Nucleating agent compounds are used in polymers, such as polypropylene, to improve both the properties and processing characteristics of the polymer. Some nucleating agents may be used also as clarifiers to reduce the visual haze in finished polymeric articles, thereby increasing clarity of finished polymeric articles. Compounds of a carboxylate salt which employ a combination of an amide group and a metal cation salt perform well as nucleating agents, and provide substantial clarity benefits in a polymer. Other compounds of the invention may employ metal carboxylate salts in combination with an ester group. In other embodiments of the invention a dimer of such compounds may be employed.
                            核化剂化合物被用于聚合物中,例如聚
丙烯,以提高聚合物的性能和加工特性。一些核化剂也可用作澄清剂,以减少成品聚合物制品的视觉浑浊度,从而提高成品聚合物制品的清晰度。一种
羧酸盐化合物,它采用酰胺基团和
金属阳离子盐的组合作为核化剂,表现出良好的性能,并在聚合物中提供了明显的澄清优势。发明的其他化合物可以采用
金属
羧酸盐与酯基的组合。在发明的其他实施例中,这些化合物的二聚体可以被采用。