| 发明名称 | Opacifying polymer particles | ||
| 摘要 | An aqueous dispersion of pigmented opacifying polymer particles, the particles comprising: i. an inorganic core comprising dispersed inorganic pigment particle and a dispersant ii. a first layer of base-swellable polymer comprising acid groups encapsulating the core iii. a second layer of non-base-swellable polymer encapsulating the first layer wherein the dispersant comprises or consists of hydroxyl moieties; and carboxyl groups derived from itaconic acid. | ||
| 申请公布号 | US9574103(B2) | 申请公布日期 | 2017.02.21 |
| 申请号 | US201314652051 | 申请日期 | 2013.12.17 |
| 申请人 | Akzo Nobel Coatings International B.V. | 发明人 | Williams Neal St. John;Wheeler Stephen Arthur;Bradley Robert David |
| 分类号 | C09D133/12;C08K3/22;C09D133/08;C09D133/02;C09C3/10;C09C1/36;C09D7/12;C09D17/00 | 主分类号 | C09D133/12 |
| 代理机构 | McDonnell Boehnen Hulbert & Berghoff LLP | 代理人 | McDonnell Boehnen Hulbert & Berghoff LLP |
| 主权项 | 1. An aqueous dispersion of pigmented opacifying polymer particles, the particles comprising: i) an inorganic core comprising a dispersed inorganic pigment particle and a dispersant, ii) a first layer of a base-swellable polymer comprising acid groups encapsulating the core, and iii) a second layer of a non-base-swellable polymer encapsulating the first layer; wherein the dispersant is a polymer having a weight average molecular weight (Mw) of at least 1000 Daltons, and comprises hydroxyl moieties, and carboxyl groups derived from itaconic acid. | ||
| 地址 | Arnhem NL | ||