| 摘要 |
A polymeric particle including a core, a first shell, and a second shell is provided: 5 the core including, when dry, at least one void; the first shell polymer having a calculated glass transition temperature("Tg") greater than 50 2C and including, as polymerized units, from 15% to 60%, by weight based on the weight of the first shell, monomer selected from the group consisting of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, and mixtures thereof; and from 0.3% to 10%, by weight D based on the weight of the first shell polymer, multiethylenically unsaturated monomer; and the second shell polymer having a Tg of from -60 2C to 50 2C; wherein the weight ratio of the second shell polymer to the total of all other structures of the polymeric particle is from 0.5:1 to 3:1.The particle provides binding functionality and, when dry, opacity and energy savings. A method for providing a 5 polymeric particle and a method for providing opacity to a dry coating are also provided. |
