
标题翻译：片状α-氧化铝粒子及其制造方法
公开(公告)号：US07067157B2
公开(公告)日：2006-06-27
申请号：US09834651
申请日：2001-04-16
申请人： Takeshi Fukuda , Ryuichi Shido
发明人： Takeshi Fukuda , Ryuichi Shido
IPC分类号： A01N59/06 , A61K33/06
CPC分类号： A61K8/26 , A61K8/0254 , A61K2800/651 , A61Q1/02 , C01F7/02 , C01F7/448 , C01P2004/20 , C01P2004/22 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/80 , C01P2006/90 , C09C1/407
摘要： Flake-like α-alumina particles having an average major diameter of 0.5 to 25 μm and an aspect ratio, expressed by particle major diameter/average thickness, of greater than 50 to 2000 and having a thin flat form. The flake-like α-alumina particles are produced by a hydrothermal synthesis process of an aqueous slurry in which the slurry comprises an alumina hydrate and/or an alumina gel, having a particle size of not more than 2 μm and a maximum size of not more than 5.0 μm and phosphoric acid ions in an amount of 1.0×10−3 to 1.0×10−1 mol per mol of the alumina hydrate and/or alumina gel. The flake-like α-alumina particles exhibit good dispersibility when being kneaded as fillers or pigments in rubbers or plastics or as coating agents with a resin and also can be easily dispersed as primary particles in aqueous solvent with high dispersion stability when added to an aqueous slurry of precision abrasives or cosmetics. The particles are desirable in providing cosmetics with good smoothness, tackiness to the skin and spreadability.
摘要翻译：平均长径为0.5〜25μm的鳞片状α-氧化铝粒子，长径比（以粒径长径/平均厚度表示）大于50〜2000，具有薄平面形状。片状α-氧化铝颗粒是通过含水浆料的水热合成方法生产的，其中浆料包含氧化铝水合物和/或氧化铝凝胶，其粒径不大于2μm，最大尺寸不为2μm 相对于每摩尔水合氧化铝和/或氧化铝凝胶，超过5.0微米和磷酸离子的量为1.0×10 -3至1.0×10 -1摩尔。当在橡胶或塑料中作为填料或颜料进行混炼或用树脂涂布剂时，片状α-氧化铝颗粒表现出良好的分散性，并且当添加到水性溶液中时，可以容易地以高分散稳定性将其作为初级颗粒分散在水性溶剂中精密磨料或化妆品浆。这些颗粒在提供化妆品中具有良好的平滑性，对皮肤的粘性和铺展性是理想的。

3. 发明授权

US06197277B1 Process for producing alumina particles having high dispersibility and plasticity 有权
标题翻译：具有高分散性和可塑性的氧化铝颗粒的制造方法
公开(公告)号：US06197277B1
公开(公告)日：2001-03-06
申请号：US09304341
申请日：1999-05-04
申请人： Takeshi Fukuda , Ryuichi Shido
发明人： Takeshi Fukuda , Ryuichi Shido
IPC分类号： C01F702
CPC分类号： B82Y30/00 , C01F7/026 , C01F7/448 , C01P2002/72 , C01P2004/03 , C01P2004/20 , C01P2004/22 , C01P2004/32 , C01P2004/50 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/22 , C09C1/407 , C09C3/063 , Y10T428/2991
摘要： Alumina particles having high dispersibility and plasticity, at least on the surface of which a phosphoric acid or phosphate is present and suitable for use as a material for pigments for paints, precision abrasives or ceramics. The alumina particles are produced by adding a crystallization inhibitor containing at least phosphate ion to aluminum hydroxide or alumina hydrate and then conducting a hydrothermal synthesis treatment. The amount of the phosphate ion to be added is in the range of 3.0×10−3 to 2.5×10−2 mol per mol of aluminum hydroxide or alumina hydrate. The particle size of aluminum hydroxide or alumina hydrate is 0.1 to 5.0 &mgr;m. The hydrothermal synthesis is preferably conducted at 350° C. or above under a pressure of 50 to 200 atm and at a temperature elevation rate of 5° C./min to 0.3° C./min. The thus obtained alumina is &agr;-alumina in the form of hexagonal plate single crystal having a particle size of 0.2 to 15 &mgr;m, an aspect ratio of 15 to 50 and an isoelectric point at which the zeta-potential is 0 of pH 4 to 8.
摘要翻译：氧化铝颗粒具有高分散性和可塑性，至少在其表面上存在磷酸或磷酸盐，并且适合用作涂料，精密磨料或陶瓷颜料的材料。氧化铝颗粒通过向氢氧化铝或氧化铝水合物中加入至少含有磷酸根离子的结晶抑制剂，然后进行水热合成处理来制备。磷酸根离子的添加量相对于每摩尔氢氧化铝或氧化铝水合物为3.0×10 -3〜2.5×10 -2摩尔。氢氧化铝或氧化铝水合物的粒径为0.1〜5.0μm。水热合成优选在350℃以上，压力50〜200atm，升温速度5℃/ min〜0.3℃/ min的范围内进行。由此获得的氧化铝是粒径为0.2-15μm，长宽比为15-50的六方板单晶形式的α-氧化铝，ζ电位为0的等电点为pH4至8 。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式