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    Precipitated silica particulates having controlled porosity
    1.
    发明授权
    Precipitated silica particulates having controlled porosity 失效
    具有受控孔隙率的沉淀二氧化硅微粒

    公开(公告)号：US5968470A

    公开(公告)日：1999-10-19

    申请号：US227285

    申请日：1994-04-13

    申请人： Jacques Persello

    发明人： Jacques Persello

    IPC分类号： C01B33/18 ,  C01B33/187 ,  C01B33/193 ,  C01B33/12

    CPC分类号： C01B33/193 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/19 ,  C01P2006/82 ,  C01P2006/90

    摘要： Precipitated silica particulates having a BET specific surface ranging from 20 to 300 m.sup.2 /g, a CTAB specific surface ranging from 10 to 200 m.sup.2 /g, an oil uptake (DBP) ranging from 80 to 400 cm.sup.3 /100 g, a pore volume ranging from 1 to 10 cm.sup.3 /g and a mean pore diameter ranging from 10 to 50 nm, well adapted for such applications as the coating of paper and catalysis, are prepared by (a) simultaneously introducing a silicate and an acid into a dispersion of colloidal silica, thereby providing a silica suspension, (b) next decreasing the pH of such suspension to a value ranging from 3 to 7, and (c) then separating the silica particulates from the final suspension and drying them.

    摘要翻译： BET比表面积为20〜300m2 / g，CTAB比表面积为10〜200m2 / g，油吸收量（DBP）为80〜400cm 3 / 100g，孔体积范围的沉淀二氧化硅微粒 通过（a）同时将硅酸盐和酸引入胶体分散体中制备，适用于诸如纸和催化涂层的应用，其范围为10至50nm，平均孔径为10至50nm。 二氧化硅，从而提供二氧化硅悬浮液，（b）接着将这种悬浮液的pH降低至3至7的值，和（c）然后将二氧化硅微粒与最终的悬浮液分离并干燥。

    Dentifrice-compatible silica particulates
    2.
    发明授权
    Dentifrice-compatible silica particulates 失效

    公开(公告)号：US5614176A

    公开(公告)日：1997-03-25

    申请号：US485512

    申请日：1995-06-07

    申请人： Jacques Persello

    发明人： Jacques Persello

    IPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/154 ,  C01B33/193 ,  A61K7/16 ,  A61K7/18

    CPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/128 ,  C01B33/154 ,  C01B33/193 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/19 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/90

    摘要： Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment, silica particulates have a unique surface chemistry as to be at least 50% compatible with zinc values, and have a number of OH functions, expressed as OH/nm.sup.2, of at most 15 and a zero charge point (PZC) of from 3 to 6.5. In a second embodiment, particulates have a surface chemistry as to be at least 65%, and preferably at least 90% compatible with guanidine values, notably chlorhexidine, and acidity function thereof, Ho, of at least 3.3. In a third embodiment, silica particulates are compatible with organic amines, and have a pH, in aqueous suspension, which varies according to the equations pH.ltoreq.7.5-0.7 log(C) and pH.gtoreq.5.0-0.5 log(C) and which also varies as a function of the electrical conductivity thereof, according to the equations pH.ltoreq.8.5-0.4 log(D) and pH.gtoreq.7.0-0.6 log(D) wherein (C) represents the weight concentration of said silica suspension, expressed % SiO.sub.2 and (D) represents the electrical conductivity of such aqueous silica suspension expressed in microsiemens.cm.sup.-1. In a fourth embodiment, novel silica particulates are compatible with such metal cations as zinc, tin, strontium, and the like, as well as with the fluorides, and have a unique surface chemistry such that the number of OH.sup.- functions thereof, expressed in OH.sup.- /nm.sup.2, is equal to or less than 10, and also have a zero charge point (ZCP) ranging from 3 to 6.5 and a pH, in aqueous suspension, which varies as a function of the electrical conductivity thereof according to the equation pH=b-a log (D) in which a is a constant equal to or less than 0.6; b is a constant equal to or less than 8.5; and (D) represents the electrical conductivity of such aqueous silica suspension, expressed in microsiemens.cm.sup.-1.

    High pH colloidal dispersion of a cerium compound, and a process for its preparation
    3.
    发明授权
    High pH colloidal dispersion of a cerium compound, and a process for its preparation 失效
    铈化合物的高pH胶体分散体及其制备方法

    公开(公告)号：US5922330A

    公开(公告)日：1999-07-13

    申请号：US527355

    申请日：1995-09-12

    申请人： Jean-Yves Chane-Ching ,  Thierry Chopin ,  Jacques Persello

    发明人： Jean-Yves Chane-Ching ,  Thierry Chopin ,  Jacques Persello

    IPC分类号： F01L3/02 ,  A61K8/00 ,  A61K8/02 ,  A61K8/19 ,  A61Q17/04 ,  B01D53/86 ,  B01J13/00 ,  B01J23/10 ,  C01F17/00 ,  C09K3/00 ,  C23F11/00 ,  A61K7/00

