公开(公告)号：US5672201A

公开(公告)日：1997-09-30

申请号：US611300

申请日：1996-03-05

申请人： Leslie Ainsley Simpson ,  Keith Robson ,  David Trevor Knight ,  Ronald Brown

发明人： Leslie Ainsley Simpson ,  Keith Robson ,  David Trevor Knight ,  Ronald Brown

IPC分类号： C09C1/00 ,  C09C1/36 ,  C09C3/00 ,  C09D7/12 ,  C09D17/00 ,  C04B14/20

CPC分类号： C09D7/1275 ,  C09C1/0084 ,  C09C1/3661 ,  C09C1/3669 ,  C09C1/3676 ,  C09D7/1216 ,  C01P2002/60 ,  C01P2004/62 ,  C01P2004/84 ,  C01P2006/40 ,  C01P2006/60 ,  C08K3/22

摘要： A process for preparing a structured composite pigmentary material comprises forming a dispersion of uncoated particles of titanium dioxide at a pH value at which the particles have a surface charge and subjecting the dispersion to cross-flow filtration until the dispersion contains more than 50% by weight titanium dioxide. The concentrated dispersion is mixed with a dispersion of chemically distinct particles having a surface charge of opposite sign under conditions which ensure that the sign of the surface charge on either of the particulate materials is not reversed. In the resultant composite pigmentary material the titanium dioxide particles are held in association with the chemically distinct particles as a result of said surface charges. The structured composite can be used to produce paints having higher opacity than conventional paints containing an equivalent amount of titanium dioxide and the durability of these paints is better than a conventional paint containing a similar amount of uncoated titanium dioxide.

摘要翻译： 一种制备结构复合颜料材料的方法包括在该颗粒具有表面电荷的pH值下形成二氧化钛的未涂覆颗粒的分散体，并对该分散体进行交叉流过滤，直到分散体含有超过50重量％ 二氧化钛。 将浓缩的分散体与具有相反符号表面电荷的化学上不同的颗粒的分散体混合，确保任一粒状材料上的表面电荷的符号不被反转。 在所得的复合颜料材料中，作为所述表面电荷的结果，二氧化钛颗粒与化学上不同的颗粒结合在一起。 结构化复合材料可用于生产具有比含有等量的二氧化钛的常规涂料更高的不透明度的涂料，并且这些涂料的耐久性优于含有相似量的未涂覆二氧化钛的常规涂料。

公开(公告)号：US5643974A

公开(公告)日：1997-07-01

申请号：US596050

申请日：1996-02-06

申请人： Leslie Ainsley Simpson ,  Keith Robson ,  David Trevor Knight ,  Martin Alec Williamson

发明人： Leslie Ainsley Simpson ,  Keith Robson ,  David Trevor Knight ,  Martin Alec Williamson

IPC分类号： C09C1/36 ,  C08K3/00 ,  C08L31/02 ,  C09C1/00 ,  C09C3/10 ,  C09D7/12 ,  C09D17/00 ,  C09D127/06 ,  C08K3/20

CPC分类号： B82Y30/00 ,  C08K3/0033 ,  C09C1/0081 ,  C09C1/0084 ,  C09D127/06 ,  C09D7/1225 ,  C09D7/125 ,  C09D7/1266 ,  C09D7/1275 ,  C01P2002/60 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2004/82 ,  C01P2004/84 ,  C01P2006/60 ,  C08K3/22 ,  C08K9/02 ,  C08L27/06 ,  C08L31/02

摘要： A process for the production of a structured composite pigmentary material in the form of a dispersion comprises mixing an aqueous dispersion of inorganic pigmentary particles and an aqueous dispersion of polyvinyl chloride (PVC) particles. The inorganic pigment particles carry a positive surface charge and the PVC particles carry a negative surface charge and the particles in the composite are held in association as a result of these charges. The inorganic pigment particles and PVC particles are mixed in the presence of a surfactant system which provides both anionic and steric stabilisation. In one embodiment the surfactant system comprises a nonionic surfactant having an HLB value greater than 12 and at least 2% by weight of an anionic surfactant with respect to the weight of PVC particl In a second embodiment the surfactant system comprises at least 2% by weight (with respect to PVC) of one of more surfactants providing anionic and steric stabilisation and being ethylene oxide condensation products having a polyoxyethylene chain with an average length of at least 8 oxyethylene units. The product is useful in paints and provides improved opacity compared to conventional pigments and improved gloss compared to known structured composite pigments.

摘要翻译： 用于制备分散体形式的结构复合颜料材料的方法包括混合无机颜料颗粒的水分散体和聚氯乙烯（PVC）颗粒的水分散体。 无机颜料颗粒携带正表面电荷，并且PVC颗粒携带负表面电荷，并且复合材料中的颗粒由于这些电荷而保持结合。 无机颜料颗粒和PVC颗粒在提供阴离子和空间稳定化的表面活性剂体系的存在下混合。 在一个实施方案中，表面活性剂体系包含HLB值大于12的非离子表面活性剂和至少2重量％的阴离子表面活性剂相对于PVC颗粒的重量。在第二个实施方案中，表面活性剂体系包含至少2重量％ （相对于PVC），提供阴离子和空间稳定化的更多表面活性剂之一，并且是具有平均长度为至少8个氧化乙烯单元的聚氧乙烯链的环氧乙烷缩合产物。 与常规颜料相比，该产品在涂料中是有用的，并且与已知的结构复合颜料相比提供了改善的不透明度和改善的光泽度。