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1. 发明公开

EP3168191A1 METHOD FOR PRODUCING PURIFIED ACTIVE SILICIC ACID SOLUTION AND SILICA SOL 有权转让
标题翻译：生产纯化活性硅酸溶液和硅溶胶的方法
公开(公告)号：EP3168191A1
公开(公告)日：2017-05-17
申请号：EP16204020.8
申请日：2012-09-14
申请人： Nissan Chemical Industries, Ltd.
发明人： Ema, Kiyomi , Takakuma, Noriyuki , Nishimura, Tohru , Kawashita, Naoki , Yamaguchi, Kouji
IPC分类号： C01B33/141 , C01B33/143 , C01B33/148 , C09K3/14 , C09K13/04
CPC分类号： C09K3/1463 , C01B33/1412 , C01B33/1435 , C01B33/1485 , C09K13/04
摘要： There is provided a method for producing an active silicic acid solution in which the existing amount of foreign matters as plate-like fine particles is reduced and a method for producing a silica sol in which such foreign matters are reduced. A method for producing an active silicic acid solution fulfilling the following condition: (1) the existing amount of plate-like fine particles having a length of one side of 0.2 to 4.0 µm and a thickness of 1 to 100 nm is measured to be 0% to 30% in accordance with measuring method A, the method characterized by including the steps of: preparing an active silicic acid solution by subjecting an alkali silicate aqueous solution having a silica concentration of 0.5% by mass to 10.0% by mass to cation-exchange to remove alkaline components; and filtering the active silicic acid solution through a filter whose removal rate of particles having a primary particle size of 1.0 µm is 50% or more, and whose filtering rate is 13 L/min to 400 L/min per 1 m 2 of the filtration area of the used filter.
摘要翻译：本发明提供一种活性硅酸溶液的制造方法，该活性硅酸溶液中减少了作为板状微粒的异物的存在量，并且提供了减少这种异物的二氧化硅溶胶的制造方法。满足以下条件的活性硅酸溶液的制造方法：（1）将一边的长度为0.2〜4.0μm，厚度为1〜100nm的板状微粒的存在量设为0 所述方法的特征在于包括以下步骤：通过将具有二氧化硅浓度为0.5质量％至10.0质量％的碱金属硅酸盐水溶液进行阳离子聚合来制备活性硅酸溶液，交换去除碱性成分; 并且通过过滤器对活性硅酸溶液进行过滤，所述过滤器的一次粒径为1.0μm的颗粒的去除率为50％以上，过滤速度为13L / min〜400L / min / 的过滤器。

2. 发明授权

EP3168191B1 METHOD FOR PRODUCING PURIFIED ACTIVE SILICIC ACID SOLUTION AND SILICA SOL 有权转让
公开(公告)号：EP3168191B1
公开(公告)日：2018-06-20
申请号：EP16204020.8
申请日：2012-09-14
申请人： Nissan Chemical Industries, Ltd.
发明人： Ema, Kiyomi , Takakuma, Noriyuki , Nishimura, Tohru , Kawashita, Naoki , Yamaguchi, Kouji
IPC分类号： C01B33/141 , C01B33/143 , C01B33/148 , C09K3/14 , C09K13/04
CPC分类号： C09K3/1463 , C01B33/1412 , C01B33/1435 , C01B33/1485 , C09K13/04
摘要： There is provided a method for producing an active silicic acid solution in which the existing amount of foreign matters as plate-like fine particles is reduced and a method for producing a silica sol in which such foreign matters are reduced. A method for producing an active silicic acid solution fulfilling the following condition: (1) the existing amount of plate-like fine particles having a length of one side of 0.2 to 4.0 µm and a thickness of 1 to 100 nm is measured to be 0% to 30% in accordance with measuring method A, the method characterized by including the steps of: preparing an active silicic acid solution by subjecting an alkali silicate aqueous solution having a silica concentration of 0.5% by mass to 10.0% by mass to cation-exchange to remove alkaline components; and filtering the active silicic acid solution through a filter whose removal rate of particles having a primary particle size of 1.0 µm is 50% or more.

3. 发明授权

EP3617344B1 SILICA SOL CONTAINING PHENYLPHOSPHONIC ACID AND APPLICATIONS THEREOF 有权
公开(公告)号：EP3617344B1
公开(公告)日：2020-11-25
申请号：EP19196654.8
申请日：2017-02-24
申请人： Nissan Chemical Industries, Ltd.
发明人： Kashima, Yoshiyuki , Takakuma, Noriyuki , Shimizu, Daisuke
IPC分类号： C23C22/00 , C09D1/00 , C09D5/08

4. 发明公开

EP3617344A1 SILICA SOL CONTAINING PHENYLPHOSPHONIC ACID AND APPLICATIONS THEREOF 有权
公开(公告)号：EP3617344A1
公开(公告)日：2020-03-04
申请号：EP19196654.8
申请日：2017-02-24
申请人： Nissan Chemical Industries, Ltd.
发明人： Kashima, Yoshiyuki , Takakuma, Noriyuki , Shimizu, Daisuke
IPC分类号： C23C22/00 , C09D1/00 , C09D5/08
摘要： There is provided a coating-forming composition for an electrical steel sheet that maintains excellent insulating properties, corrosion resistance, adhesion, and the like required in a coating for an electrical steel sheet, and exhibits excellent viscosity stability, with an increase in viscosity over time being kept gradual. A coating-forming composition for an electrical steel sheet comprises colloidal silica, a phosphate, phenylphosphonic acid or a salt thereof, and an aqueous medium.

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