The invention provides high surface area talc compositions by a novel hybrid milling method or soaking method. The hybrid milling method comprises dry milling talc powder followed by mixing with water and wet milling to provide a nano-talc slurry with high surface area, also of the invention. The soaking method comprises dry milling talc powder followed by mixing with water and soaking to provide high surface area nano-talc slurry. The slurry may be dewatered and dried to provide dry nano-talc powder. The nano-talc powder provided by the invention is a novel hydrophilic talc composition. Further embodiments of the invention include organic solvent dispersed nano-talc slurries and methods for providing the same. These slurries can be used to provide polymer nano-talc composites in the form of coatings, sealing and gasketing materials, foams, extruded thermoplastic and thermoset sheets and films, thermoplastic pellets, thermoplastic and thermoset molded polymer composite articles. Another embodiment is a polyurethane nano-talc composite article derived from the organic solvent dispersed slurries.
本发明通过一种新颖的混合研磨法或浸泡法提供高表面积
滑石粉组合物。混合碾磨法包括干法碾磨
滑石粉,然后与
水混合并进行湿法碾磨,以提供同样属于本发明的高比表面积纳米
滑石浆料。浸泡法包括干法研磨
滑石粉,然后与
水混合并浸泡,以提供高表面积的纳米
钙浆料。浆液经脱
水和干燥后可得到纳米
钙干粉。本发明提供的纳米
钙粉末是一种新型亲
水性
滑石粉组合物。本发明的进一步实施方案包括有机溶剂分散的纳米
滑石浆料和提供这种浆料的方法。这些浆料可用于提供涂层、密封和垫圈材料、泡沫、挤出热塑性和热固性片材和薄膜、热塑性颗粒、热塑性和热固性模塑聚合物复合材料等形式的聚合物纳米
滑石复合材料。另一个实施方案是由有机溶剂分散浆料制成的聚
氨酯纳米
钙复合材料制品。