Abstract: Disclosed are a ?-crystal form nucleating agent composition for polypropylene and an application thereof. The composition is prepared by proportionally mixing barium tetrahydrophthalate, calcium tetrahydrophthalate and the like with adjuvants, such as hydrotalcite or calcium carbonate. The composition has better functions than a single-component ?-nucleating agent. The impact strength of polypropylene subjected to nucleation modification by the ?-crystal form nucleating agent composition can be improved by up to 6 times, and the heat distortion temperature is improved by about 10° C. to 20° C.; in addition, while the impact strength is improved, the flexural modulus of polypropylene can be improved, namely, the rigidity of polypropylene is improved. Therefore, the mechanical and thermal properties of polypropylene are improved.

Abstract: A nucleating agent composition for increasing rigidity and toughness of polypropylene is provided. The nucleating agent composition comprises a carboxylate nucleating agent and a phosphate nucleating agent. The carboxylate nucleating agent is selected from the group consisting of sodium benzoate and hydroxyl aluminum para-tertiary butyl benzoate, and the phosphate nucleating agent is selected from any one of sodium 2,2?-methylene-di(4,6-di-t-butyl phenyl) phosphate and aluminum bis[2,2?-methylene-di(4,6-di-t-butylphenyl)] phosphate. The nucleating agent composition according to the present invention not only can significantly improve the bending modulus and thermal deformation temperature of polypropylene, but also can improve the impact strength of polypropylene.

Abstract: A nucleating agent composition for increasing rigidity and toughness of polypropylene is provided. The nucleating agent composition comprises a carboxylate nucleating agent and a phosphate nucleating agent. The carboxylate nucleating agent is selected from the group consisting of sodium benzoate and hydroxyl aluminum para-tertiary butyl benzoate, and the phosphate nucleating agent is selected from any one of sodium 2,2?-methylene-di(4,6-di-t-butyl phenyl) phosphate and aluminum bis[2,2?-methylene-di(4,6-di-t-butylphenyl)] phosphate. The nucleating agent composition according to the present invention not only can significantly improve the bending modulus and thermal deformation temperature of polypropylene, but also can improve the impact strength of polypropylene.