    CPC分类号： B82Y30/00 ,  B01J13/0008 ,  C01F17/0043 ,  C01P2004/64 ,  C01P2006/40

    摘要： In a first embodiment of the invention, a colloidal dispersion of a cerium compound is characterised in that it has a pH of at least 4 and a conductivity of at most 5 mS/cm. In a second embodiment, the colloidal dispersion is characterised in that it has a pH of more than 5. In a third embodiment, the colloidal dispersion is characterised in that the colloids have a carbon content such that the carbon/cerium mole ratio is at Least 0.01 and in that the pH is greater than 5.A process for the preparation of these dispersions is characterised in that a first colloidal dispersion is used as a starting material, with a pH which is lower than the pH of the dispersion which is to be prepared, and the pH of the first dispersion is raised while reducing the ionic strength. For the third embodiment, an organic acid is added to the starting dispersion.

    摘要翻译： 在本发明的第一个实施方案中，铈化合物的胶态分散体的特征在于它具有至少4的pH和至多5mS / cm的电导率。 在第二个实施方案中，胶体分散体的特征在于其pH大于5.在第三个实施方案中，胶态分散体的特征在于胶体具有碳/铈摩尔比最低 0.01，pH大于5.制备这些分散体的方法的特征在于，使用第一胶态分散体作为原料，其pH低于分散体的pH值 制备，并且第一分散体的pH升高同时降低离子强度。 对于第三实施方案，向起始分散体中加入有机酸。

    Dentifrice-compatible silica particulates
    4.
    发明授权
    Dentifrice-compatible silica particulates 失效

    公开(公告)号：US5614177A

    公开(公告)日：1997-03-25

    申请号：US485513

    申请日：1995-06-07

    申请人： Jacques Persello

    发明人： Jacques Persello

    IPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/154 ,  C01B33/193 ,  A61K7/16 ,  A61K7/18 ,  C01B33/12 ,  C01B14/04

    CPC分类号： C01B33/154 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/90

    摘要： Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment, silica particulates have a unique surface chemistry as to be at least 50% compatible with zinc values, and have a number of OH functions, expressed as OH/nm.sup.2, of at most 15 and a zero charge point (PZC) of from 3 to 6.5. In a second embodiment, particulates have a surface chemistry as to be at least 65%, and preferably at least 90% compatible with guanidine values, notably chlorhexidine, and acidity function thereof, Ho, of at least 3.3. In a third embodiment, silica particulates are compatible with organic amines, and have a pH, in aqueous suspension, which varies according to the equations pH.ltoreq.7.5-0.7 log(C) and pH.gtoreq.5.0-0.5 log(C) and which also varies as a function of the electrical conductivity thereof, according to the equations pH.ltoreq.8.5-0.4 log(D) and pH.gtoreq.7.0-0.6 log(D) wherein (C) represents the weight concentration of said silica suspension, expressed % SiO.sub.2 and (D) represents the electrical conductivity of such aqueous silica suspension expressed in microsiemens.multidot.cm.sup.-1. In a fourth embodiment, novel silica particulates are compatible with such metal cations as zinc, tin, strontium, and the like, as well as with the fluorides, and have a unique surface chemistry such that the number of OH.sup.- functions thereof, expressed in OH.sup.- /nm.sup.2, is equal to or less than 10, and also have a zero charge point (ZCP) ranging from 3 to 6.5 and a pH, in aqueous suspension, which varies as a function of the electrical conductivity thereof according to the equation pH=b-a log (D) in which a is a constant equal to or less than 0.6; b is a constant equal to or less than 8.5; and (D) represents the electrical conductivity of such aqueous silica suspension, expressed in microsiemens.multidot.cm.sup.-1.

    Dentifrice-compatible silica particulates
    7.
    发明授权
    Dentifrice-compatible silica particulates 失效

    公开(公告)号：US5612020A

    公开(公告)日：1997-03-18

    申请号：US141337

    申请日：1993-10-26

    申请人： Jacques Persello

    发明人： Jacques Persello

    IPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/154 ,  C01B33/193 ,  A61K7/16 ,  A61K7/18 ,  C04B14/04

    CPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/128 ,  C01B33/154 ,  C01B33/193 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/19 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/90

