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    • 32. 发明授权
    • Production of stable aqueous silica sol
    • 生产稳定的水性硅胶
    • US5196177A
    • 1993-03-23
    • US641709
    • 1991-01-15
    • Yoshitane WatanabeYoshiyuki KashimaKenji Tanimoto
    • Yoshitane WatanabeYoshiyuki KashimaKenji Tanimoto
    • C01B33/149
    • C01B33/149
    • A sol of flat silica particles (100-1000 nm in size) is produced by the following steps (a) to (d) from an acidic aqueous sol (S.sub.0) of negatively charged silica particles (7-30 nm in diameter) and an aqueous solution (B) of basic aluminum or zirconium salt.(a) mixing 100 parts by weight (as SiO.sub.2) of the sol (S.sub.0) with 0.2-10 parts by weight (as Al.sub.2 O.sub.3 or ZrO.sub.2) of the aqueous solution (B), and adjusting the resulting sol to pH 4-7, thereby yielding a sol (S.sub.1),(b) mixing 100 parts by weight (as SiO.sub.2) of the sol (S.sub.1) with 20-200 parts by weight (as SiO.sub.2) of the sol (S.sub.0), and adjusting the resulting sol to pH 4-7, thereby yielding a sol (S.sub.2),(c) mixing 100 parts by weight (as SiO.sub.2) of the sol (S.sub.2) with the aqueous solution (B) in an amount corresponding to 2-50% of the amount (as Al.sub.2 O.sub.3 or ZrO.sub.2 in parts by weight) added to 100 parts by weight (as SiO.sub.2) of the sol (S.sub.0) used in step (a), and adjusting the resulting sol to pH 4-7, thereby yielding a sol (S.sub.3), and(d) mixing 100 parts by weight (as SiO.sub.2) of the sol (S.sub.3) with the sol (S.sub.0) in an amount corresponding to 10-95% of the amount (as SiO.sub.2 in parts by weight) added to 100 parts by weight (as SiO.sub.2) of the sol (S.sub.1) in step (b), and adjusting the resulting sol to pH 4-7, thereby yielding a sol (S.sub.4).
    • 38. 发明授权
    • Method for preparing elongated-shaped silica sol
    • 制备细长形硅胶的方法
    • US5597512A
    • 1997-01-28
    • US323119
    • 1994-10-14
    • Yoshitane WatanabeYoshiyuki KashimaHiroyuki Takagi
    • Yoshitane WatanabeYoshiyuki KashimaHiroyuki Takagi
    • C01B33/148B01J13/00C01B33/141C01B33/151
    • C01B33/141B01J13/00
    • A method for preparing a silica sol having an elongated shape comprising a step (a) where an aqueous solution containing a water-soluble calcium salt or a water-soluble magnesium salt or a mixture of the water-soluble calcium salt or the water-soluble magnesium salt is mixed with an aqueous colloidal solution of an active silicic acid; a step (b) where an alkaline substance is mixed with the aqueous liquid obtained in the step (a); a step (c) where a part or the whole of the mixture obtained in the step (b) is heated at 60.degree. C. or higher to obtain a heel solution and a feed solution is prepared by a part of the mixture obtained in the step (b) or a mixture separately prepared by the step (b) and the feed solution is added to the heel solution; and a step where water is evaporated during said addition step so that SiO.sub.2 concentration is concentrated to 6 to 30% by weight.
