公开(公告)号：US20110152452A1

公开(公告)日：2011-06-23

申请号：US12901620

申请日：2010-10-11

申请人： Dirk Emiel Paula Mestach ,  Richard Hendrikus Gerrit Brinkhuis ,  Andrea Henricus Johannes Roelofs ,  Hendrik Hermanus Rikus Van Der Horst

发明人： Dirk Emiel Paula Mestach ,  Richard Hendrikus Gerrit Brinkhuis ,  Andrea Henricus Johannes Roelofs ,  Hendrik Hermanus Rikus Van Der Horst

IPC分类号： C08F2/22 ,  C08F2/38

CPC分类号： C08F2/22 ,  C08F291/00

摘要： The present invention relates to a method to prepare a polymer dispersion using an aqueous substantially surfactant-free emulsion polymerization process comprising a seed and a feed stage, in which seed stage at least one ethylenically unsaturated monomer, having a water-solubility of at least 0.3 g/l at polymerization conditions, is polymerized in the presence of an addition fragmentation chain transfer agent and a hydrophilic free radical initiator to form a seed polymer that is substantially insoluble in water and in which feed stage at least one ethylenically unsaturated feed monomer is added to the seed polymer to form polymer particles. With this method a polymer dispersion can be obtained having at least 25 wt. % solid contents in combination with an average polymer particle size smaller than or equal to 300 nm. The invention further relates to a polymer dispersion obtainable by a surfactant-free emulsion polymerization process, a film-forming composition, preferably a coating composition, comprising such a polymer dispersion and coated articles coated with the coating composition. Further, the invention relates to a polymer particle powder obtained from the polymer dispersion and powder coating compositions.

摘要翻译： 本发明涉及一种使用含水基本不含表面活性剂的乳液聚合方法制备聚合物分散体的方法，该方法包括种子和进料阶段，其中种子阶段至少一种烯键式不饱和单体具有至少0.3的水溶性 聚合条件下的g / l在加成断裂链转移剂和亲水性自由基引发剂的存在下聚合以形成基本上不溶于水的种子聚合物，其中进料阶段加入至少一种烯键式不饱和进料单体 到种子聚合物以形成聚合物颗粒。 通过该方法，可以获得聚合物分散体，其具有至少25wt。 ％的固体含量与小于或等于300nm的平均聚合物粒度的组合。 本发明还涉及通过无表面活性剂的乳液聚合方法获得的聚合物分散体，成膜组合物，优选涂料组合物，其包含这种聚合物分散体和涂覆有涂料组合物的涂覆制品。 此外，本发明涉及由聚合物分散体和粉末涂料组合物获得的聚合物颗粒粉末。