    摘要： Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment, silica particulates have a unique surface chemistry, as to be at least 50% compatible with zinc values, and have a number of OH functions, expressed as OH/nm.sup.2, of at most 15 and a zero charge point (PZC) of from 3 to 6.5. In a second embodiment, particulates have a surface chemistry as to be at least 65%, and preferably at least 90% compatible with guanidine values, notably chlorhexidine, and acidity function thereof, Ho, of at least 3.3. In a third embodiment, silica particulates are compatible with organic amines, and have a pH, in aqueous suspension, which varies according to the equations pH.ltoreq.7.5-0.7 log(C) and pH.gtoreq.5.0-0.5 log(C) and which also varies as a function of the electrical conductivity thereof, according to the equations pH.ltoreq.8.5-0.4 log(D) and pH.gtoreq.7.0-0.6 log(D) wherein (C) represents the weight concentration of said silica suspension, expressed % SiO.sub.2 and (D) represents the electrical conductivity of such aqueous silica suspension expressed in microsiemens.multidot.cm.sup.-1. In a fourth embodiment, novel silica particulates are compatible with such metal cations as zinc, tin, strontium, and the like, as well as with the fluorides, and have a unique surface chemistry such that the number of OH.sup.- functions thereof, expressed in OH.sup.- /nm.sup.2, is equal to or less than 10, and also have a zero charge point (ZCP) ranging from 3 to 6.5 and a pH, in aqueous suspension, which varies as a function of the electrical conductivity thereof according to the equation pH=b-a log (D) in which a is a constant equal to or less than 0.6; b is a constant equal to or less than 8.5; and (D) represents the electrical conductivity of such aqueous silica suspension, expressed in microsiemens.multidot.cm.sup.-1.

    Dentifrice-compatible silica particulates
    8.
    发明授权
    Dentifrice-compatible silica particulates 失效
    牙粉相容的二氧化硅微粒

    公开(公告)号：US5616316A

    公开(公告)日：1997-04-01

    申请号：US477554

    申请日：1995-06-07

    申请人： Jacques Persello

    发明人： Jacques Persello

    IPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/154 ,  C01B33/193 ,  A61K7/16 ,  A61K7/18 ,  C04B14/04

    CPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/128 ,  C01B33/154 ,  C01B33/193 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/19 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/90

    摘要： Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment, silica particulates have a unique surface chemistry as to be at least 50% compatible with zinc values, and have a number of OH functions, expressed as OH/nm.sup.2, of at most 15 and a zero charge point (PZC) of from 3 to 6.5. In a second embodiment, particulates have a surface chemistry as to be at least 65%, and preferably at least 90% compatible with guanidine values, notably chlorhexidine, and acidity function thereof, Ho, of at least 3.3. In a third embodiment, silica particulates are compatible with organic amines, and have a pH, in aqueous suspension, which varies according to the equations pH.ltoreq.7.5-0.7 log(C) and pH.gtoreq.5.0-0.5 log(C) and which also varies as a function of the electrical conductivity thereof, according to the equations pH.ltoreq.8.5-0.4 log(D) and pH.gtoreq.7.0-0.6 log(D) wherein (C) represents the weight concentration of said silica suspension, expressed % SiO.sub.2 and (D) represents the electrical conductivity of such aqueous silica suspension expressed in microsiemens.multidot.cm.sup.-. In a fourth embodiment, novel silica particulates are compatible with such metal cations as zinc, tin, strontium, and the like, as well as with the fluorides, and have a unique surface chemistry such that the number of OH.sup.- functions thereof, expressed in OH.sup.- /nm.sup.2, is equal to or less than 10, and also have a zero charge point (ZCP) ranging from 3 to 6.5 and a pH, in aqueous suspension, which varies as a function of the electrical conductivity thereof according to the equation pH=b-a log (D) in which a is a constant equal to or less than 0.6; b is a constant equal to or less than 8.5; and (D) represents the electrical conductivity of such aqueous silica suspension, expressed in microsiemens.multidot.cm.sup.-.

    摘要翻译： 特别适用于配制成洁齿剂组合物的新型二氧化硅颗粒显示出独特的物理和化学性质。 在一个实施方案中，二氧化硅微粒具有与锌值至少50％相容的独特的表面化学性质，并且具有表示为OH / nm2至多为15的多个OH官能团，并且具有至多15个的零电荷点（PZC） 从3到6.5。 在第二实施方案中，颗粒的表面化学性质至少为65％，优选至少90％与胍值，特别是氯己定及其酸度函数Ho至少为3.3。 在第三个实施方案中，二氧化硅颗粒与有机胺相容，并且具有在水悬浮液中的pH，根据方程式，pH <= 7.5-0.7log（℃）和pH> / = 5.0-0.5log（C ），并且其也根据其电导率的函数而变化，根据方程式pH <= 8.5-0.4log（D）和pH> / = 7.0-0.6log（D）其中（C）表示 所述二氧化硅悬浮液表示为％SiO 2，（D）表示以微西门子xcm-表示的这种水性二氧化硅悬浮液的电导率。 在第四个实施方案中，新的二氧化硅微粒与诸如锌，锡，锶等的金属阳离子以及与氟化物相容，并且具有独特的表面化学性质，使得OH-官能团的数目以 OH- / nm 2等于或小于10，并且还具有范围为3至6.5的零电荷点（ZCP）和在水性悬浮液中的pH，其根据等式的电导率而变化 pH = ba log（D）其中a为等于或小于0.6的常数; b是等于或小于8.5的常数; 和（D）表示这种二氧化硅悬浮液的电导率，以微西门氏菌表示。