    • 一种制备具有细长形状的硅溶胶的方法,包括步骤(a),其中含有水溶性钙盐或水溶性镁盐的水溶液或水溶性钙盐或水溶性钙盐的混合物 镁盐与活性硅酸的水性胶体溶液混合; 步骤(b)其中将碱性物质与步骤(a)中获得的水性液体混合; 步骤(c)将步骤(b)中获得的混合物的一部分或全部加热至60℃或更高以获得脚后跟溶液,并且通过在 将步骤(b)或通过步骤(b)分开制备的混合物和进料溶液加入到脚后跟溶液中; 以及在所述添加步骤中水蒸发的步骤,使SiO 2浓度浓缩至6〜30重量%。
    • 39. 发明授权
    • Binders for manufacture of precision casting molds
    • 用于制造精密铸造模具的粘合剂
    • US4769076A
    • 1988-09-06
    • US881274
    • 1986-07-02
    • Yoshitane WatanabeAkira KitajimaKeiko TasakiIsamu Yuuki
    • Yoshitane WatanabeAkira KitajimaKeiko TasakiIsamu Yuuki
    • B22C1/18B22C1/20B28B7/28
    • B22C1/205
    • Binders for manufacture of precision casting molds are provided, which are highly stable and are advantageous in that these may impart a high strength to the green molds as obtained by forming an accumulative refractory coat layer on a water-soluble pattern and then taking off the pattern from the coat layer, that no interlayer cleavage occurs in the accumulative coat layer when the pattern is taken off in the formation of the green mold, that the binders may impart a high strength to fired molds, that the castings as obtained by the use of the present fired molds are free from the surface roughness and other surface faults and that the dimension accuracy of the castings is not deteriorated at all by the use of the present binders.The binders of the present invention are characterized by containing the following components (a), (b) and (c) and optionally (d):(a) an organo-silicasol capable of providing 5-50 parts by weight of SiO.sub.2 in the binder;(b) 1-50 parts by weight of an alkyl silicate, an alkoxy-organosilane or a mixture thereof in the binder;(c) 1-30 parts by weight of a binder-soluble amine in the binder;(d) 1-30 parts by weight of an alkoxide of Ti, Zr, Sn, Al or In or a mixture thereof in the binder.
    • 提供了用于制造精密铸造模具的粘合剂,其是高度稳定的,并且有利的是这些可以赋予生坯模具高的强度,所述模具通过在水溶性图案上形成累积的耐火涂层,然后脱模 在涂层形成时,当在模具的形成中取出图案时,在累积涂层中不发生层间剥离,粘合剂可赋予烧结模具高的强度,通过使用 本发明的模具没有表面粗糙度和其他表面缺陷,并且通过使用本发明的粘合剂,铸件的尺寸精度根本不劣化。 本发明的粘合剂的特征在于含有以下组分(a),(b)和(c)和任选的(d):(a)能够提供5-50重量份SiO 2的有机二氧化硅 粘合剂 (b)1-50重量份的粘合剂中的硅酸烷基酯,烷氧基 - 有机硅烷或它们的混合物; (c)粘合剂中1-30重量份的粘合剂可溶性胺; (d)1-30重量份的Ti,Zr,Sn,Al或In的醇盐或它们在粘合剂中的混合物。
    • 40. 发明授权
    • Moniliform silica sol, process for producing the same, and ink-jet recording medium
    • 单晶硅溶胶,其制造方法和喷墨记录介质
    • US06632489B1
    • 2003-10-14
    • US09763965
    • 2001-02-28
    • Yoshitane WatanabeYoshiyuki KashimaKiyomi EmaYutaka Ohmori
    • Yoshitane WatanabeYoshiyuki KashimaKiyomi EmaYutaka Ohmori
    • B32B300
    • B41M5/5218B41M2205/12C01B33/1485
    • A stable silica sol having an SiO2 concentration of 1 to 50% by weight and containing liquid-medium dispersed moniliform colloidal silica particles each having 3 or more as a ratio of D1/D2 of a particle diameter (D1 nm) measured by a dynamic light scattering method to a mean particle diameter (a particle diameter measured by a nitrogen absorption method: D2 nm) where D1 is 50 to 500 nm, and which are comprised by spherical colloidal silica particles having a mean particle diameter of 10 to 80 nm and metal oxide-containing silica bonding these spherical-colloidal silica particles, and in which the spherical colloidal silica particles link in rows in only one plane, process for producing such and a coating composition for ink receiving layers containing such a silica sol and an ink jet recording medium.
    • 一种稳定的硅溶胶,其SiO 2浓度为1〜50重量%,含有液体介质分散的单状胶体二氧化硅粒子,其分别具有3个以上的D < 具有粒径(D 1 nm的HIL> 1 / D 2 )通过动态光散射法测量为平均粒径(通过氮吸收法测量的粒径:D 2 PDAT> nm)其中D 1 为50〜500nm,由平均粒径为10〜80nm的球形胶体二氧化硅粒子和与这些球状胶体二氧化硅粒子结合的含金属氧化物的二氧化硅粒子构成, 球形胶体二氧化硅颗粒仅在一个平面中成行排列,制备方法和用于含有这种二氧化硅溶胶和喷墨记录介质的油墨接收层的涂料组合物。