Process for improving hiding efficiency in pigment paints
    1.
    发明授权
    Process for improving hiding efficiency in pigment paints 有权
    提高颜料涂料遮盖效率的方法

    公开(公告)号:US08546467B2

    公开(公告)日:2013-10-01

    申请号:US13649611

    申请日:2012-10-11

    Abstract: The present invention relates to a process comprising the steps of a) contacting an aqueous dispersion of a TiO2 slurry containing adsorbing dispersant with an adsorbing latex to form a mixture, wherein the pH of the mixture of the TiO2 slurry and adsorbing latex are sufficiently high to inhibit interaction between the TiO2 and the adsorbing dispersant; then b) lowering the pH of the mixture of step a) sufficiently to promote interaction between the TiO2 and the adsorbing latex, thereby forming a composite; wherein the adsorbing latex comprises structural units of itaconic acid or a salt thereof. The process of the present invention provides for improved hiding and reduced grit for coatings compositions.

    Abstract translation: 本发明涉及一种方法,包括以下步骤:a)将含有吸附分散剂的TiO 2浆料的水性分散体与吸附胶乳接触以形成混合物,其中TiO 2浆料和吸附胶乳的混合物的pH足够高至 抑制TiO2与吸附分散剂的相互作用; 然后b)降低步骤a)的混合物的pH以充分促进TiO 2和吸附胶乳之间的相互作用,从而形成复合材料; 其中所述吸附胶乳包含衣康酸或其盐的结构单元。 本发明的方法提供了改进的涂层组合物的隐藏和减小的砂砾。

    PROCESS FOR IMPROVING HIDING EFFICIENCY IN PIGMENT PAINTS
    2.
    发明申请
    PROCESS FOR IMPROVING HIDING EFFICIENCY IN PIGMENT PAINTS 有权
    改善涂料中遮盖效率的方法

    公开(公告)号:US20130096250A1

    公开(公告)日:2013-04-18

    申请号:US13649611

    申请日:2012-10-11

    Abstract: The present invention relates to a process comprising the steps of a) contacting an aqueous dispersion of a TiO2 slurry containing adsorbing dispersant with an adsorbing latex to form a mixture, wherein the pH of the mixture of the TiO2 slurry and adsorbing latex are sufficiently high to inhibit interaction between the TiO2 and the adsorbing dispersant; then b) lowering the pH of the mixture of step a) sufficiently to promote interaction between the TiO2 and the adsorbing latex, thereby forming a composite; wherein the adsorbing latex comprises structural units of itaconic acid or a salt thereof. The process of the present invention provides for improved hiding and reduced grit for coatings compositions.

    Abstract translation: 本发明涉及一种方法,包括以下步骤:a)将含有吸附分散剂的TiO 2浆料的水性分散体与吸附胶乳接触以形成混合物,其中TiO 2浆料和吸附胶乳的混合物的pH足够高至 抑制TiO2与吸附分散剂的相互作用; 然后b)降低步骤a)的混合物的pH以充分促进TiO 2和吸附胶乳之间的相互作用,从而形成复合材料; 其中所述吸附胶乳包含衣康酸或其盐的结构单元。 本发明的方法提供了改进的涂层组合物的隐藏和减小的砂砾。

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